3 files changed, 68 insertions, 1 deletions
diff --git a/src/org/traccar/BasePipelineFactory.java b/src/org/traccar/BasePipelineFactory.java
index 4d8b0ffc4..216e48709 100644
--- a/src/org/traccar/BasePipelineFactory.java
+++ b/src/org/traccar/BasePipelineFactory.java
@@ -25,7 +25,6 @@ import org.jboss.netty.channel.ChannelPipelineFactory;
 import org.jboss.netty.channel.ChannelStateEvent;
 import org.jboss.netty.channel.Channels;
 import org.jboss.netty.channel.DownstreamMessageEvent;
-import org.jboss.netty.channel.ExceptionEvent;
 import org.jboss.netty.channel.MessageEvent;
 import org.jboss.netty.channel.SimpleChannelHandler;
 import org.jboss.netty.handler.logging.LoggingHandler;
@@ -38,6 +37,7 @@ public abstract class BasePipelineFactory implements ChannelPipelineFactory {
     private int resetDelay;
 
     private FilterHandler filterHandler;
+    private DistanceHandler distanceHandler;
     private ReverseGeocoderHandler reverseGeocoderHandler;
 
     protected class OpenChannelHandler extends SimpleChannelHandler {
@@ -96,6 +96,10 @@ public abstract class BasePipelineFactory implements ChannelPipelineFactory {
             reverseGeocoderHandler = new ReverseGeocoderHandler(
                     Context.getReverseGeocoder(), Context.getConfig().getBoolean("geocode.processInvalidPositions"));
         }
+
+        if (Context.getConfig().getBoolean("distance.enable")) {
+            distanceHandler = new DistanceHandler();
+        }
     }
 
     protected abstract void addSpecificHandlers(ChannelPipeline pipeline);
@@ -114,6 +118,9 @@ public abstract class BasePipelineFactory implements ChannelPipelineFactory {
         if (filterHandler != null) {
             pipeline.addLast("filter", filterHandler);
         }
+        if (distanceHandler != null) {
+            pipeline.addLast("distance", distanceHandler);
+        }
         if (reverseGeocoderHandler != null) {
             pipeline.addLast("geocoder", reverseGeocoderHandler);
         }
diff --git a/src/org/traccar/DistanceHandler.java b/src/org/traccar/DistanceHandler.java
new file mode 100644
index 000000000..57dddfe87
--- /dev/null
+++ b/src/org/traccar/DistanceHandler.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2015 Amila Silva
+ *
+ * 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;
+
+import org.traccar.helper.DistanceCalculator;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+import java.math.BigDecimal;
+
+public class DistanceHandler extends BaseDataHandler {
+
+    private Position getLastPosition(long deviceId) {
+        if (Context.getConnectionManager() != null) {
+            return Context.getConnectionManager().getLastPosition(deviceId);
+        }
+        return null;
+    }
+
+    public Position calculateDistance(Position position) {
+
+        double distance = 0.0;
+
+        Position last = getLastPosition(position.getDeviceId());
+        if (last != null) {
+            if (last.getOther().containsKey(Event.KEY_DISTANCE)) {
+                distance = ((Number) last.getOther().get(Event.KEY_DISTANCE)).doubleValue();
+            }
+
+            distance += DistanceCalculator.distance(
+                    position.getLatitude(), position.getLongitude(),
+                    last.getLatitude(), last.getLongitude());
+
+            distance = BigDecimal.valueOf(distance).setScale(2).doubleValue();
+        }
+
+        position.set(Event.KEY_DISTANCE, distance);
+        return position;
+    }
+
+    @Override
+    protected Position handlePosition(Position position) {
+        return calculateDistance(position);
+    }
+
+}
diff --git a/src/org/traccar/model/Event.java b/src/org/traccar/model/Event.java
index df9a9a8e5..831ae31b3 100644
--- a/src/org/traccar/model/Event.java
+++ b/src/org/traccar/model/Event.java
@@ -78,6 +78,7 @@ public abstract class Event {
     public static final String KEY_CHARGE = "charge";
     public static final String KEY_IP = "ip";
     public static final String KEY_ARCHIVE = "archive";
+    public static final String KEY_DISTANCE = "distance";
 
     // Starts with 1 not 0
     public static final String PREFIX_TEMP = "temp";