Example: Registering a WS-Notification publisher
Use this task to write the code for a subscriber client application that can subscribe a consumer application with a broker, 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.
To write the code for a subscriber client application that can subscribe a consumer application with a broker, complete the following steps, referring to the example code extract for further information.
Procedure
Example
The following example code represents a JAX-RPC client acting in the publisher registration role, registering a publisher (producer) application with a broker.
// Look up the JAX-RPC service. The JNDI name is specific to your web services client implementation
InitialContext context = new InitialContext();
javax.xml.rpc.Service service = (javax.xml.rpc.Service) context.lookup(
"java:comp/env/services/NotificationBroker");
// Get a stub for the port on which you want to invoke operations
NotificationBroker stub = (NotificationBroker) service.getPort(NotificationBroker.class);
// Create a reference for the publisher (producer) being registered. This contains the address of the
// producer web service.
EndpointReference publisherEPR =
EndpointReferenceManager.createEndpointReference(new URI("http://myserver.mysom.com:9080/Producer"));
// Create a list (array) of topic expressions to describe the topics to which the producer publishes
// messages. For this example you add one topic
Map prefixMappings = new HashMap();
prefixMappings.put("abc", "uri:mytopicns");
TopicExpression topic =
new TopicExpression(TopicExpression.SIMPLE_TOPIC_EXPRESSION, "abc:xyz", prefixMappings);
TopicExpression[] topics = new TopicExpression[] {topic};
// Indicate that you do not want the publisher to use demand based publishing
Boolean demand = Boolean.FALSE;
// Set a value for the initial termination time of the registration. For example, set a value 1 year in
// the future
Calendar initialTerminationTime = Calendar.getInstance();
initialTerminationTime.add(Calendar.YEAR, 1);
// Create holders to hold the multiple values returned from the broker:
// PublisherRegistrationReference: An endpoint reference for use in lifetime management of
// the registration
EndpointReferenceTypeHolder pubRegMgrEPR = new EndpointReferenceTypeHolder();
// ConsumerReference: An endpoint reference for use in subsequent publishing of messages
EndpointReferenceTypeHolder consEPR = new EndpointReferenceTypeHolder();
// Invoke the RegisterPublisher operation by calling the associated method on the stub
stub.registerPublisher(publisherEPR, topics, demand, initialTerminationTime, null, pubRegMgrEPR, consEPR);
// Retrieve the PublisherRegistrationReference
EndpointReference registrationEPR = pubRegMgrEPR.value;
// Retrieve the ConsumerReference
EndpointReference consumerReferenceEPR = consEPR.value;