Merge branch 'master' into develop

28 files changed, 353 insertions, 3609 deletions

diff --git a/src/main/java/org/traccar/database/ActiveDevice.java b/src/main/java/org/traccar/database/ActiveDevice.java
deleted file mode 100644
index c05d56ad2..000000000
--- a/src/main/java/org/traccar/database/ActiveDevice.java
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * Copyright 2015 - 2020 Anton Tananaev (anton@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import io.netty.channel.Channel;
-import io.netty.handler.codec.http.HttpRequestDecoder;
-import org.traccar.BasePipelineFactory;
-import org.traccar.Protocol;
-import org.traccar.model.Command;
-
-import java.net.SocketAddress;
-
-public class ActiveDevice {
-
-    private final long deviceId;
-    private final Protocol protocol;
-    private final Channel channel;
-    private final SocketAddress remoteAddress;
-    private final boolean supportsLiveCommands;
-
-    public ActiveDevice(long deviceId, Protocol protocol, Channel channel, SocketAddress remoteAddress) {
-        this.deviceId = deviceId;
-        this.protocol = protocol;
-        this.channel = channel;
-        this.remoteAddress = remoteAddress;
-        supportsLiveCommands = BasePipelineFactory.getHandler(channel.pipeline(), HttpRequestDecoder.class) == null;
-    }
-
-    public Channel getChannel() {
-        return channel;
-    }
-
-    public long getDeviceId() {
-        return deviceId;
-    }
-
-    public boolean supportsLiveCommands() {
-        return supportsLiveCommands;
-    }
-
-    public void sendCommand(Command command) {
-        protocol.sendDataCommand(channel, remoteAddress, command);
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/AttributesManager.java b/src/main/java/org/traccar/database/AttributesManager.java
deleted file mode 100644
index 28816645a..000000000
--- a/src/main/java/org/traccar/database/AttributesManager.java
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * Copyright 2017 Anton Tananaev (anton@traccar.org)
- * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import org.traccar.model.Attribute;
-
-public class AttributesManager extends ExtendedObjectManager<Attribute> {
-
-    public AttributesManager(DataManager dataManager) {
-        super(dataManager, Attribute.class);
-    }
-
-    @Override
-    public void updateCachedItem(Attribute attribute) {
-        Attribute cachedAttribute = getById(attribute.getId());
-        cachedAttribute.setDescription(attribute.getDescription());
-        cachedAttribute.setAttribute(attribute.getAttribute());
-        cachedAttribute.setExpression(attribute.getExpression());
-        cachedAttribute.setType(attribute.getType());
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/BaseObjectManager.java b/src/main/java/org/traccar/database/BaseObjectManager.java
deleted file mode 100644
index be6310033..000000000
--- a/src/main/java/org/traccar/database/BaseObjectManager.java
+++ /dev/null
@@ -1,178 +0,0 @@
-/*
- * Copyright 2017 - 2020 Anton Tananaev (anton@traccar.org)
- * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import java.sql.SQLException;
-import java.util.Collection;
-import java.util.HashSet;
-import java.util.LinkedList;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.locks.ReadWriteLock;
-import java.util.concurrent.locks.ReentrantReadWriteLock;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.traccar.model.BaseModel;
-
-public class BaseObjectManager<T extends BaseModel> {
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(BaseObjectManager.class);
-
-    private final ReadWriteLock lock = new ReentrantReadWriteLock();
-
-    private final DataManager dataManager;
-
-    private final Class<T> baseClass;
-    private Map<Long, T> items;
-
-    protected BaseObjectManager(DataManager dataManager, Class<T> baseClass) {
-        this.dataManager = dataManager;
-        this.baseClass = baseClass;
-        refreshItems();
-    }
-
-    protected final void readLock() {
-        lock.readLock().lock();
-    }
-
-    protected final void readUnlock() {
-        lock.readLock().unlock();
-    }
-
-    protected final void writeLock() {
-        lock.writeLock().lock();
-    }
-
-    protected final void writeUnlock() {
-        lock.writeLock().unlock();
-    }
-
-    protected final DataManager getDataManager() {
-        return dataManager;
-    }
-
-    protected final Class<T> getBaseClass() {
-        return baseClass;
-    }
-
-    public T getById(long itemId) {
-        try {
-            readLock();
-            return items.get(itemId);
-        } finally {
-            readUnlock();
-        }
-    }
-
-    public void refreshItems() {
-        if (dataManager != null) {
-            try {
-                writeLock();
-                Collection<T> databaseItems = dataManager.getObjects(baseClass);
-                if (items == null) {
-                    items = new ConcurrentHashMap<>(databaseItems.size());
-                }
-                Set<Long> databaseItemIds = new HashSet<>();
-                for (T item : databaseItems) {
-                    databaseItemIds.add(item.getId());
-                    if (items.containsKey(item.getId())) {
-                        updateCachedItem(item);
-                    } else {
-                        addNewItem(item);
-                    }
-                }
-                for (Long cachedItemId : items.keySet()) {
-                    if (!databaseItemIds.contains(cachedItemId)) {
-                        removeCachedItem(cachedItemId);
-                    }
-                }
-            } catch (SQLException error) {
-                LOGGER.warn("Error refreshing items", error);
-            } finally {
-                writeUnlock();
-            }
-        }
-    }
-
-    protected void addNewItem(T item) {
-        try {
-            writeLock();
-            items.put(item.getId(), item);
-        } finally {
-            writeUnlock();
-        }
-    }
-
-    public void addItem(T item) throws SQLException {
-        dataManager.addObject(item);
-        addNewItem(item);
-    }
-
-    protected void updateCachedItem(T item) {
-        try {
-            writeLock();
-            items.put(item.getId(), item);
-        } finally {
-            writeUnlock();
-        }
-    }
-
-    public void updateItem(T item) throws SQLException {
-        dataManager.updateObject(item);
-        updateCachedItem(item);
-    }
-
-    protected void removeCachedItem(long itemId) {
-        try {
-            writeLock();
-            items.remove(itemId);
-        } finally {
-            writeUnlock();
-        }
-    }
-
-    public void removeItem(long itemId) throws SQLException {
-        BaseModel item = getById(itemId);
-        if (item != null) {
-            dataManager.removeObject(baseClass, itemId);
-            removeCachedItem(itemId);
-        }
-    }
-
-    public final Collection<T> getItems(Set<Long> itemIds) {
-        Collection<T> result = new LinkedList<>();
-        for (long itemId : itemIds) {
-            T item = getById(itemId);
-            if (item != null) {
-                result.add(item);
-            }
-        }
-        return result;
-    }
-
-    public Set<Long> getAllItems() {
-        try {
-            readLock();
-            return items.keySet();
-        } finally {
-            readUnlock();
-        }
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/CalendarManager.java b/src/main/java/org/traccar/database/CalendarManager.java
deleted file mode 100644
index 44ced1082..000000000
--- a/src/main/java/org/traccar/database/CalendarManager.java
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Copyright 2016 - 2017 Anton Tananaev (anton@traccar.org)
- * Copyright 2016 - 2017 Andrey Kunitsyn (andrey@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import org.traccar.model.Calendar;
-
-public class CalendarManager extends SimpleObjectManager<Calendar> {
-
-    public CalendarManager(DataManager dataManager) {
-        super(dataManager, Calendar.class);
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/CommandsManager.java b/src/main/java/org/traccar/database/CommandsManager.java
index 843c89e82..df399cd7a 100644
--- a/src/main/java/org/traccar/database/CommandsManager.java
+++ b/src/main/java/org/traccar/database/CommandsManager.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 - 2020 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 - 2022 Anton Tananaev (anton@traccar.org)
  * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -16,177 +16,112 @@
  */
 package org.traccar.database;
 
-import java.lang.reflect.Field;
-import java.lang.reflect.Modifier;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.List;
-import java.util.Map;
-import java.util.Queue;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ConcurrentLinkedQueue;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.traccar.BaseProtocol;
-import org.traccar.Context;
+import org.traccar.ServerManager;
+import org.traccar.broadcast.BroadcastInterface;
+import org.traccar.broadcast.BroadcastService;
 import org.traccar.model.Command;
-import org.traccar.model.Typed;
+import org.traccar.model.Device;
 import org.traccar.model.Position;
-
-public class CommandsManager  extends ExtendedObjectManager<Command> {
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(CommandsManager.class);
-
-    private final Map<Long, Queue<Command>> deviceQueues = new ConcurrentHashMap<>();
-
-    private final boolean queueing;
-
-    public CommandsManager(DataManager dataManager, boolean queueing) {
-        super(dataManager, Command.class);
-        this.queueing = queueing;
-    }
-
-    public boolean checkDeviceCommand(long deviceId, long commandId) {
-        return !getAllDeviceItems(deviceId).contains(commandId);
+import org.traccar.model.QueuedCommand;
+import org.traccar.session.ConnectionManager;
+import org.traccar.session.DeviceSession;
+import org.traccar.sms.SmsManager;
+import org.traccar.storage.Storage;
+import org.traccar.storage.StorageException;
+import org.traccar.storage.query.Columns;
+import org.traccar.storage.query.Condition;
+import org.traccar.storage.query.Order;
+import org.traccar.storage.query.Request;
+
+import javax.annotation.Nullable;
+import javax.inject.Inject;
+import javax.inject.Singleton;
+import java.util.Collection;
+import java.util.stream.Collectors;
+
+@Singleton
+public class CommandsManager implements BroadcastInterface {
+
+    private final Storage storage;
+    private final ServerManager serverManager;
+    private final SmsManager smsManager;
+    private final ConnectionManager connectionManager;
+    private final BroadcastService broadcastService;
+
+    @Inject
+    public CommandsManager(
+            Storage storage, ServerManager serverManager, @Nullable SmsManager smsManager,
+            ConnectionManager connectionManager, BroadcastService broadcastService) {
+        this.storage = storage;
+        this.serverManager = serverManager;
+        this.smsManager = smsManager;
+        this.connectionManager = connectionManager;
+        this.broadcastService = broadcastService;
+        broadcastService.registerListener(this);
     }
 
     public boolean sendCommand(Command command) throws Exception {
         long deviceId = command.getDeviceId();
-        if (command.getId() != 0) {
-            command = getById(command.getId()).clone();
-            command.setDeviceId(deviceId);
-        }
         if (command.getTextChannel()) {
-            Position lastPosition = Context.getIdentityManager().getLastPosition(deviceId);
-            String phone = Context.getIdentityManager().getById(deviceId).getPhone();
-            if (lastPosition != null) {
-                BaseProtocol protocol = Context.getServerManager().getProtocol(lastPosition.getProtocol());
-                protocol.sendTextCommand(phone, command);
+            if (smsManager == null) {
+                throw new RuntimeException("SMS not configured");
+            }
+            Device device = storage.getObject(Device.class, new Request(
+                    new Columns.Include("positionId", "phone"), new Condition.Equals("id", deviceId)));
+            Position position = storage.getObject(Position.class, new Request(
+                    new Columns.All(), new Condition.Equals("id", device.getPositionId())));
+            if (position != null) {
+                BaseProtocol protocol = serverManager.getProtocol(position.getProtocol());
+                protocol.sendTextCommand(device.getPhone(), command);
             } else if (command.getType().equals(Command.TYPE_CUSTOM)) {
-                if (Context.getSmsManager() != null) {
-                    Context.getSmsManager().sendMessageSync(phone, command.getString(Command.KEY_DATA), true);
-                } else {
-                    throw new RuntimeException("SMS is not enabled");
-                }
+                smsManager.sendMessage(device.getPhone(), command.getString(Command.KEY_DATA), true);
             } else {
                 throw new RuntimeException("Command " + command.getType() + " is not supported");
             }
         } else {
-            ActiveDevice activeDevice = Context.getConnectionManager().getActiveDevice(deviceId);
-            if (activeDevice != null) {
-                if (activeDevice.supportsLiveCommands()) {
-                    activeDevice.sendCommand(command);
-                } else {
-                    getDeviceQueue(deviceId).add(command);
-                    return false;
-                }
-            } else if (!queueing) {
-                throw new RuntimeException("Device is not online");
+            DeviceSession deviceSession = connectionManager.getDeviceSession(deviceId);
+            if (deviceSession != null && deviceSession.supportsLiveCommands()) {
+                deviceSession.sendCommand(command);
             } else {
-                getDeviceQueue(deviceId).add(command);
+                storage.addObject(QueuedCommand.fromCommand(command), new Request(new Columns.Exclude("id")));
+                broadcastService.updateCommand(true, deviceId);
                 return false;
             }
         }
         return true;
     }
 
-    public Collection<Long> getSupportedCommands(long deviceId) {
-        List<Long> result = new ArrayList<>();
-        Position lastPosition = Context.getIdentityManager().getLastPosition(deviceId);
-        for (long commandId : getAllDeviceItems(deviceId)) {
-            Command command = getById(commandId);
-            if (lastPosition != null) {
-                BaseProtocol protocol = Context.getServerManager().getProtocol(lastPosition.getProtocol());
-                if (command.getTextChannel() && protocol.getSupportedTextCommands().contains(command.getType())
-                        || !command.getTextChannel()
-                        && protocol.getSupportedDataCommands().contains(command.getType())) {
-                    result.add(commandId);
-                }
-            } else if (command.getType().equals(Command.TYPE_CUSTOM)) {
-                result.add(commandId);
-            }
-        }
-        return result;
-    }
-
-    public Collection<Typed> getCommandTypes(long deviceId, boolean textChannel) {
-        Position lastPosition = Context.getIdentityManager().getLastPosition(deviceId);
-        if (lastPosition != null) {
-            return getCommandTypes(lastPosition.getProtocol(), textChannel);
-        } else {
-            return Collections.singletonList(new Typed(Command.TYPE_CUSTOM));
-        }
-    }
-
-    public Collection<Typed> getCommandTypes(String protocolName, boolean textChannel) {
-        List<Typed> result = new ArrayList<>();
-        BaseProtocol protocol = Context.getServerManager().getProtocol(protocolName);
-        Collection<String> commands;
-        commands = textChannel ? protocol.getSupportedTextCommands() : protocol.getSupportedDataCommands();
-        for (String commandKey : commands) {
-            result.add(new Typed(commandKey));
-        }
-        return result;
-    }
-
-    public Collection<Typed> getAllCommandTypes() {
-        List<Typed> result = new ArrayList<>();
-        Field[] fields = Command.class.getDeclaredFields();
-        for (Field field : fields) {
-            if (Modifier.isStatic(field.getModifiers()) && field.getName().startsWith("TYPE_")) {
-                try {
-                    result.add(new Typed(field.get(null).toString()));
-                } catch (IllegalArgumentException | IllegalAccessException error) {
-                    LOGGER.warn("Get command types error", error);
-                }
-            }
-        }
-        return result;
-    }
-
-    private Queue<Command> getDeviceQueue(long deviceId) {
-        Queue<Command> deviceQueue;
-        try {
-            readLock();
-            deviceQueue = deviceQueues.get(deviceId);
-        } finally {
-            readUnlock();
-        }
-        if (deviceQueue != null) {
-            return deviceQueue;
-        } else {
-            try {
-                writeLock();
-                return deviceQueues.computeIfAbsent(deviceId, key -> new ConcurrentLinkedQueue<>());
-            } finally {
-                writeUnlock();
-            }
-        }
-    }
-
     public Collection<Command> readQueuedCommands(long deviceId) {
         return readQueuedCommands(deviceId, Integer.MAX_VALUE);
     }
 
     public Collection<Command> readQueuedCommands(long deviceId, int count) {
-        Queue<Command> deviceQueue;
         try {
-            readLock();
-            deviceQueue = deviceQueues.get(deviceId);
-        } finally {
-            readUnlock();
+            var commands = storage.getObjects(QueuedCommand.class, new Request(
+                    new Columns.All(),
+                    new Condition.Equals("deviceId", deviceId),
+                    new Order("id", false, count)));
+            for (var command : commands) {
+                storage.removeObject(QueuedCommand.class, new Request(
+                        new Condition.Equals("id", command.getId())));
+            }
+            return commands.stream().map(QueuedCommand::toCommand).collect(Collectors.toList());
+        } catch (StorageException e) {
+            throw new RuntimeException(e);
         }
-        Collection<Command> result = new ArrayList<>();
-        if (deviceQueue != null) {
-            Command command = deviceQueue.poll();
-            while (command != null && result.size() < count) {
-                result.add(command);
-                command = deviceQueue.poll();
+    }
+
+    @Override
+    public void updateCommand(boolean local, long deviceId) {
+        if (!local) {
+            DeviceSession deviceSession = connectionManager.getDeviceSession(deviceId);
+            if (deviceSession != null && deviceSession.supportsLiveCommands()) {
+                for (Command command : readQueuedCommands(deviceId)) {
+                    deviceSession.sendCommand(command);
+                }
             }
         }
-        return result;
     }
 
