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| import com.latencybusters.lbm.*;
public class EventQrcv {
public static void main(String[] args) throws LBMException {
LBMContext ctx = null; /* Context object: container for UM "instance". */
LBMReceiver rcv = null; /* Source object: for sending messages. */
LBMEventQueue evq = null; /* Event Queue object: process receiver events on app thread */
LBMRcvReceiver rcvCB = null;
ctx = new LBMContext();
evq = new LBMEventQueue();
{
LBMTopic topic = null;
topic = ctx.allocTopic("test.topic");
/* The event queue object is passed into the receiver constructor */
/* This causes events to be queued in an unbounded Q. In order */
/* to process these messages the evq.Run() method must be called */
rcv = new LBMReceiver(ctx, topic, rcvCB, null, evq);
}
/* run the event queue for 60 seconds */
/* all the receiver events will be processed */
/* in this thread. This includes message */
/* processing. */
evq.run(60000);
try {
/* Shutdown order is important. Event Queues should */
/* be .close()d after the context and receiver. */
rcv.close();
ctx.close();
evq.close();
}
catch(LBMException ex)
{
System.err.println("Error closing LBM objects: " + ex.toString());
System.exit(1);
}
}
}
class LBMRcvReceiver implements LBMReceiverCallback
{
/* This on receive callback is required to process messages and */
/* other events. Normally this callback would be executed on */
/* the context thread. In this example, we are using an eventQ */
/* This means this callback will be executed during the .run() */
/* call on the eventQ object */
public int onReceive(Object cbArg, LBMMessage msg)
{
switch (msg.type())
{
case LBM.MSG_DATA:
System.out.println("Msg Received: " + msg.dataString());
break;
case LBM.MSG_BOS:
System.out.println("[" + msg.topicName() + "][" + msg.source() + "], Beginning of Transport Session");
break;
case LBM.MSG_EOS:
System.out.println("[" + msg.topicName() + "][" + msg.source() + "], End of Transport Session");
break;
default:
System.out.println("Unknown lbm_msg_t type " + msg.type() + " [" + msg.topicName() + "][" + msg.source() + "]");
break;
}
System.out.flush();
msg.dispose();
return 0;
}
}
|