/**
* Remove the clientID from topic subscription, if not previously subscribed, doesn't reply any
* error
*/
public void processUnsubscribe(ServerChannel session, UnsubscribeMessage msg) {
List<String> topics = msg.topicFilters();
int messageID = msg.getMessageID();
String clientID = (String) session.getAttribute(NettyChannel.ATTR_KEY_CLIENTID);
LOG.debug("UNSUBSCRIBE subscription on topics {} for clientID <{}>", topics, clientID);
ClientSession clientSession = m_sessionsStore.sessionForClient(clientID);
verifyToActivate(clientID, clientSession);
for (String topic : topics) {
boolean validTopic = SubscriptionsStore.validate(topic);
if (!validTopic) {
// close the connection, not valid topicFilter is a protocol violation
session.close(true);
LOG.warn(
"UNSUBSCRIBE found an invalid topic filter <{}> for clientID <{}>", topic, clientID);
return;
}
subscriptions.removeSubscription(topic, clientID);
clientSession.unsubscribeFrom(topic);
m_interceptor.notifyTopicUnsubscribed(topic, clientID);
}
// ack the client
UnsubAckMessage ackMessage = new UnsubAckMessage();
ackMessage.setMessageID(messageID);
LOG.info("replying with UnsubAck to MSG ID {}", messageID);
session.write(ackMessage);
}
