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From "Mattmann, Chris A (388J)" <chris.a.mattm...@jpl.nasa.gov>
Subject Re: PGE Question
Date Sat, 03 Mar 2012 06:21:44 GMT
Hi Mike,

On Mar 2, 2012, at 12:36 PM, Cayanan, Michael D (388J) wrote:

> Hi,
> In my PGE, I specify my output like the following:
> 	<output>
>            <dir path="[ProductLocation]" createBeforeExe="true">
>               <files regExp="SMAP_L0B_RADAR_SPS.*\.h5" metFileWriterClass="[MetFileWriter]"
args="[ConfigMetoutFile]" />
>               <files name="[PGETask_Name]_RunConfig_[ProductionDateTime].xml" metFileWriterClass="[MetFileWriter]"
args="[RunConfigMetoutFile]" />
> 	   </dir>
> 	</output>
> After ingestion of this output product, I'd like to save the filename in my workflow
metadata. How would I do this?

You could extend CAS-PGE, and override the protected void runIngestCrawler(StdProductCrawler
            List<File> crawlDirs) method like so:

public class SMAPPge extends StdPGETaskInstance{
protected void runIngestCrawler(StdProductCrawler crawler,
            List<File> crawlDirs) {
      super.runIngestCrawler(crawler, crawlDirs);
      for(IngestStatus status: crawler.getIngestStatus()){
           this.pgeMetadata.addDyanmicMetadata("IngestedFiles", status. getProduct().getName());

See this file: http://s.apache.org/ym

> I tried creating a PostIngestSuccess action, but found out that whatever metadata saving
you want to do on the "crawler" side doesn't get passed back to the workflow metadata.

That's by design. Crawler actions are meant to perform functionality "using" a read-only copy
of the workflow met. They are *not* intended to
modify workflow met.

> I suppose I could update the workflow metadata by creating a PostIngestSuccess action
and using the workflow manager client API to do this. However, when I look at this class,
I see the following method,     
> updateMetadataForWorkflow(String workflowInstId, Metadata metadata)
> where it requires the workflow instance ID as a parameter. Is there a way to capture
the workflow instance ID into the workflow metadata so that I can leverage this method to
update my metadata?

You've got the workflow instance id. It's given to you by the workflow manager in the metadata
context for each workflow instance, under the key name:


See here: http://s.apache.org/NNs

and search for "getSharedContext()" for the list of keys that are automatically set.


Chris Mattmann, Ph.D.
Senior Computer Scientist
NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA
Office: 171-266B, Mailstop: 171-246
Email: chris.a.mattmann@nasa.gov
WWW:   http://sunset.usc.edu/~mattmann/
Adjunct Assistant Professor, Computer Science Department
University of Southern California, Los Angeles, CA 90089 USA

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