Use the JNDI

This example task shows you how to use WSIF to bind a reference to a Web service, then look up the reference using JNDI.

You access a Web service through information provided in the WSDL document for the service. If you do not know where to find the WSDL document for the service, but you know that it has been registered in a UDDI registry, then you look it up in the registry. Java programs access Java objects and resources in a similar manner, but using a JNDI interface.

The following example shows how, using the Web Services Invocation Framework (WSIF), you can bind a reference to a Web service then look up the reference using JNDI.


Usage Scenario

Specifying the argument values for the Web service

The Web service is represented in WSIF by an instance of the org.apache.wsif.naming.WSIFServiceRef class. This simple Referenceable object has the following constructor

public WSIFServiceRef(
        String WSDL,
        String sNS,
        String sName,
        String ptNS,
        String ptName)

In this example

For example, if the WSDL file for the Web service is available from the Web address http://localhost/WSDL/Example.WSDL and contains the following service and port type definitions

  <definitions targetNamespace="http://hostname/namespace/example"
    <portType name="ExamplePT">
      <operation name="exampleOp">
        <input name="exampleInput" message="tns:ExampleInputMsg"/>
    <service name="abc:ExampleService">

You can specify the following argument values for the WSIFServiceRef class...

Binding the service using JNDI

To bind the service reference in the naming directory using JNDI, you can use the class in WAS

    import org.apache.wsif.naming.*;
    try {
       Context startingContext = new InitialContext();
       WSIFServiceRef ref = new WSIFServiceRef("http://localhost/WSDL/Example.WSDL",
               "myContext/mySubContext/myServiceRef", ref);
    catch  NamingException(e) {
       // Handle  error.

Looking up the service using JNDI

The following code fragment shows the lookup of a service using JNDI

    try {
       InitialContext ic = new InitialContext();
       WSIFService myService = 
           (WSIFService) ic.lookup("myContext/mySubContext/myServiceRef");
    catch  NamingException(e) {
       // Handle error.


See Also

Using complex types
Using WSIF to invoke Web services
Using the WSIF providers
Developing a WSIF service
Interacting with the J2EE container in WAS
Running WSIF as a client