Getting Started with WebSphere Application Server

7
Chapter 7 – Web Services
Web Services are software services that allow for the interaction between different
businesses over the internet. Web services are designed to allow for communication
between machines in a loosely coupled fashion. This can be accomplished by use of a
Web Services Description Language (WSDL) XML document that provides the
description required by the invoker to call the service and to understand the XML
messages returned by the service.
This chapter describes Community Edition's implementation of Web Services, and
showcases IBM Data Studio with DB2 Express-C to easily create Data Web services that
can be deployed in both SOAP and REST style to Community Edition using a "drag and
drop" approach.
In this chapter you will learn about:
• How to develop Web Services in Community Edition
• How to generate stub classes using the tools of Community Edition
• How to consume the Web Services provided by Community Edition
• How to develop Data Web Services using IBM Data Studio and DB2 using drag
and drop
7.1 Community Edition Web Services: The big picture
Figure 7.1 provides an overview of Web Services support in Community Edition.
On the server side where Community Edition is installed, developers can create and deploy
a Web service to Community Edition as shown in (1). Then users can get the Web Service
Description Language (WSDL) of the Web service to generate stubs as shown in (2), which
will be used by the client.
On the left side you can see there are two types of clients invoking the Web Services
deployed in Community Edition:
- A POJO client, as shown in (3), that consumes Web Services from a stand
alone Java application