Book Image

Application Development for IBM WebSphere Process Server 7 and Enterprise Service Bus 7

Book Image

Application Development for IBM WebSphere Process Server 7 and Enterprise Service Bus 7

Overview of this book

By adopting an SOA approach in Business Process Management (BPM), you can make your application flexible, reusable, and adaptable to new developments. The SOA approach also gives you the potential to lower costs (from reuse), and increase revenue (from adaptability and flexibility). However, integrating basic SOA constructs (such as Process, Business Services, and Components) and core building blocks of BPM (such as Process Modeling and Enterprise Service Bus) in a real-world application can be challenging.This book introduces basic concepts of Business Integration, SOA Fundamentals, and SOA Programming Model and implements them in numerous examples. It guides you to building an Order Management application from scratch using the principles of Business Process Management and Service Oriented Architecture and using WebSphere Process Server (WPS) and WebSphere Enterprise Service Bus (WESB). The various detailed aspects, features, and capabilities of the product are conveyed through examplesWe begin with essential concepts on Business Integration, SOA Fundamentals and SOA Programming Model. Then we set up the development environment to build your first Hello Process and Hello Mediation applications.Gradually, we build an SOA-based Order Management Application. We cover important aspects and functions of WPS and WESB with numerous practical examples. We show how to analyze your application's business requirements and check if an SOA approach is appropriate for your project. Then you do a top-down decomposition of your application and identify its use cases, business processes, and services. Having built the SOA Application, we introduce you to various non-functional topics, including: Administration, Governance, Management, Monitoring, and Security. We also discuss deployment topologies for WPS and WESB, performance tuning, and recommended practices.
Table of Contents (20 chapters)
Application Development for IBM WebSphere Process Server 7 and Enterprise Service Bus 7
Credits
About the Authors
About the Reviewers
Preface
WID, WPS, and WESB Tips, Tricks, and Pointers
Index

Building BizServices-CustomerCreditMgmt module


Customer credit Business Service allows JungleSea to manage the risk and would want to check an incoming order against a customer's credit limit. Currently, an application named "Equal" provides information about customers' credit score and exposes the capability on a Java Messaging Service (JMS) interface. The response to the credit risk evaluation will have to be approved by the manager, which we implemented in the order handling business process. By all means, we can move that functionality to this component. But adhering to one of the fundamental tenets of SOA, keeping services stateless, we will leave it as it is.

Tip

The steps to implement a Business Service were discussed in the previous sections. We will not repeat those steps, assuming that you will follow them. As explained earlier, we strongly recommend that you import the PI into your WID workspace and use it as a reference. Also, some of the intricacies that could not be explained...