 }
diff --git a/src/main/java/org/traccar/database/ConnectionManager.java b/src/main/java/org/traccar/database/ConnectionManager.java
deleted file mode 100644
index e12d44612..000000000
--- a/src/main/java/org/traccar/database/ConnectionManager.java
+++ /dev/null
@@ -1,216 +0,0 @@
-/*
- * Copyright 2015 - 2020 Anton Tananaev (anton@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import io.netty.channel.Channel;
-import io.netty.util.Timeout;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.traccar.Context;
-import org.traccar.GlobalTimer;
-import org.traccar.Main;
-import org.traccar.Protocol;
-import org.traccar.config.Keys;
-import org.traccar.handler.events.MotionEventHandler;
-import org.traccar.handler.events.OverspeedEventHandler;
-import org.traccar.model.Device;
-import org.traccar.model.DeviceState;
-import org.traccar.model.Event;
-import org.traccar.model.Position;
-
-import java.net.SocketAddress;
-import java.sql.SQLException;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.TimeUnit;
-
-public class ConnectionManager {
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(ConnectionManager.class);
-
-    private final long deviceTimeout;
-    private final boolean updateDeviceState;
-
-    private final Map<Long, ActiveDevice> activeDevices = new ConcurrentHashMap<>();
-    private final Map<Long, Set<UpdateListener>> listeners = new ConcurrentHashMap<>();
-    private final Map<Long, Timeout> timeouts = new ConcurrentHashMap<>();
-
-    public ConnectionManager() {
-        deviceTimeout = Context.getConfig().getLong(Keys.STATUS_TIMEOUT) * 1000;
-        updateDeviceState = Context.getConfig().getBoolean(Keys.STATUS_UPDATE_DEVICE_STATE);
-    }
-
-    public void addActiveDevice(long deviceId, Protocol protocol, Channel channel, SocketAddress remoteAddress) {
-        activeDevices.put(deviceId, new ActiveDevice(deviceId, protocol, channel, remoteAddress));
-    }
-
-    public void removeActiveDevice(Channel channel) {
-        for (ActiveDevice activeDevice : activeDevices.values()) {
-            if (activeDevice.getChannel() == channel) {
-                updateDevice(activeDevice.getDeviceId(), Device.STATUS_OFFLINE, null);
-                activeDevices.remove(activeDevice.getDeviceId());
-                break;
-            }
-        }
-    }
-
-    public ActiveDevice getActiveDevice(long deviceId) {
-        return activeDevices.get(deviceId);
-    }
-
-    public void updateDevice(final long deviceId, String status, Date time) {
-        Device device = Context.getIdentityManager().getById(deviceId);
-        if (device == null) {
-            return;
-        }
-
-        String oldStatus = device.getStatus();
-        device.setStatus(status);
-
-        if (!status.equals(oldStatus)) {
-            String eventType;
-            Map<Event, Position> events = new HashMap<>();
-            switch (status) {
-                case Device.STATUS_ONLINE:
-                    eventType = Event.TYPE_DEVICE_ONLINE;
-                    break;
-                case Device.STATUS_UNKNOWN:
-                    eventType = Event.TYPE_DEVICE_UNKNOWN;
-                    if (updateDeviceState) {
-                        events.putAll(updateDeviceState(deviceId));
-                    }
-                    break;
-                default:
-                    eventType = Event.TYPE_DEVICE_OFFLINE;
-                    if (updateDeviceState) {
-                        events.putAll(updateDeviceState(deviceId));
-                    }
-                    break;
-            }
-            events.put(new Event(eventType, deviceId), null);
-            Context.getNotificationManager().updateEvents(events);
-        }
-
-        Timeout timeout = timeouts.remove(deviceId);
-        if (timeout != null) {
-            timeout.cancel();
-        }
-
-        if (time != null) {
-            device.setLastUpdate(time);
-        }
-
-        if (status.equals(Device.STATUS_ONLINE)) {
-            timeouts.put(deviceId, GlobalTimer.getTimer().newTimeout(timeout1 -> {
-                if (!timeout1.isCancelled()) {
-                    updateDevice(deviceId, Device.STATUS_UNKNOWN, null);
-                }
-            }, deviceTimeout, TimeUnit.MILLISECONDS));
-        }
-
-        try {
-            Context.getDeviceManager().updateDeviceStatus(device);
-        } catch (SQLException error) {
-            LOGGER.warn("Update device status error", error);
-        }
-
-        updateDevice(device);
-    }
-
-    public Map<Event, Position> updateDeviceState(long deviceId) {
-        DeviceState deviceState = Context.getDeviceManager().getDeviceState(deviceId);
-        Map<Event, Position> result = new HashMap<>();
-
-        Map<Event, Position> event = Main.getInjector()
-                .getInstance(MotionEventHandler.class).updateMotionState(deviceState);
-        if (event != null) {
-            result.putAll(event);
-        }
-
-        event = Main.getInjector().getInstance(OverspeedEventHandler.class)
-                .updateOverspeedState(deviceState, Context.getDeviceManager().
-                        lookupAttributeDouble(deviceId, OverspeedEventHandler.ATTRIBUTE_SPEED_LIMIT, 0, true, false));
-        if (event != null) {
-            result.putAll(event);
-        }
-
-        return result;
-    }
-
-    public synchronized void sendKeepalive() {
-        for (Set<UpdateListener> userListeners : listeners.values()) {
-            for (UpdateListener listener : userListeners) {
-                listener.onKeepalive();
-            }
-        }
-    }
-
-    public synchronized void updateDevice(Device device) {
-        for (long userId : Context.getPermissionsManager().getDeviceUsers(device.getId())) {
-            if (listeners.containsKey(userId)) {
-                for (UpdateListener listener : listeners.get(userId)) {
-                    listener.onUpdateDevice(device);
-                }
-            }
-        }
-    }
-
-    public synchronized void updatePosition(Position position) {
-        long deviceId = position.getDeviceId();
-
-        for (long userId : Context.getPermissionsManager().getDeviceUsers(deviceId)) {
-            if (listeners.containsKey(userId)) {
-                for (UpdateListener listener : listeners.get(userId)) {
-                    listener.onUpdatePosition(position);
-                }
-            }
-        }
-    }
-
-    public synchronized void updateEvent(long userId, Event event) {
-        if (listeners.containsKey(userId)) {
-            for (UpdateListener listener : listeners.get(userId)) {
-                listener.onUpdateEvent(event);
-            }
-        }
-    }
-
-    public interface UpdateListener {
-        void onKeepalive();
-        void onUpdateDevice(Device device);
-        void onUpdatePosition(Position position);
-        void onUpdateEvent(Event event);
-    }
-
-    public synchronized void addListener(long userId, UpdateListener listener) {
-        if (!listeners.containsKey(userId)) {
-            listeners.put(userId, new HashSet<>());
-        }
-        listeners.get(userId).add(listener);
-    }
-
-    public synchronized void removeListener(long userId, UpdateListener listener) {
-        if (!listeners.containsKey(userId)) {
-            listeners.put(userId, new HashSet<>());
-        }
-        listeners.get(userId).remove(listener);
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/DataManager.java b/src/main/java/org/traccar/database/DataManager.java
deleted file mode 100644
index 00c802fde..000000000
--- a/src/main/java/org/traccar/database/DataManager.java
+++ /dev/null
@@ -1,452 +0,0 @@
-/*
- * Copyright 2012 - 2021 Anton Tananaev (anton@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import com.zaxxer.hikari.HikariConfig;
-import com.zaxxer.hikari.HikariDataSource;
-import liquibase.Contexts;
-import liquibase.Liquibase;
-import liquibase.database.Database;
-import liquibase.database.DatabaseFactory;
-import liquibase.exception.LiquibaseException;
-import liquibase.resource.FileSystemResourceAccessor;
-import liquibase.resource.ResourceAccessor;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.traccar.Context;
-import org.traccar.config.Config;
-import org.traccar.config.Keys;
-import org.traccar.model.Attribute;
-import org.traccar.model.BaseModel;
-import org.traccar.model.Calendar;
-import org.traccar.model.Command;
-import org.traccar.model.Device;
-import org.traccar.model.Driver;
-import org.traccar.model.Event;
-import org.traccar.model.Geofence;
-import org.traccar.model.Group;
-import org.traccar.model.Maintenance;
-import org.traccar.model.ManagedUser;
-import org.traccar.model.Notification;
-import org.traccar.model.Order;
-import org.traccar.model.Permission;
-import org.traccar.model.Position;
-import org.traccar.model.Server;
-import org.traccar.model.Statistics;
-import org.traccar.model.User;
-
-import javax.sql.DataSource;
-import java.beans.Introspector;
-import java.io.File;
-import java.lang.reflect.Method;
-import java.net.URL;
-import java.sql.SQLException;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Date;
-import java.util.HashSet;
-import java.util.Set;
-
-public class DataManager {
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(DataManager.class);
-
-    public static final String ACTION_SELECT_ALL = "selectAll";
-    public static final String ACTION_SELECT = "select";
-    public static final String ACTION_INSERT = "insert";
-    public static final String ACTION_UPDATE = "update";
-    public static final String ACTION_DELETE = "delete";
-
-    private final Config config;
-
-    private DataSource dataSource;
-
-    public DataSource getDataSource() {
-        return dataSource;
-    }
-
-    private boolean generateQueries;
-
-    private final boolean forceLdap;
-
-    public DataManager(Config config) throws Exception {
-        this.config = config;
-
-        forceLdap = config.getBoolean(Keys.LDAP_FORCE);
-
-        initDatabase();
-        initDatabaseSchema();
-    }
-
-    private void initDatabase() throws Exception {
-
-        String driverFile = config.getString(Keys.DATABASE_DRIVER_FILE);
-        if (driverFile != null) {
-            ClassLoader classLoader = ClassLoader.getSystemClassLoader();
-            try {
-                Method method = classLoader.getClass().getDeclaredMethod("addURL", URL.class);
-                method.setAccessible(true);
-                method.invoke(classLoader, new File(driverFile).toURI().toURL());
-            } catch (NoSuchMethodException e) {
-                Method method = classLoader.getClass()
-                        .getDeclaredMethod("appendToClassPathForInstrumentation", String.class);
-                method.setAccessible(true);
-                method.invoke(classLoader, driverFile);
-            }
-        }
-
-        String driver = config.getString(Keys.DATABASE_DRIVER);
-        if (driver != null) {
-            Class.forName(driver);
-        }
-
-        HikariConfig hikariConfig = new HikariConfig();
-        hikariConfig.setDriverClassName(driver);
-        hikariConfig.setJdbcUrl(config.getString(Keys.DATABASE_URL));
-        hikariConfig.setUsername(config.getString(Keys.DATABASE_USER));
-        hikariConfig.setPassword(config.getString(Keys.DATABASE_PASSWORD));
-        hikariConfig.setConnectionInitSql(config.getString(Keys.DATABASE_CHECK_CONNECTION));
-        hikariConfig.setIdleTimeout(600000);
-
-        int maxPoolSize = config.getInteger(Keys.DATABASE_MAX_POOL_SIZE);
-        if (maxPoolSize != 0) {
-            hikariConfig.setMaximumPoolSize(maxPoolSize);
-        }
-
-        generateQueries = config.getBoolean(Keys.DATABASE_GENERATE_QUERIES);
-
-        dataSource = new HikariDataSource(hikariConfig);
-    }
-
-    public static String constructObjectQuery(String action, Class<?> clazz, boolean extended) {
-        switch (action) {
-            case ACTION_INSERT:
-            case ACTION_UPDATE:
-                StringBuilder result = new StringBuilder();
-                StringBuilder fields = new StringBuilder();
-                StringBuilder values = new StringBuilder();
-
-                Set<Method> methods = new HashSet<>(Arrays.asList(clazz.getMethods()));
-                methods.removeAll(Arrays.asList(Object.class.getMethods()));
-                methods.removeAll(Arrays.asList(BaseModel.class.getMethods()));
-                for (Method method : methods) {
-                    boolean skip;
-                    if (extended) {
-                        skip = !method.isAnnotationPresent(QueryExtended.class);
-                    } else {
-                        skip = method.isAnnotationPresent(QueryIgnore.class)
-                                || method.isAnnotationPresent(QueryExtended.class) && !action.equals(ACTION_INSERT);
-                    }
-                    if (!skip && method.getName().startsWith("get") && method.getParameterTypes().length == 0) {
-                        String name = Introspector.decapitalize(method.getName().substring(3));
-                        if (action.equals(ACTION_INSERT)) {
-                            fields.append(name).append(", ");
-                            values.append(":").append(name).append(", ");
-                        } else {
-                            fields.append(name).append(" = :").append(name).append(", ");
-                        }
-                    }
-                }
-                fields.setLength(fields.length() - 2);
-                if (action.equals(ACTION_INSERT)) {
-                    values.setLength(values.length() - 2);
-                    result.append("INSERT INTO ").append(getObjectsTableName(clazz)).append(" (");
-                    result.append(fields).append(") ");
-                    result.append("VALUES (").append(values).append(")");
-                } else {
-                    result.append("UPDATE ").append(getObjectsTableName(clazz)).append(" SET ");
-                    result.append(fields);
-                    result.append(" WHERE id = :id");
-                }
-                return result.toString();
-            case ACTION_SELECT_ALL:
-                return "SELECT * FROM " + getObjectsTableName(clazz);
-            case ACTION_SELECT:
-                return "SELECT * FROM " + getObjectsTableName(clazz) + " WHERE id = :id";
-            case ACTION_DELETE:
-                return "DELETE FROM " + getObjectsTableName(clazz) + " WHERE id = :id";
-            default:
-                throw new IllegalArgumentException("Unknown action");
-        }
-    }
-
-    public static String constructPermissionQuery(String action, Class<?> owner, Class<?> property) {
-        switch (action) {
-            case ACTION_SELECT_ALL:
-                return "SELECT " + makeNameId(owner) + ", " + makeNameId(property) + " FROM "
-                        + getPermissionsTableName(owner, property);
-            case ACTION_INSERT:
-                return "INSERT INTO " + getPermissionsTableName(owner, property)
-                        + " (" + makeNameId(owner) + ", " + makeNameId(property) + ") VALUES (:"
-                        + makeNameId(owner) + ", :" + makeNameId(property) + ")";
-            case ACTION_DELETE:
-                return "DELETE FROM " + getPermissionsTableName(owner, property)
-                        + " WHERE " + makeNameId(owner) + " = :" + makeNameId(owner)
-                        + " AND " + makeNameId(property) + " = :" + makeNameId(property);
-            default:
-                throw new IllegalArgumentException("Unknown action");
-        }
-    }
-
-    private String getQuery(String key) {
-        String query = config.getString(key);
-        if (query == null) {
-            LOGGER.info("Query not provided: " + key);
-        }
-        return query;
-    }
-
-    public String getQuery(String action, Class<?> clazz) {
-        return getQuery(action, clazz, false);
-    }
-
-    public String getQuery(String action, Class<?> clazz, boolean extended) {
-        String queryName;
-        if (action.equals(ACTION_SELECT_ALL)) {
-            queryName = "database.select" + clazz.getSimpleName() + "s";
-        } else {
-            queryName = "database." + action.toLowerCase() + clazz.getSimpleName();
-            if (extended) {
-                queryName += "Extended";
-            }
-        }
-        String query = config.getString(queryName);
-        if (query == null) {
-            if (generateQueries) {
-                query = constructObjectQuery(action, clazz, extended);
-            } else {
-                LOGGER.info("Query not provided: " + queryName);
-            }
-        }
-        return query;
-    }
-
-    public String getQuery(String action, Class<?> owner, Class<?> property) {
-        String queryName;
-        switch (action) {
-            case ACTION_SELECT_ALL:
-                queryName = "database.select" + owner.getSimpleName() + property.getSimpleName() + "s";
-                break;
-            case ACTION_INSERT:
-                queryName = "database.link" + owner.getSimpleName() + property.getSimpleName();
-                break;
-            default:
-                queryName = "database.unlink" + owner.getSimpleName() + property.getSimpleName();
-                break;
-        }
-        String query = config.getString(queryName);
-        if (query == null) {
-            if (generateQueries) {
-                query = constructPermissionQuery(
-                        action, owner, property.equals(User.class) ? ManagedUser.class : property);
-            } else {
-                LOGGER.info("Query not provided: " + queryName);
-            }
-        }
-        return query;
-    }
-
-    private static String getPermissionsTableName(Class<?> owner, Class<?> property) {
-        String propertyName = property.getSimpleName();
-        if (propertyName.equals("ManagedUser")) {
-            propertyName = "User";
-        }
-        return "tc_" + Introspector.decapitalize(owner.getSimpleName())
-                + "_" + Introspector.decapitalize(propertyName);
-    }
-
-    private static String getObjectsTableName(Class<?> clazz) {
-        String result = "tc_" + Introspector.decapitalize(clazz.getSimpleName());
-        // Add "s" ending if object name is not plural already
-        if (!result.endsWith("s")) {
-            result += "s";
-        }
-        return result;
-    }
-
-    private void initDatabaseSchema() throws LiquibaseException {
-
-        if (config.hasKey(Keys.DATABASE_CHANGELOG)) {
-
-            ResourceAccessor resourceAccessor = new FileSystemResourceAccessor(new File("."));
-
-            Database database = DatabaseFactory.getInstance().openDatabase(
-                    config.getString(Keys.DATABASE_URL),
-                    config.getString(Keys.DATABASE_USER),
-                    config.getString(Keys.DATABASE_PASSWORD),
-                    config.getString(Keys.DATABASE_DRIVER),
-                    null, null, null, resourceAccessor);
-
-            Liquibase liquibase = new Liquibase(
-                    config.getString(Keys.DATABASE_CHANGELOG), resourceAccessor, database);
-
-            liquibase.clearCheckSums();
-
-            liquibase.update(new Contexts());
-        }
-    }
-
-    public User login(String email, String password) throws SQLException {
-        User user = QueryBuilder.create(dataSource, getQuery("database.loginUser"))
-                .setString("email", email.trim())
-                .executeQuerySingle(User.class);
-        LdapProvider ldapProvider = Context.getLdapProvider();
-        if (user != null) {
-            if (ldapProvider != null && user.getLogin() != null && ldapProvider.login(user.getLogin(), password)
-                    || !forceLdap && user.isPasswordValid(password)) {
-                return user;
-            }
-        } else {
-            if (ldapProvider != null && ldapProvider.login(email, password)) {
-                user = ldapProvider.getUser(email);
-                Context.getUsersManager().addItem(user);
-                return user;
-            }
-        }
-        return null;
-    }
-
-    public void updateDeviceStatus(Device device) throws SQLException {
-        QueryBuilder.create(dataSource, getQuery(ACTION_UPDATE, Device.class, true))
-                .setObject(device)
-                .executeUpdate();
-    }
-
-    public Collection<Position> getPositions(long deviceId, Date from, Date to) throws SQLException {
-        return QueryBuilder.create(dataSource, getQuery("database.selectPositions"))
-                .setLong("deviceId", deviceId)
-                .setDate("from", from)
-                .setDate("to", to)
-                .executeQuery(Position.class);
-    }
-
-    public void updateLatestPosition(Position position) throws SQLException {
-        QueryBuilder.create(dataSource, getQuery("database.updateLatestPosition"))
-                .setDate("now", new Date())
-                .setObject(position)
-                .executeUpdate();
-    }
-
-    public Collection<Position> getLatestPositions() throws SQLException {
-        return QueryBuilder.create(dataSource, getQuery("database.selectLatestPositions"))
-                .executeQuery(Position.class);
-    }
-
-    public Server getServer() throws SQLException {
-        return QueryBuilder.create(dataSource, getQuery(ACTION_SELECT_ALL, Server.class))
-                .executeQuerySingle(Server.class);
-    }
-
-    public Collection<Event> getEvents(long deviceId, Date from, Date to) throws SQLException {
-        return QueryBuilder.create(dataSource, getQuery("database.selectEvents"))
-                .setLong("deviceId", deviceId)
-                .setDate("from", from)
-                .setDate("to", to)
-                .executeQuery(Event.class);
-    }
-
-    public Collection<Statistics> getStatistics(Date from, Date to) throws SQLException {
-        return QueryBuilder.create(dataSource, getQuery("database.selectStatistics"))
-                .setDate("from", from)
-                .setDate("to", to)
-                .executeQuery(Statistics.class);
-    }
-
-    public static Class<?> getClassByName(String name) throws ClassNotFoundException {
-        switch (name.toLowerCase().replace("id", "")) {
-            case "device":
-                return Device.class;
-            case "group":
-                return Group.class;
-            case "user":
-                return User.class;
-            case "manageduser":
-                return ManagedUser.class;
-            case "geofence":
-                return Geofence.class;
-            case "driver":
-                return Driver.class;
-            case "attribute":
-                return Attribute.class;
-            case "calendar":
-                return Calendar.class;
