protected void directSend(
ClientSession clientsession,
String topic,
AbstractMessage.QOSType qos,
ByteBuffer message,
boolean retained,
Integer messageID) {
String clientId = clientsession.clientID;
LOG.debug(
"directSend invoked clientId <{}> on topic <{}> QoS {} retained {} messageID {}",
clientId,
topic,
qos,
retained,
messageID);
PublishMessage pubMessage = new PublishMessage();
pubMessage.setRetainFlag(retained);
pubMessage.setTopicName(topic);
pubMessage.setQos(qos);
pubMessage.setPayload(message);
LOG.info("send publish message to <{}> on topic <{}>", clientId, topic);
if (LOG.isDebugEnabled()) {
LOG.debug("content <{}>", DebugUtils.payload2Str(message));
}
// set the PacketIdentifier only for QoS > 0
if (pubMessage.getQos() != AbstractMessage.QOSType.MOST_ONE) {
pubMessage.setMessageID(messageID);
} else {
if (messageID != null) {
throw new RuntimeException(
"Internal bad error, trying to forwardPublish a QoS 0 message with PacketIdentifier: "
+ messageID);
}
}
if (m_clientIDs == null) {
throw new RuntimeException(
"Internal bad error, found m_clientIDs to null while it should be initialized, somewhere it's overwritten!!");
}
LOG.debug("clientIDs are {}", m_clientIDs);
if (m_clientIDs.get(clientId) == null) {
// TODO while we were publishing to the target client, that client disconnected,
// could happen is not an error HANDLE IT
throw new RuntimeException(
String.format(
"Can't find a ConnectionDescriptor for client <%s> in cache <%s>",
clientId, m_clientIDs));
}
ServerChannel session = m_clientIDs.get(clientId).session;
LOG.debug("Session for clientId {} is {}", clientId, session);
String user = (String) session.getAttribute(NettyChannel.ATTR_KEY_USERNAME);
if (!m_authorizator.canRead(topic, user, clientId)) {
LOG.debug("topic {} doesn't have read credentials", topic);
return;
}
session.write(pubMessage);
}
public void processPublish(ServerChannel session, PublishMessage msg) {
LOG.trace("PUB --PUBLISH--> SRV executePublish invoked with {}", msg);
String clientID = (String) session.getAttribute(NettyChannel.ATTR_KEY_CLIENTID);
final String topic = msg.getTopicName();
// check if the topic can be wrote
String user = (String) session.getAttribute(NettyChannel.ATTR_KEY_USERNAME);
if (!m_authorizator.canWrite(topic, user, clientID)) {
LOG.debug("topic {} doesn't have write credentials", topic);
return;
}
final AbstractMessage.QOSType qos = msg.getQos();
final Integer messageID = msg.getMessageID();
LOG.info("PUBLISH from clientID <{}> on topic <{}> with QoS {}", clientID, topic, qos);
String guid = null;
IMessagesStore.StoredMessage toStoreMsg = asStoredMessage(msg);
toStoreMsg.setClientID(clientID);
if (qos == AbstractMessage.QOSType.MOST_ONE) { // QoS0
route2Subscribers(toStoreMsg);
} else if (qos == AbstractMessage.QOSType.LEAST_ONE) { // QoS1
route2Subscribers(toStoreMsg);
sendPubAck(clientID, messageID);
LOG.debug("replying with PubAck to MSG ID {}", messageID);
} else if (qos == AbstractMessage.QOSType.EXACTLY_ONCE) { // QoS2
guid = m_messagesStore.storePublishForFuture(toStoreMsg);
sendPubRec(clientID, messageID);
// Next the client will send us a pub rel
// NB publish to subscribers for QoS 2 happen upon PUBREL from publisher
}
if (msg.isRetainFlag()) {
if (qos == AbstractMessage.QOSType.MOST_ONE) {
// QoS == 0 && retain => clean old retained
m_messagesStore.cleanRetained(topic);
} else {
if (!msg.getPayload().hasRemaining()) {
m_messagesStore.cleanRetained(topic);
} else {
if (guid == null) {
// before wasn't stored
guid = m_messagesStore.storePublishForFuture(toStoreMsg);
}
m_messagesStore.storeRetained(topic, guid);
}
}
}
m_interceptor.notifyTopicPublished(msg, clientID);
}