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| import com.latencybusters.lbm.*;
public class late_join {
public static void main(String[] args) throws LBMException {
LBMContext ctx = null; /* Context object: container for UM "instance". */
LBMReceiver late_rcv = null; /* Source object: for sending messages. */
LBMSource early_source = null; /* Used for sending messages on a single topic */
LBMRcvReceiver rcvCB = null;
LBMTopic src_topic = null;
ctx = new LBMContext();
{
LBMSourceAttributes srcAttr = null;
srcAttr = new LBMSourceAttributes();
/* Set configuration value using strings */
srcAttr.setValue("late_join", "1");
srcAttr.setValue("retransmit_retention_size_threshold", "1");
src_topic = new LBMTopic(ctx, "test.topic", srcAttr);
early_source = new LBMSource(ctx, src_topic);
early_source.send("test".getBytes(), "test".getBytes().length, LBM.MSG_FLUSH | LBM.SRC_NONBLOCK);
{
LBMTopic topic = null;
topic = ctx.allocTopic("test.topic");
late_rcv = new LBMReceiver(ctx, topic, rcvCB, null, null);
}
}
try {
late_rcv.close();
early_source.close();
ctx.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. This callback is executed on the context */
/* thread. */
public int onReceive(Object cbArg, LBMMessage msg)
{
switch (msg.type())
{
case LBM.MSG_DATA:
if((msg.flags() & LBM.MSG_FLAG_OTR)==LBM.MSG_FLAG_OTR)
System.out.println("Processing Late Join Message. SQN: " + msg.sequenceNumber());
else if((msg.flags() & LBM.MSG_FLAG_RETRANSMIT)==LBM.MSG_FLAG_RETRANSMIT)
System.out.println("Processing OTR Message. SQN: " + msg.sequenceNumber());
else
System.out.println("Processing Normal Message. SQN: " + msg.sequenceNumber());
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;
}
}
|