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From "Chris A. Mattmann (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OODT-205) WorkflowInstances should have pre-conditions as well
Date Sun, 14 Aug 2011 05:44:27 GMT

    [ https://issues.apache.org/jira/browse/OODT-205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13084790#comment-13084790
] 

Chris A. Mattmann commented on OODT-205:
----------------------------------------

- made a ton of progress towards this in r1157470. In fact, I've done everything but implement
the engine part of it. To implement this in the current workflow engine, I'm tempted to "fake
it" by firing off the workflow instance, but immediately putting it into paused state by adding
a "virtual first task" with the workflow's conditions attached to it. The task would be a
No-Op, so as soon as the conditions are true, the workflow would enter its "real" first task,
and then be on with it.

> WorkflowInstances should have pre-conditions as well
> ----------------------------------------------------
>
>                 Key: OODT-205
>                 URL: https://issues.apache.org/jira/browse/OODT-205
>             Project: OODT
>          Issue Type: Sub-task
>          Components: workflow manager
>         Environment: From JPL's old internal JIRA, before apache move
>            Reporter: Chris A. Mattmann
>            Assignee: Chris A. Mattmann
>             Fix For: 0.4
>
>
> WorkflowInstances, like WorkflowTasks, are just a specialized data-flow execution sequence.
In many cases, you want a set of global (pre-)conditions to all be true in order to execute
an entire sequence of WorkflowTasks. In this case, it would make a lot of sense to have WorkflowInstance-level
conditions.

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