-            case "command":
-                return Command.class;
-            case "maintenance":
-                return Maintenance.class;
-            case "notification":
-                return Notification.class;
-            case "order":
-                return Order.class;
-            default:
-                throw new ClassNotFoundException();
-        }
-    }
-
-    private static String makeNameId(Class<?> clazz) {
-        String name = clazz.getSimpleName();
-        return Introspector.decapitalize(name) + (!name.contains("Id") ? "Id" : "");
-    }
-
-    public Collection<Permission> getPermissions(Class<? extends BaseModel> owner, Class<? extends BaseModel> property)
-            throws SQLException, ClassNotFoundException {
-        return QueryBuilder.create(dataSource, getQuery(ACTION_SELECT_ALL, owner, property))
-                .executePermissionsQuery();
-    }
-
-    public void linkObject(Class<?> owner, long ownerId, Class<?> property, long propertyId, boolean link)
-            throws SQLException {
-        QueryBuilder.create(dataSource, getQuery(link ? ACTION_INSERT : ACTION_DELETE, owner, property))
-                .setLong(makeNameId(owner), ownerId)
-                .setLong(makeNameId(property), propertyId)
-                .executeUpdate();
-    }
-
-    public <T extends BaseModel> T getObject(Class<T> clazz, long entityId) throws SQLException {
-        return QueryBuilder.create(dataSource, getQuery(ACTION_SELECT, clazz))
-                .setLong("id", entityId)
-                .executeQuerySingle(clazz);
-    }
-
-    public <T extends BaseModel> Collection<T> getObjects(Class<T> clazz) throws SQLException {
-        return QueryBuilder.create(dataSource, getQuery(ACTION_SELECT_ALL, clazz))
-                .executeQuery(clazz);
-    }
-
-    public void addObject(BaseModel entity) throws SQLException {
-        entity.setId(QueryBuilder.create(dataSource, getQuery(ACTION_INSERT, entity.getClass()), true)
-                .setObject(entity)
-                .executeUpdate());
-    }
-
-    public void updateObject(BaseModel entity) throws SQLException {
-        QueryBuilder.create(dataSource, getQuery(ACTION_UPDATE, entity.getClass()))
-                .setObject(entity)
-                .executeUpdate();
-        if (entity instanceof User && ((User) entity).getHashedPassword() != null) {
-            QueryBuilder.create(dataSource, getQuery(ACTION_UPDATE, User.class, true))
-                    .setObject(entity)
-                    .executeUpdate();
-        }
-    }
-
-    public void removeObject(Class<? extends BaseModel> clazz, long entityId) throws SQLException {
-        QueryBuilder.create(dataSource, getQuery(ACTION_DELETE, clazz))
-                .setLong("id", entityId)
-                .executeUpdate();
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/DeviceLookupService.java b/src/main/java/org/traccar/database/DeviceLookupService.java
new file mode 100644
index 000000000..583b2ae35
--- /dev/null
+++ b/src/main/java/org/traccar/database/DeviceLookupService.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2022 Anton Tananaev (anton@traccar.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.database;
+
+import io.netty.util.Timeout;
+import io.netty.util.Timer;
+import io.netty.util.TimerTask;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+import org.traccar.model.Device;
+import org.traccar.storage.Storage;
+import org.traccar.storage.StorageException;
+import org.traccar.storage.query.Columns;
+import org.traccar.storage.query.Condition;
+import org.traccar.storage.query.Request;
+
+import javax.inject.Inject;
+import javax.inject.Singleton;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.TimeUnit;
+
+@Singleton
+public class DeviceLookupService {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(DeviceLookupService.class);
+
+    private static final long INFO_TIMEOUT_MS = TimeUnit.MINUTES.toMillis(60);
+    private static final long THROTTLE_MIN_MS = TimeUnit.MINUTES.toMillis(1);
+    private static final long THROTTLE_MAX_MS = TimeUnit.MINUTES.toMillis(30);
+
+    private final Storage storage;
+    private final Timer timer;
+
+    private final boolean throttlingEnabled;
+
+    private static class IdentifierInfo {
+        private long lastQuery;
+        private long delay;
+        private Timeout timeout;
+    }
+
+    private final class IdentifierTask implements TimerTask {
+        private final String uniqueId;
+
+        private IdentifierTask(String uniqueId) {
+            this.uniqueId = uniqueId;
+        }
+
+        @Override
+        public void run(Timeout timeout) {
+            LOGGER.debug("Device lookup expired {}", uniqueId);
+            synchronized (DeviceLookupService.this) {
+                identifierMap.remove(uniqueId);
+            }
+        }
+    }
+
+    private final Map<String, IdentifierInfo> identifierMap = new ConcurrentHashMap<>();
+
+    @Inject
+    public DeviceLookupService(Config config, Storage storage, Timer timer) {
+        this.storage = storage;
+        this.timer = timer;
+        throttlingEnabled = config.getBoolean(Keys.DATABASE_THROTTLE_UNKNOWN);
+    }
+
+    private synchronized boolean isThrottled(String uniqueId) {
+        if (throttlingEnabled) {
+            IdentifierInfo info = identifierMap.get(uniqueId);
+            return info != null && System.currentTimeMillis() < info.lastQuery + info.delay;
+        } else {
+            return false;
+        }
+    }
+
+    private synchronized void lookupSucceeded(String uniqueId) {
+        if (throttlingEnabled) {
+            IdentifierInfo info = identifierMap.remove(uniqueId);
+            if (info != null) {
+                info.timeout.cancel();
+            }
+        }
+    }
+
+    private synchronized void lookupFailed(String uniqueId) {
+        if (throttlingEnabled) {
+            IdentifierInfo info = identifierMap.get(uniqueId);
+            if (info != null) {
+                info.timeout.cancel();
+                info.delay = Math.min(info.delay * 2, THROTTLE_MAX_MS);
+            } else {
+                info = new IdentifierInfo();
+                identifierMap.put(uniqueId, info);
+                info.delay = THROTTLE_MIN_MS;
+            }
+            info.lastQuery = System.currentTimeMillis();
+            info.timeout = timer.newTimeout(new IdentifierTask(uniqueId), INFO_TIMEOUT_MS, TimeUnit.MILLISECONDS);
+            LOGGER.debug("Device lookup {} throttled for {} ms", uniqueId, info.delay);
+        }
+    }
+
+    public Device lookup(String[] uniqueIds) {
+        Device device = null;
+        try {
+            for (String uniqueId : uniqueIds) {
+                if (!isThrottled(uniqueId)) {
+                    device = storage.getObject(Device.class, new Request(
+                            new Columns.All(), new Condition.Equals("uniqueId", uniqueId)));
+                    if (device != null) {
+                        lookupSucceeded(uniqueId);
+                        break;
+                    } else {
+                        lookupFailed(uniqueId);
+                    }
+                } else {
+                    LOGGER.debug("Device lookup throttled {}", uniqueId);
+                }
+            }
+        } catch (StorageException e) {
+            LOGGER.warn("Find device error", e);
+        }
+        return device;
+    }
+
+}
diff --git a/src/main/java/org/traccar/database/DeviceManager.java b/src/main/java/org/traccar/database/DeviceManager.java
deleted file mode 100644
index c8a99274c..000000000
--- a/src/main/java/org/traccar/database/DeviceManager.java
+++ /dev/null
@@ -1,483 +0,0 @@
-/*
- * Copyright 2016 - 2020 Anton Tananaev (anton@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import java.sql.SQLException;
-import java.util.Collection;
-import java.util.HashSet;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.atomic.AtomicLong;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.traccar.config.Config;
-import org.traccar.Context;
-import org.traccar.config.Keys;
-import org.traccar.model.Command;
-import org.traccar.model.Device;
-import org.traccar.model.DeviceState;
-import org.traccar.model.DeviceAccumulators;
-import org.traccar.model.Group;
-import org.traccar.model.Position;
-import org.traccar.model.Server;
-
-public class DeviceManager extends BaseObjectManager<Device> implements IdentityManager, ManagableObjects {
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(DeviceManager.class);
-
-    private final Config config;
-    private final long dataRefreshDelay;
-
-    private Map<String, Device> devicesByUniqueId;
-    private Map<String, Device> devicesByPhone;
-    private final AtomicLong devicesLastUpdate = new AtomicLong();
-
-    private final Map<Long, Position> positions = new ConcurrentHashMap<>();
-
-    private final Map<Long, DeviceState> deviceStates = new ConcurrentHashMap<>();
-
-    public DeviceManager(DataManager dataManager) {
-        super(dataManager, Device.class);
-        this.config = Context.getConfig();
-        try {
-            writeLock();
-            if (devicesByPhone == null) {
-                devicesByPhone = new ConcurrentHashMap<>();
-            }
-            if (devicesByUniqueId == null) {
-                devicesByUniqueId = new ConcurrentHashMap<>();
-            }
-        } finally {
-            writeUnlock();
-        }
-        dataRefreshDelay = config.getLong(Keys.DATABASE_REFRESH_DELAY) * 1000;
-        refreshLastPositions();
-    }
-
-    @Override
-    public long addUnknownDevice(String uniqueId) {
-        Device device = new Device();
-        device.setName(uniqueId);
-        device.setUniqueId(uniqueId);
-        device.setCategory(Context.getConfig().getString(Keys.DATABASE_REGISTER_UNKNOWN_DEFAULT_CATEGORY));
-
-        long defaultGroupId = Context.getConfig().getLong(Keys.DATABASE_REGISTER_UNKNOWN_DEFAULT_GROUP_ID);
-        if (defaultGroupId != 0) {
-            device.setGroupId(defaultGroupId);
-        }
-
-        try {
-            addItem(device);
-
-            LOGGER.info("Automatically registered device " + uniqueId);
-
-            if (defaultGroupId != 0) {
-                Context.getPermissionsManager().refreshDeviceAndGroupPermissions();
-                Context.getPermissionsManager().refreshAllExtendedPermissions();
-            }
-
-            return device.getId();
-        } catch (SQLException e) {
-            LOGGER.warn("Automatic device registration error", e);
-            return 0;
-        }
-    }
-
-    public void updateDeviceCache(boolean force) throws SQLException {
-        long lastUpdate = devicesLastUpdate.get();
-        if ((force || System.currentTimeMillis() - lastUpdate > dataRefreshDelay)
-                && devicesLastUpdate.compareAndSet(lastUpdate, System.currentTimeMillis())) {
-            refreshItems();
-        }
-    }
-
-    @Override
-    public Device getByUniqueId(String uniqueId) throws SQLException {
-        boolean forceUpdate;
-        try {
-            readLock();
-            forceUpdate = !devicesByUniqueId.containsKey(uniqueId) && !config.getBoolean(Keys.DATABASE_IGNORE_UNKNOWN);
-        } finally {
-            readUnlock();
-        }
-        updateDeviceCache(forceUpdate);
-        try {
-            readLock();
-            return devicesByUniqueId.get(uniqueId);
-        } finally {
-            readUnlock();
-        }
-    }
-
-    @Override
-    public String getDevicePassword(long id, String protocol, String defaultPassword) {
-
-        String password = lookupAttributeString(id, Command.KEY_DEVICE_PASSWORD, null, false, false);
-        if (password != null) {
-            return password;
-        }
-
-        if (protocol != null) {
-            password = Context.getConfig().getString(Keys.PROTOCOL_DEVICE_PASSWORD.withPrefix(protocol));
-            if (password != null) {
-                return password;
-            }
-        }
-
-        return defaultPassword;
-    }
-
-    public Device getDeviceByPhone(String phone) {
-        try {
-            readLock();
-            return devicesByPhone.get(phone);
-        } finally {
-            readUnlock();
-        }
-    }
-
-    @Override
-    public Set<Long> getAllItems() {
-        Set<Long> result = super.getAllItems();
-        if (result.isEmpty()) {
-            try {
-                updateDeviceCache(true);
-            } catch (SQLException e) {
-                LOGGER.warn("Update device cache error", e);
-            }
-            result = super.getAllItems();
-        }
-        return result;
-    }
-
-    public Collection<Device> getAllDevices() {
-        return getItems(getAllItems());
-    }
-
-    public Set<Long> getAllUserItems(long userId) {
-        return Context.getPermissionsManager().getDevicePermissions(userId);
-    }
-
-    @Override
-    public Set<Long> getUserItems(long userId) {
-        if (Context.getPermissionsManager() != null) {
-            Set<Long> result = new HashSet<>();
-            for (long deviceId : Context.getPermissionsManager().getDevicePermissions(userId)) {
-                Device device = getById(deviceId);
-                if (device != null && !device.getDisabled()) {
-                    result.add(deviceId);
-                }
-            }
-            return result;
-        } else {
-            return new HashSet<>();
-        }
-    }
-
-    public Set<Long> getAllManagedItems(long userId) {
-        Set<Long> result = new HashSet<>(getAllUserItems(userId));
-        for (long managedUserId : Context.getUsersManager().getUserItems(userId)) {
-            result.addAll(getAllUserItems(managedUserId));
-        }
-        return result;
-    }
-
-    @Override
-    public Set<Long> getManagedItems(long userId) {
-        Set<Long> result = new HashSet<>(getUserItems(userId));
-        for (long managedUserId : Context.getUsersManager().getUserItems(userId)) {
-            result.addAll(getUserItems(managedUserId));
-        }
-        return result;
-    }
-
-    private void addByUniqueId(Device device) {
-        try {
-            writeLock();
-            if (devicesByUniqueId == null) {
-                devicesByUniqueId = new ConcurrentHashMap<>();
-            }
-            devicesByUniqueId.put(device.getUniqueId(), device);
-        } finally {
-            writeUnlock();
-        }
-    }
-
-    private void removeByUniqueId(String deviceUniqueId) {
-        try {
-            writeLock();
-            if (devicesByUniqueId != null) {
-                devicesByUniqueId.remove(deviceUniqueId);
-            }
-        } finally {
-            writeUnlock();
-        }
-    }
-
-    private void addByPhone(Device device) {
-        try {
-            writeLock();
-            if (devicesByPhone == null) {
-                devicesByPhone = new ConcurrentHashMap<>();
-            }
-            devicesByPhone.put(device.getPhone(), device);
-        } finally {
-            writeUnlock();
-        }
-    }
-
-    private void removeByPhone(String phone) {
-        if (phone == null || phone.isEmpty()) {
-            return;
-        }
-        try {
-            writeLock();
-            if (devicesByPhone != null) {
-                devicesByPhone.remove(phone);
-            }
-        } finally {
-            writeUnlock();
-        }
-    }
-
-    @Override
-    protected void addNewItem(Device device) {
-        super.addNewItem(device);
-        addByUniqueId(device);
-        if (device.getPhone() != null  && !device.getPhone().isEmpty()) {
-            addByPhone(device);
-        }
-        if (Context.getGeofenceManager() != null) {
-            Position lastPosition = getLastPosition(device.getId());
-            if (lastPosition != null) {
-                device.setGeofenceIds(Context.getGeofenceManager().getCurrentDeviceGeofences(lastPosition));
-            }
-        }
-    }
-
-    @Override
-    protected void updateCachedItem(Device device) {
-        Device cachedDevice = getById(device.getId());
-        cachedDevice.setName(device.getName());
-        cachedDevice.setGroupId(device.getGroupId());
-        cachedDevice.setCategory(device.getCategory());
-        cachedDevice.setContact(device.getContact());
-        cachedDevice.setModel(device.getModel());
-        cachedDevice.setDisabled(device.getDisabled());
-        cachedDevice.setAttributes(device.getAttributes());
-        if (!device.getUniqueId().equals(cachedDevice.getUniqueId())) {
-            removeByUniqueId(cachedDevice.getUniqueId());
-            cachedDevice.setUniqueId(device.getUniqueId());
-            addByUniqueId(cachedDevice);
-        }
-        if (device.getPhone() != null && !device.getPhone().isEmpty()
-                && !device.getPhone().equals(cachedDevice.getPhone())) {
-            String phone = cachedDevice.getPhone();
-            removeByPhone(phone);
-            cachedDevice.setPhone(device.getPhone());
-            addByPhone(cachedDevice);
-        }
-    }
-
-    @Override
-    protected void removeCachedItem(long deviceId) {
-        Device cachedDevice = getById(deviceId);
-        if (cachedDevice != null) {
-            String deviceUniqueId = cachedDevice.getUniqueId();
-            String phone = cachedDevice.getPhone();
-            super.removeCachedItem(deviceId);
-            removeByUniqueId(deviceUniqueId);
-            removeByPhone(phone);
-        }
-        positions.remove(deviceId);
-    }
-
-    public void updateDeviceStatus(Device device) throws SQLException {
-        getDataManager().updateDeviceStatus(device);
-        Device cachedDevice = getById(device.getId());
-        if (cachedDevice != null) {
-            cachedDevice.setStatus(device.getStatus());
-        }
-    }
-
-    private void refreshLastPositions() {
-        if (getDataManager() != null) {
-            try {
-                for (Position position : getDataManager().getLatestPositions()) {
-                    positions.put(position.getDeviceId(), position);
-                }
-            } catch (SQLException error) {
-                LOGGER.warn("Load latest positions error", error);
-            }
-        }
-    }
-
-    public boolean isLatestPosition(Position position) {
-        Position lastPosition = getLastPosition(position.getDeviceId());
-        return lastPosition == null || position.getFixTime().compareTo(lastPosition.getFixTime()) >= 0;
-    }
-
-    public void updateLatestPosition(Position position) throws SQLException {
-
-        if (isLatestPosition(position)) {
-
-            getDataManager().updateLatestPosition(position);
-
-            Device device = getById(position.getDeviceId());
-            if (device != null) {
-                device.setPositionId(position.getId());
-            }
-
-            positions.put(position.getDeviceId(), position);
-
-            if (Context.getConnectionManager() != null) {
-                Context.getConnectionManager().updatePosition(position);
-            }
-        }
-    }
-
-    @Override
-    public Position getLastPosition(long deviceId) {
-        return positions.get(deviceId);
-    }
-
-    public Collection<Position> getInitialState(long userId) {
-
-        List<Position> result = new LinkedList<>();
-
-        if (Context.getPermissionsManager() != null) {
-            for (long deviceId : Context.getPermissionsManager().getUserAdmin(userId)
-                    ? getAllUserItems(userId) : getUserItems(userId)) {
-                if (positions.containsKey(deviceId)) {
-                    result.add(positions.get(deviceId));
-                }
-            }
-        }
-
-        return result;
-    }
-
-    @Override
-    public boolean lookupAttributeBoolean(
-            long deviceId, String attributeName, boolean defaultValue, boolean lookupServer, boolean lookupConfig) {
-        Object result = lookupAttribute(deviceId, attributeName, lookupServer, lookupConfig);
-        if (result != null) {
-            return result instanceof String ? Boolean.parseBoolean((String) result) : (Boolean) result;
-        }
-        return defaultValue;
-    }
-
-    @Override
-    public String lookupAttributeString(
-            long deviceId, String attributeName, String defaultValue, boolean lookupServer, boolean lookupConfig) {
-        Object result = lookupAttribute(deviceId, attributeName, lookupServer, lookupConfig);
-        return result != null ? (String) result : defaultValue;
-    }
-
-    @Override
-    public int lookupAttributeInteger(
-            long deviceId, String attributeName, int defaultValue, boolean lookupServer, boolean lookupConfig) {
-        Object result = lookupAttribute(deviceId, attributeName, lookupServer, lookupConfig);
-        if (result != null) {
-            return result instanceof String ? Integer.parseInt((String) result) : ((Number) result).intValue();
-        }
-        return defaultValue;
-    }
-
-    @Override
-    public long lookupAttributeLong(
-            long deviceId, String attributeName, long defaultValue, boolean lookupServer, boolean lookupConfig) {
-        Object result = lookupAttribute(deviceId, attributeName, lookupServer, lookupConfig);
-        if (result != null) {
-            return result instanceof String ? Long.parseLong((String) result) : ((Number) result).longValue();
-        }
-        return defaultValue;
-    }
-
-    public double lookupAttributeDouble(
-            long deviceId, String attributeName, double defaultValue, boolean lookupServer, boolean lookupConfig) {
-        Object result = lookupAttribute(deviceId, attributeName, lookupServer, lookupConfig);
-        if (result != null) {
-            return result instanceof String ? Double.parseDouble((String) result) : ((Number) result).doubleValue();
-        }
-        return defaultValue;
-    }
-
-    private Object lookupAttribute(long deviceId, String attributeName, boolean lookupServer, boolean lookupConfig) {
-        Object result = null;
-        Device device = getById(deviceId);
-        if (device != null) {
-            result = device.getAttributes().get(attributeName);
-            if (result == null) {
-                long groupId = device.getGroupId();
-                while (groupId != 0) {
-                    Group group = Context.getGroupsManager().getById(groupId);
-                    if (group != null) {
-                        result = group.getAttributes().get(attributeName);
-                        if (result != null) {
-                            break;
-                        }
-                        groupId = group.getGroupId();
-                    } else {
-                        groupId = 0;
-                    }
-                }
-            }
-            if (result == null && lookupServer) {
-                Server server = Context.getPermissionsManager().getServer();
