Resource Management

The JMS API resources are a JMS API connection and a JMS API session. In general, it is important to release JMS resources when they are no longer being used. Here are some useful practices to follow.

• If you wish to maintain a JMS API resource only for the life span of a business method, it is a good idea to close the resource in a finally block within the method.

• If you would like to maintain a JMS API resource for the life span of an enterprise bean instance, it is a good idea to use a @PostConstruct callback method to create the resource and to use a @PreDestroy callback method to close the resource. If you use a stateful session bean and you wish to maintain the JMS API resource in a cached state, you must close the resource in a @PrePassivate callback method and set its value to null, and you must create it again in a @PostActivate callback method.