You can develop a Web Service client by implementing the Web Service client functionality in an existing dynamic Web project that implements the existing Web Service. The following figure shows the flow of Web Service client development using existing Web Services:

Figure 8-6 Flow of Web Service client development using the existing Web Services

An overview of the individual operations is as follows:

1. Acquiring a WSDL file
   Acquire a WSDL file or acquire the URL of a released WSDL file. For details, see 8.4.4(2) Acquiring a WSDL file.
   
2. Generating a Java source
   Generate the Java source for implementing the Web Service client. For details, see 8.4.4(3) Generating a Java Source.
   
3. Implementing a Web Service client
   Use the generated Java source to implement the Web Service client. For details, see 8.4.4(4) Implementing a Web Service client.
   
4. Deploying and debugging J2EE applications
   You deploy and then debug J2EE applications in the J2EE server. For details, see 8.4.4(5) Deploying and debugging J2EE applications.
   

The following subsections describe the development of a Web Service client using the existing Web Services, according to the above.

Acquire the WSDL file that describes the meta information of the Web Services you are trying to invoke, or if the URL of the WSDL file has been released, acquire that URL.

Based on the acquired WSDL file, generate the Java source (service class, SEI, and Java Bean (stub)) required for developing and executing the Web Service client. You can generate the Java source using Eclipse. The procedure of generating the Java source is same as described in the subsection 8.4.1(4) Generating a Java source, however in the Project in Web Service Client dialog boxes, select the dynamic Web project name of the workspace.

When the following operations or settings are performed and the Web Service Client dialog box appears, the Java source folder selection becomes blank and the subsequent operations can no longer be performed. Therefore, specify a folder other than the project root in Java source folder.

• When project root is set up in Source folders on build path in the Source tab of the Java Build Path page in the Properties dialog box of the project used for developing a Web Service client

Use the generated Java source to implement the Web Service client. For the examples of Implementing a Web Service client, see 3.6 Implementing a Web Service client in the manual uCosminexus Application Server Web Service Development Guide.

Deploy and debug the created projects.

(a) Deploying J2EE applications

On the J2EE server, deploy the J2EE applications that are created from the enterprise application project. For details on how to deploy the J2EE applications, see the subsection 6.7 Releasing a project on a J2EE server.

(b) Debugging J2EE applications

Debug the created J2EE applications. For details on how to debug the J2EE applications, see the subsection 6.8 Debugging and executing J2EE applications.