-                result = server.getAttributes().get(attributeName);
-            }
-            if (result == null && lookupConfig) {
-                result = Context.getConfig().getString(attributeName);
-            }
-        }
-        return result;
-    }
-
-    public void resetDeviceAccumulators(DeviceAccumulators deviceAccumulators) throws SQLException {
-        Position last = positions.get(deviceAccumulators.getDeviceId());
-        if (last != null) {
-            if (deviceAccumulators.getTotalDistance() != null) {
-                last.getAttributes().put(Position.KEY_TOTAL_DISTANCE, deviceAccumulators.getTotalDistance());
-            }
-            if (deviceAccumulators.getHours() != null) {
-                last.getAttributes().put(Position.KEY_HOURS, deviceAccumulators.getHours());
-            }
-            getDataManager().addObject(last);
-            updateLatestPosition(last);
-        } else {
-            throw new IllegalArgumentException();
-        }
-    }
-
-    public DeviceState getDeviceState(long deviceId) {
-        DeviceState deviceState = deviceStates.get(deviceId);
-        if (deviceState == null) {
-            deviceState = new DeviceState();
-            deviceStates.put(deviceId, deviceState);
-        }
-        return deviceState;
-    }
-
-    public void setDeviceState(long deviceId, DeviceState deviceState) {
-        deviceStates.put(deviceId, deviceState);
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/DriversManager.java b/src/main/java/org/traccar/database/DriversManager.java
deleted file mode 100644
index d111cd643..000000000
--- a/src/main/java/org/traccar/database/DriversManager.java
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * Copyright 2017 - 2020 Anton Tananaev (anton@traccar.org)
- * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
-
-import org.traccar.model.Driver;
-
-public class DriversManager extends ExtendedObjectManager<Driver> {
-
-    private Map<String, Driver> driversByUniqueId;
-
-    public DriversManager(DataManager dataManager) {
-        super(dataManager, Driver.class);
-        try {
-            writeLock();
-            if (driversByUniqueId == null) {
-                driversByUniqueId = new ConcurrentHashMap<>();
-            }
-        } finally {
-            writeUnlock();
-        }
-    }
-
-    private void addByUniqueId(Driver driver) {
-        try {
-            writeLock();
-            if (driversByUniqueId == null) {
-                driversByUniqueId = new ConcurrentHashMap<>();
-            }
-            driversByUniqueId.put(driver.getUniqueId(), driver);
-        } finally {
-            writeUnlock();
-        }
-    }
-
-    private void removeByUniqueId(String driverUniqueId) {
-        try {
-            writeLock();
-            if (driversByUniqueId == null) {
-                driversByUniqueId = new ConcurrentHashMap<>();
-            }
-            driversByUniqueId.remove(driverUniqueId);
-        } finally {
-            writeUnlock();
-        }
-    }
-
-    @Override
-    protected void addNewItem(Driver driver) {
-        super.addNewItem(driver);
-        addByUniqueId(driver);
-    }
-
-    @Override
-    protected void updateCachedItem(Driver driver) {
-        Driver cachedDriver = getById(driver.getId());
-        cachedDriver.setName(driver.getName());
-        if (!driver.getUniqueId().equals(cachedDriver.getUniqueId())) {
-            removeByUniqueId(cachedDriver.getUniqueId());
-            cachedDriver.setUniqueId(driver.getUniqueId());
-            addByUniqueId(cachedDriver);
-        }
-        cachedDriver.setAttributes(driver.getAttributes());
-    }
-
-    @Override
-    protected void removeCachedItem(long driverId) {
-        Driver cachedDriver = getById(driverId);
-        if (cachedDriver != null) {
-            String driverUniqueId = cachedDriver.getUniqueId();
-            super.removeCachedItem(driverId);
-            removeByUniqueId(driverUniqueId);
-        }
-    }
-
-    public Driver getDriverByUniqueId(String uniqueId) {
-        try {
-            readLock();
-            return driversByUniqueId.get(uniqueId);
-        } finally {
-            readUnlock();
-        }
-    }
-}
diff --git a/src/main/java/org/traccar/database/ExtendedObjectManager.java b/src/main/java/org/traccar/database/ExtendedObjectManager.java
deleted file mode 100644
index 93e5820fb..000000000
--- a/src/main/java/org/traccar/database/ExtendedObjectManager.java
+++ /dev/null
@@ -1,143 +0,0 @@
-/*
- * Copyright 2017 - 2020 Anton Tananaev (anton@traccar.org)
- * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import java.sql.SQLException;
-import java.util.Collection;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.traccar.Context;
-import org.traccar.model.Device;
-import org.traccar.model.Group;
-import org.traccar.model.Permission;
-import org.traccar.model.BaseModel;
-
-public abstract class ExtendedObjectManager<T extends BaseModel> extends SimpleObjectManager<T> {
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(ExtendedObjectManager.class);
-
-    private final Map<Long, Set<Long>> deviceItems = new ConcurrentHashMap<>();
-    private final Map<Long, Set<Long>> deviceItemsWithGroups = new ConcurrentHashMap<>();
-    private final Map<Long, Set<Long>> groupItems = new ConcurrentHashMap<>();
-
-    protected ExtendedObjectManager(DataManager dataManager, Class<T> baseClass) {
-        super(dataManager, baseClass);
-        refreshExtendedPermissions();
-    }
-
-    public final Set<Long> getGroupItems(long groupId) {
-        try {
-            readLock();
-            Set<Long> result = groupItems.get(groupId);
-            if (result != null) {
-                return new HashSet<>(result);
-            } else {
-                return new HashSet<>();
-            }
-        } finally {
-            readUnlock();
-        }
-    }
-
-    public final Set<Long> getDeviceItems(long deviceId) {
-        try {
-            readLock();
-            Set<Long> result = deviceItems.get(deviceId);
-            if (result != null) {
-                return new HashSet<>(result);
-            } else {
-                return new HashSet<>();
-            }
-        } finally {
-            readUnlock();
-        }
-    }
-
-    public Set<Long> getAllDeviceItems(long deviceId) {
-        try {
-            readLock();
-            Set<Long> result = deviceItemsWithGroups.get(deviceId);
-            if (result != null) {
-                return new HashSet<>(result);
-            } else {
-                return new HashSet<>();
-            }
-        } finally {
-            readUnlock();
-        }
-    }
-
-    @Override
-    public void removeItem(long itemId) throws SQLException {
-        super.removeItem(itemId);
-        refreshExtendedPermissions();
-    }
-
-    public void refreshExtendedPermissions() {
-        if (getDataManager() != null) {
-            try {
-                Collection<Permission> databaseGroupPermissions =
-                        getDataManager().getPermissions(Group.class, getBaseClass());
-
-                Collection<Permission> databaseDevicePermissions =
-                        getDataManager().getPermissions(Device.class, getBaseClass());
-
-                writeLock();
-
-                groupItems.clear();
-                deviceItems.clear();
-                deviceItemsWithGroups.clear();
-
-                for (Permission groupPermission : databaseGroupPermissions) {
-                    groupItems
-                            .computeIfAbsent(groupPermission.getOwnerId(), key -> new HashSet<>())
-                            .add(groupPermission.getPropertyId());
-                }
-
-                for (Permission devicePermission : databaseDevicePermissions) {
-                    deviceItems
-                            .computeIfAbsent(devicePermission.getOwnerId(), key -> new HashSet<>())
-                            .add(devicePermission.getPropertyId());
-                    deviceItemsWithGroups
-                            .computeIfAbsent(devicePermission.getOwnerId(), key -> new HashSet<>())
-                            .add(devicePermission.getPropertyId());
-                }
-
-                for (Device device : Context.getDeviceManager().getAllDevices()) {
-                    long groupId = device.getGroupId();
-                    while (groupId > 0) {
-                        deviceItemsWithGroups
-                                .computeIfAbsent(device.getId(), key -> new HashSet<>())
-                                .addAll(groupItems.getOrDefault(groupId, new HashSet<>()));
-                        Group group = Context.getGroupsManager().getById(groupId);
-                        groupId = group != null ? group.getGroupId() : 0;
-                    }
-                }
-
-            } catch (SQLException | ClassNotFoundException error) {
-                LOGGER.warn("Refresh permissions error", error);
-            } finally {
-                writeUnlock();
-            }
-        }
-    }
-}
diff --git a/src/main/java/org/traccar/database/GeofenceManager.java b/src/main/java/org/traccar/database/GeofenceManager.java
deleted file mode 100644
index a32847cf9..000000000
--- a/src/main/java/org/traccar/database/GeofenceManager.java
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Copyright 2016 - 2017 Anton Tananaev (anton@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import org.traccar.Context;
-import org.traccar.model.Device;
-import org.traccar.model.Geofence;
-import org.traccar.model.Position;
-
-public class GeofenceManager extends ExtendedObjectManager<Geofence> {
-
-    public GeofenceManager(DataManager dataManager) {
-        super(dataManager, Geofence.class);
-    }
-
-    @Override
-    public final void refreshExtendedPermissions() {
-        super.refreshExtendedPermissions();
-        recalculateDevicesGeofences();
-    }
-
-    public List<Long> getCurrentDeviceGeofences(Position position) {
-        List<Long> result = new ArrayList<>();
-        for (long geofenceId : getAllDeviceItems(position.getDeviceId())) {
-            Geofence geofence = getById(geofenceId);
-            if (geofence != null && geofence.getGeometry()
-                    .containsPoint(position.getLatitude(), position.getLongitude())) {
-                result.add(geofenceId);
-            }
-        }
-        return result;
-    }
-
-    public void recalculateDevicesGeofences() {
-        for (Device device : Context.getDeviceManager().getAllDevices()) {
-            List<Long> deviceGeofenceIds = device.getGeofenceIds();
-            if (deviceGeofenceIds == null) {
-                deviceGeofenceIds = new ArrayList<>();
-            } else {
-                deviceGeofenceIds.clear();
-            }
-            Position lastPosition = Context.getIdentityManager().getLastPosition(device.getId());
-            if (lastPosition != null && getAllDeviceItems(device.getId()) != null) {
-                deviceGeofenceIds.addAll(getCurrentDeviceGeofences(lastPosition));
-            }
-            device.setGeofenceIds(deviceGeofenceIds);
-        }
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/GroupsManager.java b/src/main/java/org/traccar/database/GroupsManager.java
deleted file mode 100644
index c35f35f93..000000000
--- a/src/main/java/org/traccar/database/GroupsManager.java
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * Copyright 2017 - 2020 Anton Tananaev (anton@traccar.org)
- * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import java.sql.SQLException;
-import java.util.HashSet;
-import java.util.Set;
-
-import org.traccar.Context;
-import org.traccar.model.Group;
-
-public class GroupsManager extends BaseObjectManager<Group> implements ManagableObjects {
-
-    public GroupsManager(DataManager dataManager) {
-        super(dataManager, Group.class);
-    }
-
-    private void checkGroupCycles(Group group) {
-        Set<Long> groups = new HashSet<>();
-        while (group != null) {
-            if (groups.contains(group.getId())) {
-                throw new IllegalArgumentException("Cycle in group hierarchy");
-            }
-            groups.add(group.getId());
-            group = getById(group.getGroupId());
-        }
-    }
-
-    @Override
-    public Set<Long> getAllItems() {
-        Set<Long> result = super.getAllItems();
-        if (result.isEmpty()) {
-            refreshItems();
-            result = super.getAllItems();
-        }
-        return result;
-    }
-
-    @Override
-    protected void addNewItem(Group group) {
-        checkGroupCycles(group);
-        super.addNewItem(group);
-    }
-
-    @Override
-    public void updateItem(Group group) throws SQLException {
-        checkGroupCycles(group);
-        super.updateItem(group);
-    }
-
-    @Override
-    public Set<Long> getUserItems(long userId) {
-        if (Context.getPermissionsManager() != null) {
-            return Context.getPermissionsManager().getGroupPermissions(userId);
-        } else {
-            return new HashSet<>();
-        }
-    }
-
-    @Override
-    public Set<Long> getManagedItems(long userId) {
-        Set<Long> result = getUserItems(userId);
-        for (long managedUserId : Context.getUsersManager().getUserItems(userId)) {
-            result.addAll(getUserItems(managedUserId));
-        }
-        return result;
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/IdentityManager.java b/src/main/java/org/traccar/database/IdentityManager.java
deleted file mode 100644
index af6a6ce71..000000000
--- a/src/main/java/org/traccar/database/IdentityManager.java
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Copyright 2015 - 2019 Anton Tananaev (anton@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import org.traccar.model.Device;
-import org.traccar.model.Position;
-
-public interface IdentityManager {
-
-    long addUnknownDevice(String uniqueId);
-
-    Device getById(long id);
-
-    Device getByUniqueId(String uniqueId) throws Exception;
-
-    String getDevicePassword(long id, String protocol, String defaultPassword);
-
-    Position getLastPosition(long deviceId);
-
-    boolean isLatestPosition(Position position);
-
-    boolean lookupAttributeBoolean(
-            long deviceId, String attributeName, boolean defaultValue, boolean lookupServer, boolean lookupConfig);
-
-    String lookupAttributeString(
-            long deviceId, String attributeName, String defaultValue, boolean lookupServer, boolean lookupConfig);
-
-    int lookupAttributeInteger(
-            long deviceId, String attributeName, int defaultValue, boolean lookupServer, boolean lookupConfig);
-
-    long lookupAttributeLong(
-            long deviceId, String attributeName, long defaultValue, boolean lookupServer, boolean lookupConfig);
-
-    double lookupAttributeDouble(
-            long deviceId, String attributeName, double defaultValue, boolean lookupServer, boolean lookupConfig);
-
-}
diff --git a/src/main/java/org/traccar/database/LdapProvider.java b/src/main/java/org/traccar/database/LdapProvider.java
index d659a11a1..d517294b8 100644
--- a/src/main/java/org/traccar/database/LdapProvider.java
+++ b/src/main/java/org/traccar/database/LdapProvider.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 - 2020 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 - 2022 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/src/main/java/org/traccar/database/MailManager.java b/src/main/java/org/traccar/database/MailManager.java
deleted file mode 100644
index d94f55cda..000000000
--- a/src/main/java/org/traccar/database/MailManager.java
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * Copyright 2016 - 2021 Anton Tananaev (anton@traccar.org)
- * Copyright 2017 - 2018 Andrey Kunitsyn (andrey@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.traccar.Context;
-import org.traccar.Main;
-import org.traccar.model.User;
-import org.traccar.notification.PropertiesProvider;
-
-import javax.mail.BodyPart;
-import javax.mail.Message;
-import javax.mail.MessagingException;
-import javax.mail.Multipart;
-import javax.mail.Session;
-import javax.mail.Transport;
-import javax.mail.internet.InternetAddress;
-import javax.mail.internet.MimeBodyPart;
-import javax.mail.internet.MimeMessage;
-import javax.mail.internet.MimeMultipart;
-import java.util.Date;
-import java.util.Properties;
-
-public final class MailManager {
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(MailManager.class);
-
-    private static Properties getProperties(PropertiesProvider provider) {
-        Properties properties = new Properties();
-        String host = provider.getString("mail.smtp.host");
-        if (host != null) {
-            properties.put("mail.transport.protocol", provider.getString("mail.transport.protocol", "smtp"));
-            properties.put("mail.smtp.host", host);
-            properties.put("mail.smtp.port", String.valueOf(provider.getInteger("mail.smtp.port", 25)));
-
-            Boolean starttlsEnable = provider.getBoolean("mail.smtp.starttls.enable");
-            if (starttlsEnable != null) {
-                properties.put("mail.smtp.starttls.enable", String.valueOf(starttlsEnable));
-            }
-            Boolean starttlsRequired = provider.getBoolean("mail.smtp.starttls.required");
-            if (starttlsRequired != null) {
-                properties.put("mail.smtp.starttls.required", String.valueOf(starttlsRequired));
-            }
-
-            Boolean sslEnable = provider.getBoolean("mail.smtp.ssl.enable");
-            if (sslEnable != null) {
-                properties.put("mail.smtp.ssl.enable", String.valueOf(sslEnable));
-            }
-            String sslTrust = provider.getString("mail.smtp.ssl.trust");
-            if (sslTrust != null) {
-                properties.put("mail.smtp.ssl.trust", sslTrust);
-            }
-
-            String sslProtocols = provider.getString("mail.smtp.ssl.protocols");
-            if (sslProtocols != null) {
-                properties.put("mail.smtp.ssl.protocols", sslProtocols);
-            }
-
-            String username = provider.getString("mail.smtp.username");
-            if (username != null) {
-                properties.put("mail.smtp.username", username);
-            }
-            String password = provider.getString("mail.smtp.password");
-            if (password != null) {
-                properties.put("mail.smtp.password", password);
-            }
-            String from = provider.getString("mail.smtp.from");
-            if (from != null) {
-                properties.put("mail.smtp.from", from);
-            }
-        }
-        return properties;
-    }
-
-    public boolean getEmailEnabled() {
-        return Context.getConfig().hasKey("mail.smtp.host");
-    }
-
-    public void sendMessage(
-            long userId, String subject, String body) throws MessagingException {
-        sendMessage(userId, subject, body, null);
-    }
-
-    public void sendMessage(
-            long userId, String subject, String body, MimeBodyPart attachment) throws MessagingException {
-        User user = Context.getPermissionsManager().getUser(userId);
-
-        Properties properties = null;
-        if (!Context.getConfig().getBoolean("mail.smtp.ignoreUserConfig")) {
-            properties = getProperties(new PropertiesProvider(user));
-        }
-        if (properties == null || !properties.containsKey("mail.smtp.host")) {
-            properties = getProperties(new PropertiesProvider(Context.getConfig()));
-        }
-        if (!properties.containsKey("mail.smtp.host")) {
-            LOGGER.warn("No SMTP configuration found");
-            return;
-        }
-
-        Session session = Session.getInstance(properties);
-
-        MimeMessage message = new MimeMessage(session);
-
-        String from = properties.getProperty("mail.smtp.from");
-        if (from != null) {
-            message.setFrom(new InternetAddress(from));
-        }
-
-        message.addRecipient(Message.RecipientType.TO, new InternetAddress(user.getEmail()));
-        message.setSubject(subject);
-        message.setSentDate(new Date());
-
-        if (attachment != null) {
-            Multipart multipart = new MimeMultipart();
-
-            BodyPart messageBodyPart = new MimeBodyPart();
-            messageBodyPart.setContent(body, "text/html; charset=utf-8");
-            multipart.addBodyPart(messageBodyPart);
-            multipart.addBodyPart(attachment);
-
-            message.setContent(multipart);
-        } else {
-            message.setContent(body, "text/html; charset=utf-8");
-        }
-
-        try (Transport transport = session.getTransport()) {
-            Main.getInjector().getInstance(StatisticsManager.class).registerMail();
-            transport.connect(
-                    properties.getProperty("mail.smtp.host"),
-                    properties.getProperty("mail.smtp.username"),
-                    properties.getProperty("mail.smtp.password"));
-            transport.sendMessage(message, message.getAllRecipients());
-        }
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/MaintenancesManager.java b/src/main/java/org/traccar/database/MaintenancesManager.java
deleted file mode 100644
index 4e266cb78..000000000
--- a/src/main/java/org/traccar/database/MaintenancesManager.java
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Copyright 2018 Anton Tananaev (anton@traccar.org)
- * Copyright 2018 Andrey Kunitsyn (andrey@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import org.traccar.model.Maintenance;
-
-public class MaintenancesManager extends ExtendedObjectManager<Maintenance> {
-
-    public MaintenancesManager(DataManager dataManager) {
-        super(dataManager, Maintenance.class);
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/ManagableObjects.java b/src/main/java/org/traccar/database/ManagableObjects.java
deleted file mode 100644
index ec9549493..000000000
--- a/src/main/java/org/traccar/database/ManagableObjects.java
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Copyright 2017 Anton Tananaev (anton@traccar.org)
- * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import java.util.Set;
-
-public interface ManagableObjects {
-
-    Set<Long> getUserItems(long userId);
-
-    Set<Long> getManagedItems(long userId);
-
-}
diff --git a/src/main/java/org/traccar/database/MediaManager.java b/src/main/java/org/traccar/database/MediaManager.java
index edade5766..c1ef810ee 100644
--- a/src/main/java/org/traccar/database/MediaManager.java
+++ b/src/main/java/org/traccar/database/MediaManager.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2017 - 2022 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,10 +18,15 @@ package org.traccar.database;
 import io.netty.buffer.ByteBuf;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
 
