1、BPEL: Building Standards-Based Business Processes with Web Services,Nickolas Kavantzas Principal Member, Technical Staff Oracle Application Server 10g, Orchestration Mike Lehmann Principal Product Manager, Oracle Application Server 10g, Orchestration,Session id: 40024,BPEL?,“B E E P L E”? “B E E P E
2、 L L”? “B I P P L E”?,Web Services Meet Business Processes,Web Service 1,Web Service 2,Web Service 3,Web Service 4,Web Service 5,Web Service n,Example Problem Space,Client,PO Service,Credit Service,Inventory Service,Consolidate Results,Business Process Challenges,Coordinate asynchronous communicatio
3、n between services Correlate message exchanges between parties Implement parallel processing of activities . . .,Manipulate/transform data between partner interactions Support for long running business transactions and activities Provide consistent exception handling . . .,Recent History of Business
4、 Process Standards,2000/05,XLang (Microsoft),2001/03,BPML (Intallio et al),2001/05,WSFL (IBM),2001/06,BPSS (ebXML),2002/03,BPEL4WS 1.0 (IBM, Microsoft),BPEL4WS 1.1 (OASIS),2002/06,2003/01,WS-Choreography (W3C),2003/04,WSCI (Sun et al),WSCL (HP),2002/08,Orchestration vs. Choreography,Orchestration Pr
5、ivate process Steps of an executable workflow Process controlled by one party,Choreography Public (abstract) process Sequence of observable messages Conversation made up of equals,Business Process,1. CheckInv,2. Available,3. Place Order,Derivation from Chris Peltz of HP JavaOne 2003 presentation,Bus
6、iness Process Execution Language for Web Services,Version 1.0 released by IBM, Microsoft and BEA in August 2002 Accompanied by WS-Coordination, WS-Transaction which remain unsubmitted to standards bodies Version 1.1 submitted to OASIS April 2003 XML language for describing business processes based o
7、n Web services Convergence of XLANG (Microsoft) and WSFL (IBM) Amazing industry “consensus” in the last 6 months IBM, Microsoft, Oracle, Sun, BEA, SAP, Siebel ,Value Proposition,Portable business processes Built on top of an interoperable infrastructure of Web services Industry wide language for bus
8、iness processes Common skill set and language for developers Choice of process engines Standards lead to competitive offerings,Standards Building Blocks of BPEL,HTTP,IIOP, JMS, SMTP,XML,Encoding,SOAP,WSDL,UDDI,Reliable Messaging,Security,Coordination,Transport,Messaging,Description,Discovery,Quality
9、 of Service,Transactions,BPEL4WS,Processes,BPEL Depends on WSDL and WSDL Extensions,Service Implementation Definition,Service Interface Definition,Service,Port,Binding,Port types define Operations,Message,Type,BPEL Scenario Structure,. . . . . . (activities)* ,BPEL Activities,Primitive Activities,St
10、ructured Activities,Partners,Declare the Web services and roles used by the process Tied to WSDL of the process itself and the participating Web services by service link types,Credit Service,Partner 2,Inventory Service,Partner 3,Partner 1 (the process),Purchase Service,Partners in BPEL,Purchase Proc
11、ess WSDL:,BPEL:,Purchase Process PortType:,Variables,Messages sent and received from partners Persisted for long running interactions Defined in WSDL types and messages,Customer Service,Process,Persist,Persist/ Retrieve,Customer Service,Persist/ Retrieve,Persist/ Retrieve,Variables in BPEL,Purchase
12、Process WSDL:,BPEL:,How is Data Manipulation Done?,Using and , data can be copied and manipulated between variablessupports XPath queries to sub-select data,Simple Activities,Receive Wait for a partner inbound message Can be the instantiator of the business process Reply Synchronous response to a re
13、ceive activity Response to the inbound receive from a partner Invoke Issue a request synchronously *or* asynchronously Pick Specify an inbound set of messages Can be the instantiator of the business process Activity completes when one of the messages arrives,Simple Activities Combined with Structure
