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From "Hyunsik Choi (JIRA)" <j...@apache.org>
Subject [jira] [Created] (TAJO-456) Separate tajo-jdbc and tajo-client from tajo-core-backend
Date Sat, 28 Dec 2013 11:13:50 GMT
Hyunsik Choi created TAJO-456:
---------------------------------

             Summary: Separate tajo-jdbc and tajo-client from tajo-core-backend
                 Key: TAJO-456
                 URL: https://issues.apache.org/jira/browse/TAJO-456
             Project: Tajo
          Issue Type: Improvement
          Components: build
            Reporter: Hyunsik Choi
            Assignee: Hyunsik Choi
             Fix For: 0.8-incubating


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:

{noformat}
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
{noformat}

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:

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

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



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