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sley · Posted: Wed Jul 02, 2003 9:42 am Post subject: When are client channels opened?

Hi.
Is there any documentation by IBM indicating when the client channels are opened? I wrote a stand-alone java application that uses JMS for pub/sub. I lookup the TopicConnectionFactory and receive a connection. The thread sleeps and I was able to check that a client channel was open at that point. When the thread is alive again, it creates a session object and sleeps again. I checked and another client channel was created. After the session, I lookup the Topic object from the bindings file. No channel created. Using the session, we create a topicPublisher object (let's say A) for a specific topic. No channel created there. We keep a handle "A" and create a new topicPublisher using the same session to a different topic. No new channels created. So it seems that a channel is only created for each connection and session.
However, we have a separate application that also uses JMS running on WebLogic 6.1. A stateless session EJB instantiates a new class called publisher and keeps the handle to the class. The publisher does the same thing as the stand-alone app. It creates a connection from the TCF. It uses the connection to create the session and uses the session to create a topicPublisher -- one per unique topic. We cache all the topicPublisher objects. However, when we check how many instances of the channels we have open, the #s don't match. The # of channels open is much greater than the # of ejbs instantiated and creater than the connection objects and session objects. (We also cache the connection and session objects so there's only 1 connection + session per instance of the class). This directly conflicts what we saw for the stand-alone app.
Is there any documentation when the client channel is opened for jms pub/sub?
many thx.
--Sley