Add Auto Pause feature

src/main/java/altk/comm/engine/Broadcast.java

@@ -90,6 +90,8 @@ public abstract class Broadcast
 	
 	/** Running count of successful jobs */
 	private AtomicInteger successCount;
+	private int pauseThreshold;
+	private int lastPauseCount;
 
 	
     public static enum BroadcastState
@@ -414,6 +416,7 @@ public abstract class Broadcast
         receiveTime = System.currentTimeMillis();
         serviceActivityCount = Integer.valueOf(0);
         transactions = Integer.valueOf(0);
+        lastPauseCount = 0;
     }
     
     private void incrementTransactions(int delta)
@@ -421,7 +424,12 @@ public abstract class Broadcast
     	synchronized (transactions)
     	{
     		transactions += delta;
+        	lastPauseCount += delta;
     	}
+    	if (pauseThreshold > 0 && lastPauseCount >= pauseThreshold) 
+        {
+    		pause(null);
+        }
     }
         
 	/**
@@ -459,6 +467,7 @@ public abstract class Broadcast
         myLogger.debug("Entering Broadcast.doPost method");
         BroadcastException myException = null;
         this.commEngine = commEngine;
+        pauseThreshold = commEngine.getPauseThreshold();
         try
         {
             boolean notInService = commEngine.notInService();
@@ -989,7 +998,8 @@ public abstract class Broadcast
 		// Sets state to PAUSING, which is monitored by Broadcast.Service threads.
 		// EVentually, when all service activity ends, the state transitions to PAUSED
 		setState(BroadcastState.PAUSING);
-		out.write("Broadcast paused");
+		lastPauseCount = 0;
+		if (out != null) out.write("Broadcast paused");
     }
 	
 	protected void resume(PrintWriter out)

src/main/java/altk/comm/engine/CommEngine.java

@@ -42,6 +42,10 @@ public abstract class CommEngine extends HttpServlet
     
     private static final String POSTBACK_MAX_BATCH_SIZE_KEY = "postback_max_batch_size";
     private static final int POSTBACK_MAX_BATCH_SIZE_DEFAULT = 100;
+    
+    private static final String PAUSE_THRESHOLD_KEY = "pause_threshold";
+    private static final int PAUSE_THRESHOLD_DEFAULT = 0;
+    
     /**
      * Maps a broadcastId to a broadcast.
      */
@@ -191,6 +195,19 @@ public abstract class CommEngine extends HttpServlet
         initChild();
     }
     
+	public int getPauseThreshold() 
+	{
+		return getPauseThreshold(config);
+	}
+
+    public int getPauseThreshold(Properties properties)
+    {
+    	String str = properties.
+    			getProperty(PAUSE_THRESHOLD_KEY, String.valueOf(PAUSE_THRESHOLD_DEFAULT));
+    	int pauseThreshold = Integer.valueOf(str);
+    	return pauseThreshold;
+    }
+    
     public int getServiceThreadPoolSize()
     {
     	return getServiceThreadPoolSize(config);