private static IMessagesStore.StoredMessage asStoredMessage(PublishMessage msg) {
IMessagesStore.StoredMessage stored =
new IMessagesStore.StoredMessage(
msg.getPayload().array(), msg.getQos(), msg.getTopicName());
stored.setRetained(msg.isRetainFlag());
stored.setMessageID(msg.getMessageID());
return stored;
}
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);
}