25.4. Methods
The following methods are defined in the interface javax.jms.Message.
acknowledge
public void acknowledge()
Acknowledges all consumed messages of the session of this consumed message.
All consumed JMS messages support the acknowledge method for use when a client has specified that its JMS session's consumed messages are to be explicitly acknowledged. By invoking acknowledge on a consumed message, a client acknowledges all messages consumed by the session that the message was delivered to.
Calls to acknowledge are ignored for both transacted sessions and sessions specified to use implicit acknowledgement modes.
A client may individually acknowledge each message as it is consumed, or it may choose to acknowledge messages as an application-defined ...
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