14、d Activities,Invoke ,Invoke ,Reply ,Receive ,Sample Activities in BPEL,.,Links Control Flow,Correlation,Customer,SendPurchase ProcessPurchaseResponse,PO Correlation: ,POResponse Correlations:,Seller,AsynchPurchase AsynchPurchaseResponse,initiate=yes,initiate=yes pattern=out,initiate=no pattern=out,i
15、nitiate=yes,initiate=yes,initiate=no,Correlations in BPEL,.,Scopes in BPEL,Provide a shared context for subset of activities Can contain fault handlers event handlers, compensation handler variables correlation sets Can serialize concurrent access to variables, ? . ? . (activities)* ,Long Running Tr
16、ansactions and Compensation,ReserveInventoryCancelReserveInv,InventoryService,CheckCreditChargeHoldFeeCancelHoldFee,CreditService,Compensation Handlers in BPEL,Exception Handling in BPEL, catch exception Based on WSDL port defining faultcan perform activities upon invocation,Just Show Me How to Do i
17、t!,. . .,Compile Package Deploy,Tooling Requirements,IDE build your Web services WSDL authoring model your interfaces Schema authoring model your messages Process modeling model your orchestration Packaging and deployment Debugging Monitoring Analyzing,D E M O N S T R A T I O N,Building a BPEL Scena
18、rio,What Happened to Java?,JSR 207 - Process Definition Language for Java Make business processes natural for Java programmers,Application Server,Servlet,EJB,Based on JSR 207 Session at JavaOne 2003,What Happened to J2EE?,JSR 208 Java Business Integration Make business processes a first class citize
19、n in J2EE containers,Based on JSR 208 Session at JavaOne 2003,. . .,Routing Engine,Transform Engine,BPEL Engine,Normalized Message Bus,JSR 208 Binding SPI,. . .,Binding Framework,JSR 208 Machine SPI,Oracles Strategy,Oracle Application Server Containers for J2EE BPEL runtime Oracle JDeveloper BPEL de
20、sign time Oracle Application Server Integration Web service, B2B and EAI integration,Remember BPEL Does Not Solve “World Hunger”,No data transformation No data translation (EDI, binary formats ) No human workflow No trading partner agreements Silent on existing business protocols (ebXML, RosettaNet
21、) Silent on non Web service interactions (e.g. java to java) . . .,But Remember: People Are Trying to Solve “World Hunger”,W3C: WS-Choreography Spec: WS-Transaction Spec: WS-Coordination Spec: WS-Composite Application Framework OASIS: WS-Reliability Spec: ReliableMessaging Spec: WS-Addressing OASIS:
22、 WS-Security ,Parting Thoughts,Business process portability? Java/J2EE is portable across application servers BPEL is portable independent of Java Programming language in XML? Does this hurt? Vendors, big and small, are busy building modellers Is BPEL in 2003/2004 J2EE in 1998? Much missing but comp
23、elling foundation,Next Steps.,Recommended sessions 36811 - Application Integration using Web Services 40053 - Develop, Deploy, and Manage Web Services with Oracle Application Server 10g Recommended demos and/or hands-on labs DemoGrounds: See the Web Services Booth Hands On: Developing and Deploying
24、Enterprise Web Services with Oracle Application Server 10g See Your Business in Our Software Visit the DEMOgrounds for a customized architectural review, see a customized demo with Solutions Factory, or receive a personalized proposal. Visit the DEMOgrounds for more information. Relevant web sites t
25、o visit for more information http:/ please complete the OracleWorld session survey Session Id : 40024 Thank you.,,Join Over 3,000,000 Developers!,Free Software Downloads,http:/,Free Technical Advice,Develop your career with Oracles experts Web services, Forms Upgrade to the Web, TopLink, Business Intelligence, Integration, J2EE, Linux Connect with your peers Sign up at http:/
