Re: [wsbpel] Allowing a new process instance to be created by "pick onAlarmuntil"

[Dieter Roller <ROL@de.ibm.com>]

Ugo,

I don't think we should go for this feature. Scheduling the execution of
programs etc. is typically the responsibility of systems management
products. Imbedding scheduling features into BPEL would proliferate the
space as a change for scheduling a business process would now require a
change in BPEL rather than the normal way (in the systems management
tool)...

Cheers,

dieter



                                                                           
             "Ugo Corda"                                                   
             <UCorda@SeeBeyond                                             
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                                                                   Subject 
                                       [wsbpel] Allowing a new process     
                                       instance to be created by "pick     
                                       onAlarm until"                      
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           




Currently the spec does not allow a Pick with createInstance=yes when
alarms are specified. I don't see a good rationale for having this
restriction in the case onAlarm specifies a particular time for the
associated activities to occur ("until" case).

Relaxing this restriction would be useful when we want a process
instance to start at a particular time, possibly on a periodical base.
An alternative way of achieving the same effect would be by defining a
receive from a "partner" representing the deployment environment, and
having the environment itself send a message at the appropriate time.
But I think it would be more clear if we use the pick-onAlarm construct
instead.

Unless somebody shows me that the idea does not make sense, I'll file a
formal issue for it.

Ugo

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