Add latest position cache

4 files changed, 110 insertions, 24 deletions

diff --git a/src/org/traccar/BasePipelineFactory.java b/src/org/traccar/BasePipelineFactory.java
index 3a8d1f48f..469bbc49f 100644
--- a/src/org/traccar/BasePipelineFactory.java
+++ b/src/org/traccar/BasePipelineFactory.java
@@ -21,26 +21,22 @@ import org.jboss.netty.buffer.ChannelBuffers;
 import org.jboss.netty.channel.*;
 import org.jboss.netty.handler.logging.LoggingHandler;
 import org.jboss.netty.handler.timeout.IdleStateHandler;
+import org.traccar.database.DataCache;
+import org.traccar.database.DataManager;
 import org.traccar.geocode.ReverseGeocoder;
 import org.traccar.helper.Log;
-import org.traccar.database.DataManager;
 
-/**
-  * Base pipeline factory
-  */
 public abstract class BasePipelineFactory implements ChannelPipelineFactory {
 
     private final TrackerServer server;
     private final DataManager dataManager;
+    private final DataCache dataCache;
     private final Boolean loggerEnabled;
     private final ReverseGeocoder reverseGeocoder;
     private FilterHandler filterHandler;
     private Integer resetDelay;
     private Boolean processInvalidPositions;
 
-    /**
-     * Open channel handler
-     */
     protected class OpenChannelHandler extends SimpleChannelHandler {
 
         private final TrackerServer server;
@@ -90,6 +86,7 @@ public abstract class BasePipelineFactory implements ChannelPipelineFactory {
     public BasePipelineFactory(ServerManager serverManager, TrackerServer server, String protocol) {
         this.server = server;
         dataManager = serverManager.getDataManager();
+        dataCache = serverManager.getDataCache();
         loggerEnabled = serverManager.isLoggerEnabled();
         reverseGeocoder = serverManager.getReverseGeocoder();
 
@@ -133,7 +130,7 @@ public abstract class BasePipelineFactory implements ChannelPipelineFactory {
         if (reverseGeocoder != null) {
             pipeline.addLast("geocoder", new ReverseGeocoderHandler(reverseGeocoder, processInvalidPositions));
         }
-        pipeline.addLast("handler", new TrackerEventHandler(dataManager));
+        pipeline.addLast("handler", new TrackerEventHandler(dataManager, dataCache));
         return pipeline;
     }
 
diff --git a/src/org/traccar/ServerManager.java b/src/org/traccar/ServerManager.java
index 184b54078..31da6848f 100644
--- a/src/org/traccar/ServerManager.java
+++ b/src/org/traccar/ServerManager.java
@@ -15,6 +15,14 @@
  */
 package org.traccar;
 
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.nio.ByteOrder;
+import java.sql.SQLException;
+import java.util.Arrays;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Properties;
 import org.jboss.netty.bootstrap.ConnectionlessBootstrap;
 import org.jboss.netty.bootstrap.ServerBootstrap;
 import org.jboss.netty.channel.ChannelPipeline;
@@ -26,21 +34,16 @@ import org.jboss.netty.handler.codec.http.HttpRequestDecoder;
 import org.jboss.netty.handler.codec.http.HttpResponseEncoder;
 import org.jboss.netty.handler.codec.string.StringDecoder;
 import org.jboss.netty.handler.codec.string.StringEncoder;
+import org.traccar.database.DataCache;
 import org.traccar.database.DataManager;
 import org.traccar.geocode.GoogleReverseGeocoder;
 import org.traccar.geocode.NominatimReverseGeocoder;
 import org.traccar.geocode.ReverseGeocoder;
 import org.traccar.helper.Log;
 import org.traccar.http.WebServer;
+import org.traccar.model.Position;
 import org.traccar.protocol.*;
 
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.nio.ByteOrder;
-import java.sql.SQLException;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Properties;
 
 /**
  * Server Manager
@@ -65,6 +68,12 @@ public class ServerManager {
         return dataManager;
     }
 
