Page Comparison

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• Creating a durable topic subscription is similar to creating a nondurable subscription, but you must additionally provide a name that identifies the durable subscription as shown below.

  Code Block
  language java
  // Create a durable subscriber, supplying a uniquely-identifying name TopicSubscriber sub = session.createDurableSubscriber( topic, "mySub1_0001" );

• The session used to create a durable topic subscriber must have an associated client identifier. The client identifier can be specified by setting the CLIENTID property of the ConnectionFactory object. The client identifier associated with a session is the same as that associated with the connection that is used to create the session as shown below. The name that identifies a durable subscription must be unique only within the client identifier, and therefore the client identifier forms part of the full, unique identifier of the durable subscription. 

  For example, shown below is how the ClientID is set for an amqp session: 

  Shown below is the connection URL used for subscribing to WSO2 MB during an AMQP session. See the topic on setting the connection URL for more information.

  Code Block
  connectionfactory.Connectionfactory = amqp://admin:admin@clientID/carbon?brokerlist='tcp://192.168.10.5:5682'

  Alternatively, an application can specify the client identifier by calling the setClientID() method of the Connection object. For more information about client identifiers and their relationship with durable topic subscribers and durable subscriptions, see Java™ Message Service Specification, Version 1.1. 
• Reusing a durable topic subscription: To reuse a durable subscription that was created previously, the subscriber client must create a durable topic subscriber using a session with the same client identifier as that associated with the durable subscription.  

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