Service Oriented Java Business Integration · Enterprise Service Bus Integration Solutions for Java Developers by Christudas, Binildas A. -- Read -- Imperial Library of Trantor

Index

Service Oriented Java Business Integration Credits About the Author Acknowledgement About the Reviewers Preface

What This Book Covers What You Need for This Book Who is This Book for Conventions Reader Feedback Customer Support

Downloading the Example Code for the Book Errata Questions

1. Why Enterprise Service Bus

Boundary-Less Organization

Multiple Systems No Canonical Data Format Autonomous, but Federated Intranet versus Internet Trading Partners

Integration

Enterprise Application Integration

Integration Architectures

Point-to-Point Solution Hub-and-Spoke Solution Enterprise Message Bus Integration Enterprise Service Bus Integration

Enterprise Service Bus versus Message Bus

Similarities and Differences Maturity and Industry Adoption

Making the Business Case for ESB

How many Channels Volatile Interfaces New Systems Introducing Data Redundancy Service Reuse System Management and Monitoring

Enterprise Service Bus

Service in ESB Abstraction beyond Interface Service Aggregation Service Enablement Service Consolidation Service Sharing Linked Services Virtualization of Services Services Fabric

Summary

2. Java Business Integration

SOA—The Motto

Why We Need SOA What is SOA SOA and Web Services

WSDL SOAP

Service Oriented Integration (SOI)

JBI in J2EE—How they Relate

Servlets, Portlets, EJB, JCA, and so on JBI and JCA—Competing or Complementing JBI—a New Standard

JBI in Detail

JSR 208 JBI Nomenclature

Provider—Consumer Contract

Detached Message Exchange Provider—Consumer Role Message Exchange Service Invocation

Message Exchange Patterns (MEP)

In-Only MEP Robust In-Only MEP In-Out MEP In-Optional-Out MEP

ESB—Will it Solve all Our Pain Points Summary

3. JBI Container—ServiceMix

ServiceMix—Under the Hood

Salient Features

ServiceMix Architecture

Architecture Diagram Normalized Message Router Flows

Other ESBs

Mule Celtix Iona Artix PEtALS ChainBuilder

Installing ServiceMix

Hardware Requirements OS Requirements Run-time Environment Installing ServiceMix in Windows Installing ServiceMix in Unix Configuring ServiceMix Starting ServiceMix Stopping ServiceMix Resolving classpath Issues

ServiceMix Components—a Synopsis

Standard JBI Components Lightweight JBI Components

Your First JBI Sample—Binding an External HTTP Service

Servlet-based HTTP Service Configure the HTTP Service in ServiceMix Run ServiceMix Basic JBI Container Run a Client against ServiceMix What Just Happened in ServiceMix Spring XML Configuration for ServiceMix

Summary

4. Binding— The Conventional Way

Binding—What it Means

Binding Endpoints

Apache SOAP Binding

A Word about Apache SOAP Apache SOAP Format and Transports RPC and Message Oriented Binding Services

Sample Bind a Stateless EJB Service to Apache SOAP

Sample Scenario Code Listing Running the Sample

Deploying the EJB Bind EJB to SOAP Run the Client

What Just Happened How the Sample Relates to ServiceMix

Summary

5. Some XFire Binding Tools

Binding in XFire

XFire Transports JSR181 and XFire

Web Service Using XFireConfigurableServlet

Sample Scenario Code Listing Running the Sample

Web Service using XFire Spring XFireExporter

Sample Scenario Code Listing Running the Sample

Web Service Using XFire Spring Jsr181 Handler

Sample Scenario Code Listing Running the Sample

XFire Export and Bind EJB

Sample Scenario Code Listing Running the Sample

XFire for Lightweight Integration Summary

6. JBI Packaging and Deployment

Packaging in ServiceMix

Installation Packaging Service Assembly Packaging Service Unit Packaging

Deployment in ServiceMix

Standard and JBI compliant Lightweight

Packaging and Deployment Sample

Phase One—Component Development Phase Two—Component Packaging

Running the Packaging and Deployment Sample Summary

7. Developing JBI Components

Need for Custom JBI Components ServiceMix Component Helper Classes

MessageExchangeListener TransformComponentSupport

Create, Deploy, and Run JBI Component

Code HttpInterceptor Component Configure HttpInterceptor Component Package HttpInterceptor Component Deploy HttpInterceptor Component Build and Run the Sample

