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From "Uri Boness (JIRA)" <j...@apache.org>
Subject [jira] Created: (SOLR-1725) Script based UpdateRequestProcessorFactory
Date Mon, 18 Jan 2010 20:34:54 GMT
Script based UpdateRequestProcessorFactory
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                 Key: SOLR-1725
                 URL: https://issues.apache.org/jira/browse/SOLR-1725
             Project: Solr
          Issue Type: New Feature
          Components: update
    Affects Versions: 1.4
            Reporter: Uri Boness


A script based UpdateRequestProcessorFactory (Uses JDK6 script engine support). The main goal
of this plugin is to be able to configure/write update processors without the need to write
and package Java code.

The update request processor factory enables writing update processors in scripts located
in {{solr.solr.home}} directory. The functory accepts one (mandatory) configuration parameter
named {{scripts}} which accepts a comma-separated list of file names. It will look for these
files under the {{conf}} directory in solr home. When multiple scripts are defined, their
execution order is defined by the lexicographical order of the script file name (so {{scriptA.js}}
will be executed before {{scriptB.js}}).

The script language is resolved based on the script file extension (that is, a *.js files
will be treated as a JavaScript script), therefore an extension is mandatory.

Each script file is expected to have one or more methods with the same signature as the methods
in the {{UpdateRequestProcessor}} interface. It is *not* required to define all methods, only
those hat are required by the processing logic.

The following variables are define as global variables for each script:
 * {{req}} - The SolrQueryRequest
 * {{rsp}}- The SolrQueryResponse
 * {{logger}} - A logger that can be used for logging purposes in the script

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