Configuring the scope of a Web service port

When a Web service application is deployed into WebSphere Application Server, an instance is created for each application or module. The instance contains deployment information for the Web module or enterprise bean module, including implementation scope, client bindings and deployment descriptor information. There are three levels of scope that can be set: application, session and request.

Before you begin

New or updated for this feature pack Important: The WebSphere® Application Server Version 6.1 Feature Pack for Web Services extends the capabilities of this product to introduce support for the Java API for XML-Based Web Services (JAX-WS) 2.0 programming model. JAX-WS is the next generation Web services programming model complimenting the foundation provided by the Java API for XML-based RPC (JAX-RPC) programming model. Using the strategic JAX-WS programming model, development of Web services and clients is simplified through support of a standards-based annotations model. Although the JAX-RPC programming model and applications are still supported, take advantage of the easy-to-implement JAX-WS programming model to develop new Web services applications and clients.
Supported configurations New or updated for this feature pack Supported configurations: The Feature Pack for Web Services does not support Java Message Service (JMS) transports or enterprise beans. This product only supports an HTTP transport and hosting JavaBeans endpoints within the Web container for JAX-WS Web services applications. To develop enterprise beans hosted as Web services, you must use the JAX-RPC programming model. This product does allow JAX-WS clients to issue requests from any of the Java Platform, Enterprise Edition (Java EE) containers along with the client Java 2 Standard Edition (J2SE) environment.

Configuring the scope of a Web service port is supported with JAX-RPC applications.

sptcfg
Deploy a Web service into the WebSphere Application Server. Read about deploying Web services applications onto application servers.

About this task

Web Services for Java 2 platform Enterprise Edition (J2EE) specifies that Web services implementations must be stateless. Therefore, to maintain specification compliance, the scope can remain at the application level because the state relevant to the individual sessions level or the requests level is not supposed to be maintained in the implementation. If you want to deviate from the specification and want to access a different JavaBeans instance, because you are looking for information that is located in another JavaBeans implementation, the scope settings need to change.

The setting that you configure for the scope determines how frequently a new instance of a service implementation class is created for the Web service ports in a module. Use this task to configure the scope of a Web service port.

[AIX HP-UX Linux Solaris Windows] [z/OS] You can also configure the scope with the wsadmin tool.

To change the scope setting through the administrative console:

Procedure

  1. Open the administrative console.
  2. Click Applications >Enterprise applications > application_instance > Manage modules > module_instance >Web services implementation scope.
  3. Set the scope to application, session or request. The application scope causes the same instance of the implementation to be used for all requests on the application. The session scope causes the same instance to be used for all requests in each session. The request scope causes a new instance to be used for every request. For example, with the scope set to application, every message that comes to the server accesses the same JavaBeans instance because that is the way the scope settings are configured.
  4. Click Apply.
  5. Click OK.

Results

The scope for a Web service port is configured.

What to do next

Now you can finish any other configurations, start or stop the application, and verify the expected behavior of the Web service.



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Last updatedLast updated: Aug 31, 2013 1:23:07 AM CDT
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