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  1. Tajo
  2. TAJO-456

Separate tajo-jdbc and tajo-client from tajo-core-backend

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.8.0
    • Component/s: Build
    • Labels:
      None

      Description

      Currently, tajo-client and tajo-jdbc are included in tajo-core-backend, which depends on lots of third-party libraries. So, even just client programs should include unnecessary third-party libraries. This patch separates tajo-jdbc and tajo-client from tajo-core-backend to individual maven modules. As a result, the client and jdbc's dependencies are more simplified than before.

      After this patch, 'mvn package -Pdist' commands generates tajo jdbc drivers in ${TAJO_HOME}/tajo-dist/target/tajo-${tajo.version}/share/jdbc-dist. There will be the following files in the directory:

      joda-time-2.3.jar
      tajo-catalog-common-0.8.0-SNAPSHOT.jar
      tajo-client-0.8.0-SNAPSHOT.jar
      tajo-common-0.8.0-SNAPSHOT.jar
      tajo-jdbc-0.8.0-SNAPSHOT.jar
      tajo-rpc-0.8.0-SNAPSHOT.jar
      tajo-storage-0.8.0-SNAPSHOT.jar
      

      In order to load the Tajo JDBC driver, client programs must be able to locate the all above JAR files* and hadoop's JAR files.

      For that, users should set classpath for them. If the jar files are located in the directory '/usr/local/share/tajo-jdbc' and hadoop binary is located in '/opt/hadoop', you should set classpath as follows:

      export CLASSPATH=`/opt/hadoop/bin/hadoop classpath`:/usr/local/share/tajo-jdbc/*:$CLASSPATH
      

      Note that the command '${HADOOP_HOME}/bin/hadoop classpath' prints out hadoop's classpaths via stdout.

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            • Assignee:
              hyunsik Hyunsik Choi
              Reporter:
              hyunsik Hyunsik Choi
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              • Created:
                Updated:
                Resolved: