various refinements

examples/src/OpenDis7Examples/EspduReceiver.java

@@ -26,15 +26,20 @@ public class EspduReceiver
 	
     /** Default multicast port used, matches Wireshark DIS capture default */
     public static final int    DEFAULT_MULTICAST_PORT    = EspduSender.DEFAULT_MULTICAST_PORT;
+    
+	/**
+	 * Output prefix to identify this class
+	 */
+    private final static String TRACE_PREFIX = "[" + EspduReceiver.class.getName() + "] ";
 
     public static void main(String args[])
 	{
-		System.out.println("OpenDis7Examples.EspduReceiver started...");
+        System.out.println(TRACE_PREFIX + "started...");
 		
         MulticastSocket socket;
-        DatagramPacket packet;
-        InetAddress address;
-        PduFactory pduFactory = new PduFactory();
+        DatagramPacket  packet;
+        InetAddress     address;
+        PduFactory      pduFactory = new PduFactory();
         int pduCount = 0;
 
         try {
@@ -43,10 +48,11 @@ public class EspduReceiver
 //          socket.setBroadcast(true);
        
             address = InetAddress.getByName(DEFAULT_MULTICAST_ADDRESS);
-            socket.joinGroup(address);
+//////            socket.joinGroup(address); // TODO not needed!
         
-            System.out.println("OpenDis7Examples.EspduReceiver: listening for PDU packets on " + address.getHostAddress() + " port " + DEFAULT_MULTICAST_PORT);
-
+            System.out.println(TRACE_PREFIX + "listening for PDU packets on " + address.getHostAddress() + " port " + DEFAULT_MULTICAST_PORT);
+            System.out.println("===============");
+            
             while (true) // Loop infinitely, receiving datagrams
 			{
                 byte buffer[] = new byte[MAX_PDU_SIZE];
@@ -66,7 +72,6 @@ public class EspduReceiver
                            + ". received PDU type " + aPdu.getPduType().getValue() + "=" + aPdu.getPduType().name() + " " + aPdu.getClass().getName();
                     if (aPdu instanceof EntityStatePdu)
                     {
-                        System.out.println("===============");
                         System.out.println(receiptMessage);
                         EntityID      entityID = ((EntityStatePdu)aPdu).getEntityID();
                         Vector3Double position = ((EntityStatePdu)aPdu).getEntityLocation();
@@ -78,20 +83,20 @@ public class EspduReceiver
                         System.out.println(receiptMessage);
                         Vector3Double position = ((FirePdu)aPdu).getLocationInWorldCoordinates();
                         System.out.println("     FirePdu locationInWorldCoordinates: [" + position.getX() + ", " + position.getY() + ", " + position.getZ() + "]");
-                        
+                        System.out.println("===============");
                     }
                     else
                     {    
                         System.out.println(receiptMessage);
                     }
-                }
-            } // end while
+                } // end of bundle loop
+            } // end of while loop
         } // end try block
-        catch (IOException e)
+        catch (IOException ioe)
 		{
-            System.out.println("Problem with OpenDis7Examples.EspduReceiver, see exception trace:");
-            System.out.println(e);
+            System.out.println(TRACE_PREFIX + "Problem with input/output, see exception trace:");
+            System.out.println(ioe);
         }
-		System.out.println("OpenDis7Examples.EspduReceiver complete.");
+		System.out.println(TRACE_PREFIX + "complete.");
     } // end main
 } // end class