Integrate broadcast service

5 files changed, 253 insertions, 106 deletions

diff --git a/src/main/java/org/traccar/broadcast/DeviceStatus.java b/src/main/java/org/traccar/broadcast/BroadcastInterface.java
index 4f0143319..d5b49f213 100644
--- a/src/main/java/org/traccar/broadcast/DeviceStatus.java
+++ b/src/main/java/org/traccar/broadcast/BroadcastInterface.java
@@ -15,38 +15,27 @@
  */
 package org.traccar.broadcast;
 
-import java.util.Date;
+import org.traccar.model.BaseModel;
+import org.traccar.model.Device;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
 
-public class DeviceStatus {
+public interface BroadcastInterface {
 
-    private long deviceId;
-
-    public long getDeviceId() {
-        return deviceId;
-    }
-
-    public void setDeviceId(long deviceId) {
-        this.deviceId = deviceId;
+    default void updateDevice(Device device) {
     }
 
-    private String status;
-
-    public String getStatus() {
-        return status;
+    default void updatePosition(Position position) {
     }
 
-    public void setStatus(String status) {
-        this.status = status;
+    default void updateEvent(long userId, Event event) {
     }
 
-    private Date lastUpdate;
-
-    public Date getLastUpdate() {
-        return this.lastUpdate;
+    default void invalidateObject(Class<? extends BaseModel> clazz, long id) {
     }
 
-    public void setLastUpdate(Date lastUpdate) {
-        this.lastUpdate = lastUpdate;
+    default void invalidatePermission(
+            Class<? extends BaseModel> clazz1, long id1,
+            Class<? extends BaseModel> clazz2, long id2) {
     }
-
 }
diff --git a/src/main/java/org/traccar/broadcast/BroadcastMessage.java b/src/main/java/org/traccar/broadcast/BroadcastMessage.java
index 6b103f373..3e22be7e0 100644
--- a/src/main/java/org/traccar/broadcast/BroadcastMessage.java
+++ b/src/main/java/org/traccar/broadcast/BroadcastMessage.java
@@ -15,18 +15,22 @@
  */
 package org.traccar.broadcast;
 
+import org.traccar.model.Device;
+import org.traccar.model.Event;
 import org.traccar.model.Position;
 
+import java.util.Map;
+
 public class BroadcastMessage {
 
-    private DeviceStatus deviceStatus;
+    private Device device;
 
-    public DeviceStatus getDeviceStatus() {
-        return deviceStatus;
+    public Device getDevice() {
+        return device;
     }
 
-    public void setDeviceStatus(DeviceStatus deviceStatus) {
-        this.deviceStatus = deviceStatus;
+    public void setDevice(Device device) {
+        this.device = device;
     }
 
     private Position position;
@@ -39,4 +43,33 @@ public class BroadcastMessage {
         this.position = position;
     }
 
