Resource Manager needs to support flexible JobOutput formats
------------------------------------------------------------
Key: OODT-263
URL: https://issues.apache.org/jira/browse/OODT-263
Project: OODT
Issue Type: New Feature
Components: resource manager
Environment: JPL internal JIRA
Reporter: Chris A. Mattmann
Assignee: Chris A. Mattmann
Fix For: 0.4
One of the things that was never implemented in the resource manager is the
return of a resource manager Job's Output in a flexible format (e.g., different
Job's should be able to return different JobOutputs). This particular feature
is important, say in the case where the WorkflowTasks within a Workflow depend
on their shared Metadata context being updated and still fresh, even though the
WorkflowTask's are now distributed, and not run on a single host anymore.
Prior to the resource manager, since all Workflow's were run on a single host
(in a multi-threaded fashion, but still on a single host), the Metadata context
shared between WorkflowTasks was always updated and kept fresh because all
WorkflowTasks had access to it, because all WorkflowTasks were running in the
same Java Virtual Machine. Now with the WorkflowTask's being distributed, when
a distributed WorkflowTask updates its Metadata context, those changes need to
be propagated back to the Workflow manager so that it can allow other
subsequent WorkflowTasks to use the (possibly) new values within the Metadata.
This patch will define a JobOutput interface, and make an instance of that
interface the return value from the execution of a Resource Manager job.
Another, separate, patch will provide a WorkflowJobOutput class for the
Workflow manager, so that it can obtain the property output from its
WorkflowTasks.
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
