Network Deployment (Distributed operating systems), v8.0 > Develop and deploying applications > Develop web services - Notification (WS-Notification) > Develop applications that use WS-Notification


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.

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 WAS APIs and SPIs.

In WAS there are two implementations of the WS-Notification service: v6.1 and v7.0. This JAX-RPC example can interact successfully with v6.1 or v7.0 WS-Notification service points. However 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 v7.0 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 to invoke operations.
  3. Associate the request with the subscription 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 to invoke operations SubscriptionManager stub = (SubscriptionManager) service.getPort(SubscriptionManager.class);

// Associate the request with the subscription 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);

JAX-RPC
WS-Notification
Use WS-Notification for publish and subscribe messaging for web services
Secure WS-Notification


Related


WSDL2Java command
WS-Notification troubleshooting tips

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