book

The Definitive Guide to SOA: Oracle® Service Bus, SECOND EDITION

by Jeff Davies, David Schorow, Samrat Ray, David Rieber

September 2008

Intermediate to advanced

536 pages

15h 36m

English

Apress

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About the Oracle Service BusWhat's New in OSB 10.3?Who This Book Is ForHow This Book Is StructuredDownloading the CodeContacting the Authors
The Problems We Face TodayEarly ESBsModern SolutionsEnter Oracle Service BusWon't This Lock Me into Oracle Technologies?Why Buy an Enterprise Service Bus?Summary
Installing the SoftwareUsing a Single WorkSpace Studio IDEConfiguring WorkSpace StudioSummary

Service MediationCreating and Deploying a Web ServiceSummary
Message Flow OverviewGoodbye World!Summary
Why Learn About WSDL?WSDL BasicsWSDL Best PracticesVisualizing Documents from SchemasSummary
Scenario 1: User Requests a Product CatalogScenario 2: User Orders a ProductSummary
Synchronous InvocationAsynchronous InvocationParallel Calls with Split-JoinSummary
Service Type and Transport Protocol OverviewSOAP with WSDLSOAP Without WSDLXML with WSDLXML Without WSDLMessaging Service TypesTransport-Typed ServicePOJOsSummary
Web Services Reliable MessagingService ThrottlingService PoolingSOAP with AttachmentsSummary
MonitoringReportingSummary
An Overview of SOA SecurityHow OSB Fits into an SOA Security ArchitectureOSB End-to-End Security ConfigurationPerformance Trade-Offs Using SecuritySummary
Core ConceptsAdvanced ConceptsArchitectural TransformationNot Just an ESB!Summary
Standards, Standards, and More StandardsWhere Do We Begin?The First ProjectThe Second ProjectSummary
What Is a Service?Service OrientationWhat Is Versioning?Do We Version Services or Operations?Constrained by RealityIf Not Versions, Then What?The Service Life CycleThe Future of ITSummary
Factors That Affect OSB PerformanceTuning an OSB InstanceBest Practices for OSB Proxy DesignXQuery and XPath OptimizationsScalability Considerations for an ESBHandling Large Messages with Content StreamingFlow-Control Patterns Using OSBSummary
DeploymentOSB Domains and ClustersSummary
Introduction to Custom TransportsThe Sample Socket TransportBuilding a Custom TransportAdvanced Custom Transport TopicsSummary
SecurityAdministrationMessaging and ProtocolsXML, XQuery, and XSLTMiscellaneousSummary

Content preview from The Definitive Guide to SOA: Oracle® Service Bus, SECOND EDITION

CHAPTER 4Message Flow Basics

Mssaging is at the heart of OSB. Messages are handled by message flows: a set of instructions on what to do with each message. In Chapter 3, you created your first message flow automatically. Although trivial in nature, that message flow shares the same basic set of components that even the most advanced message flows possess.

In this chapter, we will introduce the basic of message flows, and then reuse the HelloWorldBiz business service we created in the previous chapter to demonstrate how message flows work.

Message Flow Overview

A proxy service is defined by its message flow. Each message flow is constructed from one or more nodes. If no nodes are added to a message flow, then OSB simply echoes the request message ...