Chapter 7. Using Web services 179
Figure 7-6 Defining the service and the port for a partner link
The only options that you may specify are which service and which port to use if
there are more than one. This means that all the details about the binding and
the service are in the WSDL file that is provided. In particular, the URL of the
Web service to invoke is hard coded in the WSDL.
To avoid confusion, it is important that during testing the external Web service is
reached from the developer’s workstation in the same manner as it will be called
in the target environment.
Normal production environments have the servers protected by two or more
firewalls. In a business-to-business integration using Web services, the
applications or the processes need to access the Internet over the HTTP
protocol. There are several ways to obtain this objective, and we suggest using
the Web Services Gateway to gain flexibility.
The Web Services Gateway is a product feature implemented in WebSphere
Application Server Version 5 Network Deployment. The primary function of the
Web Services Gateway is to map an existing WSDL-defined Web service to a
new service that is offered by the Gateway to others. The Gateway thus acts as a
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