Difference between revisions of "OCR Service"

Revision as of 15:22, 10 June 2011

This is a stateful Web Service that serves as a wrapper to Optical Character Recognition application developed by the INSPIRE team.

Notes to administrator:

In order for the OCR service to work in a scope, a Scientifil Linux 5 execution node with ocropus software installed must exist in that scope. An SL5 node that can execute OCR must: a) be a SL5 node and declare it in $GLOBUS_LOCATION/conf/GHNLabels.xml file with the following xml elements:

       <Variable>
       <Key>other.GlueHostOperatingSystemName</Key>
       <Value>ScientificSL</Value>
       </Variable>
       <Variable>
       <Key>other.GlueHostOperatingSystemRelease</Key>
       <Value>5.0</Value>
       </Variable>
       <Variable>
      

b) have ocropus-0.3.1-i386 directory under $GLOBUS_LOCATION and declare it in $GLOBUS_LOCATION/conf/GHNLabels.xml file with the following xml element:

       <Variable>
       <Key>software.ocropus</Key>
       <Value>true</Value>
       </Variable>
      File:Ocrjob.tar.gz

In addition, it is expected that the following ocrjob.sh script exists under $GLOBUS_LOCATION directory of the node on which OCRService service is running, so that it can be sent to the execution node.

Notes to developer:

When OCR service factory receives a call from a user, it tries to find a Workflow Engine instance in that scope which will use to submit a new job using JDL adaptor. In case of success, it will create a Web Service resource for that job that will contain information of that job such as job name,execution id,workflow engine endpoint etc. A background thread operates periodically and is in charge of collecting all WS-resources, polling the workflow engine for the jobs that are still running and updating the corresponding WS-resources.

Notes to user: