Convert project to gradle

24 files changed, 1869 insertions, 0 deletions

diff --git a/src/main/java/org/traccar/handler/ComputedAttributesHandler.java b/src/main/java/org/traccar/handler/ComputedAttributesHandler.java
new file mode 100644
index 000000000..153da29b9
--- /dev/null
+++ b/src/main/java/org/traccar/handler/ComputedAttributesHandler.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2017 - 2019 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.handler;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import io.netty.channel.ChannelHandler;
+import org.apache.commons.jexl2.JexlEngine;
+import org.apache.commons.jexl2.JexlException;
+import org.apache.commons.jexl2.MapContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.BaseDataHandler;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+import org.traccar.database.AttributesManager;
+import org.traccar.database.IdentityManager;
+import org.traccar.model.Attribute;
+import org.traccar.model.Device;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class ComputedAttributesHandler extends BaseDataHandler {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(ComputedAttributesHandler.class);
+
+    private final IdentityManager identityManager;
+    private final AttributesManager attributesManager;
+
+    private final JexlEngine engine;
+
+    private final boolean includeDeviceAttributes;
+
+    public ComputedAttributesHandler(
+            Config config, IdentityManager identityManager, AttributesManager attributesManager) {
+        this.identityManager = identityManager;
+        this.attributesManager = attributesManager;
+        engine = new JexlEngine();
+        engine.setStrict(true);
+        engine.setFunctions(Collections.singletonMap("math", Math.class));
+        includeDeviceAttributes = config.getBoolean(Keys.PROCESSING_COMPUTED_ATTRIBUTES_DEVICE_ATTRIBUTES);
+    }
+
+    private MapContext prepareContext(Position position) {
+        MapContext result = new MapContext();
+        if (includeDeviceAttributes) {
+            Device device = identityManager.getById(position.getDeviceId());
+            if (device != null) {
+                for (Object key : device.getAttributes().keySet()) {
+                    result.set((String) key, device.getAttributes().get(key));
+                }
+            }
+        }
+        Set<Method> methods = new HashSet<>(Arrays.asList(position.getClass().getMethods()));
+        methods.removeAll(Arrays.asList(Object.class.getMethods()));
+        for (Method method : methods) {
+            if (method.getName().startsWith("get") && method.getParameterTypes().length == 0) {
+                String name = Character.toLowerCase(method.getName().charAt(3)) + method.getName().substring(4);
+
+                try {
+                    if (!method.getReturnType().equals(Map.class)) {
+                        result.set(name, method.invoke(position));
+                    } else {
+                        for (Object key : ((Map) method.invoke(position)).keySet()) {
+                            result.set((String) key, ((Map) method.invoke(position)).get(key));
+                        }
+                    }
+                } catch (IllegalAccessException | InvocationTargetException error) {
+                    LOGGER.warn("Attribute reflection error", error);
+                }
+            }
+        }
+        return result;
+    }
+
+    /**
+     * @deprecated logic needs to be extracted to be used in API resource
+     */
+    @Deprecated
+    public Object computeAttribute(Attribute attribute, Position position) throws JexlException {
+        return engine.createExpression(attribute.getExpression()).evaluate(prepareContext(position));
+    }
+
+    @Override
+    protected Position handlePosition(Position position) {
+        Collection<Attribute> attributes = attributesManager.getItems(
+                attributesManager.getAllDeviceItems(position.getDeviceId()));
+        for (Attribute attribute : attributes) {
+            if (attribute.getAttribute() != null) {
+                Object result = null;
+                try {
+                    result = computeAttribute(attribute, position);
+                } catch (JexlException error) {
+                    LOGGER.warn("Attribute computation error", error);
+                }
+                if (result != null) {
+                    try {
+                        switch (attribute.getType()) {
+                            case "number":
+                                Number numberValue = (Number) result;
+                                position.getAttributes().put(attribute.getAttribute(), numberValue);
+                                break;
+                            case "boolean":
+                                Boolean booleanValue = (Boolean) result;
+                                position.getAttributes().put(attribute.getAttribute(), booleanValue);
+                                break;
+                            default:
+                                position.getAttributes().put(attribute.getAttribute(), result.toString());
+                        }
+                    } catch (ClassCastException error) {
+                        LOGGER.warn("Attribute cast error", error);
+                    }
+                }
+            }
+        }
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/CopyAttributesHandler.java b/src/main/java/org/traccar/handler/CopyAttributesHandler.java
new file mode 100644
index 000000000..6a0966d33
--- /dev/null
+++ b/src/main/java/org/traccar/handler/CopyAttributesHandler.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2016 - 2019 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.handler;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.BaseDataHandler;
+import org.traccar.database.IdentityManager;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class CopyAttributesHandler extends BaseDataHandler {
+
+    private IdentityManager identityManager;
+
+    public CopyAttributesHandler(IdentityManager identityManager) {
+        this.identityManager = identityManager;
+    }
+
+    @Override
+    protected Position handlePosition(Position position) {
+        String attributesString = identityManager.lookupAttributeString(
+                position.getDeviceId(), "processing.copyAttributes", "", true);
+        if (attributesString.isEmpty()) {
+            attributesString = Position.KEY_DRIVER_UNIQUE_ID;
+        } else {
+            attributesString += "," + Position.KEY_DRIVER_UNIQUE_ID;
+        }
+        Position last = identityManager.getLastPosition(position.getDeviceId());
+        if (last != null) {
+            for (String attribute : attributesString.split("[ ,]")) {
+                if (last.getAttributes().containsKey(attribute) && !position.getAttributes().containsKey(attribute)) {
+                    position.getAttributes().put(attribute, last.getAttributes().get(attribute));
+                }
+            }
+        }
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/DefaultDataHandler.java b/src/main/java/org/traccar/handler/DefaultDataHandler.java
new file mode 100644
index 000000000..9d8ea044d
--- /dev/null
+++ b/src/main/java/org/traccar/handler/DefaultDataHandler.java
@@ -0,0 +1,48 @@
+/*
+ * 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.handler;
+
+import io.netty.channel.ChannelHandler;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.BaseDataHandler;
+import org.traccar.database.DataManager;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class DefaultDataHandler extends BaseDataHandler {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(DefaultDataHandler.class);
+
+    private final DataManager dataManager;
+
+    public DefaultDataHandler(DataManager dataManager) {
+        this.dataManager = dataManager;
+    }
+
+    @Override
+    protected Position handlePosition(Position position) {
+
+        try {
+            dataManager.addObject(position);
+        } catch (Exception error) {
+            LOGGER.warn("Failed to store position", error);
+        }
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/DistanceHandler.java b/src/main/java/org/traccar/handler/DistanceHandler.java
new file mode 100644
index 000000000..a336a884e
--- /dev/null
+++ b/src/main/java/org/traccar/handler/DistanceHandler.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2015 Amila Silva
+ * Copyright 2016 - 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.handler;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.BaseDataHandler;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+import org.traccar.database.IdentityManager;
+import org.traccar.helper.DistanceCalculator;
+import org.traccar.model.Position;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+@ChannelHandler.Sharable
+public class DistanceHandler extends BaseDataHandler {
+
+    private final IdentityManager identityManager;
+
+    private final boolean filter;
+    private final int coordinatesMinError;
+    private final int coordinatesMaxError;
+
+    public DistanceHandler(Config config, IdentityManager identityManager) {
+        this.identityManager = identityManager;
+        this.filter = config.getBoolean(Keys.COORDINATES_FILTER);
+        this.coordinatesMinError = config.getInteger(Keys.COORDINATES_MIN_ERROR);
+        this.coordinatesMaxError = config.getInteger(Keys.COORDINATES_MAX_ERROR);
+    }
+
+    @Override
+    protected Position handlePosition(Position position) {
+
+        double distance = 0.0;
+        if (position.getAttributes().containsKey(Position.KEY_DISTANCE)) {
+            distance = position.getDouble(Position.KEY_DISTANCE);
+        }
+        double totalDistance = 0.0;
+
+        Position last = identityManager != null ? identityManager.getLastPosition(position.getDeviceId()) : null;
+        if (last != null) {
+            totalDistance = last.getDouble(Position.KEY_TOTAL_DISTANCE);
+            if (!position.getAttributes().containsKey(Position.KEY_DISTANCE)) {
+                distance = DistanceCalculator.distance(
+                        position.getLatitude(), position.getLongitude(),
+                        last.getLatitude(), last.getLongitude());
+                distance = BigDecimal.valueOf(distance).setScale(2, RoundingMode.HALF_EVEN).doubleValue();
+            }
+            if (filter && last.getValid() && last.getLatitude() != 0 && last.getLongitude() != 0) {
+                boolean satisfiesMin = coordinatesMinError == 0 || distance > coordinatesMinError;
+                boolean satisfiesMax = coordinatesMaxError == 0
+                        || distance < coordinatesMaxError || position.getValid();
+                if (!satisfiesMin || !satisfiesMax) {
+                    position.setLatitude(last.getLatitude());
+                    position.setLongitude(last.getLongitude());
+                    distance = 0;
+                }
+            }
+        }
+        position.set(Position.KEY_DISTANCE, distance);
+        totalDistance = BigDecimal.valueOf(totalDistance + distance).setScale(2, RoundingMode.HALF_EVEN).doubleValue();
+        position.set(Position.KEY_TOTAL_DISTANCE, totalDistance);
+
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/EngineHoursHandler.java b/src/main/java/org/traccar/handler/EngineHoursHandler.java
new file mode 100644
index 000000000..92da84e6b
--- /dev/null
+++ b/src/main/java/org/traccar/handler/EngineHoursHandler.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2018 - 2019 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.handler;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.BaseDataHandler;
+import org.traccar.database.IdentityManager;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class EngineHoursHandler extends BaseDataHandler {
+
+    private final IdentityManager identityManager;
+
+    public EngineHoursHandler(IdentityManager identityManager) {
+        this.identityManager = identityManager;
+    }
+
+    @Override
+    protected Position handlePosition(Position position) {
+        if (!position.getAttributes().containsKey(Position.KEY_HOURS)) {
+            Position last = identityManager.getLastPosition(position.getDeviceId());
+            if (last != null) {
+                long hours = last.getLong(Position.KEY_HOURS);
+                if (last.getBoolean(Position.KEY_IGNITION) && position.getBoolean(Position.KEY_IGNITION)) {
+                    hours += position.getFixTime().getTime() - last.getFixTime().getTime();
+                }
+                if (hours != 0) {
+                    position.set(Position.KEY_HOURS, hours);
+                }
+            }
+        }
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/FilterHandler.java b/src/main/java/org/traccar/handler/FilterHandler.java
new file mode 100644
index 000000000..dceaede01
--- /dev/null
+++ b/src/main/java/org/traccar/handler/FilterHandler.java
@@ -0,0 +1,206 @@
+/*
+ * Copyright 2014 - 2018 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.handler;
+
+import io.netty.channel.ChannelHandler;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.BaseDataHandler;
+import org.traccar.Context;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+import org.traccar.helper.UnitsConverter;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class FilterHandler extends BaseDataHandler {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(FilterHandler.class);
+
+    private boolean filterInvalid;
+    private boolean filterZero;
+    private boolean filterDuplicate;
+    private long filterFuture;
+    private boolean filterApproximate;
+    private int filterAccuracy;
+    private boolean filterStatic;
+    private int filterDistance;
+    private int filterMaxSpeed;
+    private long filterMinPeriod;
+    private long skipLimit;
+    private boolean skipAttributes;
+
+    public FilterHandler(Config config) {
+        filterInvalid = config.getBoolean(Keys.FILTER_INVALID);
+        filterZero = config.getBoolean(Keys.FILTER_ZERO);
+        filterDuplicate = config.getBoolean(Keys.FILTER_DUPLICATE);
+        filterFuture = config.getLong(Keys.FILTER_FUTURE) * 1000;
+        filterAccuracy = config.getInteger(Keys.FILTER_ACCURACY);
+        filterApproximate = config.getBoolean(Keys.FILTER_APPROXIMATE);
+        filterStatic = config.getBoolean(Keys.FILTER_STATIC);
+        filterDistance = config.getInteger(Keys.FILTER_DISTANCE);
+        filterMaxSpeed = config.getInteger(Keys.FILTER_MAX_SPEED);
+        filterMinPeriod = config.getInteger(Keys.FILTER_MIN_PERIOD) * 1000;
+        skipLimit = config.getLong(Keys.FILTER_SKIP_LIMIT) * 1000;
+        skipAttributes = config.getBoolean(Keys.FILTER_SKIP_ATTRIBUTES_ENABLE);
+    }
+
+    private boolean filterInvalid(Position position) {
+        return filterInvalid && (!position.getValid()
+           || position.getLatitude() > 90 || position.getLongitude() > 180
+           || position.getLatitude() < -90 || position.getLongitude() < -180);
+    }
+
+    private boolean filterZero(Position position) {
+        return filterZero && position.getLatitude() == 0.0 && position.getLongitude() == 0.0;
+    }
+
+    private boolean filterDuplicate(Position position, Position last) {
+        if (filterDuplicate && last != null && position.getFixTime().equals(last.getFixTime())) {
+            for (String key : position.getAttributes().keySet()) {
+                if (!last.getAttributes().containsKey(key)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        return false;
+    }
+
+    private boolean filterFuture(Position position) {
+        return filterFuture != 0 && position.getFixTime().getTime() > System.currentTimeMillis() + filterFuture;
+    }
+
+    private boolean filterAccuracy(Position position) {
+        return filterAccuracy != 0 && position.getAccuracy() > filterAccuracy;
+    }
+
+    private boolean filterApproximate(Position position) {
+        return filterApproximate && position.getBoolean(Position.KEY_APPROXIMATE);
+    }
+
+    private boolean filterStatic(Position position) {
+        return filterStatic && position.getSpeed() == 0.0;
+    }
+
+    private boolean filterDistance(Position position, Position last) {
+        if (filterDistance != 0 && last != null) {
+            return position.getDouble(Position.KEY_DISTANCE) < filterDistance;
+        }
+        return false;
+    }
+
+    private boolean filterMaxSpeed(Position position, Position last) {
+        if (filterMaxSpeed != 0 && last != null) {
+            double distance = position.getDouble(Position.KEY_DISTANCE);
+            double time = position.getFixTime().getTime() - last.getFixTime().getTime();
+            return UnitsConverter.knotsFromMps(distance / (time / 1000)) > filterMaxSpeed;
+        }
+        return false;
+    }
+
+    private boolean filterMinPeriod(Position position, Position last) {
+        if (filterMinPeriod != 0 && last != null) {
+            long time = position.getFixTime().getTime() - last.getFixTime().getTime();
+            return time > 0 && time < filterMinPeriod;
+        }
+        return false;
+    }
+
+    private boolean skipLimit(Position position, Position last) {
+        if (skipLimit != 0 && last != null) {
+            return (position.getServerTime().getTime() - last.getServerTime().getTime()) > skipLimit;
+        }
+        return false;
+    }
+
+    private boolean skipAttributes(Position position) {
+        if (skipAttributes) {
+            String attributesString = Context.getIdentityManager().lookupAttributeString(
+                    position.getDeviceId(), "filter.skipAttributes", "", true);
+            for (String attribute : attributesString.split("[ ,]")) {
+                if (position.getAttributes().containsKey(attribute)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    private boolean filter(Position position) {
+
+        StringBuilder filterType = new StringBuilder();
+
+        Position last = null;
+        if (Context.getIdentityManager() != null) {
+            last = Context.getIdentityManager().getLastPosition(position.getDeviceId());
+        }
+
+        if (filterInvalid(position)) {
+            filterType.append("Invalid ");
+        }
+        if (filterZero(position)) {
+            filterType.append("Zero ");
+        }
+        if (filterDuplicate(position, last) && !skipLimit(position, last) && !skipAttributes(position)) {
+            filterType.append("Duplicate ");
+        }
+        if (filterFuture(position)) {
+            filterType.append("Future ");
+        }
+        if (filterAccuracy(position)) {
+            filterType.append("Accuracy ");
+        }
+        if (filterApproximate(position)) {
+            filterType.append("Approximate ");
+        }
+        if (filterStatic(position) && !skipLimit(position, last) && !skipAttributes(position)) {
+            filterType.append("Static ");
+        }
+        if (filterDistance(position, last) && !skipLimit(position, last) && !skipAttributes(position)) {
+            filterType.append("Distance ");
+        }
+        if (filterMaxSpeed(position, last)) {
+            filterType.append("MaxSpeed ");
+        }
+        if (filterMinPeriod(position, last)) {
+            filterType.append("MinPeriod ");
+        }
+
+        if (filterType.length() > 0) {
+
+            StringBuilder message = new StringBuilder();
+            message.append("Position filtered by ");
+            message.append(filterType.toString());
+            message.append("filters from device: ");
+            message.append(Context.getIdentityManager().getById(position.getDeviceId()).getUniqueId());
+
+            LOGGER.info(message.toString());
+            return true;
+        }
+
+        return false;
+    }
+
+    @Override
+    protected Position handlePosition(Position position) {
+        if (filter(position)) {
+            return null;
+        }
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/GeocoderHandler.java b/src/main/java/org/traccar/handler/GeocoderHandler.java
new file mode 100644
index 000000000..b96f01b3a
--- /dev/null
+++ b/src/main/java/org/traccar/handler/GeocoderHandler.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2012 - 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.handler;
+
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+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.database.IdentityManager;
+import org.traccar.database.StatisticsManager;
+import org.traccar.geocoder.Geocoder;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class GeocoderHandler extends ChannelInboundHandlerAdapter {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(GeocoderHandler.class);
+
+    private final Geocoder geocoder;
+    private final IdentityManager identityManager;
+    private final StatisticsManager statisticsManager;
+    private final boolean ignorePositions;
+    private final boolean processInvalidPositions;
+    private final int geocoderReuseDistance;
+
+    public GeocoderHandler(
+            Config config, Geocoder geocoder, IdentityManager identityManager, StatisticsManager statisticsManager) {
+        this.geocoder = geocoder;
+        this.identityManager = identityManager;
+        this.statisticsManager = statisticsManager;
+        ignorePositions = Context.getConfig().getBoolean(Keys.GEOCODER_IGNORE_POSITIONS);
+        processInvalidPositions = config.getBoolean(Keys.GEOCODER_PROCESS_INVALID_POSITIONS);
+        geocoderReuseDistance = config.getInteger(Keys.GEOCODER_REUSE_DISTANCE, 0);
+    }
+
+    @Override
+    public void channelRead(final ChannelHandlerContext ctx, Object message) {
+        if (message instanceof Position && !ignorePositions) {
+            final Position position = (Position) message;
+            if (processInvalidPositions || position.getValid()) {
+                if (geocoderReuseDistance != 0) {
+                    Position lastPosition = identityManager.getLastPosition(position.getDeviceId());
+                    if (lastPosition != null && lastPosition.getAddress() != null
+                            && position.getDouble(Position.KEY_DISTANCE) <= geocoderReuseDistance) {
+                        position.setAddress(lastPosition.getAddress());
+                        ctx.fireChannelRead(position);
+                        return;
+                    }
+                }
+
+                if (statisticsManager != null) {
+                    statisticsManager.registerGeocoderRequest();
+                }
+
+                geocoder.getAddress(position.getLatitude(), position.getLongitude(),
+                        new Geocoder.ReverseGeocoderCallback() {
+                    @Override
+                    public void onSuccess(String address) {
+                        position.setAddress(address);
+                        ctx.fireChannelRead(position);
+                    }
+
+                    @Override
+                    public void onFailure(Throwable e) {
+                        LOGGER.warn("Geocoding failed", e);
+                        ctx.fireChannelRead(position);
+                    }
+                });
+            } else {
+                ctx.fireChannelRead(position);
+            }
+        } else {
+            ctx.fireChannelRead(message);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/GeolocationHandler.java b/src/main/java/org/traccar/handler/GeolocationHandler.java
new file mode 100644
index 000000000..c7b39e491
--- /dev/null
+++ b/src/main/java/org/traccar/handler/GeolocationHandler.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2015 - 2018 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.handler;
+
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+import org.traccar.database.StatisticsManager;
