TDS DQC Service

DEPRECATED

The TDS DQC service has been DEPRECATED. Instead use the TDS datasetScan proxy dataset capability (using the addProxies element).

Configuration

The TDS DQC service must be enabled in the threddsConfig.xml configuration file before it can be used. This is done by adding the following:

  <DqcService>
    <allow>true</allow>
  </DqcService>

Configuration files for the DQC service are located in ${TOMCAT_HOME}/content/thredds/dqcServlet/config/. The config.xml configuration file describes a set of thredds.dqc.server.DqcServletConfigItems (the format of config.xml is a Java Preferences format). Here's an example:

<?xml version='1.0' encoding='UTF-8'?>
<preferences EXTERNAL_XML_VERSION='1.0'>
  <root type='user'>
    <map>
      <beanCollection key='config' class='thredds.dqc.server.DqcServletConfigItem'>

        <bean name='latestModel'
          description='Provide Access to Latest Model Runs.'
          handlerClassName='thredds.dqc.server.latest.LatestDqcHandler'
          handlerConfigFileName='configDqcHandler.latestModel-InvCat1.0.xml' />

        <!-- other beans could go here -->

      </beanCollection>
    </map>
  </root>
</preferences>

The only implementation of DqcHandler is thredds.dqc.server.latest.LatestDqcHandler. Here is an example of the configuration file listed above ():

<?xml version="1.0" encoding="UTF-8"?>
<latestConfig>

  <!-- Latest datasets on motherlode.ucar.edu served by DODS-3.4.3 servers. -->
  <!-- GFS 80km CONUS (was gfs_211) -->
  <latestItem id="GFS_CONUS_80km" name="GFS 80km CONUS"
              dirLocation="/my/data/netcdf/grid/NCEP/GFS/CONUS_80km"
              datasetNameMatchPattern="([0-9]{4})([0-9]{2})([0-9]{2})_([0-9]{2})([0-9]{2}).nc$"
              datasetTimeSubstitutionPattern="$1-$2-$3T$4:$5:00"
              serviceBaseURL="/thredds/dodsC/modelsNc/NCEP/GFS/CONUS_80km/"
              invCatSpecVersion="1.0" dqcSpecVersion="0.3"/>
  <!-- Add an alias ID for the above item. -->
  <latestItem id="gfs_211" refid="GFS_CONUS_80km"/>

  <!-- Other latestItem elements could be added here. -->

</latestConfig>

Usage

The DQC service provides a web interface for viewing your DQC service items. The DQC service web page is located at:

http://server:port/thredds/dqc/

More Information

More information is available on the DQC Servlet page.

This document is maintained by Unidata and was last updated February 2009. Send comments to THREDDS support.

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