+    private Long userId;
+
+    public Long getUserId() {
+        return userId;
+    }
+
+    public void setUserId(Long userId) {
+        this.userId = userId;
+    }
+
+    private Event event;
+
+    public Event getEvent() {
+        return event;
+    }
+
+    public void setEvent(Event event) {
+        this.event = event;
+    }
+
+    private Map<String, Long> changes;
+
+    public Map<String, Long> getChanges() {
+        return changes;
+    }
+
+    public void setChanges(Map<String, Long> changes) {
+        this.changes = changes;
+    }
 }
diff --git a/src/main/java/org/traccar/broadcast/BroadcastService.java b/src/main/java/org/traccar/broadcast/BroadcastService.java
index 26e38400b..8a2e4bafc 100644
--- a/src/main/java/org/traccar/broadcast/BroadcastService.java
+++ b/src/main/java/org/traccar/broadcast/BroadcastService.java
@@ -15,84 +15,8 @@
  */
 package org.traccar.broadcast;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.traccar.LifecycleObject;
-import org.traccar.config.Config;
-import org.traccar.config.Keys;
-
-import java.io.IOException;
-import java.net.DatagramPacket;
-import java.net.DatagramSocket;
-import java.net.InetAddress;
-import java.net.MulticastSocket;
-import java.nio.charset.StandardCharsets;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-
-public class BroadcastService implements LifecycleObject {
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(BroadcastService.class);
-
-    private final ObjectMapper objectMapper;
-
-    private final InetAddress address;
-    private final int port;
-
-    private DatagramSocket publisherSocket;
-
-    private final ExecutorService service = Executors.newSingleThreadExecutor();
-    private final byte[] receiverBuffer = new byte[4096];
-
-    public BroadcastService(Config config, ObjectMapper objectMapper) throws IOException {
-        this.objectMapper = objectMapper;
-        address = InetAddress.getByName(config.getString(Keys.BROADCAST_ADDRESS));
-        port = config.getInteger(Keys.BROADCAST_PORT);
-    }
-
-    public void sendMessage(BroadcastMessage message) throws IOException {
-        byte[] buffer = objectMapper.writeValueAsString(message).getBytes(StandardCharsets.UTF_8);
-        DatagramPacket packet = new DatagramPacket(buffer, buffer.length, address, port);
-        publisherSocket.send(packet);
-    }
-
-    private void handleMessage(BroadcastMessage message) {
-        if (message.getDeviceStatus() != null) {
-            LOGGER.info("Broadcast received device {}", message.getDeviceStatus().getDeviceId());
-        } else if (message.getPosition() != null) {
-            LOGGER.info("Broadcast received position {}", message.getPosition().getDeviceId());
-        }
-    }
-
-    @Override
-    public void start() throws IOException {
-        service.submit(receiver);
-        publisherSocket = new DatagramSocket();
-    }
-
-    @Override
-    public void stop() {
-        publisherSocket.close();
-        service.shutdown();
-    }
-
-    private final Runnable receiver = new Runnable() {
-        @Override
-        public void run() {
-            try (MulticastSocket socket = new MulticastSocket(port)) {
-                socket.joinGroup(address);
-                while (!service.isShutdown()) {
-                    DatagramPacket packet = new DatagramPacket(receiverBuffer, receiverBuffer.length);
-                    socket.receive(packet);
-                    String data = new String(packet.getData(), 0, packet.getLength(), StandardCharsets.UTF_8);
-                    handleMessage(objectMapper.readValue(data, BroadcastMessage.class));
-                }
-                socket.leaveGroup(address);
-            } catch (IOException e) {
-                throw new RuntimeException(e);
-            }
-        }
-    };
 