+import org.traccar.geolocation.GeolocationProvider;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class GeolocationHandler extends ChannelInboundHandlerAdapter {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(GeolocationHandler.class);
+
+    private final GeolocationProvider geolocationProvider;
+    private final StatisticsManager statisticsManager;
+    private final boolean processInvalidPositions;
+
+    public GeolocationHandler(
+            Config config, GeolocationProvider geolocationProvider, StatisticsManager statisticsManager) {
+        this.geolocationProvider = geolocationProvider;
+        this.statisticsManager = statisticsManager;
+        this.processInvalidPositions = config.getBoolean(Keys.GEOLOCATION_PROCESS_INVALID_POSITIONS);
+    }
+
+    @Override
+    public void channelRead(final ChannelHandlerContext ctx, Object message) {
+        if (message instanceof Position) {
+            final Position position = (Position) message;
+            if ((position.getOutdated() || processInvalidPositions && !position.getValid())
+                    && position.getNetwork() != null) {
+                if (statisticsManager != null) {
+                    statisticsManager.registerGeolocationRequest();
+                }
+
+                geolocationProvider.getLocation(position.getNetwork(),
+                        new GeolocationProvider.LocationProviderCallback() {
+                    @Override
+                    public void onSuccess(double latitude, double longitude, double accuracy) {
+                        position.set(Position.KEY_APPROXIMATE, true);
+                        position.setValid(true);
+                        position.setFixTime(position.getDeviceTime());
+                        position.setLatitude(latitude);
+                        position.setLongitude(longitude);
+                        position.setAccuracy(accuracy);
+                        position.setAltitude(0);
+                        position.setSpeed(0);
+                        position.setCourse(0);
+                        position.set(Position.KEY_RSSI, 0);
+                        ctx.fireChannelRead(position);
+                    }
+
+                    @Override
+                    public void onFailure(Throwable e) {
+                        LOGGER.warn("Geolocation network error", e);
+                        ctx.fireChannelRead(position);
+                    }
+                });
+            } else {
+                ctx.fireChannelRead(position);
+            }
+        } else {
+            ctx.fireChannelRead(message);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/HemisphereHandler.java b/src/main/java/org/traccar/handler/HemisphereHandler.java
new file mode 100644
index 000000000..aff3d8a64
--- /dev/null
+++ b/src/main/java/org/traccar/handler/HemisphereHandler.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2016 - 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.handler;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.BaseDataHandler;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class HemisphereHandler extends BaseDataHandler {
+
+    private int latitudeFactor;
+    private int longitudeFactor;
+
+    public HemisphereHandler(Config config) {
+        String latitudeHemisphere = config.getString(Keys.LOCATION_LATITUDE_HEMISPHERE);
+        if (latitudeHemisphere != null) {
+            if (latitudeHemisphere.equalsIgnoreCase("N")) {
+                latitudeFactor = 1;
+            } else if (latitudeHemisphere.equalsIgnoreCase("S")) {
+                latitudeFactor = -1;
+            }
+        }
+        String longitudeHemisphere = config.getString(Keys.LOCATION_LATITUDE_HEMISPHERE);
+        if (longitudeHemisphere != null) {
+            if (longitudeHemisphere.equalsIgnoreCase("E")) {
+                longitudeFactor = 1;
+            } else if (longitudeHemisphere.equalsIgnoreCase("W")) {
+                longitudeFactor = -1;
+            }
+        }
+    }
+
+    @Override
+    protected Position handlePosition(Position position) {
+        if (latitudeFactor != 0) {
+            position.setLatitude(Math.abs(position.getLatitude()) * latitudeFactor);
+        }
+        if (longitudeFactor != 0) {
+            position.setLongitude(Math.abs(position.getLongitude()) * longitudeFactor);
+        }
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/MotionHandler.java b/src/main/java/org/traccar/handler/MotionHandler.java
new file mode 100644
index 000000000..e8051dd75
--- /dev/null
+++ b/src/main/java/org/traccar/handler/MotionHandler.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2017 - 2019 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.handler;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.BaseDataHandler;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class MotionHandler extends BaseDataHandler {
+
+    private double speedThreshold;
+
+    public MotionHandler(double speedThreshold) {
+        this.speedThreshold = speedThreshold;
+    }
+
+    @Override
+    protected Position handlePosition(Position position) {
+        if (!position.getAttributes().containsKey(Position.KEY_MOTION)) {
+            position.set(Position.KEY_MOTION, position.getSpeed() > speedThreshold);
+        }
+        return position;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/NetworkMessageHandler.java b/src/main/java/org/traccar/handler/NetworkMessageHandler.java
new file mode 100644
index 000000000..b1d926bfa
--- /dev/null
+++ b/src/main/java/org/traccar/handler/NetworkMessageHandler.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright 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.handler;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelDuplexHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelPromise;
+import io.netty.channel.socket.DatagramChannel;
+import io.netty.channel.socket.DatagramPacket;
+import org.traccar.NetworkMessage;
+
+import java.net.InetSocketAddress;
+
+public class NetworkMessageHandler extends ChannelDuplexHandler {
+
+    @Override
+    public void channelRead(ChannelHandlerContext ctx, Object msg) {
+        if (ctx.channel() instanceof DatagramChannel) {
+            DatagramPacket packet = (DatagramPacket) msg;
+            ctx.fireChannelRead(new NetworkMessage(packet.content(), packet.sender()));
+        } else if (msg instanceof ByteBuf) {
+            ByteBuf buffer = (ByteBuf) msg;
+            ctx.fireChannelRead(new NetworkMessage(buffer, ctx.channel().remoteAddress()));
+        }
+    }
+
+    @Override
+    public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) {
+        if (msg instanceof NetworkMessage) {
+            NetworkMessage message = (NetworkMessage) msg;
+            if (ctx.channel() instanceof DatagramChannel) {
+                InetSocketAddress recipient = (InetSocketAddress) message.getRemoteAddress();
+                InetSocketAddress sender = (InetSocketAddress) ctx.channel().localAddress();
+                ctx.write(new DatagramPacket((ByteBuf) message.getMessage(), recipient, sender), promise);
+            } else {
+                ctx.write(message.getMessage(), promise);
+            }
+        } else {
+            ctx.write(msg, promise);
+        }
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/OpenChannelHandler.java b/src/main/java/org/traccar/handler/OpenChannelHandler.java
new file mode 100644
index 000000000..d09d617ab
--- /dev/null
+++ b/src/main/java/org/traccar/handler/OpenChannelHandler.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 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.handler;
+
+import io.netty.channel.ChannelDuplexHandler;
+import io.netty.channel.ChannelHandlerContext;
+import org.traccar.TrackerServer;
+
+public class OpenChannelHandler extends ChannelDuplexHandler {
+
+    private final TrackerServer server;
+
+    public OpenChannelHandler(TrackerServer server) {
+        this.server = server;
+    }
+
+    @Override
+    public void channelActive(ChannelHandlerContext ctx) throws Exception {
