Example: Pausing a WS-Notification subscription

Use this task to write the code for a JAX-RPC client acting in the subscriber role, pausing a subscription for a consumer application, based on the example code extract provided.

About this task

This example is based on using the Java™ API for XML-based remote procedure calls (JAX-RPC) APIs with code generated by using the WSDL2Java tool (run against the Notification Broker WSDL generated as a result of creating your WS-Notification service point) and WebSphere® Application Server APIs and SPIs.

In WebSphere Application Server there are two implementations of the WS-Notification service: Version 6.1 and Version 7.0. This JAX-RPC example can interact successfully with Version 6.1 or Version 7.0 WS-Notification service points. However if you want to use WS-Notification with policy sets, for example to enable composition with WS-ReliableMessaging, then your WS-Notification applications must be encoded to use the Java API for XML-based Web Services (JAX-WS) programming model and must interact with Version 7.0 WS-Notification service points. If you are new to programming JAX-WS client applications, see the following topics:

Procedure

  1. Look up the JAX-RPC service.
    The JNDI name is specific to your web services client implementation. The PauseSubscription operation belongs to the SubscriptionManager service.
  2. Get a stub for the port on which you want to invoke operations.
  3. Associate the request with the subscription you want to pause.
    The subscriptionEPR is the EndpointReference returned by the invocation of the Subscribe operation.
  4. Create any optional information.
  5. Invoke the PauseSubscription operation by calling the associated method on the stub.

Example

The following example code describes a JAX-RPC client acting in the subscriber role, pausing a subscription for a consumer application:

// Look up the JAX-RPC service. The JNDI name is specific to your web services client implementation.
// The PauseSubscription operation belongs to the SubscriptionManager service
InitialContext context = new InitialContext();
javax.xml.rpc.Service service = (javax.xml.rpc.Service) context.lookup("java:comp/env/services/SubscriptionManager");

// Get a stub for the port on which you want to invoke operations
SubscriptionManager stub = (SubscriptionManager) service.getPort(SubscriptionManager.class);

// Associate the request with the subscription you want to pause. The subscriptionEPR is the
// EndpointReference returned by the invocation of the Subscribe operation
((Stub) stub)._setProperty(WSAConstants.WSADDRESSING_DESTINATION_EPR, subscriptionEPR);

// Create any optional information
SOAPElement[] optionalInformation =  new SOAPElement[] {};

// Invoke the PauseSubscription operation by calling the associated method on the stub
SOAPElement[] additionalReturnedInformation = stub.pauseSubscription(optionalInformation);