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  • Book Overview & Buying Application Development for IBM WebSphere Process Server 7 and Enterprise Service Bus 7
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Application Development for IBM WebSphere Process Server 7 and Enterprise Service Bus 7

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

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

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

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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)
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Application Development for IBM WebSphere Process Server 7 and Enterprise Service Bus 7
Credits
About the Authors
About the Reviewers
Preface
1
WID, WPS, and WESB Tips, Tricks, and Pointers
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2
Index

What is the difference between Shared context, Correlation context, and Transient context? When to use which?


 

Definition

When to use?

Shared context

Thread-based memory location shared across all instances of the SMO running within the same thread for the request or response flow.

Used typically in a fan-out/fan-in aggregation to temporarily store service responses.

Correlation context

Used when Mediation primitives want to pass values from the request flow to the response flow.

Used to pass values from the request message onto the response.

Transient context

Used for passing values between Mediation primitives within the current flow—either the request flow or the response flow. The transient context cannot link requests and responses and hence cannot be used across.

Used when you want to save an input message before a service invokes call (within a request or response flow). After the service invoke call, the next primitive can create another message by combining the service invoke response and the original message stored in the transient context.

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