+public interface BroadcastService extends LifecycleObject, BroadcastInterface {
+    void registerListener(BroadcastInterface listener);
 }
diff --git a/src/main/java/org/traccar/broadcast/MulticastBroadcastService.java b/src/main/java/org/traccar/broadcast/MulticastBroadcastService.java
new file mode 100644
index 000000000..0525fa742
--- /dev/null
+++ b/src/main/java/org/traccar/broadcast/MulticastBroadcastService.java
@@ -0,0 +1,170 @@
+/*
+ * 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.broadcast;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+import org.traccar.model.BaseModel;
+import org.traccar.model.Device;
+import org.traccar.model.Event;
+import org.traccar.model.Permission;
+import org.traccar.model.Position;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.MulticastSocket;
+import java.nio.charset.StandardCharsets;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+public class MulticastBroadcastService implements BroadcastService {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(MulticastBroadcastService.class);
+
+    private final ObjectMapper objectMapper;
+
+    private final InetAddress address;
+    private final int port;
+
+    private DatagramSocket publisherSocket;
+
+    private final ExecutorService service = Executors.newSingleThreadExecutor();
+    private final byte[] receiverBuffer = new byte[4096];
+
+    private final Set<BroadcastInterface> listeners = new HashSet<>();
+
+    public MulticastBroadcastService(Config config, ObjectMapper objectMapper) throws IOException {
+        this.objectMapper = objectMapper;
+        address = InetAddress.getByName(config.getString(Keys.BROADCAST_ADDRESS));
+        port = config.getInteger(Keys.BROADCAST_PORT);
+    }
+
+    @Override
+    public void registerListener(BroadcastInterface listener) {
+        listeners.add(listener);
+    }
+
+    @Override
+    public void updateDevice(Device device) {
+        BroadcastMessage message = new BroadcastMessage();
+        message.setDevice(device);
+        sendMessage(message);
+    }
+
+    @Override
+    public void updatePosition(Position position) {
+        BroadcastMessage message = new BroadcastMessage();
+        message.setPosition(position);
+        sendMessage(message);
+    }
+
+    @Override
+    public void updateEvent(long userId, Event event) {
+        BroadcastMessage message = new BroadcastMessage();
+        message.setUserId(userId);
+        message.setEvent(event);
+        sendMessage(message);
+    }
+
+    @Override
+    public void invalidateObject(Class<? extends BaseModel> clazz, long id) {
+        BroadcastMessage message = new BroadcastMessage();
+        message.setChanges(Map.of(Permission.getKey(clazz), id));
+        sendMessage(message);
+    }
+
+    @Override
+    public void invalidatePermission(
+            Class<? extends BaseModel> clazz1, long id1,
+            Class<? extends BaseModel> clazz2, long id2) {
+        BroadcastMessage message = new BroadcastMessage();
+        message.setChanges(Map.of(Permission.getKey(clazz1), id1, Permission.getKey(clazz2), id2));
+        sendMessage(message);
+    }
+
+    private void sendMessage(BroadcastMessage message) {
+        try {
+            byte[] buffer = objectMapper.writeValueAsString(message).getBytes(StandardCharsets.UTF_8);
+            DatagramPacket packet = new DatagramPacket(buffer, buffer.length, address, port);
+            publisherSocket.send(packet);
+        } catch (IOException e) {
+            LOGGER.warn("Broadcast failed", e);
+        }
+    }
+
+    private void handleMessage(BroadcastMessage message) {
+        if (message.getDevice() != null) {
+            listeners.forEach(listener -> listener.updateDevice(message.getDevice()));
+        } else if (message.getPosition() != null) {
+            listeners.forEach(listener -> listener.updatePosition(message.getPosition()));
+        } else if (message.getUserId() != null && message.getEvent() != null) {
+            listeners.forEach(listener -> listener.updateEvent(message.getUserId(), message.getEvent()));
+        } else if (message.getChanges() != null) {
+            var iterator = message.getChanges().entrySet().iterator();
+            if (iterator.hasNext()) {
+                var first = iterator.next();
+                if (iterator.hasNext()) {
+                    var second = iterator.next();
+                    listeners.forEach(listener -> listener.invalidatePermission(
+                            Permission.getKeyClass(first.getKey()), first.getValue(),
+                            Permission.getKeyClass(second.getKey()), second.getValue()));
+                } else {
+                    listeners.forEach(listener -> listener.invalidateObject(
+                            Permission.getKeyClass(first.getKey()), first.getValue()));
+                }
+            }
+        }
+    }
+
+    @Override
+    public void start() throws IOException {
+        service.submit(receiver);
+        publisherSocket = new DatagramSocket();
+    }
+
+    @Override
+    public void stop() {
+        publisherSocket.close();
+        service.shutdown();
+    }
+
+    private final Runnable receiver = new Runnable() {
+        @SuppressWarnings("deprecation")
+        @Override
+        public void run() {
+            try (MulticastSocket socket = new MulticastSocket(port)) {
+                socket.joinGroup(address);
+                while (!service.isShutdown()) {
+                    DatagramPacket packet = new DatagramPacket(receiverBuffer, receiverBuffer.length);
+                    socket.receive(packet);
+                    String data = new String(packet.getData(), 0, packet.getLength(), StandardCharsets.UTF_8);
+                    handleMessage(objectMapper.readValue(data, BroadcastMessage.class));
+                }
+                socket.leaveGroup(address);
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    };
+}
diff --git a/src/main/java/org/traccar/broadcast/NullBroadcastService.java b/src/main/java/org/traccar/broadcast/NullBroadcastService.java
new file mode 100644
index 000000000..3f41299db
--- /dev/null
+++ b/src/main/java/org/traccar/broadcast/NullBroadcastService.java
@@ -0,0 +1,31 @@
+/*
+ * 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.broadcast;
+
+public class NullBroadcastService implements BroadcastService {
+
+    @Override
+    public void registerListener(BroadcastInterface listener) {
+    }
+
+    @Override
+    public void start() throws Exception {
+    }
+
+    @Override
+    public void stop() throws Exception {
+    }
+}