2. HelloWorldPublisher
Source code: 
HelloWorldPublisher.java
The HelloWorldPublisher component will
- Create a publisher of the service
- get a reference to the component
- publish the service
- note: component services will take care of distributing the object
In the synchronous connection example, the server side
(HelloWorldProvider)
implemented the interface (HelloWorldServiceSynchronous).
The user (HelloWorldUser)
became a listener of HelloWorldProvider using the HelloWorldSynchronous
class and waited until the call returned before continuing. This
action is sometimes referred as a "pull" action.
With an asynchronous service, the client (HelloWorldSubscriber)
implements the interface (HelloWorldServiceAsynchronous).
The constructor gets a component from the componentFactory and
simply publishes the asynchronous (event or messaging) service
HelloWorldServiceAsynchronous. We don't have to distribute the
object. The call:
ServiceResult result =
component.publishService(HelloWorldServiceAsynchronous.class);
does that for you. In the Connector
section of the Developing Components trail, asynchronous connections
are described as "push" connections - data is pushed
through to the subscriber of this service. In this example, it
is done in the following line of code:
service.helloWorld(++count + " Hello
World!");
Note: HelloWorldPublisher is a simple class that implements Thread.
The use of Thread is not required.
Next: HelloWorldSubscriber