+import javax.inject.Inject;
+import javax.inject.Singleton;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.OutputStream;
 import java.nio.ByteBuffer;
 import java.nio.channels.FileChannel;
 import java.nio.file.Files;
@@ -30,14 +35,16 @@ import java.nio.file.Paths;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 
+@Singleton
 public class MediaManager {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(MediaManager.class);
 
-    private String path;
+    private final String path;
 
-    public MediaManager(String path) {
-        this.path = path;
+    @Inject
+    public MediaManager(Config config) {
+        this.path = config.getString(Keys.MEDIA_PATH);
     }
 
     private File createFile(String uniqueId, String name) throws IOException {
@@ -49,6 +56,10 @@ public class MediaManager {
         return filePath.toFile();
     }
 
+    public OutputStream createFileStream(String uniqueId, String name, String extension) throws IOException {
+        return new FileOutputStream(createFile(uniqueId, name + "." + extension));
+    }
+
     public String writeFile(String uniqueId, ByteBuf buf, String extension) {
         if (path != null) {
             int size = buf.readableBytes();
diff --git a/src/main/java/org/traccar/database/NotificationManager.java b/src/main/java/org/traccar/database/NotificationManager.java
index 9f9a83cd2..cb971b082 100644
--- a/src/main/java/org/traccar/database/NotificationManager.java
+++ b/src/main/java/org/traccar/database/NotificationManager.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 - 2021 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2022 Anton Tananaev (anton@traccar.org)
  * Copyright 2016 - 2018 Andrey Kunitsyn (andrey@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -16,128 +16,141 @@
  */
 package org.traccar.database;
 
-import java.lang.reflect.Field;
-import java.lang.reflect.Modifier;
-import java.sql.SQLException;
-import java.util.Arrays;
-import java.util.Date;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Set;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.traccar.Context;
+import org.traccar.config.Config;
 import org.traccar.config.Keys;
+import org.traccar.forward.EventData;
+import org.traccar.forward.EventForwarder;
+import org.traccar.geocoder.Geocoder;
 import org.traccar.model.Calendar;
+import org.traccar.model.Device;
 import org.traccar.model.Event;
+import org.traccar.model.Geofence;
+import org.traccar.model.Maintenance;
 import org.traccar.model.Notification;
 import org.traccar.model.Position;
-import org.traccar.model.Typed;
+import org.traccar.notification.MessageException;
+import org.traccar.notification.NotificatorManager;
+import org.traccar.session.cache.CacheManager;
+import org.traccar.storage.Storage;
+import org.traccar.storage.StorageException;
+import org.traccar.storage.query.Columns;
+import org.traccar.storage.query.Request;
+
+import javax.annotation.Nullable;
+import javax.inject.Inject;
+import javax.inject.Singleton;
+import java.util.Arrays;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.stream.Collectors;
 
