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From "Brian Foster (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (OODT-484) Enhance Workflow Lifecycle to include state change logic
Date Wed, 15 Aug 2012 02:12:38 GMT

    [ https://issues.apache.org/jira/browse/OODT-484?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13434751#comment-13434751
] 

Brian Foster edited comment on OODT-484 at 8/15/12 1:11 PM:
------------------------------------------------------------

ya... probably change the way default is handle a bit though... all lifecycles will be defined
the same, instead of the current special way default is specified now... with some way of
specifying which lifecycle should be used as default (probably a default attribute or something)
if a lifecycle is not defined for a workflow... also instead of making the lifecyle file be
aware of workflows, the workflows will be aware of lifecylces, that is, you will assign a
workflow a lifecycle in workflows policy XML file instead of a lifecycle being given a workflow
id... this will allow for shareable lifecycle files
                
      was (Author: bfoster):
    ya... probably change the way default is handle a bit though... all lifecycles will be
defined the same, instead of the current special way now... with some way of specifying which
lifecycle should be used as default (probably a default attribute or something) if a lifecycle
is not defined for a workflow... also instead of making the lifecyle file be aware of workflows,
the workflows will be aware of lifecylces, that is, you will assign a workflow a lifecycle
in workflows policy XML file instead of a lifecycle being given a workflow id... this will
allow for shareable lifecycle files
                  
> 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 sub-processor 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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