Active devices in connection manager

1 files changed, 111 insertions, 0 deletions

diff --git a/src/org/traccar/database/ConnectionManager.java b/src/org/traccar/database/ConnectionManager.java
new file mode 100644
index 000000000..7ef190fcf
--- /dev/null
+++ b/src/org/traccar/database/ConnectionManager.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.traccar.database;
+
+import java.net.SocketAddress;
+import java.sql.SQLException;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.jboss.netty.channel.Channel;
+import org.traccar.Protocol;
+import org.traccar.helper.Log;
+import org.traccar.model.Position;
+
+public class ConnectionManager {
+
+    private Map<String, ActiveDevice> activeDevices = new HashMap<String, ActiveDevice>();
+    private final Map<Long, Position> positions = new HashMap<Long, Position>();
+    private final Map<Long, Set<DataCacheListener>> listeners = new HashMap<Long, Set<DataCacheListener>>();
+    
+    public void init(DataManager dataManager) {
+        try {
+            Collection<Position> positions = dataManager.getLatestPositions();
+            for (Position position : positions) {
+                this.positions.put(position.getDeviceId(), position);
+            }
+        } catch (SQLException error) {
+            Log.warning(error);
+        }
+    }
+
+    public void setActiveDevice(String uniqueId, Protocol protocol, Channel channel, SocketAddress remoteAddress) {
+        activeDevices.put(uniqueId, new ActiveDevice(uniqueId, protocol, channel, remoteAddress));
+    }
+
+    public ActiveDevice getActiveDevice(String uniqueId) {
+        return activeDevices.get(uniqueId);
+    }
+
+    public synchronized void update(Position position) {
+        long deviceId = position.getDeviceId();
+        positions.put(deviceId, position);
+        if (listeners.containsKey(deviceId)) {
+            for (DataCacheListener listener : listeners.get(deviceId)) {
+                listener.onUpdate(position);
+            }
+        }
+    }
+    
+    public synchronized Collection<Position> getInitialState(Collection<Long> devices) {
+        
+        List<Position> result = new LinkedList<Position>();
+        
+        for (long device : devices) {
+            if (positions.containsKey(device)) {
+                result.add(positions.get(device));
+            }
+        }
+        
+        return result;
+    }
+    
+    public static interface DataCacheListener {
+        public void onUpdate(Position position);
+    }
+    
+    public void addListener(Collection<Long> devices, DataCacheListener listener) {
+        for (long deviceId : devices) {
+            addListener(deviceId, listener);
+        }
+    }
+    
+    public synchronized void addListener(long deviceId, DataCacheListener listener) {
+        if (!listeners.containsKey(deviceId)) {
+            listeners.put(deviceId, new HashSet<DataCacheListener>());
+        }
+        listeners.get(deviceId).add(listener);
+    }
+    
+    public void removeListener(Collection<Long> devices, DataCacheListener listener) {
+        for (long deviceId : devices) {
+            removeListener(deviceId, listener);
+        }
+    }
+    
+    public synchronized void removeListener(long deviceId, DataCacheListener listener) {
+        if (!listeners.containsKey(deviceId)) {
+            listeners.put(deviceId, new HashSet<DataCacheListener>());
+        }
+        listeners.get(deviceId).remove(listener);
+    }
+    
+}