+        super.channelActive(ctx);
+        server.getChannelGroup().add(ctx.channel());
+    }
+
+    @Override
+    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
+        super.channelInactive(ctx);
+        server.getChannelGroup().remove(ctx.channel());
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/RemoteAddressHandler.java b/src/main/java/org/traccar/handler/RemoteAddressHandler.java
new file mode 100644
index 000000000..c09b8c39a
--- /dev/null
+++ b/src/main/java/org/traccar/handler/RemoteAddressHandler.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2015 - 2018 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.handler;
+
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import org.traccar.model.Position;
+
+import java.net.InetSocketAddress;
+
+@ChannelHandler.Sharable
+public class RemoteAddressHandler extends ChannelInboundHandlerAdapter {
+
+    @Override
+    public void channelRead(ChannelHandlerContext ctx, Object msg) {
+
+        InetSocketAddress remoteAddress = (InetSocketAddress) ctx.channel().remoteAddress();
+        String hostAddress = remoteAddress != null ? remoteAddress.getAddress().getHostAddress() : null;
+
+        if (msg instanceof Position) {
+            Position position = (Position) msg;
+            position.set(Position.KEY_IP, hostAddress);
+        }
+
+        ctx.fireChannelRead(msg);
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/StandardLoggingHandler.java b/src/main/java/org/traccar/handler/StandardLoggingHandler.java
new file mode 100644
index 000000000..88010458f
--- /dev/null
+++ b/src/main/java/org/traccar/handler/StandardLoggingHandler.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright 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.handler;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufUtil;
+import io.netty.channel.ChannelDuplexHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelPromise;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.NetworkMessage;
+
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+
+public class StandardLoggingHandler extends ChannelDuplexHandler {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(StandardLoggingHandler.class);
+
+    @Override
+    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+        log(ctx, false, msg);
+        super.channelRead(ctx, msg);
+    }
+
+    @Override
+    public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
+        log(ctx, true, msg);
+        super.write(ctx, msg, promise);
+    }
+
+    public void log(ChannelHandlerContext ctx, boolean downstream, Object o) {
+        if (o instanceof NetworkMessage) {
+            NetworkMessage networkMessage = (NetworkMessage) o;
+            if (networkMessage.getMessage() instanceof ByteBuf) {
+                log(ctx, downstream, networkMessage.getRemoteAddress(), (ByteBuf) networkMessage.getMessage());
+            }
+        } else if (o instanceof ByteBuf) {
+            log(ctx, downstream, ctx.channel().remoteAddress(), (ByteBuf) o);
+        }
+    }
+
+    public void log(ChannelHandlerContext ctx, boolean downstream, SocketAddress remoteAddress, ByteBuf buf) {
+        StringBuilder message = new StringBuilder();
+
+        message.append("[").append(ctx.channel().id().asShortText()).append(": ");
+        message.append(((InetSocketAddress) ctx.channel().localAddress()).getPort());
+        if (downstream) {
+            message.append(" > ");
+        } else {
+            message.append(" < ");
+        }
+
+        if (remoteAddress instanceof InetSocketAddress) {
+            message.append(((InetSocketAddress) remoteAddress).getHostString());
+        } else {
+            message.append("unknown");
+        }
+        message.append("]");
+
+        message.append(" HEX: ");
+        message.append(ByteBufUtil.hexDump(buf));
+
+        LOGGER.info(message.toString());
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/events/AlertEventHandler.java b/src/main/java/org/traccar/handler/events/AlertEventHandler.java
new file mode 100644
index 000000000..0b7c8d23e
--- /dev/null
+++ b/src/main/java/org/traccar/handler/events/AlertEventHandler.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2016 - 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.handler.events;
+
+import java.util.Collections;
+import java.util.Map;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+import org.traccar.database.IdentityManager;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class AlertEventHandler extends BaseEventHandler {
+
+    private final IdentityManager identityManager;
+    private final boolean ignoreDuplicateAlerts;
+
+    public AlertEventHandler(Config config, IdentityManager identityManager) {
+        this.identityManager = identityManager;
+        ignoreDuplicateAlerts = config.getBoolean(Keys.EVENT_IGNORE_DUPLICATE_ALERTS);
+    }
+
+    @Override
+    protected Map<Event, Position> analyzePosition(Position position) {
+        Object alarm = position.getAttributes().get(Position.KEY_ALARM);
+        if (alarm != null) {
+            boolean ignoreAlert = false;
+            if (ignoreDuplicateAlerts) {
+                Position lastPosition = identityManager.getLastPosition(position.getDeviceId());
+                if (lastPosition != null && alarm.equals(lastPosition.getAttributes().get(Position.KEY_ALARM))) {
+                    ignoreAlert = true;
+                }
+            }
+            if (!ignoreAlert) {
+                Event event = new Event(Event.TYPE_ALARM, position.getDeviceId(), position.getId());
+                event.set(Position.KEY_ALARM, (String) alarm);
+                return Collections.singletonMap(event, position);
+            }
+        }
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/events/BaseEventHandler.java b/src/main/java/org/traccar/handler/events/BaseEventHandler.java
new file mode 100644
index 000000000..41f677f6c
--- /dev/null
+++ b/src/main/java/org/traccar/handler/events/BaseEventHandler.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2016 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.handler.events;
+
+import java.util.Map;
+
+import org.traccar.BaseDataHandler;
+import org.traccar.Context;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+public abstract class BaseEventHandler extends BaseDataHandler {
+
+    @Override
+    protected Position handlePosition(Position position) {
+        Map<Event, Position> events = analyzePosition(position);
+        if (events != null && Context.getNotificationManager() != null) {
+            Context.getNotificationManager().updateEvents(events);
+        }
+        return position;
+    }
+
+    protected abstract Map<Event, Position> analyzePosition(Position position);
+
+}
diff --git a/src/main/java/org/traccar/handler/events/CommandResultEventHandler.java b/src/main/java/org/traccar/handler/events/CommandResultEventHandler.java
new file mode 100644
index 000000000..cfe676653
--- /dev/null
+++ b/src/main/java/org/traccar/handler/events/CommandResultEventHandler.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2016 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.handler.events;
+
+import java.util.Collections;
+import java.util.Map;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class CommandResultEventHandler extends BaseEventHandler {
+
+    @Override
+    protected Map<Event, Position> analyzePosition(Position position) {
+        Object commandResult = position.getAttributes().get(Position.KEY_RESULT);
+        if (commandResult != null) {
+            Event event = new Event(Event.TYPE_COMMAND_RESULT, position.getDeviceId(), position.getId());
+            event.set(Position.KEY_RESULT, (String) commandResult);
+            return Collections.singletonMap(event, position);
+        }
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/events/DriverEventHandler.java b/src/main/java/org/traccar/handler/events/DriverEventHandler.java
