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BPEL

BPEL. Business Process Execution Language. BPEL Design goals. XML-based language Interacts through WSDL only Build on Web services standards. Pros & Cons. Pros Easy to implement communication with different web-services Execution as transactional state machine

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BPEL

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  1. BPEL Business Process Execution Language

  2. BPEL Design goals • XML-based language • Interacts through WSDL only • Build on Web services standards

  3. Pros & Cons • Pros • Easy to implement communication with different web-services • Execution as transactional state machine • Means of graphical representation • Cons • XML-based language, not support for all data structures • Hard to create levels of abstraction

  4. What we’ve used • Eclipse Indigo • BPEL Visual Designer 0.5.0 • Apache ODE 1.3.5 • Apache Tomcat 6.0.35

  5. What to try first • How to implement business logic • How to communicate with others • How to debug & test BPEL processes

  6. Business Logic

  7. Business Logic: Lessons • Convenient service invocation • Looks better than coding • (ONLY if you don’t look into XML) • …and for simple processes • Operating only with XML data is difficult • Available operators and functions are too limited

  8. Means of communication

  9. Communication: Lessons learned • RESTful BPEL is not implemented yet

  10. Debugging & Testing • Playing with logging category

  11. Debugging & Testing • ODE Management API (in DEMO) • Implemented as Web-service • http://localhost:8080/ode/processes/ProcessManagement?wsdl • http://localhost:8080/ode/processes/InstanceManagement?wsdl • Difficulties with java interaction • Couldn’t get debugging information

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