Enterprise service bus part 1
1 like497 views
This document provides an overview of an Enterprise Service Bus (ESB), including: - Defining an ESB as a common integration infrastructure that exploits messaging middleware and intelligent routing. - Describing the evolution from point-to-point integration to ESBs. - Outlining key ESB capabilities like routing, transformation, orchestration, and policy enforcement. - Explaining common ESB components such as the mediator, service registry, and choreographer. - Providing examples of how ESBs are implemented in various platforms and open source technologies.
Enterprise service bus part 1
- 1. Exigen Services confidential Exigen Services confidential Enterprise Service Bus Evgeny Epifantsev december 2009 updated 2012
- 2. Exigen Services confidential Trainer contacts • Evgeny Epifantsev • Developer • eepifantsev@exigenservices.com 2
- 3. Exigen Services confidential Goals • Provide an overview on: • What is Enterprise Service Bus? • How to implement it? 3
- 4. Exigen Services confidential Agenda • Introduction • EAI evolution: P2P->MOM Hub->ESB • ESB purpose and functions overview • QoS and Policy Enforcement • Components: Mediator VFTER (validate, filter, transform, enrich, route), Choreographer • Example of above topics • Open source ESB 4
- 5. Exigen Services confidential Part 1: Overview and ESB Concepts
- 6. Exigen Services confidential Definition 6 ESB is idea of using common integration infrastructure across all enterprise application and systems. An Enterprise Service Bus (ESB) is a new architecture that exploits Web services, messaging middleware, intelligent routing, and transformation. ESBs act as a lightweight, ubiquitous integration backbone through which software services and application components flow."
- 7. Exigen Services confidential What is ESB? 7 What is ESB? Is a Pattern? Is a Product? Is an Architectural Component? Is a Hardware Component?
- 8. Exigen Services confidential Evolution 8 Point-to-Point - Tight coupling - Complexity ~N2 - No visibility - Hard to secure Service Bus (ESB) + Scalable + Service-oriented + Flexible - Harder administration + Standards-based + Cost less than EAI bus Enterprise Application Integration Hub: - Scalability + Easy administration Bus: - Standards and proprietary - High cost
- 9. Exigen Services confidential ESB Architecture context 9 Java/EJB Http Java/EJB HttpService location transparency Sharing service across the enterprise Separate of Business Services from Service implementation
- 10. Exigen Services confidential ESB as a Pattern of SOA 10 WSDL Business service definition PlaceTrade PlaceTrade saveOrTradeOrder() Java implementation service For saveOrTradeOrder()
- 11. Exigen Services confidential ESB capabilities 11 Routing Message transformation Message enhancement Security Transaction management Service orchestration Process choreography Message processing Mapping service Protocol transformation
- 12. Exigen Services confidential ESB basic functions ROUTING messages between services • Addressability, static/deterministic routing • Content-based routing • Policy-based routing • Complex Rule-based routing CONVERTATION •Adapters and protocol conversion •Transport protocols (synchronous and asynchronous) MESSAGING • Message transformation • Message processing • Message enhancement
- 13. Exigen Services confidential BUS: Protocol Conversion 13 ESB Requests Responses Requests Responses Requests Responses Requests Responses Service Requester Service Provider Phone with wap - WXML/HTTPPhone with wap - WXML/HTTP .NET - SOAP/HTTP.NET - SOAP/HTTP C++ - XML/JMSC++ - XML/JMS SAP - BAPISAP - BAPI WebSphere 5.1 - SOAP/JMSWebSphere 5.1 - SOAP/JMS SAP - BAPISAP - BAPI External partner - SOAP/HTTPSExternal partner - SOAP/HTTPS User application - RMIUser application - RMI Database – SQLDatabase – SQL Application - XML/JMSApplication - XML/JMS
- 14. Exigen Services confidential Service mapping 14 The ability to translate a business service into the corresponding service implementation and provide binding and location information Could be implemented through XML, a database, or embedded within the Mediator ESB component Usually contains the following core information • Implementation service name • Service protocol and binding information • Protocol-specific info (i.e. timeouts) • Service-specific routing information
- 15. Exigen Services confidential Process choreography 15 The ability to manage complex business process that require the coordination of multiple business services to fulfill a single business service request Usually BPEL based PlaceFixedIncomeTrade CreateOrder SelectBid PlaceTrade ExecuteTrade Each of business node can be an independent business service
- 16. Exigen Services confidential Service orchestration 16 The ability to manage the coordination of multiple implementation services Can be BPEL based but is usually implemented through inter- service communication or aggregate services Difference between Service orchestration and Process Choreography is based on type of service being coordinated • Process choreography - Business services • Service orchestration - implementation service
- 17. Exigen Services confidential Transaction management 17 The ability to provide a single unit of work for a business service request by providing a framework for the coordination of multiple disparate services ESB should provide a compensatory transactional framework for a service request • WS - Coordination • WS - AT • WS –Business Activity