new file mode 100644
index 000000000..994df93fa
--- /dev/null
+++ b/src/main/java/org/traccar/handler/events/DriverEventHandler.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2017 - 2019 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.handler.events;
+
+import java.util.Collections;
+import java.util.Map;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.database.IdentityManager;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class DriverEventHandler extends BaseEventHandler {
+
+    private final IdentityManager identityManager;
+
+    public DriverEventHandler(IdentityManager identityManager) {
+        this.identityManager = identityManager;
+    }
+
+    @Override
+    protected Map<Event, Position> analyzePosition(Position position) {
+        if (!identityManager.isLatestPosition(position)) {
+            return null;
+        }
+        String driverUniqueId = position.getString(Position.KEY_DRIVER_UNIQUE_ID);
+        if (driverUniqueId != null) {
+            String oldDriverUniqueId = null;
+            Position lastPosition = identityManager.getLastPosition(position.getDeviceId());
+            if (lastPosition != null) {
+                oldDriverUniqueId = lastPosition.getString(Position.KEY_DRIVER_UNIQUE_ID);
+            }
+            if (!driverUniqueId.equals(oldDriverUniqueId)) {
+                Event event = new Event(Event.TYPE_DRIVER_CHANGED, position.getDeviceId(), position.getId());
+                event.set(Position.KEY_DRIVER_UNIQUE_ID, driverUniqueId);
+                return Collections.singletonMap(event, position);
+            }
+        }
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/events/FuelDropEventHandler.java b/src/main/java/org/traccar/handler/events/FuelDropEventHandler.java
new file mode 100644
index 000000000..59de61bba
--- /dev/null
+++ b/src/main/java/org/traccar/handler/events/FuelDropEventHandler.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2017 - 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.handler.events;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.database.IdentityManager;
+import org.traccar.model.Device;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+import java.util.Collections;
+import java.util.Map;
+
+@ChannelHandler.Sharable
+public class FuelDropEventHandler extends BaseEventHandler {
+
+    public static final String ATTRIBUTE_FUEL_DROP_THRESHOLD = "fuelDropThreshold";
+
+    private final IdentityManager identityManager;
+
+    public FuelDropEventHandler(IdentityManager identityManager) {
+        this.identityManager = identityManager;
+    }
+
+    @Override
+    protected Map<Event, Position> analyzePosition(Position position) {
+
+        Device device = identityManager.getById(position.getDeviceId());
+        if (device == null) {
+            return null;
+        }
+        if (!identityManager.isLatestPosition(position)) {
+            return null;
+        }
+
+        double fuelDropThreshold = identityManager
+                .lookupAttributeDouble(device.getId(), ATTRIBUTE_FUEL_DROP_THRESHOLD, 0, false);
+
+        if (fuelDropThreshold > 0) {
+            Position lastPosition = identityManager.getLastPosition(position.getDeviceId());
+            if (position.getAttributes().containsKey(Position.KEY_FUEL_LEVEL)
+                    && lastPosition != null && lastPosition.getAttributes().containsKey(Position.KEY_FUEL_LEVEL)) {
+
+                double drop = lastPosition.getDouble(Position.KEY_FUEL_LEVEL)
+                        - position.getDouble(Position.KEY_FUEL_LEVEL);
+                if (drop >= fuelDropThreshold) {
+                    Event event = new Event(Event.TYPE_DEVICE_FUEL_DROP, position.getDeviceId(), position.getId());
+                    event.set(ATTRIBUTE_FUEL_DROP_THRESHOLD, fuelDropThreshold);
+                    return Collections.singletonMap(event, position);
+                }
+            }
+        }
+
+        return null;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/events/GeofenceEventHandler.java b/src/main/java/org/traccar/handler/events/GeofenceEventHandler.java
new file mode 100644
index 000000000..067c97957
--- /dev/null
+++ b/src/main/java/org/traccar/handler/events/GeofenceEventHandler.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2016 - 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.handler.events;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.database.CalendarManager;
+import org.traccar.database.GeofenceManager;
+import org.traccar.database.IdentityManager;
+import org.traccar.model.Calendar;
+import org.traccar.model.Device;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class GeofenceEventHandler extends BaseEventHandler {
+
+    private final IdentityManager identityManager;
+    private final GeofenceManager geofenceManager;
+    private final CalendarManager calendarManager;
+
+    public GeofenceEventHandler(
+            IdentityManager identityManager, GeofenceManager geofenceManager, CalendarManager calendarManager) {
+        this.identityManager = identityManager;
+        this.geofenceManager = geofenceManager;
+        this.calendarManager = calendarManager;
+    }
+
+    @Override
+    protected Map<Event, Position> analyzePosition(Position position) {
+        Device device = identityManager.getById(position.getDeviceId());
+        if (device == null) {
+            return null;
+        }
+        if (!identityManager.isLatestPosition(position) || !position.getValid()) {
+            return null;
+        }
+
+        List<Long> currentGeofences = geofenceManager.getCurrentDeviceGeofences(position);
+        List<Long> oldGeofences = new ArrayList<>();
+        if (device.getGeofenceIds() != null) {
+            oldGeofences.addAll(device.getGeofenceIds());
+        }
+        List<Long> newGeofences = new ArrayList<>(currentGeofences);
+        newGeofences.removeAll(oldGeofences);
+        oldGeofences.removeAll(currentGeofences);
+
+        device.setGeofenceIds(currentGeofences);
+
+        Map<Event, Position> events = new HashMap<>();
+        for (long geofenceId : oldGeofences) {
+            long calendarId = geofenceManager.getById(geofenceId).getCalendarId();
+            Calendar calendar = calendarId != 0 ? calendarManager.getById(calendarId) : null;
+            if (calendar == null || calendar.checkMoment(position.getFixTime())) {
+                Event event = new Event(Event.TYPE_GEOFENCE_EXIT, position.getDeviceId(), position.getId());
+                event.setGeofenceId(geofenceId);
+                events.put(event, position);
+            }
+        }
+        for (long geofenceId : newGeofences) {
+            long calendarId = geofenceManager.getById(geofenceId).getCalendarId();
+            Calendar calendar = calendarId != 0 ? calendarManager.getById(calendarId) : null;
+            if (calendar == null || calendar.checkMoment(position.getFixTime())) {
+                Event event = new Event(Event.TYPE_GEOFENCE_ENTER, position.getDeviceId(), position.getId());
+                event.setGeofenceId(geofenceId);
+                events.put(event, position);
+            }
+        }
+        return events;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/events/IgnitionEventHandler.java b/src/main/java/org/traccar/handler/events/IgnitionEventHandler.java
new file mode 100644
index 000000000..ec133bafc
--- /dev/null
+++ b/src/main/java/org/traccar/handler/events/IgnitionEventHandler.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2016 - 2019 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 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.handler.events;
+
+import java.util.Collections;
+import java.util.Map;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.database.IdentityManager;
+import org.traccar.model.Device;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class IgnitionEventHandler extends BaseEventHandler {
+