-public class NotificationManager extends ExtendedObjectManager<Notification> {
+@Singleton
+public class NotificationManager {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(NotificationManager.class);
 
-    private final boolean geocodeOnRequest;
+    private final Storage storage;
+    private final CacheManager cacheManager;
+    private final EventForwarder eventForwarder;
+    private final NotificatorManager notificatorManager;
+    private final Geocoder geocoder;
 
-    public NotificationManager(DataManager dataManager) {
-        super(dataManager, Notification.class);
-        geocodeOnRequest = Context.getConfig().getBoolean(Keys.GEOCODER_ON_REQUEST);
-    }
+    private final boolean geocodeOnRequest;
 
-    private Set<Long> getEffectiveNotifications(long userId, long deviceId, Date time) {
-        Set<Long> result = new HashSet<>();
-        Set<Long> deviceNotifications = getAllDeviceItems(deviceId);
-        for (long itemId : getUserItems(userId)) {
-            if (getById(itemId).getAlways() || deviceNotifications.contains(itemId)) {
-                long calendarId = getById(itemId).getCalendarId();
-                Calendar calendar = calendarId != 0 ? Context.getCalendarManager().getById(calendarId) : null;
-                if (calendar == null || calendar.checkMoment(time)) {
-                    result.add(itemId);
-                }
-            }
-        }
-        return result;
+    @Inject
+    public NotificationManager(
+            Config config, Storage storage, CacheManager cacheManager, @Nullable EventForwarder eventForwarder,
+            NotificatorManager notificatorManager, @Nullable Geocoder geocoder) {
+        this.storage = storage;
+        this.cacheManager = cacheManager;
+        this.eventForwarder = eventForwarder;
+        this.notificatorManager = notificatorManager;
+        this.geocoder = geocoder;
+        geocodeOnRequest = config.getBoolean(Keys.GEOCODER_ON_REQUEST);
     }
 
-    public void updateEvent(Event event, Position position) {
+    private void updateEvent(Event event, Position position) {
         try {
-            getDataManager().addObject(event);
-        } catch (SQLException error) {
+            event.setId(storage.addObject(event, new Request(new Columns.Exclude("id"))));
+        } catch (StorageException error) {
             LOGGER.warn("Event save error", error);
         }
 
-        long deviceId = event.getDeviceId();
-        Set<Long> users = Context.getPermissionsManager().getDeviceUsers(deviceId);
-        Set<Long> usersToForward = null;
-        if (Context.getEventForwarder() != null) {
-            usersToForward = new HashSet<>();
-        }
-        for (long userId : users) {
-            if ((event.getGeofenceId() == 0
-                    || Context.getGeofenceManager().checkItemPermission(userId, event.getGeofenceId()))
-                    && (event.getMaintenanceId() == 0
-                    || Context.getMaintenancesManager().checkItemPermission(userId, event.getMaintenanceId()))) {
-                if (usersToForward != null) {
-                    usersToForward.add(userId);
-                }
-                final Set<String> notificators = new HashSet<>();
-                for (long notificationId : getEffectiveNotifications(userId, deviceId, event.getEventTime())) {
-                    Notification notification = getById(notificationId);
-                    if (getById(notificationId).getType().equals(event.getType())) {
-                        boolean filter = false;
-                        if (event.getType().equals(Event.TYPE_ALARM)) {
-                            String alarmsAttribute = notification.getString("alarms");
-                            if (alarmsAttribute == null) {
-                                filter = true;
-                            } else {
-                                List<String> alarms = Arrays.asList(alarmsAttribute.split(","));
-                                filter = !alarms.contains(event.getString(Position.KEY_ALARM));
-                            }
-                        }
-                        if (!filter) {
-                            notificators.addAll(notification.getNotificatorsTypes());
+        var notifications = cacheManager.getDeviceObjects(event.getDeviceId(), Notification.class).stream()
+                .filter(notification -> notification.getType().equals(event.getType()))
+                .filter(notification -> {
+                    if (event.getType().equals(Event.TYPE_ALARM)) {
+                        String alarmsAttribute = notification.getString("alarms");
+                        if (alarmsAttribute != null) {
+                            return Arrays.asList(alarmsAttribute.split(","))
+                                    .contains(event.getString(Position.KEY_ALARM));
                         }
+                        return false;
                     }
-                }
-
-                if (position != null && position.getAddress() == null
-                        && geocodeOnRequest && Context.getGeocoder() != null) {
-                    position.setAddress(Context.getGeocoder()
-                            .getAddress(position.getLatitude(), position.getLongitude(), null));
-                }
+                    return true;
+                })
+                .filter(notification -> {
+                    long calendarId = notification.getCalendarId();
+                    Calendar calendar = calendarId != 0 ? cacheManager.getObject(Calendar.class, calendarId) : null;
+                    return calendar == null || calendar.checkMoment(event.getEventTime());
+                })
+                .collect(Collectors.toUnmodifiableList());
 
-                for (String notificator : notificators) {
-                    Context.getNotificatorManager().getNotificator(notificator).sendAsync(userId, event, position);
-                }
+        if (!notifications.isEmpty()) {
+            if (position != null && position.getAddress() == null && geocodeOnRequest && geocoder != null) {
+                position.setAddress(geocoder.getAddress(position.getLatitude(), position.getLongitude(), null));
             }
+
+            notifications.forEach(notification -> {
+                cacheManager.getNotificationUsers(notification.getId(), event.getDeviceId()).forEach(user -> {
+                    for (String notificator : notification.getNotificatorsTypes()) {
+                        try {
+                            notificatorManager.getNotificator(notificator).send(user, event, position);
+                        } catch (MessageException | InterruptedException exception) {
+                            LOGGER.warn("Notification failed", exception);
+                        }
+                    }
+                });
+            });
         }
-        if (Context.getEventForwarder() != null) {
-            Context.getEventForwarder().forwardEvent(event, position, usersToForward);
-        }
+
+        forwardEvent(event, position);
     }
 
-    public void updateEvents(Map<Event, Position> events) {
-        for (Entry<Event, Position> event : events.entrySet()) {
-            updateEvent(event.getKey(), event.getValue());
+    private void forwardEvent(Event event, Position position) {
+        if (eventForwarder != null) {
+            EventData eventData = new EventData();
+            eventData.setEvent(event);
+            eventData.setPosition(position);
+            eventData.setDevice(cacheManager.getObject(Device.class, event.getDeviceId()));
+            if (event.getGeofenceId() != 0) {
+                eventData.setGeofence(cacheManager.getObject(Geofence.class, event.getGeofenceId()));
+            }
+            if (event.getMaintenanceId() != 0) {
+                eventData.setMaintenance(cacheManager.getObject(Maintenance.class, event.getMaintenanceId()));
+            }
+            eventForwarder.forward(eventData, (success, throwable) -> {
+                if (!success) {
+                    LOGGER.warn("Event forwarding failed", throwable);
+                }
+            });
         }
     }
 
