An Introduction to BPEL standard and its extentions - SoberIT

More documents

Recommendations

Info

Parent processRequest operationTerminateTerminateSub-processFigure 4.3e: Invocation of sub-process with terminationSub process is invoked. Parent process is terminated and termination is passed to sub-process. Finally,termination completion is sent back to parent process.Parent processSub-processRequest operationSubprocessExitedFigure 4.3f: Invocation of sub-process with exit (parent process to sub-process)Sub process is invoked. Parent process encounters an exit activity and exit is passed to sub-process.SubprocessExited is sent to parent process.Parent processRequest operationSub-processExitedFigure 4.3g: Invocation of sub-process with exit (sub-process to parent process)Sub process is invoked and it encounters an exit activity. The exit is passed to parent process. Sub-processexits in turn.4.6 Future actionThe white paper only recognizes the problem of process reused in BPEL, describes different invocationscenarios and coordination mechanisms between parent process and sub/process. However, no consensuson how the problem should be resolved. No other official paper had been released than BPEL-SPE whitepaper. Detailed BPEL-SPE language specification (syntax and semantics) is still under construction
5. EU PROJECT SUPERIt happens quite often that IT staff is needed to solve business problems. The situation is quitetroublesome, which is both resource and time consuming. The needs for better alignment between IT andbusiness are getting stronger.Starting on 1st April 2006 Semantics Utilised for Process Management within and between EnterpRisesproject, also called SUPER project, is an integrated project funded by European Sixth FrameworkProgram. It has 3-year duration. 19 educational and industrial partners take part in the project [17, 18].Overall budget of the project is 16.4 M Euro, of which 11 M Euro is from funding [18].SUPER project intends to raise business process management (BPM) from the IT level to the businesslevel. It will enable business to use information technology more efficiently and to make cooperationbetween IT and business better. To achieve this objective, the project aims at adopting Semantic WebServices technology to make companies more adaptive.In 2006 the BPM domain was framed. In 2007 SUPER focused on the tools of semantic technologies inthe business process domain [19].6. CASE STUDY – EXAMPLE OF THE USE OF BPELBPEL4People and BPEL-SPE are still on their very early stage, no specification has been approved asOASIS standard. Since, their language specifications and structures are based on BPEL, I will take asimple BPELWS example to illustrate how BPEL related application is used in practice [20].6.1 Case scenariosIn the case, a loan procurement application is implemented by a bank called Superloan. An applicantsends a loan request, then the request is handled by Superloan, finally the decision is sent back toapplicant stating whether the loan is permitted or not.6.2 Setting up the systemIn BPEL receive activity, invoke activity and reply activity are used for getting a message, invoking theWeb service and returning results to customer respectively [20, 21]. Since above three actions are takenon after the other, it needs sequence activity to ensure they occur in right order. That will means firstreceive to get the message, then invoke to call Superloan approval process, and finally reply to senddecision to applicant (Figure 6.1).
Page 1 and 2: An Introduction to BPEL standard an
Page 3 and 4: 2. BPEL AND ITS APPLICATION IN BUSI
Page 5 and 6: 3. BPEL4PEOPLE3.1 Limitation of BPE
Page 7 and 8: 3.3.2.3 Managing processIn a long-r
Page 9 and 10: 4.3 Sub-processAs a fragment of BPE
Page 11: Parent processRequest operationResp
Page 15 and 16: Message is stored in containers to
Page 17: Besides excluding people action, BP

An Introduction to BPEL standard and its extentions - SoberIT

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?