+    private final IdentityManager identityManager;
+
+    public IgnitionEventHandler(IdentityManager identityManager) {
+        this.identityManager = identityManager;
+    }
+
+    @Override
+    protected Map<Event, Position> analyzePosition(Position position) {
+        Device device = identityManager.getById(position.getDeviceId());
+        if (device == null || !identityManager.isLatestPosition(position)) {
+            return null;
+        }
+
+        Map<Event, Position> result = null;
+
+        if (position.getAttributes().containsKey(Position.KEY_IGNITION)) {
+            boolean ignition = position.getBoolean(Position.KEY_IGNITION);
+
+            Position lastPosition = identityManager.getLastPosition(position.getDeviceId());
+            if (lastPosition != null && lastPosition.getAttributes().containsKey(Position.KEY_IGNITION)) {
+                boolean oldIgnition = lastPosition.getBoolean(Position.KEY_IGNITION);
+
+                if (ignition && !oldIgnition) {
+                    result = Collections.singletonMap(
+                            new Event(Event.TYPE_IGNITION_ON, position.getDeviceId(), position.getId()), position);
+                } else if (!ignition && oldIgnition) {
+                    result = Collections.singletonMap(
+                            new Event(Event.TYPE_IGNITION_OFF, position.getDeviceId(), position.getId()), position);
+                }
+            }
+        }
+        return result;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/events/MaintenanceEventHandler.java b/src/main/java/org/traccar/handler/events/MaintenanceEventHandler.java
new file mode 100644
index 000000000..93ae74142
--- /dev/null
+++ b/src/main/java/org/traccar/handler/events/MaintenanceEventHandler.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 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.handler.events;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.database.IdentityManager;
+import org.traccar.database.MaintenancesManager;
+import org.traccar.model.Event;
+import org.traccar.model.Maintenance;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class MaintenanceEventHandler extends BaseEventHandler {
+
+    private final IdentityManager identityManager;
+    private final MaintenancesManager maintenancesManager;
+
+    public MaintenanceEventHandler(IdentityManager identityManager, MaintenancesManager maintenancesManager) {
+        this.identityManager = identityManager;
+        this.maintenancesManager = maintenancesManager;
+    }
+
+    @Override
+    protected Map<Event, Position> analyzePosition(Position position) {
+        if (identityManager.getById(position.getDeviceId()) == null
+                || !identityManager.isLatestPosition(position)) {
+            return null;
+        }
+
+        Position lastPosition = identityManager.getLastPosition(position.getDeviceId());
+        if (lastPosition == null) {
+            return null;
+        }
+
+        Map<Event, Position> events = new HashMap<>();
+        for (long maintenanceId : maintenancesManager.getAllDeviceItems(position.getDeviceId())) {
+            Maintenance maintenance = maintenancesManager.getById(maintenanceId);
+            if (maintenance.getPeriod() != 0) {
+                double oldValue = lastPosition.getDouble(maintenance.getType());
+                double newValue = position.getDouble(maintenance.getType());
+                if (oldValue != 0.0 && newValue != 0.0
+                        && (long) ((oldValue - maintenance.getStart()) / maintenance.getPeriod())
+                        < (long) ((newValue - maintenance.getStart()) / maintenance.getPeriod())) {
+                    Event event = new Event(Event.TYPE_MAINTENANCE, position.getDeviceId(), position.getId());
+                    event.setMaintenanceId(maintenanceId);
+                    event.set(maintenance.getType(), newValue);
+                    events.put(event, position);
+                }
+            }
+        }
+
+        return events;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/events/MotionEventHandler.java b/src/main/java/org/traccar/handler/events/MotionEventHandler.java
new file mode 100644
index 000000000..9ec02ccfb
--- /dev/null
+++ b/src/main/java/org/traccar/handler/events/MotionEventHandler.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright 2016 - 2019 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.handler.events;
+
+import java.util.Collections;
+import java.util.Map;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.database.DeviceManager;
+import org.traccar.database.IdentityManager;
+import org.traccar.model.Device;
+import org.traccar.model.DeviceState;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+import org.traccar.reports.ReportUtils;
+import org.traccar.reports.model.TripsConfig;
+
+@ChannelHandler.Sharable
+public class MotionEventHandler extends BaseEventHandler {
+
+    private final IdentityManager identityManager;
+    private final DeviceManager deviceManager;
+    private final TripsConfig tripsConfig;
+
+    public MotionEventHandler(IdentityManager identityManager, DeviceManager deviceManager, TripsConfig tripsConfig) {
+        this.identityManager = identityManager;
+        this.deviceManager = deviceManager;
+        this.tripsConfig = tripsConfig;
+    }
+
+    private Map<Event, Position> newEvent(DeviceState deviceState, boolean newMotion) {
+        String eventType = newMotion ? Event.TYPE_DEVICE_MOVING : Event.TYPE_DEVICE_STOPPED;
+        Position position = deviceState.getMotionPosition();
+        Event event = new Event(eventType, position.getDeviceId(), position.getId());
+        deviceState.setMotionState(newMotion);
+        deviceState.setMotionPosition(null);
+        return Collections.singletonMap(event, position);
+    }
+
+    public Map<Event, Position> updateMotionState(DeviceState deviceState) {
+        Map<Event, Position> result = null;
+        if (deviceState.getMotionState() != null && deviceState.getMotionPosition() != null) {
+            boolean newMotion = !deviceState.getMotionState();
+            Position motionPosition = deviceState.getMotionPosition();
+            long currentTime = System.currentTimeMillis();
+            long motionTime = motionPosition.getFixTime().getTime()
+                    + (newMotion ? tripsConfig.getMinimalTripDuration() : tripsConfig.getMinimalParkingDuration());
+            if (motionTime <= currentTime) {
+                result = newEvent(deviceState, newMotion);
+            }
+        }
+        return result;
+    }
+
+    public Map<Event, Position> updateMotionState(DeviceState deviceState, Position position) {
+        return updateMotionState(deviceState, position, position.getBoolean(Position.KEY_MOTION));
+    }
+
+    public Map<Event, Position> updateMotionState(DeviceState deviceState, Position position, boolean newMotion) {
+        Map<Event, Position> result = null;
+        Boolean oldMotion = deviceState.getMotionState();
+
+        long currentTime = position.getFixTime().getTime();
+        if (newMotion != oldMotion) {
+            if (deviceState.getMotionPosition() == null) {
+                deviceState.setMotionPosition(position);
+            }
+        } else {
+            deviceState.setMotionPosition(null);
+        }
+
+        Position motionPosition = deviceState.getMotionPosition();
+        if (motionPosition != null) {
+            long motionTime = motionPosition.getFixTime().getTime();
+            double distance = ReportUtils.calculateDistance(motionPosition, position, false);
+            Boolean ignition = null;
+            if (tripsConfig.getUseIgnition()
+                    && position.getAttributes().containsKey(Position.KEY_IGNITION)) {
+                ignition = position.getBoolean(Position.KEY_IGNITION);
+            }
+            if (newMotion) {
+                if (motionTime + tripsConfig.getMinimalTripDuration() <= currentTime