-    public Set<Typed> getAllNotificationTypes() {
-        Set<Typed> types = new HashSet<>();
-        Field[] fields = Event.class.getDeclaredFields();
-        for (Field field : fields) {
-            if (Modifier.isStatic(field.getModifiers()) && field.getName().startsWith("TYPE_")) {
-                try {
-                    types.add(new Typed(field.get(null).toString()));
-                } catch (IllegalArgumentException | IllegalAccessException error) {
-                    LOGGER.warn("Get event types error", error);
-                }
+    public void updateEvents(Map<Event, Position> events) {
+        for (Entry<Event, Position> entry : events.entrySet()) {
+            Event event = entry.getKey();
+            Position position = entry.getValue();
+            try {
+                cacheManager.addDevice(event.getDeviceId());
+                updateEvent(event, position);
+            } catch (StorageException e) {
+                throw new RuntimeException(e);
+            } finally {
+                cacheManager.removeDevice(event.getDeviceId());
             }
         }
-        return types;
     }
 }
diff --git a/src/main/java/org/traccar/database/OrderManager.java b/src/main/java/org/traccar/database/OrderManager.java
deleted file mode 100644
index c3253e52f..000000000
--- a/src/main/java/org/traccar/database/OrderManager.java
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright 2021 Anton Tananaev (anton@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import org.traccar.model.Order;
-
-public class OrderManager extends ExtendedObjectManager<Order> {
-
-    public OrderManager(DataManager dataManager) {
-        super(dataManager, Order.class);
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/PermissionsManager.java b/src/main/java/org/traccar/database/PermissionsManager.java
deleted file mode 100644
index 32464cf90..000000000
--- a/src/main/java/org/traccar/database/PermissionsManager.java
+++ /dev/null
@@ -1,516 +0,0 @@
-/*
- * Copyright 2015 - 2021 Anton Tananaev (anton@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.traccar.Context;
-import org.traccar.model.Attribute;
-import org.traccar.model.BaseModel;
-import org.traccar.model.Calendar;
-import org.traccar.model.Command;
-import org.traccar.model.Device;
-import org.traccar.model.Driver;
-import org.traccar.model.Geofence;
-import org.traccar.model.Group;
-import org.traccar.model.Maintenance;
-import org.traccar.model.ManagedUser;
-import org.traccar.model.Notification;
-import org.traccar.model.Order;
-import org.traccar.model.Permission;
-import org.traccar.model.Server;
-import org.traccar.model.User;
-
-import java.sql.SQLException;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.locks.ReadWriteLock;
-import java.util.concurrent.locks.ReentrantReadWriteLock;
-
-public class PermissionsManager {
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(PermissionsManager.class);
-
-    private final DataManager dataManager;
-    private final UsersManager usersManager;
-
-    private volatile Server server;
-
-    private final ReadWriteLock lock = new ReentrantReadWriteLock();
-
-    private final Map<Long, Set<Long>> groupPermissions = new HashMap<>();
-    private final Map<Long, Set<Long>> devicePermissions = new HashMap<>();
-    private final Map<Long, Set<Long>> deviceUsers = new HashMap<>();
-    private final Map<Long, Set<Long>> groupDevices = new HashMap<>();
-
-    public PermissionsManager(DataManager dataManager, UsersManager usersManager) {
-        this.dataManager = dataManager;
-        this.usersManager = usersManager;
-        refreshServer();
-        refreshDeviceAndGroupPermissions();
-    }
-
-    protected final void readLock() {
-        lock.readLock().lock();
-    }
-
-    protected final void readUnlock() {
-        lock.readLock().unlock();
-    }
-
-    protected final void writeLock() {
-        lock.writeLock().lock();
-    }
-
-    protected final void writeUnlock() {
-        lock.writeLock().unlock();
-    }
-
-    public User getUser(long userId) {
-        readLock();
-        try {
-            return usersManager.getById(userId);
-        } finally {
-            readUnlock();
-        }
-    }
-
-    public Set<Long> getGroupPermissions(long userId) {
-        readLock();
-        try {
-            if (!groupPermissions.containsKey(userId)) {
-                groupPermissions.put(userId, new HashSet<>());
-            }
-            return groupPermissions.get(userId);
-        } finally {
-            readUnlock();
-        }
-    }
-
-    public Set<Long> getDevicePermissions(long userId) {
-        readLock();
-        try {
-            if (!devicePermissions.containsKey(userId)) {
-                devicePermissions.put(userId, new HashSet<>());
-            }
-            return devicePermissions.get(userId);
-        } finally {
-            readUnlock();
-        }
-    }
-
-    private Set<Long> getAllDeviceUsers(long deviceId) {
-        readLock();
-        try {
-            if (!deviceUsers.containsKey(deviceId)) {
-                deviceUsers.put(deviceId, new HashSet<>());
-            }
-            return deviceUsers.get(deviceId);
-        } finally {
-            readUnlock();
-        }
-    }
-
-    public Set<Long> getDeviceUsers(long deviceId) {
-        Device device = Context.getIdentityManager().getById(deviceId);
-        if (device != null && !device.getDisabled()) {
-            return getAllDeviceUsers(deviceId);
-        } else {
-            Set<Long> result = new HashSet<>();
-            for (long userId : getAllDeviceUsers(deviceId)) {
-                if (getUserAdmin(userId)) {
-                    result.add(userId);
-                }
-            }
-            return result;
-        }
-    }
-
-    public Set<Long> getGroupDevices(long groupId) {
-        readLock();
-        try {
-            if (!groupDevices.containsKey(groupId)) {
-                groupDevices.put(groupId, new HashSet<>());
-            }
-            return groupDevices.get(groupId);
-        } finally {
-            readUnlock();
-        }
-    }
-
-    public void refreshServer() {
-        try {
-            server = dataManager.getServer();
-        } catch (SQLException error) {
-            LOGGER.warn("Refresh server config error", error);
-        }
-    }
-
-    public final void refreshDeviceAndGroupPermissions() {
-        writeLock();
-        try {
-            groupPermissions.clear();
-            devicePermissions.clear();
-            try {
-                GroupTree groupTree = new GroupTree(Context.getGroupsManager().getItems(
-                        Context.getGroupsManager().getAllItems()),
-                        Context.getDeviceManager().getAllDevices());
-                for (Permission groupPermission : dataManager.getPermissions(User.class, Group.class)) {
-                    Set<Long> userGroupPermissions = getGroupPermissions(groupPermission.getOwnerId());
-                    Set<Long> userDevicePermissions = getDevicePermissions(groupPermission.getOwnerId());
-                    userGroupPermissions.add(groupPermission.getPropertyId());
-                    for (Group group : groupTree.getGroups(groupPermission.getPropertyId())) {
-                        userGroupPermissions.add(group.getId());
-                    }
-                    for (Device device : groupTree.getDevices(groupPermission.getPropertyId())) {
-                        userDevicePermissions.add(device.getId());
-                    }
-                }
-
-                for (Permission devicePermission : dataManager.getPermissions(User.class, Device.class)) {
-                    getDevicePermissions(devicePermission.getOwnerId()).add(devicePermission.getPropertyId());
-                }
-
-                groupDevices.clear();
-                for (long groupId : Context.getGroupsManager().getAllItems()) {
-                    for (Device device : groupTree.getDevices(groupId)) {
-                        getGroupDevices(groupId).add(device.getId());
-                    }
-                }
-
-            } catch (SQLException | ClassNotFoundException error) {
-                LOGGER.warn("Refresh device permissions error", error);
-            }
-
-            deviceUsers.clear();
-            for (Map.Entry<Long, Set<Long>> entry : devicePermissions.entrySet()) {
-                for (long deviceId : entry.getValue()) {
-                    getAllDeviceUsers(deviceId).add(entry.getKey());
-                }
-            }
-        } finally {
-            writeUnlock();
-        }
-    }
-
-    public boolean getUserAdmin(long userId) {
-        User user = getUser(userId);
-        return user != null && user.getAdministrator();
-    }
-
-    public void checkAdmin(long userId) throws SecurityException {
-        if (!getUserAdmin(userId)) {
-            throw new SecurityException("Admin access required");
-        }
-    }
-
-    public boolean getUserManager(long userId) {
-        User user = getUser(userId);
-        return user != null && user.getUserLimit() != 0;
-    }
-
-    public void checkManager(long userId) throws SecurityException {
-        if (!getUserManager(userId)) {
-            throw new SecurityException("Manager access required");
-        }
-    }
-
-    public void checkManager(long userId, long managedUserId) throws SecurityException {
-        checkManager(userId);
-        if (!usersManager.getUserItems(userId).contains(managedUserId)) {
-            throw new SecurityException("User access denied");
-        }
-    }
-
-    public void checkUserLimit(long userId) throws SecurityException {
-        int userLimit = getUser(userId).getUserLimit();
-        if (userLimit != -1 && usersManager.getUserItems(userId).size() >= userLimit) {
-            throw new SecurityException("Manager user limit reached");
-        }
-    }
-
-    public void checkDeviceLimit(long userId) throws SecurityException {
-        int deviceLimit = getUser(userId).getDeviceLimit();
-        if (deviceLimit != -1) {
-            int deviceCount;
-            if (getUserManager(userId)) {
-                deviceCount = Context.getDeviceManager().getAllManagedItems(userId).size();
-            } else {
-                deviceCount = Context.getDeviceManager().getAllUserItems(userId).size();
-            }
-            if (deviceCount >= deviceLimit) {
-                throw new SecurityException("User device limit reached");
-            }
-        }
-    }
-
-    public boolean getUserReadonly(long userId) {
-        User user = getUser(userId);
-        return user != null && user.getReadonly();
-    }
-
-    public boolean getUserDeviceReadonly(long userId) {
-        User user = getUser(userId);
-        return user != null && user.getDeviceReadonly();
-    }
-
-    public boolean getUserLimitCommands(long userId) {
-        User user = getUser(userId);
-        return user != null && user.getLimitCommands();
-    }
-
-    public void checkReadonly(long userId) throws SecurityException {
-        if (!getUserAdmin(userId) && (server.getReadonly() || getUserReadonly(userId))) {
-            throw new SecurityException("Account is readonly");
-        }
-    }
-
-    public void checkDeviceReadonly(long userId) throws SecurityException {
-        if (!getUserAdmin(userId) && (server.getDeviceReadonly() || getUserDeviceReadonly(userId))) {
-            throw new SecurityException("Account is device readonly");
-        }
-    }
-
-    public void checkLimitCommands(long userId) throws SecurityException {
-        if (!getUserAdmin(userId) && (server.getLimitCommands() || getUserLimitCommands(userId))) {
-            throw new SecurityException("Account has limit sending commands");
-        }
-    }
-
-    public void checkUserDeviceCommand(long userId, long deviceId, long commandId) throws SecurityException {
-        if (!getUserAdmin(userId) && Context.getCommandsManager().checkDeviceCommand(deviceId, commandId)) {
-            throw new SecurityException("Command can not be sent to this device");
-        }
-    }
-
-    public void checkUserEnabled(long userId) throws SecurityException {
-        User user = getUser(userId);
-        if (user == null) {
-            throw new SecurityException("Unknown account");
-        }
-        if (user.getDisabled()) {
-            throw new SecurityException("Account is disabled");
-        }
-        if (user.getExpirationTime() != null && System.currentTimeMillis() > user.getExpirationTime().getTime()) {
-            throw new SecurityException("Account has expired");
-        }
-    }
-
-    public void checkUserUpdate(long userId, User before, User after) throws SecurityException {
-        if (before.getAdministrator() != after.getAdministrator()
-                || before.getDeviceLimit() != after.getDeviceLimit()
-                || before.getUserLimit() != after.getUserLimit()) {
-            checkAdmin(userId);
-        }
-        User user = getUser(userId);
-        if (user != null && user.getExpirationTime() != null
-                && (after.getExpirationTime() == null
-                || user.getExpirationTime().compareTo(after.getExpirationTime()) < 0)) {
-            checkAdmin(userId);
-        }
-        if (before.getReadonly() != after.getReadonly()
-                || before.getDeviceReadonly() != after.getDeviceReadonly()
-                || before.getDisabled() != after.getDisabled()
-                || before.getLimitCommands() != after.getLimitCommands()) {
-            if (userId == after.getId()) {
-                checkAdmin(userId);
-            }
-            if (!getUserAdmin(userId)) {
-                checkManager(userId);
-            }
-        }
-    }
-
-    public void checkUser(long userId, long managedUserId) throws SecurityException {
-        if (userId != managedUserId && !getUserAdmin(userId)) {
-            checkManager(userId, managedUserId);
-        }
-    }
-
-    public void checkGroup(long userId, long groupId) throws SecurityException {
-        if (!getGroupPermissions(userId).contains(groupId) && !getUserAdmin(userId)) {
-            checkManager(userId);
-            for (long managedUserId : usersManager.getUserItems(userId)) {
-                if (getGroupPermissions(managedUserId).contains(groupId)) {
-                    return;
-                }
-            }
-            throw new SecurityException("Group access denied");
-        }
-    }
-
-    public void checkDevice(long userId, long deviceId) throws SecurityException {
-        if (!Context.getDeviceManager().getUserItems(userId).contains(deviceId) && !getUserAdmin(userId)) {
-            checkManager(userId);
-            for (long managedUserId : usersManager.getUserItems(userId)) {
-                if (Context.getDeviceManager().getUserItems(managedUserId).contains(deviceId)) {
-                    return;
-                }
-            }
-            throw new SecurityException("Device access denied");
-        }
-    }
-
-    public void checkRegistration(long userId) {
-        if (!server.getRegistration() && !getUserAdmin(userId)) {
-            throw new SecurityException("Registration disabled");
-        }
-    }
-
-    public void checkPermission(Class<?> object, long userId, long objectId)
-            throws SecurityException {
-        SimpleObjectManager<? extends BaseModel> manager = null;
-
-        if (object.equals(Device.class)) {
-            checkDevice(userId, objectId);
-        } else if (object.equals(Group.class)) {
-            checkGroup(userId, objectId);
-        } else if (object.equals(User.class) || object.equals(ManagedUser.class)) {
-            checkUser(userId, objectId);
-        } else if (object.equals(Geofence.class)) {
-            manager = Context.getGeofenceManager();
-        } else if (object.equals(Attribute.class)) {
-            manager = Context.getAttributesManager();
-        } else if (object.equals(Driver.class)) {
-            manager = Context.getDriversManager();
-        } else if (object.equals(Calendar.class)) {
-            manager = Context.getCalendarManager();
-        } else if (object.equals(Command.class)) {
-            manager = Context.getCommandsManager();
-        } else if (object.equals(Maintenance.class)) {
-            manager = Context.getMaintenancesManager();
-        } else if (object.equals(Notification.class)) {
-            manager = Context.getNotificationManager();
-        } else if (object.equals(Order.class)) {
-            manager = Context.getOrderManager();
-        } else {
-            throw new IllegalArgumentException("Unknown object type");
-        }
-
-        if (manager != null && !manager.checkItemPermission(userId, objectId) && !getUserAdmin(userId)) {
-            checkManager(userId);
-            for (long managedUserId : usersManager.getManagedItems(userId)) {
-                if (manager.checkItemPermission(managedUserId, objectId)) {
-                    return;
-                }
-            }
-            throw new SecurityException("Type " + object + " access denied");
-        }
-    }
-
-    public void refreshAllUsersPermissions() {
-        if (Context.getGeofenceManager() != null) {
-            Context.getGeofenceManager().refreshUserItems();
-        }
-        Context.getCalendarManager().refreshUserItems();
-        Context.getDriversManager().refreshUserItems();
-        Context.getAttributesManager().refreshUserItems();
-        Context.getCommandsManager().refreshUserItems();
-        Context.getMaintenancesManager().refreshUserItems();
-        if (Context.getNotificationManager() != null) {
-            Context.getNotificationManager().refreshUserItems();
-        }
-    }
-
-    public void refreshAllExtendedPermissions() {
-        if (Context.getGeofenceManager() != null) {
-            Context.getGeofenceManager().refreshExtendedPermissions();
-        }
-        Context.getDriversManager().refreshExtendedPermissions();
-        Context.getAttributesManager().refreshExtendedPermissions();
-        Context.getCommandsManager().refreshExtendedPermissions();
-        Context.getMaintenancesManager().refreshExtendedPermissions();
-    }
-
-    public void refreshPermissions(Permission permission) {
-        if (permission.getOwnerClass().equals(User.class)) {
-            if (permission.getPropertyClass().equals(Device.class)
-                    || permission.getPropertyClass().equals(Group.class)) {
-                refreshDeviceAndGroupPermissions();
-                refreshAllExtendedPermissions();
-            } else if (permission.getPropertyClass().equals(ManagedUser.class)) {
-                usersManager.refreshUserItems();
-            } else if (permission.getPropertyClass().equals(Geofence.class) && Context.getGeofenceManager() != null) {
-                Context.getGeofenceManager().refreshUserItems();
-            } else if (permission.getPropertyClass().equals(Driver.class)) {
-                Context.getDriversManager().refreshUserItems();
-            } else if (permission.getPropertyClass().equals(Attribute.class)) {
-                Context.getAttributesManager().refreshUserItems();
-            } else if (permission.getPropertyClass().equals(Calendar.class)) {
-                Context.getCalendarManager().refreshUserItems();
-            } else if (permission.getPropertyClass().equals(Command.class)) {
-                Context.getCommandsManager().refreshUserItems();
-            } else if (permission.getPropertyClass().equals(Maintenance.class)) {
-                Context.getMaintenancesManager().refreshUserItems();
-            } else if (permission.getPropertyClass().equals(Order.class)) {
-                Context.getOrderManager().refreshUserItems();
-            } else if (permission.getPropertyClass().equals(Notification.class)
-                    && Context.getNotificationManager() != null) {
-                Context.getNotificationManager().refreshUserItems();
-            }
-        } else if (permission.getOwnerClass().equals(Device.class) || permission.getOwnerClass().equals(Group.class)) {
-            if (permission.getPropertyClass().equals(Geofence.class) && Context.getGeofenceManager() != null) {
-                Context.getGeofenceManager().refreshExtendedPermissions();
-            } else if (permission.getPropertyClass().equals(Driver.class)) {
-                Context.getDriversManager().refreshExtendedPermissions();
-            } else if (permission.getPropertyClass().equals(Attribute.class)) {
-                Context.getAttributesManager().refreshExtendedPermissions();
-            } else if (permission.getPropertyClass().equals(Command.class)) {
-                Context.getCommandsManager().refreshExtendedPermissions();
-            } else if (permission.getPropertyClass().equals(Maintenance.class)) {
-                Context.getMaintenancesManager().refreshExtendedPermissions();
-            } else if (permission.getPropertyClass().equals(Order.class)) {
-                Context.getOrderManager().refreshExtendedPermissions();
-            } else if (permission.getPropertyClass().equals(Notification.class)
-                    && Context.getNotificationManager() != null) {
-                Context.getNotificationManager().refreshExtendedPermissions();
-            }
-        }
-    }
-
-    public Server getServer() {
-        return server;
-    }
-
-    public void updateServer(Server server) throws SQLException {
-        dataManager.updateObject(server);
-        this.server = server;
-    }
-
-    public User login(String email, String password) throws SQLException {
-        User user = dataManager.login(email, password);
-        if (user != null) {
-            checkUserEnabled(user.getId());
-            return getUser(user.getId());
-        }
-        return null;
-    }
-
-    public Object lookupAttribute(long userId, String key, Object defaultValue) {
-        Object preference;
-        Object serverPreference = server.getAttributes().get(key);
-        Object userPreference = getUser(userId).getAttributes().get(key);
-        if (server.getForceSettings()) {
-            preference = serverPreference != null ? serverPreference : userPreference;
-        } else {
-            preference = userPreference != null ? userPreference : serverPreference;
-        }
-        return preference != null ? preference : defaultValue;
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/QueryBuilder.java b/src/main/java/org/traccar/database/QueryBuilder.java
deleted file mode 100644
index 396cbf562..000000000
--- a/src/main/java/org/traccar/database/QueryBuilder.java
+++ /dev/null
@@ -1,485 +0,0 @@
-/*
- * Copyright 2015 - 2020 Anton Tananaev (anton@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import com.fasterxml.jackson.core.JsonProcessingException;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.traccar.Context;
-import org.traccar.model.Permission;
-
-import javax.sql.DataSource;
-import java.io.IOException;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-import java.sql.Connection;
-import java.sql.PreparedStatement;
-import java.sql.ResultSet;
-import java.sql.ResultSetMetaData;
-import java.sql.SQLException;
-import java.sql.Statement;
-import java.sql.Timestamp;
-import java.sql.Types;
-import java.util.Collection;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.LinkedHashMap;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Map;
-
-public final class QueryBuilder {
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(QueryBuilder.class);
-
-    private final Map<String, List<Integer>> indexMap = new HashMap<>();
-    private Connection connection;
-    private PreparedStatement statement;
-    private final String query;
-    private final boolean returnGeneratedKeys;
-
-    private QueryBuilder(DataSource dataSource, String query, boolean returnGeneratedKeys) throws SQLException {
-        this.query = query;
-        this.returnGeneratedKeys = returnGeneratedKeys;
-        if (query != null) {
-            connection = dataSource.getConnection();
-            String parsedQuery = parse(query.trim(), indexMap);
-            try {
-                if (returnGeneratedKeys) {
-                    statement = connection.prepareStatement(parsedQuery, Statement.RETURN_GENERATED_KEYS);
-                } else {
-                    statement = connection.prepareStatement(parsedQuery);
-                }
-            } catch (SQLException error) {
-                connection.close();
-                throw error;
-            }
-        }
-    }
-
-    private static String parse(String query, Map<String, List<Integer>> paramMap) {
-
-        int length = query.length();
-        StringBuilder parsedQuery = new StringBuilder(length);
-        boolean inSingleQuote = false;
-        boolean inDoubleQuote = false;
-        int index = 1;
-
-        for (int i = 0; i < length; i++) {
-
-            char c = query.charAt(i);
-
-            // String end
-            if (inSingleQuote) {
-                if (c == '\'') {
-                    inSingleQuote = false;
-                }
-            } else if (inDoubleQuote) {
-                if (c == '"') {
-                    inDoubleQuote = false;
-                }
-            } else {
-
-                // String begin
-                if (c == '\'') {
-                    inSingleQuote = true;
-                } else if (c == '"') {
-                    inDoubleQuote = true;
-                } else if (c == ':' && i + 1 < length
-                        && Character.isJavaIdentifierStart(query.charAt(i + 1))) {
-
-                    // Identifier name
-                    int j = i + 2;
-                    while (j < length && Character.isJavaIdentifierPart(query.charAt(j))) {
-                        j++;
-                    }
-
-                    String name = query.substring(i + 1, j);
-                    c = '?';
-                    i += name.length();
-                    name = name.toLowerCase();
-
-                    // Add to list
-                    List<Integer> indexList = paramMap.computeIfAbsent(name, k -> new LinkedList<>());
-                    indexList.add(index);
-
-                    index++;
-                }
-            }
-
-            parsedQuery.append(c);
-        }
-
-        return parsedQuery.toString();
-    }
-
-    public static QueryBuilder create(DataSource dataSource, String query) throws SQLException {
-        return new QueryBuilder(dataSource, query, false);
-    }
-
-    public static QueryBuilder create(
-            DataSource dataSource, String query, boolean returnGeneratedKeys) throws SQLException {
-        return new QueryBuilder(dataSource, query, returnGeneratedKeys);
-    }
-
-    private List<Integer> indexes(String name) {
-        name = name.toLowerCase();
-        List<Integer> result = indexMap.get(name);
-        if (result == null) {
-            result = new LinkedList<>();
-        }
-        return result;
-    }
-
-    public QueryBuilder setBoolean(String name, boolean value) throws SQLException {
-        for (int i : indexes(name)) {
-            try {
-                statement.setBoolean(i, value);
-            } catch (SQLException error) {
-                statement.close();
-                connection.close();
-                throw error;
-            }
-        }
-        return this;
-    }
-
-    public QueryBuilder setInteger(String name, int value) throws SQLException {
-        for (int i : indexes(name)) {
-            try {
-                statement.setInt(i, value);
-            } catch (SQLException error) {
-                statement.close();
-                connection.close();
-                throw error;
-            }
-        }
-        return this;
-    }
-
-    public QueryBuilder setLong(String name, long value) throws SQLException {
-        return setLong(name, value, false);
-    }
-
-    public QueryBuilder setLong(String name, long value, boolean nullIfZero) throws SQLException {
-        for (int i : indexes(name)) {
-            try {
-                if (value == 0 && nullIfZero) {
-                    statement.setNull(i, Types.INTEGER);
-                } else {
-                    statement.setLong(i, value);
-                }
-            } catch (SQLException error) {
-                statement.close();
-                connection.close();
-                throw error;
-            }
-        }
-        return this;
-    }
-
-    public QueryBuilder setDouble(String name, double value) throws SQLException {
-        for (int i : indexes(name)) {
-            try {
-                statement.setDouble(i, value);
-            } catch (SQLException error) {
-                statement.close();
-                connection.close();
-                throw error;
-            }
-        }
-        return this;
-    }
-
-    public QueryBuilder setString(String name, String value) throws SQLException {
-        for (int i : indexes(name)) {
-            try {
-                if (value == null) {
-                    statement.setNull(i, Types.VARCHAR);
-                } else {
-                    statement.setString(i, value);
-                }
-            } catch (SQLException error) {
-                statement.close();
-                connection.close();
-                throw error;
-            }
-        }
-        return this;
-    }
-
-    public QueryBuilder setDate(String name, Date value) throws SQLException {
-        for (int i : indexes(name)) {
-            try {
-                if (value == null) {
-                    statement.setNull(i, Types.TIMESTAMP);
-                } else {
-                    statement.setTimestamp(i, new Timestamp(value.getTime()));
-                }
-            } catch (SQLException error) {
-                statement.close();
-                connection.close();
-                throw error;
-            }
-        }
-        return this;
-    }
-
-    public QueryBuilder setBlob(String name, byte[] value) throws SQLException {
-        for (int i : indexes(name)) {
-            try {
-                if (value == null) {
-                    statement.setNull(i, Types.BLOB);
-                } else {
-                    statement.setBytes(i, value);
-                }
-            } catch (SQLException error) {
-                statement.close();
-                connection.close();
-                throw error;
-            }
-        }
-        return this;
-    }
-
-    public QueryBuilder setObject(Object object) throws SQLException {
-
-        Method[] methods = object.getClass().getMethods();
-
-        for (Method method : methods) {
-            if (method.getName().startsWith("get") && method.getParameterTypes().length == 0
-                    && !method.isAnnotationPresent(QueryIgnore.class)) {
-                String name = method.getName().substring(3);
-                try {
-                    if (method.getReturnType().equals(boolean.class)) {
-                        setBoolean(name, (Boolean) method.invoke(object));
-                    } else if (method.getReturnType().equals(int.class)) {
-                        setInteger(name, (Integer) method.invoke(object));
-                    } else if (method.getReturnType().equals(long.class)) {
-                        setLong(name, (Long) method.invoke(object), name.endsWith("Id"));
-                    } else if (method.getReturnType().equals(double.class)) {
-                        setDouble(name, (Double) method.invoke(object));
-                    } else if (method.getReturnType().equals(String.class)) {
-                        setString(name, (String) method.invoke(object));
-                    } else if (method.getReturnType().equals(Date.class)) {
-                        setDate(name, (Date) method.invoke(object));
-                    } else if (method.getReturnType().equals(byte[].class)) {
-                        setBlob(name, (byte[]) method.invoke(object));
-                    } else {
-                        setString(name, Context.getObjectMapper().writeValueAsString(method.invoke(object)));
-                    }
-                } catch (IllegalAccessException | InvocationTargetException | JsonProcessingException error) {
-                    LOGGER.warn("Get property error", error);
-                }
-            }
-        }
-
-        return this;
-    }
-
-    private interface ResultSetProcessor<T> {
-        void process(T object, ResultSet resultSet) throws SQLException;
-    }
-
-    public <T> T executeQuerySingle(Class<T> clazz) throws SQLException {
-        Collection<T> result = executeQuery(clazz);
-        if (!result.isEmpty()) {
-            return result.iterator().next();
-        } else {
-            return null;
-        }
-    }
-
-    private <T> void addProcessors(
-            List<ResultSetProcessor<T>> processors,
-            final Class<?> parameterType, final Method method, final String name) {
-
-        if (parameterType.equals(boolean.class)) {
-            processors.add((object, resultSet) -> {
-                try {
-                    method.invoke(object, resultSet.getBoolean(name));
-                } catch (IllegalAccessException | InvocationTargetException error) {
-                    LOGGER.warn("Set property error", error);
-                }
-            });
-        } else if (parameterType.equals(int.class)) {
-            processors.add((object, resultSet) -> {
-                try {
-                    method.invoke(object, resultSet.getInt(name));
-                } catch (IllegalAccessException | InvocationTargetException error) {
-                    LOGGER.warn("Set property error", error);
-                }
-            });
-        } else if (parameterType.equals(long.class)) {
-            processors.add((object, resultSet) -> {
-                try {
-                    method.invoke(object, resultSet.getLong(name));
-                } catch (IllegalAccessException | InvocationTargetException error) {
-                    LOGGER.warn("Set property error", error);
-                }
-            });
-        } else if (parameterType.equals(double.class)) {
-            processors.add((object, resultSet) -> {
-                try {
-                    method.invoke(object, resultSet.getDouble(name));
-                } catch (IllegalAccessException | InvocationTargetException error) {
-                    LOGGER.warn("Set property error", error);
-                }
-            });
-        } else if (parameterType.equals(String.class)) {
-            processors.add((object, resultSet) -> {
-                try {
-                    method.invoke(object, resultSet.getString(name));
-                } catch (IllegalAccessException | InvocationTargetException error) {
-                    LOGGER.warn("Set property error", error);
-                }
-            });
-        } else if (parameterType.equals(Date.class)) {
-            processors.add((object, resultSet) -> {
-                try {
-                    Timestamp timestamp = resultSet.getTimestamp(name);
-                    if (timestamp != null) {
-                        method.invoke(object, new Date(timestamp.getTime()));
-                    }
-                } catch (IllegalAccessException | InvocationTargetException error) {
-                    LOGGER.warn("Set property error", error);
-                }
-            });
-        } else if (parameterType.equals(byte[].class)) {
-            processors.add((object, resultSet) -> {
-                try {
-                    method.invoke(object, resultSet.getBytes(name));
-                } catch (IllegalAccessException | InvocationTargetException error) {
-                    LOGGER.warn("Set property error", error);
-                }
-            });
-        } else {
-            processors.add((object, resultSet) -> {
-                String value = resultSet.getString(name);
-                if (value != null && !value.isEmpty()) {
-                    try {
-                        method.invoke(object, Context.getObjectMapper().readValue(value, parameterType));
-                    } catch (InvocationTargetException | IllegalAccessException | IOException error) {
-                        LOGGER.warn("Set property error", error);
-                    }
-                }
-            });
-        }
-    }
-
-    public <T> Collection<T> executeQuery(Class<T> clazz) throws SQLException {
-        List<T> result = new LinkedList<>();
-
-        if (query != null) {
-
-            try {
-
-                try (ResultSet resultSet = statement.executeQuery()) {
-
-                    ResultSetMetaData resultMetaData = resultSet.getMetaData();
-
-                    List<ResultSetProcessor<T>> processors = new LinkedList<>();
-
-                    Method[] methods = clazz.getMethods();
-
-                    for (final Method method : methods) {
-                        if (method.getName().startsWith("set") && method.getParameterTypes().length == 1
-                                && !method.isAnnotationPresent(QueryIgnore.class)) {
-
-                            final String name = method.getName().substring(3);
-
-                            // Check if column exists
-                            boolean column = false;
-                            for (int i = 1; i <= resultMetaData.getColumnCount(); i++) {
-                                if (name.equalsIgnoreCase(resultMetaData.getColumnLabel(i))) {
-                                    column = true;
-                                    break;
-                                }
-                            }
-                            if (!column) {
-                                continue;
-                            }
-
-                            addProcessors(processors, method.getParameterTypes()[0], method, name);
-                        }
-                    }
-
-                    while (resultSet.next()) {
-                        try {
-                            T object = clazz.getDeclaredConstructor().newInstance();
-                            for (ResultSetProcessor<T> processor : processors) {
-                                processor.process(object, resultSet);
-                            }
-                            result.add(object);
-                        } catch (ReflectiveOperationException e) {
-                            throw new IllegalArgumentException();
-                        }
-                    }
-                }
-
-            } finally {
-                statement.close();
-                connection.close();
-            }
-        }
-
-        return result;
-    }
-
-    public long executeUpdate() throws SQLException {
-
-        if (query != null) {
-            try {
-                statement.execute();
-                if (returnGeneratedKeys) {
-                    ResultSet resultSet = statement.getGeneratedKeys();
-                    if (resultSet.next()) {
-                        return resultSet.getLong(1);
-                    }
-                }
-            } finally {
-                statement.close();
-                connection.close();
-            }
-        }
-        return 0;
-    }
-
-    public Collection<Permission> executePermissionsQuery() throws SQLException, ClassNotFoundException {
-        List<Permission> result = new LinkedList<>();
-        if (query != null) {
-            try {
-                try (ResultSet resultSet = statement.executeQuery()) {
-                    ResultSetMetaData resultMetaData = resultSet.getMetaData();
-                    while (resultSet.next()) {
-                        LinkedHashMap<String, Long> map = new LinkedHashMap<>();
-                        for (int i = 1; i <= resultMetaData.getColumnCount(); i++) {
-                            String label = resultMetaData.getColumnLabel(i);
-                            map.put(label, resultSet.getLong(label));
-                        }
-                        result.add(new Permission(map));
-                    }
-                }
-            } finally {
-                statement.close();
-                connection.close();
-            }
-        }
-
-        return result;
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/QueryExtended.java b/src/main/java/org/traccar/database/QueryExtended.java
deleted file mode 100644
index 07bc2c211..000000000
--- a/src/main/java/org/traccar/database/QueryExtended.java
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Copyright 2017 Anton Tananaev (anton@traccar.org)
- * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-@Target(ElementType.METHOD)
-@Retention(RetentionPolicy.RUNTIME)
-public @interface QueryExtended {
-}
diff --git a/src/main/java/org/traccar/database/QueryIgnore.java b/src/main/java/org/traccar/database/QueryIgnore.java
deleted file mode 100644
index ac835cf2f..000000000
--- a/src/main/java/org/traccar/database/QueryIgnore.java
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright 2017 Anton Tananaev (anton@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-@Target(ElementType.METHOD)
-@Retention(RetentionPolicy.RUNTIME)
-public @interface QueryIgnore {
-}
diff --git a/src/main/java/org/traccar/database/SimpleObjectManager.java b/src/main/java/org/traccar/database/SimpleObjectManager.java
deleted file mode 100644
index eb8284d4e..000000000
--- a/src/main/java/org/traccar/database/SimpleObjectManager.java
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * Copyright 2017 - 2020 Anton Tananaev (anton@traccar.org)
- * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import java.sql.SQLException;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import org.traccar.Context;
-import org.traccar.model.BaseModel;
-import org.traccar.model.Permission;
-import org.traccar.model.User;
-
-public abstract class SimpleObjectManager<T extends BaseModel> extends BaseObjectManager<T>
-        implements ManagableObjects {
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(SimpleObjectManager.class);
-
-    private Map<Long, Set<Long>> userItems;
-
-    protected SimpleObjectManager(DataManager dataManager, Class<T> baseClass) {
-        super(dataManager, baseClass);
-    }
-
-    @Override
-    public final Set<Long> getUserItems(long userId) {
-        try {
-            readLock();
-            Set<Long> result = userItems.get(userId);
-            if (result != null) {
-                return new HashSet<>(result);
-            } else {
-                return new HashSet<>();
-            }
-        } finally {
-            readUnlock();
-        }
-    }
-
-    @Override
-    public Set<Long> getManagedItems(long userId) {
-        Set<Long> result = getUserItems(userId);
-        for (long managedUserId : Context.getUsersManager().getUserItems(userId)) {
-            result.addAll(getUserItems(managedUserId));
-        }
-        return result;
-    }
-
-    public final boolean checkItemPermission(long userId, long itemId) {
-        return getUserItems(userId).contains(itemId);
-    }
-
-    @Override
-    public void refreshItems() {
-        super.refreshItems();
-        refreshUserItems();
-    }
-
-    public final void refreshUserItems() {
-        if (getDataManager() != null) {
-            try {
-                writeLock();
-                userItems = new ConcurrentHashMap<>();
-                for (Permission permission : getDataManager().getPermissions(User.class, getBaseClass())) {
-                    Set<Long> items = userItems.computeIfAbsent(permission.getOwnerId(), key -> new HashSet<>());
-                    items.add(permission.getPropertyId());
-                }
-            } catch (SQLException | ClassNotFoundException error) {
-                LOGGER.warn("Error getting permissions", error);
-            } finally {
-                writeUnlock();
-            }
-        }
-    }
-
-    @Override
-    public void removeItem(long itemId) throws SQLException {
-        super.removeItem(itemId);
-        refreshUserItems();
-    }
-
-}
diff --git a/src/main/java/org/traccar/database/StatisticsManager.java b/src/main/java/org/traccar/database/StatisticsManager.java
index 4ad6d9d5c..e0995dabc 100644
--- a/src/main/java/org/traccar/database/StatisticsManager.java
+++ b/src/main/java/org/traccar/database/StatisticsManager.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 - 2020 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2022 Anton Tananaev (anton@traccar.org)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,12 +23,16 @@ import org.traccar.config.Config;
 import org.traccar.config.Keys;
 import org.traccar.helper.DateUtil;
 import org.traccar.model.Statistics;
+import org.traccar.storage.Storage;
+import org.traccar.storage.StorageException;
+import org.traccar.storage.query.Columns;
+import org.traccar.storage.query.Request;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 import javax.ws.rs.client.Client;
 import javax.ws.rs.client.Entity;
 import javax.ws.rs.core.Form;
-import java.sql.SQLException;
 import java.util.Calendar;
 import java.util.Date;
 import java.util.HashMap;
@@ -37,6 +41,7 @@ import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.atomic.AtomicInteger;
 
