Designing the Service Oriented Architecture

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Introduction

This one-day seminar teaches the crucial guidelines for designing a Service Oriented Architecture. It is based on experiences gained at several SOA projects. Several issues need to be addressed when designing SOAs. Products need to be selected and a global architecture must be designed. How will existing applications, that at first were not meant to be integrated, be linked to the SOA? What does a document oriented interface for services mean? Management of SOA should also be organised carefully. Should Business Activity Monitoring be considered or not? How should billing, service level agreements and security be dealt with? These, and many more questions need to be answered before SOA can be designed and built.

Subjects

Introduction: From web services to service oriented architectures
  • The business advantages of SOA
  • From monoliths via integrated systems to decomposable information systems
  • Why is XML ideal for exchanging data?
  • Overview of the standards for web services, including SOAP, WSDL, UDDI, WS-Reliability, WSDM, WS-Security and BPEL
  • The switch from classic EAI to ESB
  • The development of SOA with an ESB
  • Alternatives for an ESB; application server, hub-and-spoke integration broker and message oriented middleware
  • Overview of the market of ESB's, including CapeClear, Cordys, Fiorano, IBM, InterSystems, SeeBeyond, Sonic and SpiritSoft
  • Adapters from Actional, DataDirect and iWay
Designing service interfaces and transformations
  • Design rules for the interfaces of individual services
  • A modelling technique developed by Gregor Hohpe and David Chappell to design SOA's
  • From parameter to document oriented interfaces
  • Aggregating small, data oriented services
  • In which language should aggregations be written: Java, C#, XSL or BPEL?
  • The influence of interfaces on network traffic
  • XSL and XQuery as languages to transform XML documents
Orchestration of services with BPEL
  • Introduction to BPEL - the standardised language for orchestration
  • Overview of BPEL engines that are commercially available, including the ones from CapeClear, Fiorano, IBM, Microsoft, OpenStorm, Oracle, PolarLake and SeeBeyond
  • Combining data from different systems: with BPEL or in a service?
  • Should BPEL or the service access the database?
  • Enriching of data by means of lookup tables
  • The role of cleaning tools when matching data
  • The difference between orchestration and choreography
  • A new standard for choreography - WS-CDL
  • The data warehouse and the operational data store (ODS) as data source for services
Content based routing
  • What exactly is the job of a content based router?
  • Examples of content based routers
  • Disconnecting of services through routing
  • How to handle message changes through routing
Transactions in SOA
  • Existing standards for transaction management, such as XA and DTP, are failing
  • New standards for web service transactions: BTP, WS-Transaction and WS-CAFS
  • What is a compensating transaction?
  • Overview of stand-alone Business Transaction Manager's from Arjuna, Atomikos and Choreology
General guidelines for SOA with regard to design
  • Guidelines for designing a loosely coupled architecture
  • Which conditions should legacy applications meet in order to be included in SOA?
  • Batch applications and SOA's
  • Including the business process in the documents
  • Matching comparable data
The business rule engine
  • What is a business rule engine?
  • Where should business rules be implemented?
  • Possibilities of BizTalk
Summary and conclusions
  • The future of the service oriented architecture
  • The relationship between SOA and other IT topics
  • General recommendations for the introduction of a SOA
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