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Emerging Technology

Emerging Technology. Business Process Execution Language (BPEL) Team 1 Members Kevin Gravesande, Steve Kim, Rasal Mowla, Al Resptrepo, Carlos Thomas, and Scott Weaver. Introduction. Web services can facilitate seamless business-to-business integration

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Emerging Technology

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  1. Emerging Technology Business Process Execution Language (BPEL) Team 1 Members Kevin Gravesande, Steve Kim, Rasal Mowla, Al Resptrepo, Carlos Thomas, and Scott Weaver

  2. Introduction • Web services can facilitate seamless business-to-business integration • The business process execution language for web services (BPEL) is a standard for business process and integration protocols for web services • The objective of these technologies is to automate process execution across people and systems

  3. Introduction • The BPEL specification was written by Microsoft, IBM, and BEA • BPEL processes consist of web services definition language (WSDL) and BPEL files • BPEL process can define a set of variables and pass those variables as inputs\outputs to web services • Processes can be bound to the input of a inbound activity, output of a synchronous invoke & assigned a value with the assign activity

  4. Use Case ~ Travel Agency [01] [03] [02]

  5. Use Case ~ Financial Institution [06]

  6. Use Case ~ Financial Transaction [04] [05]

  7. Vendors BEA's Weblogic stack BEA's WebLogic Workshop process design editor

  8. Vendors The NetBeans BPEL editor.

  9. How BPEL Works First, a recap of the Loan Scenario Traditional Method A client visits a loan officer at the loan office Loan officer gathers information Loan officer searches for best loan available Contacts client Intermediate Step Offer loan requests online Problem – only gathering of information is automated.

  10. How BPEL Works BPEL automates the whole process Accepts the client request Forms a request to financial institutions Waits for responses Picks the best offer Crafts a reply to the client.

  11. How BPEL WorksThe Building-of Phase • The design, development, and deployment environment • Developers and Business Analysts Tools • Graphic tools (i.e. plug in for Eclipse) • Full blown stand alone environment such as Oracle’s BPEL Process Manager

  12. How BPEL WorksThe Building-of Phase

  13. How BPEL WorksThe Execution-of Phase • Consists of a BPEL Server, contains • the business process definitions • a Web Services framework • the BPEL execution engine • Clients access the system through the Client Services • Other institutions access services through Partner Services

  14. Building a Business Process BPEL uses Web services Definition Language (WSDL) A BPEL process consists of defined steps; each step is called an ”activity.” BPEL supports primitive <invoke>, <receive>, <reply>, <assign>, <throw> as well as structure activities <sequence>, <flow>, <switch>, <while>, <pick> BPEL process also defines defines partner links, using <partnerLink> declares variables, using <variable>

  15. BPEL Specification BPEL4WS is layered on top of several XML specifications: WSDL 1.1, XML Schema 1.0, and XPath1.0. BPEL4WS does the followings: defines a model and a grammar for describing the behavior of a business process defines an interoperable integration model introduces systematic mechanisms for dealing with business exceptions and processing faults.

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