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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
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Application Development for IBM WebSphere Process Server 7 and Enterprise Service Bus 7
Credits
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Credits
About the Authors
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About the Authors
About the Reviewers
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About the Reviewers
Preface
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Preface
Lock Free Chapter
1
Introducing IBM BPM and ESB
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Introducing IBM BPM and ESB
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What is Service Oriented Architecture (SOA)?
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Achieving success through BPM enabled by SOA
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IBM SOA Reference Architecture
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Introducing IBM WebSphere Process Server (WPS)
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Introducing IBM WebSphere Enterprise Service Bus (WESB)
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IBM's SOA Foundation lifecycle
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IBM's BPM enabled by SOA method
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Summary
2
Installing the Development Environment
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Installing the Development Environment
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WebSphere Integration Developer overview
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Prerequisite configuration
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Installing WID on Windows
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Getting Started with WID
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Words of wisdom — tips, tricks, suggestions, and pitfalls
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Summary
3
Building your Hello Process Project
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Building your Hello Process Project
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SOA programming model
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Building your first business process
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Testing modules and components
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Words of wisdom — tips, tricks, suggestions, and pitfalls
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Summary
4
Building Your Hello Mediation Project
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Building Your Hello Mediation Project
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WS standards
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Creating mediation modules
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Creating the Hello Mediation Flow
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Testing modules and components
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Summary
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Business Process Choreography Fundamentals
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Business Process Choreography Fundamentals
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Using WPS in the right scenarios
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Creating service contracts with interface editor
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Lingua Franca for BPM — Business Objects
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Working with Business Process (WS-BPEL)
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Using rule groups and rules
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Words of wisdom — tips, tricks, suggestions, and pitfalls
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Summary
6
Mediations Fundamentals
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Mediations Fundamentals
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Mediation flows
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Service Message Object (SMO)
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Working with Mediation primitives
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Dynamic routing
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Integration with external systems using adapters
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Summary
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Sales Fulfillment Application for JungleSea Inc.
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Sales Fulfillment Application for JungleSea Inc.
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Business requirements
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Existing JungleSea Inc. applications
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SOA considerations
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Architecture and design
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Architectural decisions and design patterns applied
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Laying out the build plan
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Summary
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Walk the Talk
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Walk the Talk
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Shared libraries
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End Application libraries
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Visualizing the solution
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Process Services
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Business Services and Access Services
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Summary
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Building the Order Handling Processes
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Building the Order Handling Processes
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Module assembly
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Steps involved in building business process
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Building ProcessServices-CustomerInterfaceManagement
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Building ProcessServices-OrderHandling
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Correlation sets in BPEL processes
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Summary
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Integration with Various Applications
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Integration with Various Applications
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Patterns addressed
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Module assembly
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Testing the modules
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Implementing Business Service and Access Service modules
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Building BizServices-ShippingMgmt module
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Building BizServices-CustomerCreditMgmt module
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Building BizServices-SupplierPartnerMgmt module
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Building BizServices-InventoryMgmt module
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Building BizServices-CustomerBillingMgmt module
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Building BizServices-CustomerInfoMgmt module
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Summary
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Business Space
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Business Space
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What is Business Space?
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Business Spaces
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Widgets
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Summary
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Deployment Topologies
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Deployment Topologies
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Deployment topology considerations
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WebSphere Application Server Network Deployment fundamentals
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Operational architecture
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Sales Fulfillment Application deployment topology
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Words of Wisdom
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Summary
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Management, Monitoring, and Security
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Management, Monitoring, and Security
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Solution administration tasks
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Monitoring WPS/WESB applications
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Words of wisdom — tips, tricks, suggestions, and pitfalls
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Summary
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WID, WPS, and WESB Tips, Tricks, and Pointers
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WID, WPS, and WESB Tips, Tricks, and Pointers
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Any suggested method to backup WID?
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Increasing WID's heap size
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How to add projects and libraries as dependencies in WID?
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How to reset a profile within WID?
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How to change the level of Web Services Interoperability (WS-I) compliance?
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How to change the type of your business process?
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How to get the list of ports the server uses for connections?
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Various tools and associated URLs that we should be aware of and bookmark
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Checking the version of the WPS or WESB server
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How to list all defined profiles on a WPS server?
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What is the difference between backing up admin configuration and profile backup?
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The administrator user ID and password to log in to the administrative console
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The recommended WPS deployment topology
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Turning off IBM-specific BPEL Extension
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Deploying modules with libraries by reference
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How to create versioned modules and libraries?
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Recommended practices when working in a team environment or when performing team programming
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Stopping and starting process templates with the admin console
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tranLog
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Enabling and disabling Cross-Component Trace settings
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Use of global variables in a forEach within a BPEL process
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Enabling event monitoring in WID
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Using DynaCache to improve the performance of your WPS or WESB solution?
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What is the difference between Shared context, Correlation context, and Transient context? When to use which?
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What is WID history logging?
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BPEL or Mediation Flows — which and when to choose?
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Some common business process implementation types and when to use them
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Seeing WPS data in a Derby DB
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Miscellaneous Snippet Topics
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Overriding a Web Service endpoint in a mediation flow
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What is deferred parsing in the context of WESB?
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Some performance tips and considerations
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The difference between testing a module and testing a component
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What are the best forums to get help in WID, WPS, and WESB?
2
Index
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Index

What is Service Oriented Architecture (SOA)?

There is no single unique and easy way to define or explain SOA. Given a room full of C-level executives, IT Managers, IT-Architects, and developers with each asked to give a one sentence explanation of what SOA is, for sure, each answer will be different. What is the fundamental message behind SOA? What is it trying to achieve and what does it provides the adopter with? This will help the reader to be able to define or explain it correctly. Let's list some of most common facts he/she may have heard about SOA:

  • It's a style for building loosely coupled and distributed applications

  • It's all about service providers providing services to service consumers that conform to contracts

  • It provides a programming model based on standards defined by various standard bodies including OASIS, WS-*, and so on

Note

Service Oriented Architecture (SOA) is a set of architectural styles, patterns, principles, procedures, and criteria for building solutions and applications.

Such applications exhibit the following characteristics:

  • Loosely coupled from operating systems, programming languages, and protocols

  • Expose coarse grained Business Services that can be mapped to business capabilities

  • Business Services are Modular, Encapsulated, and Reusable

  • Can be Composed, Orchestrated, or Choreographed

  • Services expose standardized interfaces

  • Services are described though contracts and hence discoverable

  • Leverages a standards-compliant middleware

The process of adopting an SOA is a journey and possibly an ever-evolving, ever-learning, never ending one. With SOA, you progress and mature over time to reach a state where you can truly achieve the benefits, as promised.

Process, Business Services, and Components—the core constructs

Business Processes represent the flow of activities required to complete a business process, which, in turn, help achieve a business objective. They are orchestrations, choreography, or compositions of Business Services targeted to achieve business goals.

Business Service, to be more precise, represents a discrete business function that makes meaningful sense to an organization. A Business Service can be composed of one of the many fine-grained functions or atomic services, and by the true definition of SOA, encapsulation, it can dynamically behave depending on how it is invoked. Services form the building blocks of SOA and should be reusable, decoupled, exposed in a standardized fashion, and derived from disparate IT resources.

Components realize and provide services from one or more applications and these components are wrapped into the Business Services. Components help realize not only the functionality of the services they expose, but also ensure that their Quality of Service (QoS) is good, as guaranteed by the service provider. The following figure depicts how all of the above are interrelated and interconnected at a very high level.

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