+                        || distance >= tripsConfig.getMinimalTripDistance()) {
+                    result = newEvent(deviceState, newMotion);
+                }
+            } else {
+                if (motionTime + tripsConfig.getMinimalParkingDuration() <= currentTime
+                        || ignition != null && !ignition) {
+                    result = newEvent(deviceState, newMotion);
+                }
+            }
+        }
+        return result;
+    }
+
+    @Override
+    protected Map<Event, Position> analyzePosition(Position position) {
+
+        long deviceId = position.getDeviceId();
+        Device device = identityManager.getById(deviceId);
+        if (device == null) {
+            return null;
+        }
+        if (!identityManager.isLatestPosition(position)
+                || !tripsConfig.getProcessInvalidPositions() && !position.getValid()) {
+            return null;
+        }
+
+        Map<Event, Position> result = null;
+        DeviceState deviceState = deviceManager.getDeviceState(deviceId);
+
+        if (deviceState.getMotionState() == null) {
+            deviceState.setMotionState(position.getBoolean(Position.KEY_MOTION));
+        } else {
+            result = updateMotionState(deviceState, position);
+        }
+        deviceManager.setDeviceState(deviceId, deviceState);
+        return result;
+    }
+
+}
diff --git a/src/main/java/org/traccar/handler/events/OverspeedEventHandler.java b/src/main/java/org/traccar/handler/events/OverspeedEventHandler.java
new file mode 100644
index 000000000..157bb64e0
--- /dev/null
+++ b/src/main/java/org/traccar/handler/events/OverspeedEventHandler.java
@@ -0,0 +1,164 @@
+/*
+ * Copyright 2016 - 2019 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.handler.events;
+
+import java.util.Collections;
+import java.util.Map;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+import org.traccar.database.DeviceManager;
+import org.traccar.database.GeofenceManager;
+import org.traccar.model.Device;
+import org.traccar.model.DeviceState;
+import org.traccar.model.Event;
+import org.traccar.model.Geofence;
+import org.traccar.model.Position;
+
+@ChannelHandler.Sharable
+public class OverspeedEventHandler extends BaseEventHandler {
+
+    public static final String ATTRIBUTE_SPEED = "speed";
+    public static final String ATTRIBUTE_SPEED_LIMIT = "speedLimit";
+
+    private final DeviceManager deviceManager;
+    private final GeofenceManager geofenceManager;
+
+    private final boolean notRepeat;
+    private final long minimalDuration;
+    private final boolean preferLowest;
+
+    public OverspeedEventHandler(Config config, DeviceManager deviceManager, GeofenceManager geofenceManager) {
+        this.deviceManager = deviceManager;
+        this.geofenceManager = geofenceManager;
+        notRepeat = config.getBoolean(Keys.EVENT_OVERSPEED_NOT_REPEAT);
+        minimalDuration = config.getLong(Keys.EVENT_OVERSPEED_MINIMAL_DURATION) * 1000;
+        preferLowest = config.getBoolean(Keys.EVENT_OVERSPEED_PREFER_LOWEST);
+    }
+
+    private Map<Event, Position> newEvent(DeviceState deviceState, double speedLimit) {
+        Position position = deviceState.getOverspeedPosition();
+        Event event = new Event(Event.TYPE_DEVICE_OVERSPEED, position.getDeviceId(), position.getId());
+        event.set(ATTRIBUTE_SPEED, deviceState.getOverspeedPosition().getSpeed());
+        event.set(ATTRIBUTE_SPEED_LIMIT, speedLimit);
+        event.setGeofenceId(deviceState.getOverspeedGeofenceId());
+        deviceState.setOverspeedState(notRepeat);
+        deviceState.setOverspeedPosition(null);
+        deviceState.setOverspeedGeofenceId(0);
+        return Collections.singletonMap(event, position);
+    }
+
+    public Map<Event, Position> updateOverspeedState(DeviceState deviceState, double speedLimit) {
+        Map<Event, Position> result = null;
+        if (deviceState.getOverspeedState() != null && !deviceState.getOverspeedState()
+                && deviceState.getOverspeedPosition() != null && speedLimit != 0) {
+            long currentTime = System.currentTimeMillis();
+            Position overspeedPosition = deviceState.getOverspeedPosition();
+            long overspeedTime = overspeedPosition.getFixTime().getTime();
+            if (overspeedTime + minimalDuration <= currentTime) {
+                result = newEvent(deviceState, speedLimit);
+            }
+        }
+        return result;
+    }
+
+    public Map<Event, Position> updateOverspeedState(
+            DeviceState deviceState, Position position, double speedLimit, long geofenceId) {
+        Map<Event, Position> result = null;
+
+        Boolean oldOverspeed = deviceState.getOverspeedState();
+
+        long currentTime = position.getFixTime().getTime();
+        boolean newOverspeed = position.getSpeed() > speedLimit;
+        if (newOverspeed && !oldOverspeed) {
+            if (deviceState.getOverspeedPosition() == null) {
+                deviceState.setOverspeedPosition(position);
+                deviceState.setOverspeedGeofenceId(geofenceId);
+            }
+        } else if (oldOverspeed && !newOverspeed) {
+            deviceState.setOverspeedState(false);
+            deviceState.setOverspeedPosition(null);
+            deviceState.setOverspeedGeofenceId(0);
+        } else {
+            deviceState.setOverspeedPosition(null);
+            deviceState.setOverspeedGeofenceId(0);
+        }
+        Position overspeedPosition = deviceState.getOverspeedPosition();
+        if (overspeedPosition != null) {
+            long overspeedTime = overspeedPosition.getFixTime().getTime();
+            if (newOverspeed && overspeedTime + minimalDuration <= currentTime) {
+                result = newEvent(deviceState, speedLimit);
+            }
+        }
+        return result;
+    }
+
+    @Override
+    protected Map<Event, Position> analyzePosition(Position position) {
+
+        long deviceId = position.getDeviceId();
+        Device device = deviceManager.getById(deviceId);
+        if (device == null) {
+            return null;
+        }
+        if (!deviceManager.isLatestPosition(position) || !position.getValid()) {
+            return null;
+        }
+
+        double speedLimit = deviceManager.lookupAttributeDouble(deviceId, ATTRIBUTE_SPEED_LIMIT, 0, false);
+
+        double geofenceSpeedLimit = 0;
+        long overspeedGeofenceId = 0;
+
+        if (geofenceManager != null && device.getGeofenceIds() != null) {
+            for (long geofenceId : device.getGeofenceIds()) {
+                Geofence geofence = geofenceManager.getById(geofenceId);
+                if (geofence != null) {
+                    double currentSpeedLimit = geofence.getDouble(ATTRIBUTE_SPEED_LIMIT);
+                    if (currentSpeedLimit > 0 && geofenceSpeedLimit == 0
+                            || preferLowest && currentSpeedLimit < geofenceSpeedLimit
+                            || !preferLowest && currentSpeedLimit > geofenceSpeedLimit) {
+                        geofenceSpeedLimit = currentSpeedLimit;
+                        overspeedGeofenceId = geofenceId;
+                    }
+                }
+            }
+        }
+        if (geofenceSpeedLimit > 0) {
+            speedLimit = geofenceSpeedLimit;
+        }
+
+        if (speedLimit == 0) {
+            return null;
+        }
+
+        Map<Event, Position> result = null;
+        DeviceState deviceState = deviceManager.getDeviceState(deviceId);
+
+        if (deviceState.getOverspeedState() == null) {
+            deviceState.setOverspeedState(position.getSpeed() > speedLimit);
+            deviceState.setOverspeedGeofenceId(position.getSpeed() > speedLimit ? overspeedGeofenceId : 0);
+        } else {
+            result = updateOverspeedState(deviceState, position, speedLimit, overspeedGeofenceId);
+        }
+
+        deviceManager.setDeviceState(deviceId, deviceState);
+        return result;
+    }
+
+}