Summary

8. Binding EJB in a JBI Container

Component versus Services

Coexisting EJB Components with Services Indiscrimination at Consumer Perspective

Binding EJB Sample

Step One—Define and Deploy the EJB Service Step Two—Bind EJB to ServiceMix Step Three—Deploy and Invoke EJB Binding in ServiceMix Step Four—Access WSDL and Generate Axis-based Stubs to Access EJB Outside Firewall

Reconciling EJB Resources Summary

9. POJO Binding Using JSR181

POJO

What are POJOs Comparing POJO with other Components

ServiceMix servicemix-jsr181

JSR 181 servicemix-jsr181 servicemix-jsr181 Deployment servicemix-jsr181 Endpoint

POJO Binding Sample

Sample Use Case POJO Code Listing XBean-based POJO Binding Deployment Configuration Deploying and Running the Sample Access WSDL and Generate Axis-based Stubs to Access POJO Remotely

Accessing JBI Bus Sample

Sample Use Case for Accessing JBI Bus Sample Code Listing Build, Deploy, and Run the Sample

Summary

10. Bind Web Services in ESB—Web Services Gateway

Web Services

Binding Web Services Why Another Indirection?

HTTP ServiceMix's servicemix-http

servicemix-http in Detail Consumer and Provider Roles servicemix-http XBean Configuration servicemix-http Lightweight Configuration

Web Service Binding Sample

Sample Use Case Deploy the Web Service XBean-based servicemix-http Binding Deploying and Running the Sample Access WSDL and Generate Axis Stubs to Access the Web Service Remotely

Summary

11. Access Web Services Using the JMS Channel

JMS Web Service and JMS

Specifications for Web Service Reliable Messaging SOAP over HTTP versus SOAP over JMS

JMS in ServiceMix

Servicemix-jms Consumer and Provider Roles servicemix-jms XBean Configuration servicemix-jms Lightweight Configuration

Protocol Bridge Web Service in the JMS Channel Binding Sample

ServiceMix Component Architecture for the JMS Web Service Deploy the Web Service XBean-based servicemix-jms Binding XBean-based servicemix-eip Pipeline Bridge XBean-based servicemix-http Provider Destination Deploying the Sample and Starting ServiceMix Test Web Service Using JMS Channel

Summary

12. Java XML Binding using XStream

Java XML Binding

JAXB XStream ServiceMix and XStream

XStream in a Normalized Message Router Sample

Sample Use Case Code HTTPClient Unmarshalling to Transfer Objects HttpInterceptor Component XStreamInspector Component Configure Interceptor and Inspector Components Package Interceptor and Inspector Components Deploy Interceptor and Inspector Components Build and Run the Sample

Summary

13. JBI Proxy

Proxy—A Primer

Proxy Design Pattern JDK Proxy Class Sample JDK Proxy Class

ServiceMix JBI Proxy JBI Proxy Sample Implementing Compatible Interface

Proxy Code Listing XBean-based JBI Proxy Binding Deployment Configuration Deploying and Running the Sample

JBI Proxy Sample implementing In-Compatible interface

Proxy Code Listing XBean-based JBI Proxy Binding Deployment Configuration Deploying and Running the Sample

Invoke External Web Service from the ServiceMix Sample

Web Service Code Listing Axis Generated Client Stubs XBean-based JBI Proxy Binding Deployment Configuration Deploying and Running the Sample Proxy and WSDL Generation

Summary

14. Web Service Versioning

Service Versioning—A Means to SOA

Services are Autonomous Change is the Only Constant Thing All Purpose Interfaces SOA Versioning—Don't Touch the Anti-Pattern Types can Inherit—Why not My Schemas If Not Versions, Then What

Strategy to Version Web Service

Which Level to Version Version Control in a Schema targetNamespace for WSDL Version Parameter

Web Service Versioning Approaches

Covenant Multiple Endpoint Addresses

Web Service Versioning Sample using ESB

Sample Use Case Configure Components in ESB Deploy and Run the Sample

Web Service Versioning Operational Perspective Summary

15. Enterprise Integration Patterns in ESB

Enterprise Integration Patterns

What are EAI Patterns? EAI Patterns Book and Site

ServiceMix EAI Patterns

Why ServiceMix for EAI Patterns? ServiceMix EAI Patterns Configuration

EAI Patterns—Code and Run Samples in ESB

Content-based Router