Service Oriented Architecture SOA: Guiding priciples and ESB demonstration Федор ваханах

What is an architecture?

Tier I Presentation Tier III Data Access Source: Yefim Natis, Gartner 2004 Tier II Business Logic Common 3-Tier Architecture

What is a Service? Is it similar to an object? Is a service a process? Service collaboration (Orchestration vs Choreography) 3-Tier versus N-Tier Communication patterns Communication standards (XML=>WSDL)

Existing business logic is unlocked, exposed as Web services and reusable ERP Legacy Applicati on CRM Increased business insight through central management and control of business processes Harmonized user interface Highly interactive browser based user interface Modeling and execution of business processes Existing applications are leveraged Cordys Process Management Layer Create new functionality to fill the gaps Use of open standards throughout all systems Typical Customer Scenario

Car sales process

WfMC reference model

Process Level Enterprise Application Integration (EAI) NB! -Message que -Publish Subscribe

b=a+ Source: Yefim Natis, Gartner 2004 b=a+ Tier I Presentation =Old Tier V Data Access =Old Tier IV Business Logic =Old Tier II Business Process Management Tier III Integration N-Tier Architecture T2a: process T2b: Business Rules FW

MS-Biztalk functional architecture

Topology of ESB’s State FullBizTalk Pallas Athena State LessFioranoNot possible!

The rearrangement and re-use of software Source: Cordys

Demonstration Tibco BW Steps to do Inside an ESB

Business Travel Process Text Employee asks for a business trip Check flight status (economy, B-class-etc) Ask Airlines for a quotation Receive quotations Compare quotations Send best offer to employee

Business Travel Process

Sequence diagram

Business Travel Process in MS-BizTalk

Inside the ESB Sample processes implemented in TIBCO-BW (an ESB)

Questions?