+    private DataCache dataCache;
+
+    public DataCache getDataCache() {
+        return dataCache;
+    }
+
     private ReverseGeocoder reverseGeocoder;
 
     public ReverseGeocoder getReverseGeocoder() {
@@ -98,6 +107,14 @@ public class ServerManager {
         }
 
         dataManager = new DataManager(properties);
+        dataCache = new DataCache(dataManager);
+        
+        dataCache.addListener(Arrays.asList(1l), new DataCache.DataCacheListener() {
+            @Override
+            public void onUpdate(Position position) {
+                System.out.println("position: " + position.getLatitude() + ":" + position.getLongitude());
+            }
+        });
 
         initGeocoder(properties);
 
diff --git a/src/org/traccar/TrackerEventHandler.java b/src/org/traccar/TrackerEventHandler.java
index 39c70ccc7..ecce97fa4 100644
--- a/src/org/traccar/TrackerEventHandler.java
+++ b/src/org/traccar/TrackerEventHandler.java
@@ -19,23 +19,20 @@ import java.util.List;
 import org.jboss.netty.channel.*;
 import org.jboss.netty.handler.timeout.IdleStateAwareChannelHandler;
 import org.jboss.netty.handler.timeout.IdleStateEvent;
+import org.traccar.database.DataCache;
 import org.traccar.helper.Log;
 import org.traccar.database.DataManager;
 import org.traccar.model.Position;
 
-/**
- * Tracker message handler
- */
 @ChannelHandler.Sharable
 public class TrackerEventHandler extends IdleStateAwareChannelHandler {
 
-    /**
-     * Data manager
-     */
-    private DataManager dataManager;
+    private final DataManager dataManager;
+    private final DataCache dataCache;
 
-    TrackerEventHandler(DataManager newDataManager) {
-        dataManager = newDataManager;
+    TrackerEventHandler(DataManager dataManager, DataCache dataCache) {
+        this.dataManager = dataManager;
+        this.dataCache = dataCache;
     }
 
     private Long processSinglePosition(Position position) {
@@ -77,6 +74,7 @@ public class TrackerEventHandler extends IdleStateAwareChannelHandler {
         if (lastPostition != null) {
             try {
                 dataManager.updateLatestPosition(lastPostition, id);
+                dataCache.update(lastPostition);
             } catch (Exception error) {
                 Log.warning(error);
             }
diff --git a/src/org/traccar/database/DataCache.java b/src/org/traccar/database/DataCache.java
new file mode 100644
index 000000000..f5aa3b1e9
--- /dev/null
+++ b/src/org/traccar/database/DataCache.java
@@ -0,0 +1,74 @@
+/*
+ * 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.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import org.traccar.model.Position;
+
+public class DataCache {
+    
+    private final Map<Long, Position> positions = new HashMap<Long, Position>();
+    private final Map<Long, Set<DataCacheListener>> listeners = new HashMap<Long, Set<DataCacheListener>>();
+    
+    public DataCache(DataManager dataManager) {
+        // TODO: load latest data from datavase
+    }
+    
+    public void update(Position position) {
+        long device = position.getDeviceId();
+        positions.put(device, position);
+        if (listeners.containsKey(device)) {
+            for (DataCacheListener listener : listeners.get(device)) {
+                listener.onUpdate(position);
+            }
+        }
+    }
+    
+    public static interface DataCacheListener {
+        public void onUpdate(Position position);
+    }
+    
+    public void addListener(Collection<Long> devices, DataCacheListener listener) {
+        for (long device : devices) {
+            addListener(device, listener);
+        }
+    }
+    
+    public void addListener(long device, DataCacheListener listener) {
+        if (!listeners.containsKey(device)) {
+            listeners.put(device, new HashSet<DataCacheListener>());
+        }
+        listeners.get(device).add(listener);
+    }
+    
+    public void removeListener(Collection<Long> devices, DataCacheListener listener) {
+        for (long device : devices) {
+            removeListener(device, listener);
+        }
+    }
+    
+    public void removeListener(long device, DataCacheListener listener) {
+        if (!listeners.containsKey(device)) {
+            listeners.put(device, new HashSet<DataCacheListener>());
+        }
+        listeners.get(device).remove(listener);
+    }
+    
+}