Java Web Services in a Nutshell

JAXM Configuration

You have now seen and deployed all of the code for both the sender and receiver parts of the JAXM message echo example. If, however, you were to start your web browser and point it at http://localhost:8080/SOAPRPSender/request, which is the URL that causes the sender servlet to transmit a message, you would find that after about 30 seconds, the sender would give up waiting for a reply from the receiver and an error page would be displayed by the browser. Although all of the code is in place, the proper JAXM configuration has not been set up to allow the providers to exchange messages. In this section, we look at how to configure the JAXM reference implementation.

Configuring JAXM Clients

A message traveling from the sending servlet to the receiver has to make three hops:

1. From the sender to the local provider

2. From the local provider to the remote provider

3. From the remote provider to the receiving servlet

We saw earlier that a JAXM client logically connects to its local provider using the ProviderConnectionFactory createConnection( ) method, but we didn’t see how the provider itself is located. This information is held in a file called client.xml, which must be located in the CLASSPATH of the JAXM client. Since both the sender and the receiver servlets in this example are deployed as web applications, their client.xml files should be placed in the WEB-INF/classes directory of their WAR files, as shown in the following listing of the files that make up the web archive ...