- 18. Exigen Services confidential Security 18 The ability to protect enterprise services from authorized access Services visible to the entire enterprise through ESB The 4 “A’s” of Security •Authentication • Authorization • Auditing • Administration ESB should provide authentication, authorization and auditing ESB should access a security manager for authentication and authorization rather than have the direct responsibility
- 19. Exigen Services confidential Quality of Service and Policy enforcement 19 • Security WS-Security, SAML • Reliable delivery for each connection • Transaction management WS-AT, WS-Coordination, WS-Business Activity • Traffic management • Policy (WS-Policy) R1R1 P1P1 P2P2 Tx_not supported Tx_not supported Tx_requiredTx_required Tx_requiredTx_required CompensationCompensation CompensationCompensation requestor provider 1 2 3 response No answer
- 21. Exigen Services confidential Common Event Infrastructure 21 Based on Common Base Event (IBM implementation of Web Services Distributed Management ) Common Event Infrastructure (CEI) is IBM's implementation of API, and infrastructure for the creation, transmission, persistence and distribution of a wide range of business, system and network Common Base Event formatted events. CEI Event Submission Interfaces (Event Source) CEI Event Subscription Interfaces (Event Server) CEI Event Query Interfaces (Event Server)
- 22. Exigen Services confidential CEI Event types
- 23. Exigen Services confidential Common Event Browser
- 24. Exigen Services confidential ESB Components
- 25. Exigen Services confidential ESB components 25 ESB can broken down into the following components • Mediator • Service registry • Choreographer • Rules Engine MediatorMediator Service registry Service registry ChoreographerChoreographer Rules engineRules engine
- 26. Exigen Services confidential Mediator (Routing, Message transformation) 26 Mediator Requests Responses Requests Responses Requests Responses Requests Responses Service Requester Service ProviderValidation XSD Validation XSD Transform XSLT Transform XSLT Enrich XPath Enrich XPath OperateOperateRoute UDDI Route UDDI VETRO export import
- 27. Exigen Services confidential Process choreographer 27 BPEL – Business Process Execution language partnerLink purchasing partnerLink purchasing purchaseOrderPTpurchaseOrderPT partnerLink invoicing partnerLink invoicing ComputePricePTComputePricePT invoiceCallbackPTinvoiceCallbackPT <wsdl:portType name="purchaseOrderPT"> <wsdl:operation … </wsdl:operation> </wsdl:portType> <plnk:partnerLinkType name="purchasingLT"> </plnk:partnerLinkType> <plnk:partnerLinkType name="invoicingLT"> <plnk:role portType="pos:computePricePT" /> <plnk:role portType="pos:invoiceCallbackPT“ /> </plnk:partnerLinkType>
- 28. Exigen Services confidential BPEL Process 28 <sequence> <receive portType="lns:purchaseOrderPT" … /> <flow> <invoke portType="lns:computePricePT“ … /> <receive portType="lns:invoiceCallbackPT" …/> </flow> <reply portType="lns:purchaseOrderPT” … /> <sequence> <sequence> <receive portType="lns:purchaseOrderPT" … /> <flow> <invoke portType="lns:computePricePT“ … /> <receive portType="lns:invoiceCallbackPT" …/> </flow> <reply portType="lns:purchaseOrderPT” … /> <sequence>
- 29. Exigen Services confidential Implementation Mediation Module 29 Mediation flow Mediation module Requests Responses Requests Responses Requests Responses Requests Responses Service Requester Service Provider Exports Imports Mediation flow component ExportsImports
- 30. Exigen Services confidential Implementation mediation Flow 30 InterfacesInterfaces Mediation primitivesMediation primitives
- 31. Exigen Services confidential Implementation in Business Works 31
- 32. Exigen Services confidential Implementation steps 32 Import WSDL(SCA, Web Service, HTML, JMS) Import WSDL(SCA, Web Service, HTML, JMS) Create mediatorCreate mediator Connect WSDL ports with mediator (import) Connect WSDL ports with mediator (import) Generate exports with binging (SCA, Web Service, HTML, JMS) Generate exports with binging (SCA, Web Service, HTML, JMS) Messaging ResourcesWebSphere ESB Create bus instanceCreate bus instance Setup SDO repositorySetup SDO repository Setup resource adaptersSetup resource adapters Create client listeners for every protocols Create client listeners for every protocols Create interceptorsCreate interceptors Create mediator (EJB)Create mediator (EJB)
- 33. Exigen Services confidential ESB platforms 33 Sun GlassFish ESB NetBeans IDE, BPEL orchestration, WS JAX-WS, Business Rules, Transaction, BAM Matrix BusinessWorks no transaction, no dusiness rules, BAM Mule ESB EE custom implementation model, WS CXF, No BAM, no Business rules IONA Fuse ESB Apache ServiceMix, JBI, OSGI, WS CXF, no BAM, Business rules WSO2 ESB Apache Synapse, WS Apache Axis2 WebSphere ESB WebSphere MQ, JMS, BPEL, SCA WS JAX-WS, BAM, Business Rules Oracle ESB JMS, BPEL
- 34. Exigen Services confidential Open source way 34 ESB Business Rules Business Rules DroolsDrools RoutingRouting eipeip javajava camelcamel ChoreographyChoreographyjBPMjBPM Transform ation Transform ation xpathxpath xsltxslt simplesimple EventsEventsIBMIBM OracleOracle JMSJMS AMQAMQ
- 35. Exigen Services confidential Thank You! Questions? 35
Editor's Notes
- #7: Основа архитектуры ESB — это идея использования общей интеграционной инфраструктуры всеми корпоративными приложениями на базе обмена сообщениями. Все приложения взаимодействуют через одну точку, которая, в случае необходимости, обеспечивает сохранность обращений, преобразование данных и транзакции. При этом целью интеграции приложения является создание единственного модуля (или адаптера), который отвечает за «подключение» приложения к ESB. Последующую обработку сообщений и их маршрутизацию в другие системы, ESB выполняет на основании установленных бизнес-правил самостоятельно
- #8: Ответ ДА на все четыре вопроса.