void timerExpired() {
// should not happen, but if it does,
// fabricate a permanent error and forward up
DatagramRejectedMessage msg =
new DatagramRejectedMessage(message.getDestNodeID(), message.getSourceNodeID(), 0x0100);
System.out.println(
"Never received reply for datagram "
+ (message != null ? message.toString() : " == null"));
handleDatagramRejected(msg, null);
}
/** Handle "Datagram Acknowledged" message */
@Override
public void handleDatagramAcknowledged(DatagramAcknowledgedMessage msg, Connection sender) {
// check if this is from right source & to us
if (!(msg.getDestNodeID() != null
&& msg.getSourceNodeID() != null
&& msg.getDestNodeID().equals(message.getSourceNodeID())
&& message.getDestNodeID().equals(msg.getSourceNodeID()))) {
// not for us, just forward
toUpstream.put(msg, toUpstream);
return;
}
endTimeout();
// forward message upstream
toUpstream.put(msg, toUpstream);
// and allow sending another
new Thread(new Consumer(queue)).start();
}
/** Handle "Datagram Rejected" message */
@Override
public void handleDatagramRejected(DatagramRejectedMessage msg, Connection sender) {
// check if this is from right source & to us
if (!(msg.getDestNodeID() != null
&& msg.getSourceNodeID() != null
&& msg.getDestNodeID().equals(message.getSourceNodeID())
&& message.getDestNodeID().equals(msg.getSourceNodeID()))) {
// not for us, just forward
toUpstream.put(msg, toUpstream);
return;
}
endTimeout();
// check if resend permitted
if (msg.canResend()) {
forwardDownstream();
} else {
// forward upstream to originator and let them sort it out
toUpstream.put(msg, toUpstream);
// and allow sending another
new Thread(new Consumer(queue)).start();
}
}
void endTimeout() {
if (timer != null) timer.cancel();
else
System.out.println(
"Found timer null for datagram " + (message != null ? message.toString() : " == null"));
}