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From "Brian Foster (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OODT-484) Enhance Workflow Lifecycle to include state change logic
Date Mon, 06 Aug 2012 19:05:02 GMT
Brian Foster created OODT-484:
---------------------------------

             Summary: Enhance Workflow Lifecycle to include state change logic
                 Key: OODT-484
                 URL: https://issues.apache.org/jira/browse/OODT-484
             Project: OODT
          Issue Type: Sub-task
          Components: workflow manager
    Affects Versions: 0.4
         Environment: none
            Reporter: Brian Foster
            Assignee: Brian Foster
            Priority: Minor
             Fix For: 0.5


Let's split up the lifecycle XML file into several files (kind have it look like filemgr element
and product-type XML files):
  1) Define States XML file
  2) Define Stages XML file
  3) Mapping of States to Stages XML file
  4) Mapping of States to next valid States

I then propose we add a Priority to each Stage (its purpose will become apparent)... Then
we create a new Interface: StatePreCondition... These preconditions would then be attached
to a State... Then when the Workflow Processor detects a State change it would poll each next
valid State (determined by mapping in purposed XML file #4) for their PreConditions and if
any of the State's PreConditions pass then that State would become the next State of that
Workflow Processor (if multiple States pass as next State, then the priority attached to the
Stage each State belongs to is used to determine which State becomes next State)

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