7758chIntroduction.fm Draft Document for Review July 9, 2009 6:31 am
4 WebSphere Application Server V7.0 Web Services Guide
1.1 WebSphere, Web services, and SOA
Businesses face two fundamental concerns: the ability to change quickly and the
need to reduce costs. To remain competitive, businesses must adapt quickly to
internal factors, such as acquisitions and restructuring, or external factors, such
as competitive forces and customer requirements.
IBM WebSphere Application Server V7 is a major release that offers dramatic
runtime improvements, plus simpler and easier ways to develop and deploy SOA
applications. An SOA consists of a set of business-aligned services that
collectively fulfill an organization’s business process goals and objectives. These
services can be choreographed into composite applications and can be invoked
through Internet-based open standards and protocols.
Web services are self-contained, modular applications that you can describe,
publish, locate, and invoke over a network to perform encapsulated business
functions. These functions range from a simple request-reply interaction to full
business process interactions using Internet standards and protocols.
A cost-effective, flexible IT infrastructure is required to support these business
needs. IBM WebSphere, along with SOA and Web services, can address these
needs in a powerful manner.
1.1.1 Service-oriented architecture
Companies want to integrate existing systems to implement IT support for
business processes that cover the entire business value chain. A variety of
patterns are used to make their IT systems available to internal departments or
external customers. However, such interactions are not flexible and do not
provide standardized architecture.
Because of this increasing demand for technologies that support connecting and
sharing resources and data, a need exists for a flexible and standardized
architecture. SOA is a flexible architecture that unifies business processes by
structuring large applications into building blocks, or small modular functional units
or services, for various groups of people to use inside and outside the company.
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