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Subject: Re: [wsbpel] Fault in Compensation
Alex, Satish, Dieter, Danny Thank you for your replies. Now I think I understand it. Yuzo Fujishima NEC Corporation Danny van der Rijn wrote: > Your answers match with my recollection, Alex. > > Alex Yiu wrote: >> >> Hi Yuzo, >> >> This question falls into Issue 226 domain. >> The resolution of Issue 226 needs to be able to answer your question >> clearly. >> (I will forward this email to issue 226 thread later.) >> >> My current interpretation: >> *Q1:* No there will not be the second invocation of CH1. Once the >> compensation handler of a completed scope got faulted, the whole scope >> also considered faulted (maybe we can come up with a more specialized >> term for that). (We need a life cycle diagram of "scope" here in the >> spec) The CH of such a scope should be uninstalled. (Because, if not >> uninstalled, the CH may be in a strange inconsistent state, where the >> CH logic may executed incorrectly, if it got executed twice.) >> *Q2:* Yes, the T1 should be propagated to S2 and handled by F2. >> >> >> Dieter and Satish, if my interpretation is different from yours and >> your collection of the preliminary direction discussed in Redmond F2F, >> please let me know. >> >> >> Thanks! >> >> >> Regards, >> Alex Yiu >> >> >> >> Yuzo Fujishima wrote: >>> Hi, >>> >>> I have yet other questions regarding compensation. >>> Could someone help me answer to them? >>> >>> Suppose we have a process as below: >>> >>> process P1 >>> faultHandler F0 to catch T1 >>> flow >>> scope S1 >>> faultHandler F1 to catch T2 >>> scope S2 >>> faultHandler F2 to catch T1 >>> compensate CA1 >>> sequence >>> while >>> scope S3 >>> compensationHandler CH1 >>> throw T1 >>> throw T2 >>> scope S4 >>> >>> Further suppose that >>> S3 is successfully completed two times, >>> T2 throws a fault, >>> F1 catches the fault, and then >>> CA1 is executed. >>> >>> What is expected to happen next is that CH1 is called twice, >>> once for each successful completion. >>> >>> But what will happen if T1 throws a fault in the first >>> invocation of CH1? >>> >>> Q1: Will there be the second invocation of CH1? >>> >>> Q2: Will the fault be propagated to CA1 then to S2? >>> Or S3, S1 (FH uninstalled), then to P1? >>> In other words, which will catch T1, F2 or F0? >>> >>> Yuzo Fujishima >>> NEC Corporation >>> >>> --------------------------------------------------------------------- >>> To unsubscribe from this mail list, you must leave the OASIS TC that >>> generates this mail. You may a link to this group and all your TCs >>> in OASIS >>> at: >>> https://www.oasis-open.org/apps/org/workgroup/portal/my_workgroups.php >> > --------------------------------------------------------------------- To > unsubscribe from this mail list, you must leave the OASIS TC that > generates this mail. You may a link to this group and all your TCs in > OASIS at: > https://www.oasis-open.org/apps/org/workgroup/portal/my_workgroups.php
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