Merge pull request #95 from testmycode/background-comet

Do all comet connection attempts in a background thread.

Author: jamo

tmc-plugin/src/fi/helsinki/cs/tmc/model/PushEventListener.java

@@ -55,15 +55,13 @@ public static void start() {
         this.eventBus = TmcEventBus.getDefault();
         this.shouldReconnect = false;
 
-        initClientIfPossible();
-        
         this.eventBus.subscribeDependent(new TmcEventListener() {
             public void receive(TmcSettings.SavedEvent e) {
-                reconnect();
+                reconnectSoon();
             }
 
             public void receive(CourseDb.ChangedEvent e) {
-                reconnect();
+                reconnectSoon();
             }
         }, this);
 
@@ -73,14 +71,25 @@ public void receive(CourseDb.ChangedEvent e) {
             public void run() {
                 ensureConnected();
             }
-        }, CONNECTION_CHECK_INTERVAL);
+        }, 0, CONNECTION_CHECK_INTERVAL);
     }
 
     private synchronized void ensureConnected() {
-        if (client != null && client.isDisconnected()) {
+        if (client == null || client.isDisconnected()) {
             initClientIfPossible();
         }
     }
+
+    private void reconnectSoon() {
+        Thread t = new Thread() {
+            @Override
+            public void run() {
+                reconnect();
+            }
+        };
+        t.setDaemon(true);
+        t.start();
+    }
 
     private synchronized void reconnect() {
         if (client != null && client.isConnected()) {