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From "Chris A. Mattmann (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (OODT-70) Add ability for sequential and parallel task specifications for Workflows
Date Mon, 04 Jul 2011 16:30:21 GMT

     [ https://issues.apache.org/jira/browse/OODT-70?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chris A. Mattmann updated OODT-70:
----------------------------------

    Attachment: OODT-70.Mattmann.070411.patch.txt

Here's a ton of progress:

* 90% working loading of Wengine-style workflows 
  - remaining items are loading conditions
* rename Wengine-style workflows as "PackagedWorkflows" b/c they contain the whole package
inside a single file

* tons of logging (via System.out) in this patch (will replace with JDK logging)

* tested with the GranuleMaps workflow in wengine branch here: http://svn.apache.org/repos/asf/oodt/branches/wengine-branch/wengine/src/main/resources/policy/workflows/GranuleMaps.xml

Important ideas and items remaining:

* for sub-workflows, can support right now via
  - inline BranchEventTask that sends Event to kick off sub-workflow
  - dynamic events added to event repo

* for parallel, can support right now with event mapped to single-task workflows

The above two things can be automatically wired into the repo and I will take care of this.

> Add ability for sequential and parallel task specifications for Workflows
> -------------------------------------------------------------------------
>
>                 Key: OODT-70
>                 URL: https://issues.apache.org/jira/browse/OODT-70
>             Project: OODT
>          Issue Type: Sub-task
>          Components: workflow manager
>         Environment: indep. of env.
>            Reporter: Chris A. Mattmann
>            Assignee: Chris A. Mattmann
>             Fix For: 0.4
>
>         Attachments: OODT-70.Mattmann.062011.patch.txt, OODT-70.Mattmann.062611.patch.txt,
OODT-70.Mattmann.070411.patch.txt, workflow.policy.mockup.xml
>
>
> There has been a lot of internal JPL work on flushing out new ideas with the workflow
manager. One of those new ideas is to explicitly support differentiating between different
types of {code}org.apache.oodt.cas.workflow.WorkflowTask{code} entities, classifying them
as *sequential* (their current form) versus *parallel* (those that deal explcitly with branch
and bound). Even though the current workflow system can support these activities, they are
largely code-based and require modification and intrinsic knowledge of the Workflow event
system.
> It would be nice to simplify this for the users and allow task.xml, conditions.xml and
*.workflow.xml files (or explicit WorkflowRepos) to support this nomenclature. 
> I'll attach a proposed spec of what the updated XML files would look like using this
paradigm. Then my goal is to take the existing workflow system and augment it with this functionality.

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