From 06fa2ada9247586f6b2eac7906bd9ada50c91577 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Tue, 17 Nov 2015 17:35:32 +1300
Subject: Implement timeout for device status

---
 src/org/traccar/database/ConnectionManager.java | 35 ++++++++++++++++++++++---
 1 file changed, 32 insertions(+), 3 deletions(-)

(limited to 'src/org/traccar/database')

diff --git a/src/org/traccar/database/ConnectionManager.java b/src/org/traccar/database/ConnectionManager.java
index 345bb4577..ae931151d 100644
--- a/src/org/traccar/database/ConnectionManager.java
+++ b/src/org/traccar/database/ConnectionManager.java
@@ -25,8 +25,13 @@ import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.concurrent.TimeUnit;
+
 import org.jboss.netty.channel.Channel;
+import org.jboss.netty.util.Timeout;
+import org.jboss.netty.util.TimerTask;
 import org.traccar.Context;
+import org.traccar.GlobalTimer;
 import org.traccar.Protocol;
 import org.traccar.helper.Log;
 import org.traccar.model.Device;
@@ -34,11 +39,17 @@ import org.traccar.model.Position;
 
 public class ConnectionManager {
 
+    private static final long DEFAULT_TIMEOUT = 600;
+
+    private final long deviceTimeout;
+
     private final Map<Long, ActiveDevice> activeDevices = new HashMap<>();
     private final Map<Long, Position> positions = new HashMap<>();
     private final Map<Long, Set<UpdateListener>> listeners = new HashMap<>();
+    private final Map<Long, Timeout> timeouts = new HashMap<>();
 
     public ConnectionManager(DataManager dataManager) {
+        deviceTimeout = Context.getConfig().getLong("status.timeout", DEFAULT_TIMEOUT) * 1000;
         if (dataManager != null) {
             try {
                 for (Position position : dataManager.getLatestPositions()) {
@@ -57,7 +68,7 @@ public class ConnectionManager {
     public void removeActiveDevice(Channel channel) {
         for (ActiveDevice activeDevice : activeDevices.values()) {
             if (activeDevice.getChannel() == channel) {
-                updateDevice(activeDevice.getDeviceId(), Device.STATUS_OFFLINE, new Date());
+                updateDevice(activeDevice.getDeviceId(), Device.STATUS_OFFLINE, null);
                 activeDevices.remove(activeDevice.getDeviceId());
                 break;
             }
@@ -68,10 +79,28 @@ public class ConnectionManager {
         return activeDevices.get(deviceId);
     }
 
-    public synchronized void updateDevice(long deviceId, String status, Date time) {
+    public synchronized void updateDevice(final long deviceId, String status, Date time) {
         Device device = Context.getIdentityManager().getDeviceById(deviceId);
         device.setStatus(status);
-        device.setLastUpdate(time);
+        if (time != null) {
+            device.setLastUpdate(time);
+        }
+
+        Timeout timeout = timeouts.remove(deviceId);
+        if (timeout != null) {
+            timeout.cancel();
+        }
+
+        if (status.equals(Device.STATUS_ONLINE)) {
+            timeouts.put(deviceId, GlobalTimer.getTimer().newTimeout(new TimerTask() {
+                @Override
+                public void run(Timeout timeout) throws Exception {
+                    if (!timeout.isCancelled()) {
+                        updateDevice(deviceId, Device.STATUS_UNKNOWN, null);
+                    }
+                }
+            }, deviceTimeout, TimeUnit.MILLISECONDS));
+        }
 
         try {
             Context.getDataManager().updateDeviceStatus(device);
-- 
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