/**
* Flood the subscribers with the message to notify. MessageID is optional and should only used
* for QoS 1 and 2
*/
void route2Subscribers(IMessagesStore.StoredMessage pubMsg) {
final String topic = pubMsg.getTopic();
final AbstractMessage.QOSType publishingQos = pubMsg.getQos();
final ByteBuffer origMessage = pubMsg.getMessage();
LOG.debug(
"route2Subscribers republishing to existing subscribers that matches the topic {}", topic);
if (LOG.isTraceEnabled()) {
LOG.trace("content <{}>", DebugUtils.payload2Str(origMessage));
LOG.trace("subscription tree {}", subscriptions.dumpTree());
}
// if QoS 1 or 2 store the message
String guid = null;
if (publishingQos == QOSType.EXACTLY_ONCE || publishingQos == QOSType.LEAST_ONE) {
guid = m_messagesStore.storePublishForFuture(pubMsg);
}
for (final Subscription sub : subscriptions.matches(topic)) {
AbstractMessage.QOSType qos = publishingQos;
if (qos.byteValue() > sub.getRequestedQos().byteValue()) {
qos = sub.getRequestedQos();
}
ClientSession targetSession = m_sessionsStore.sessionForClient(sub.getClientId());
verifyToActivate(sub.getClientId(), targetSession);
LOG.debug(
"Broker republishing to client <{}> topic <{}> qos <{}>, active {}",
sub.getClientId(),
sub.getTopicFilter(),
qos,
targetSession.isActive());
ByteBuffer message = origMessage.duplicate();
if (qos == AbstractMessage.QOSType.MOST_ONE && targetSession.isActive()) {
// QoS 0
directSend(targetSession, topic, qos, message, false, null);
} else {
// QoS 1 or 2
// if the target subscription is not clean session and is not connected => store it
if (!targetSession.isCleanSession() && !targetSession.isActive()) {
// store the message in targetSession queue to deliver
targetSession.enqueueToDeliver(guid);
} else {
// publish
if (targetSession.isActive()) {
int messageId = targetSession.nextPacketId();
targetSession.inFlightAckWaiting(guid, messageId);
directSend(targetSession, topic, qos, message, false, messageId);
}
}
}
}
}
