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From holenoter <holeno...@mac.com>
Subject Re: cas-crawler does not pass preconditions
Date Mon, 06 Jun 2011 20:48:13 GMT
no problem ... appreciate you adding to the documentation!

-brian

On Jun 06, 2011, at 05:10 AM, Thomas Bennett <tbennett@ska.ac.za> wrote:

Hi,

Yes, thanks for the help Brian! Sorry for the late reply.

I finally got around to getting my AutoDetectProductCrawler working. In response, Chris
I hope you don't mind I've given some feedback about my experiences with the crawler on the
wiki page that you created below. I hope thats okay. Please feel free to modify/add/revert
as you wish.

Cheers,
Tom

On 4 June 2011 07:40, Mattmann, Chris A (388J) <chris.a.mattmann@jpl.nasa.gov> wrote:
Brian, I created a wiki page with your guidance below:

https://cwiki.apache.org/confluence/display/OODT/OODT+Crawler+Help

Others can feel free to jump on and contribute.

Cheers,
Chris

On Jun 1, 2011, at 2:20 PM, holenoter wrote:


> hey thomas,
>
> you are using StdProductCrawler which assumes a *.met file already exist for each file
(it has only one precondition which is the existing of the *.met file) . . . if you want a
*.met file generated you will have to use one of the other 2 crawlers.  running: ./crawler_launcher
-psc will give you a list of supported crawlers.  you can then run: ./crawler_launcher -h
-cid <crawler_id> where crawler id is one of the ids from the previous command . . .
unfortunately i don't think the other crawlers are documented all that extensively . . . MetExtractorProductCrawler
will use a single extractor for all files . . . AutoDetectProductCrawler requires a mapping
file to be filled out an mime-types defined
>
> * MetExtractorProductCrawler example configuration can be found in the source:
>  - allows you to specify how the crawler will run your extractor
> https://svn.apache.org/repos/asf/oodt/trunk/metadata/src/main/resources/examples/extern-config.xml
>
> * AutoDetectProductCrawler example configuration can be found in the source:
>  - uses the same metadata extractor specification file (you will have one of these for
each mime-type)
>  - allows you to define your mime-types -- that is, give a mime-type for a given filename
regular expression
> https://svn.apache.org/repos/asf/oodt/trunk/crawler/src/main/resources/examples/mimetypes.xml
>
>    - your file might look something like:
>
> <mime-info>
>
>
>
>       <mime-type type="product/hdf5">
>
>
> <glob pattern="*.h5"/>
>
>
> </mime-type>
>
>
>       </mime-info>
>  - maps your mime-types to extractors
> https://svn.apache.org/repos/asf/oodt/trunk/crawler/src/main/resources/examples/mime-extractor-map.xml
>
> Hope this helps . . .
> -brian
>
> On Jun 01, 2011, at 12:54 PM, Thomas Bennett <tbennett@ska.ac.za> wrote:
>
>> Hi,
>>
>> I've successfully got the CmdLineIngester working with an ExternMetExtractor (written
in python):
>>
>> However, when I try launch the crawler I get a warning telling me the the preconditions
for ingest have not been met. No .met file has been created.
>>
>> Two questions:
>> 1) I'm just wondering if there is any configuration that I'm missing.
>> 2) Where should I start hunting in the code or logs to find out why my met extractor
was not run?
>>
>> Kind regards,
>> Thomas
>>
>> For your reference, here is the command and output.
>>
>> bin$ ./crawler_launcher --crawlerId StdProductCrawler --productPath /usr/local/meerkat/data/staging/products/hdf5
--filemgrUrl http://localhost:9000 --failureDir /tmp --actionIds DeleteDataFile MoveDataFileToFailureDir
Unique --metFileExtension met --clientTransferer org.apache.oodt.cas.filemgr.datatransfer.LocalDataTransferFactory
--metExtractor org.apache.oodt.cas.metadata.extractors.ExternMetExtractor --metExtractorConfig
/usr/local/meerkat/extractors/katextractor/katextractor.config
>> http://localhost:9000
>> StdProductCrawler
>> Jun 1, 2011 9:48:07 PM org.apache.oodt.cas.crawlProductCrawler crawl
>> INFO: Crawling /usr/local/meerkat/data/staging/products/hdf5
>> Jun 1, 2011 9:48:07 PM org.apache.oodt.cascrawl.ProductCrawler handleFile
>> INFO: Handling file /usr/local/meerkat/data/staging/products/hdf5/1263940095.h5
>> Jun 1, 2011 9:48:07 PM org.apache.oodt.cas.crawl.ProductCrawler handleFile
>> WARNING: Failed to pass preconditions for ingest of product: [/usr/local/meerkat/data/staging/products/hdf5/1263940095.h5]
>>



++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++




-- 
Thomas Bennett

SKA South Africa

Office :  +2721 506 7341
Mobile : +2779 523 7105
Email  :  tbennett@ska.ac.za


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