About onMessage

885259

Hello,

I would like to know what happen if my application fail (lets suppose the computer break) before the onMessage() return (on a class that implement javax.jms.MessageListener). Suppose the acknowldge used is AUTO_ACKNOWLEDGE. What happen? The JMS Server was acknowledge or not?

Thank you for the attention.

883902

If you are using "AUTO_ACKNOWLEDGE" in a non-transacted session, and application fail before control successfully returns from onMessage() method, JMS server will not be acknowledged.

Go through this article, http://www.javaworld.com/javaworld/jw-02-2002/jw-0315-jms.html?page=1 , to make your understanding a bit more sound.

I hope this helps.

883902

If you are using "AUTO_ACKNOWLEDGE" in a non-transacted session, and application fail before control successfully returns from onMessage() method, JMS server will not be acknowledged.

Go through this article, http://www.javaworld.com/javaworld/jw-02-2002/jw-0315-jms.html?page=1 , to make your understanding a bit more sound.

I hope this helps.

885259

Yeah. Helps a lot. Thank you very much.

Nigel Deakin-Oracle

882256 wrote:
Hello,

I would like to know what happen if my application fail (lets suppose the computer break) before the onMessage() return (on a class that implement javax.jms.MessageListener). Suppose the acknowldge used is AUTO_ACKNOWLEDGE. What happen? The JMS Server was acknowledge or not?

If onMessage() does not return successfully then the message will not be auto-acknowledged.

See the javadoc for Session.AUTO_ACKNOWLEDGE:
http://download.oracle.com/javaee/6/api/javax/jms/Session.html#AUTO_ACKNOWLEDGE
this states that "With this acknowledgment mode, the session automatically acknowledges a client's receipt of a message... when the message listener the session has called to process the message successfully returns. "

Nigel