+@Singleton
 public class StatisticsManager {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(StatisticsManager.class);
@@ -44,7 +49,7 @@ public class StatisticsManager {
     private static final int SPLIT_MODE = Calendar.DAY_OF_MONTH;
 
     private final Config config;
-    private final DataManager dataManager;
+    private final Storage storage;
     private final Client client;
     private final ObjectMapper objectMapper;
 
@@ -62,9 +67,9 @@ public class StatisticsManager {
     private int geolocationRequests;
 
     @Inject
-    public StatisticsManager(Config config, DataManager dataManager, Client client, ObjectMapper objectMapper) {
+    public StatisticsManager(Config config, Storage storage, Client client, ObjectMapper objectMapper) {
         this.config = config;
-        this.dataManager = dataManager;
+        this.storage = storage;
         this.client = client;
         this.objectMapper = objectMapper;
     }
@@ -105,8 +110,8 @@ public class StatisticsManager {
             }
 
             try {
-                dataManager.addObject(statistics);
-            } catch (SQLException e) {
+                storage.addObject(statistics, new Request(new Columns.Exclude("id")));
+            } catch (StorageException e) {
                 LOGGER.warn("Error saving statistics", e);
             }
 
diff --git a/src/main/java/org/traccar/database/UsersManager.java b/src/main/java/org/traccar/database/UsersManager.java
deleted file mode 100644
index b741a85b6..000000000
--- a/src/main/java/org/traccar/database/UsersManager.java
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * Copyright 2017 - 2020 Anton Tananaev (anton@traccar.org)
- * Copyright 2017 Andrey Kunitsyn (andrey@traccar.org)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.traccar.database;
-
-import java.util.Map;
-import java.util.Set;
-import java.util.concurrent.ConcurrentHashMap;
-
-import org.traccar.model.User;
-
-public class UsersManager extends SimpleObjectManager<User> {
-
-    private Map<String, User> usersTokens;
-
-    public UsersManager(DataManager dataManager) {
-        super(dataManager, User.class);
-        if (usersTokens == null) {
-            usersTokens = new ConcurrentHashMap<>();
-        }
-    }
-
-    private void putToken(User user) {
-        if (usersTokens == null) {
-            usersTokens = new ConcurrentHashMap<>();
-        }
-        if (user.getToken() != null) {
-            usersTokens.put(user.getToken(), user);
-        }
-    }
-
-    @Override
-    protected void addNewItem(User user) {
-        super.addNewItem(user);
-        putToken(user);
-    }
-
-    @Override
-    protected void updateCachedItem(User user) {
-        User cachedUser = getById(user.getId());
-        super.updateCachedItem(user);
-        putToken(user);
-        if (cachedUser.getToken() != null && !cachedUser.getToken().equals(user.getToken())) {
-            usersTokens.remove(cachedUser.getToken());
-        }
-    }
-
-    @Override
-    protected void removeCachedItem(long userId) {
-        User cachedUser = getById(userId);
-        if (cachedUser != null) {
-            String userToken = cachedUser.getToken();
-            super.removeCachedItem(userId);
-            if (userToken != null) {
-                usersTokens.remove(userToken);
-            }
-        }
-    }
-
-    @Override
-    public Set<Long> getManagedItems(long userId) {
-        Set<Long> result = getUserItems(userId);
-        result.add(userId);
-        return result;
-    }
-
-    public User getUserByToken(String token) {
-        return usersTokens.get(token);
-    }
-
-}