Added reading of these parameters in configuration properties file:

dead_broadcast_viewing_period = 10
service_threadpool_size = 4
postback_threadpool_size = 3
postback_max_queue_size = 1999
postback_max_batch_size = 99

src/altk/comm/engine/CommEngine.java

@@ -35,7 +35,12 @@ public abstract class CommEngine extends HttpServlet
     private static final int SCHEDULER_THREAD_POOL_SIZE = 1;
     
     private static final long DEAD_BROADCAST_VIEWING_PERIOD_DEFAULT = 60;
-    
+
+    private static final int SERVICE_THREADPOOL_SIZE_DEFAULT = 1;
+
+    private static final int POSTBACK_THREADPOOL_SIZE_DEFAULT = 2;
+    private static final int POSTBACK_MAX_QUEUE_SIZE_DEFAULT = 10000;
+    private static final int POSTBACK_MAX_BATCH_SIZE_DEFAULT = 100;
     /**
      * Maps a broadcastId to a broadcast.
      */
@@ -69,6 +74,14 @@ public abstract class CommEngine extends HttpServlet
 
     private int completedJobCount = 0;
 
+    private int serviceThreadPoolSize;
+
+    private int postbackMaxQueueSize;
+
+    private int postbackSenderPoolSize;
+
+    private int postbackMaxBatchSize;
+
     abstract protected Broadcast mkBroadcast();
     
     public CommEngine(String engineName)
@@ -118,6 +131,26 @@ public abstract class CommEngine extends HttpServlet
         deadBroadcastViewingMinutes = Long.parseLong(periodStr);
         CommonLogger.startup.info(String.format("Dead broadcast viewing period: %d minutes", deadBroadcastViewingMinutes));
 
+        String str = config.getProperty("service_threadpool_size",
+                new Integer(SERVICE_THREADPOOL_SIZE_DEFAULT).toString());
+        serviceThreadPoolSize = Integer.parseInt(str);
+        CommonLogger.startup.info(String.format("service thread pool size: %d", serviceThreadPoolSize));
+
+        String string = config.getProperty("postback_max_queue_size",
+                new Integer(POSTBACK_MAX_QUEUE_SIZE_DEFAULT).toString());
+        postbackMaxQueueSize  = Integer.parseInt(string);
+        CommonLogger.activity.info("Postback max queue size = " + postbackMaxQueueSize);
+
+        string = config.getProperty("postback_threadpool_size",
+                new Integer(POSTBACK_THREADPOOL_SIZE_DEFAULT).toString());
+        postbackSenderPoolSize = Integer.parseInt(string);
+        CommonLogger.activity.info("Postback threadpool size = " + postbackSenderPoolSize);
+        
+        string = config.getProperty("postback_max_batch_size",
+                new Integer(POSTBACK_MAX_BATCH_SIZE_DEFAULT).toString());
+        postbackMaxBatchSize = Integer.parseInt(string);
+        CommonLogger.activity.info("Postback max batch size = " + postbackMaxBatchSize);
+        
         scheduler = Executors.newScheduledThreadPool(SCHEDULER_THREAD_POOL_SIZE);
         scheduler.scheduleAtFixedRate(new Runnable() { public void run() { purgeStaleBroadcasts();}},
                 deadBroadcastViewingMinutes, deadBroadcastViewingMinutes, TimeUnit.MINUTES);
@@ -153,9 +186,11 @@ public abstract class CommEngine extends HttpServlet
     @Override
     protected void doPost(HttpServletRequest request, HttpServletResponse response)
     {
+        myException = null;
         try
         {
             Broadcast broadcast = mkBroadcast();
+            broadcast.setServiceThreadPoolsize(serviceThreadPoolSize);
             try
             {
                 broadcast.decode(request, notInService);
@@ -178,7 +213,8 @@ public abstract class CommEngine extends HttpServlet
                     postBack = postBackMap.get(postBackURL);
                     if (postBack == null)
                     {
-                        postBack = new PostBack(postBackURL, broadcast.broadcastType + "_status");
+                        postBack = new PostBack(postBackURL, broadcast.broadcastType + "_status",
+                                postbackMaxQueueSize, postbackSenderPoolSize, postbackMaxBatchSize);
                         postBackMap.put(postBackURL, postBack);
                     }
                 }
@@ -206,7 +242,7 @@ public abstract class CommEngine extends HttpServlet
             {
                 // Put broadcast in broadcasts map.
                 String broadcastId = broadcast.getBroadcastId();
-                if (broadcastId.length() != 0)
+                if (broadcastId != null && broadcastId.length() != 0)
                 {
                     broadcasts.put(broadcastId, broadcast);            
                 }