Use the following tasks to display the durable subscriptions that
exist, to enable a subscription to be changed, or to delete a subscription.
About this task
The default messaging provider supports the use of durable subscriptions
to topics. This enables a subscriber to receive a copy of all messages published
to a topic, even messages published during periods of time when the subscriber
is not connected to the server.
If an application creates a durable
subscription, it is added to the list that administrators can display and
act upon by using the administrative console. Each durable subscription is
created with a unique subscription identifier,
clientID##subName
where:
-
clientID
- The client identifier used to associate a connection and its objects with
the messages maintained for applications (as clients of the JMS provider).
You should use a naming convention that helps you identify the applications,
in case you have to relate durable subscriptions to the associated applications
for runtime administration. For more information about client identifiers,
see section 4.3.2 of the JMS 1.1 specification.
-
subName
- The JMS durable subscription name used to uniquely identify a durable
subscription within a given client identifier. For more information about
JMS durable subscription names, see section 6.11.1 of the JMS 1.1 specification.
For durable subscriptions created by message-driven
beans, the subscription name value is set on the JMS activation specification.
For other durable subscriptions, the value is set by the administrator on
the JMS connection factory and by the JMS application on the createDurableSubscriber
operation.
Note:
The
server_name-durableSubscriptions.ser file in the
WAS_HOME/temp directory is used by the messaging service to keep track of durable subscriptions for message-driven beans. If you uninstall an application that contains a message-driven bean, this file is used to unsubscribe the durable subscription. If you have to delete the
WAS_HOME/temp directory or other files in it, ensure that you preserve this file.