Operating Systems: i5/OS
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Develop Web services deployment descriptor templates for an EJB implementation

 

You can develop deployment descriptor templates for an Enterprise JavaBeans (EJB) implementation that is enabled for JAX-RPC based Web services. You need to create a service endpoint interface and develop a Web Services Description Language (WSDL) file before you can develop the deployment descriptor templates because the service endpoint interface and the WSDL file are artifacts that are used to create the templates.

 

Overview

Completing this task creates deployment descriptor templates that describe how to map the service implementation to a Enterprise JavaBeans (EJB). This task is a required step in developing a Web service from an enterprise bean.

To develop the deployment descriptor templates from a WSDL file, obtain the URL of the WSDL file to use.

If the WSDL file is a local file, the URL looks like this example: file:/path/file_name.wsdl.

You can also specify local files using the absolute or relative file system path.

When the Web service implementation contains an enterprise bean in an EJB module, the webservices.xml, ibm-webservices-bnd.xmi and ibm-webservices-ext.xmi deployment descriptors, and the Java API for XML-based remote procedure call (JAX-RPC) mapping file are generated in the META-INF subdirectory.

Develop deployment descriptor templates with the following step provided in this task section.

 

Procedure

Run the WSDL2Java -verbose -role develop-server -container ejb -genJava no wsdlURL command to generate the server deployment descriptor templates and mapping file into the META-INF subdirectory. If the -verbose option is specified, a list of all generated files displays when the command runs.

 

Results

You have deployment descriptor templates that are required to implement a Web service.

 

Example

The following example uses the AddressBookJ2WE.wsdl WSDL file:

  1. Generate the template files with the following command syntax: 

    WSDL2Java -verbose -role develop-server -container ejb -genJava no AddressBookJ2WE.wsdl
    The deployment descriptor templates are generated into the META-INF subdirectory as follows: 

    Parsing XML file: AddressBookJ2WE.wsdl
Generating: META-INF\webservices.xml
Generating: META-INF\ibm-webservices-bnd.xmi
Generating: META-INF\ibm-webservices-ext.xmi
Generating: META-INF\AddressBookJ2WE_mapping.xml

 

What to do next

Continue to complete the steps that are necessary to develop a Web service from an enterprise bean. The next step is to complete the EJB implementation. When you complete the EJB implementation, you assemble an enterprise bean Java archive (JAR) file that contains the enterprise bean and supporting classes created from a WSDL file.

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Assembling a Web services-enabled enterprise bean JAR file from a WSDL file
Developing Web services applications from existing WSDL files with enterprise beans
Developing Web services applications from enterprise beans

 

Related Reference


WSDL2Java command for JAX-RPC applications