Should I unsubscribe a non-durable JMS Topic subscriber?

Question

I'm writing a Java JMS application that is responsible for comunication between cluster nodes. The messaging is done by publish\subscribe using Topic. The TopicSubscriber is created by calling TopicSession.createSubscriber(topic, null, true), meaning that it is not a durable subscriber. Now I'm implementing a "release" method that should unsubscribe the Subscriber (and then close the connection, etc). I saw that TopicSession.unsubscribe(String name) is relevant only for durable subscribers, so how do I unsubscribe a non-durable one? Is it necessary?

Shashi is right. You don't need to unsubscribe anything. It's like turning a radio on and then off. You only get data when a non-durable subscriber is created and when it is closed you don't. — george_h

Shashi Shashi · Accepted Answer · 2012-05-24T04:04:51

No, you don't need to issue TopicSession.unsubscribe() for non-durable subscription. Closing the consumer will remove the subscription from JMS provider. You can also do Session.Close() or Connection.Close() to remove the subscription from JMS provider.

In your Release method just close the subscriber or session or connection.

Unsubscribe is required only for durable subscriptions.

Should I unsubscribe a non-durable JMS Topic subscriber?

1 Answers