private void frame() {
FrameType type = frame.getFrameType();
if (type == null) {
// ReceivedUnwantedFrame
if (LOG.isDebugEnabled()) LOG.debug(thisStation + " idle:Unknown frame type");
} else if (frame.broadcast()
&& type.oneOf(FrameType.token, FrameType.bacnetDataExpectingReply, FrameType.testRequest)) {
// ReceivedUnwantedFrame
if (LOG.isDebugEnabled())
LOG.debug(thisStation + " Frame type should not be broadcast: " + type);
} else if (frame.forStation(thisStation) && type == FrameType.token) {
// ReceivedToken
// debug("idle:ReceivedToken from " + frame.getSourceAddress());
if (LOG.isDebugEnabled()) LOG.debug(thisStation + " idle:ReceivedToken");
frameCount = 0;
soleMaster = false;
state = MasterNodeState.useToken;
//
// long now = timeSource.currentTimeMillis();
// if (lastTokenPossession > 0)
// debug("Since last token possession: " + (now - lastTokenPossession) + "
// ms");
// else
// debug("Received first token possession");
// lastTokenPossession = now;
} else if (frame.forStation(thisStation) && type == FrameType.pollForMaster) {
// ReceivedPFM
// debug("idle:ReceivedPFM from " + frame.getSourceAddress());
if (LOG.isDebugEnabled()) LOG.debug(thisStation + " idle:ReceivedPFM");
sendFrame(FrameType.replyToPollForMaster, frame.getSourceAddress());
} else if (frame.forStationOrBroadcast(thisStation)
&& type.oneOf(FrameType.bacnetDataNotExpectingReply, FrameType.testResponse)) {
// ReceivedDataNoReply
// debug("idle:ReceivedDataNoReply");
if (LOG.isDebugEnabled()) LOG.debug(thisStation + " idle:ReceivedDataNoReply");
receivedDataNoReply(frame);
} else if (frame.forStation(thisStation)
&& type.oneOf(FrameType.bacnetDataExpectingReply, FrameType.testRequest)) {
// ReceivedDataNeedingReply
// debug("idle:ReceivedDataNeedingReply");
if (LOG.isDebugEnabled()) LOG.debug(thisStation + " idle:ReceivedDataNeedingReply");
receivedDataNeedingReply(frame);
state = MasterNodeState.answerDataRequest;
replyDeadline = lastNonSilence + Constants.REPLY_DELAY;
}
}
private void waitForReply() {
if (silence() > Constants.REPLY_TIMEOUT) {
// ReplyTimeout - assume that the request has failed
// debug("waitForReply:ReplyTimeout");
if (LOG.isDebugEnabled()) LOG.debug(thisStation + " waitForReply:ReplyTimeout");
frameCount = maxInfoFrames;
state = MasterNodeState.doneWithToken;
} else if (receivedInvalidFrame != null) {
// InvalidFrame
// debug("waitForReply:InvalidFrame: '" + receivedInvalidFrame + "', frame=" +
// frame);
if (LOG.isDebugEnabled()) LOG.debug("Received invalid frame: " + receivedInvalidFrame);
receivedInvalidFrame = null;
state = MasterNodeState.doneWithToken;
activity = true;
} else if (receivedValidFrame) {
activity = true;
FrameType type = frame.getFrameType();
if (frame.forStation(thisStation)) {
if (type.oneOf(FrameType.testResponse, FrameType.bacnetDataNotExpectingReply)) {
// ReceivedReply
// debug("waitForReply:ReceivedReply from " + frame.getSourceAddress());
if (LOG.isDebugEnabled()) LOG.debug(thisStation + " waitForReply:ReceivedReply");
receivedDataNoReply(frame);
} else if (type.oneOf(FrameType.replyPostponed)) {
// ReceivedPostpone
// debug("waitForReply:ReceivedPostpone from " + frame.getSourceAddress());
if (LOG.isDebugEnabled()) LOG.debug(thisStation + " waitForReply:ReceivedPostpone");
; // the reply to the message has been postponed until a later time.
}
state = MasterNodeState.doneWithToken;
} else if (!type.oneOf(FrameType.testResponse, FrameType.bacnetDataNotExpectingReply)) {
// ReceivedUnexpectedFrame
// debug("waitForReply:ReceivedUnexpectedFrame: " + frame);
if (LOG.isDebugEnabled()) LOG.debug(thisStation + " waitForReply:ReceivedUnexpectedFrame");
// This may indicate the presence of multiple tokens.
state = MasterNodeState.idle;
}
receivedValidFrame = false;
}
}
public void queueFrame(FrameType type, byte destination, byte[] data) {
if (!type.oneOf(
FrameType.bacnetDataExpectingReply,
FrameType.bacnetDataNotExpectingReply,
FrameType.testRequest)) throw new RuntimeException("Cannot send frame of type: " + type);
Frame frame = new Frame(type, destination, thisStation, data);
synchronized (framesToSend) {
framesToSend.add(frame);
}
}
