Dismantling SOA Hype: A Real-World Perspective
4
network is to offer Earth Observation and Geographic Information System services to consumers.
This chapter presents an initial strategy of how to architect and design a service-oriented
partner-friendly network using web services and BPEL for orchestration. The focus is on four
important aspects of network design: defining partner relationships, enabling partner provisioning,
offering a central registry of available services, and empowering partners and end users.
Section 2: Building Modern Applications
SOA represents an evolution in the way applications are architected and built. Functions, objects,
and modules were some of the artifacts used to build applications in the 90s. In essence, SOA has
captured many of the old architectures and refined them to provide a new approach in building
applications to meet modern business needs. Modern businesses demand faster response time i.e.
the ability to meet new business requirements as fast as possible in the most economical way.
Modern applications are built with these requirements in mind. Composite Application
Development, Service-Oriented Development of Applications (SODA), and Agile Programming
are different but related paradigms of building such modern applications in an "incremental"
fashion. This second section continues the charter to
inspire architects (this time application
architects) to build modern service-oriented applications.
Chapter 4: A Services-Oriented Approach to Business Rules Development: Organizations have
processes, and processes have rules. Processes need to be automated. Rules need to be defined
intuitively. BPEL automates process and a rules engine automates policies. These rules essentially
drive the processes. IT organizations have so far struggled to delineate business processes from
rules, leading to operational inconsistency and duplication. Policy Studies Inc. provides an
approach to segregate rules from processes, and offers a blueprint to expose rules as services for
building cleaner applications. Using BPEL and a rules engine, PSI has built a shared services
platform to perform Medicare eligibility processing for different states. Kevin Geminiuc, former
Architect at PSI, explains the development strategy to integrate BPEL with a rules engine resulting
in a solution that is more agile and flexible. With this approach, it is possible to change a business
process without touching policies. Policies can be changed graphically without affecting the
business processes.
Chapter 5: Building Rich Internet Applications for Workflow and Process Monitoring: As we
discussed before, processes interact with applications, people, and partners. How can we build an
application that enables business users to interact with processes seamlessly? Applications should
be built to enhance end-user experience. Enterra Solutions marries the world of SOA with the
world of Web 2.0. In this chapter, Doug Todd, CTO of Enterra, presents a strategy to extend
BPEL workflow in a rich user interface and build an application that not only automates
processes, but also ups the ante in terms of aesthetic appeal. It also represents a unique approach to
customize a platform, which is SOA ready.
Chapter 6: Building BPEL Process on the Fly: BPEL provides an opportunity to bring business
and IT together. Business can help define the key processes, and IT provides the necessary
infrastructure to run and automate those processes. Some might argue that BPEL is too technical
to be handed over to analysts for process modeling. CenterStone software, a provider of workplace
management solution, addressed this very concern by building a custom designer geared towards
property managers to define processes for workplace management. CenterStone devised an
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