Set up the development environment
You can create a Hive UDF in a development environment using IntelliJ, for example, and build the UDF with Hive and Hadoop JARS that you download from your Cloudera cluster.
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On your cluster, locate the hadoop-common-<version>.jar and
hive-exec-<version>.jar.
For example:
ls /opt/cloudera/parcels/CDH-7.0.0-* |grep -v test /opt/cloudera/parcels/CDH-7. . ..jar
- Download the JARs to your development computer to add to your IntelliJ project later.
- Open IntelliJ and create a new Maven-based project. Click Create New Project. Select Maven and the supported Java version as the Project SDK. Click Next.
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Add archetype information.
For example:
- GroupId: com.mycompany.hiveudf
- ArtifactId: hiveudf
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Click Next and Finish.
The generated pom.xml appears in
sample-hiveudf. -
To the
pom.xml, add properties to facilitate versioning.For example:<properties> <hadoop.version>TBD</hadoop.version> <hive.version>TBD</hive.version> </properties>
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In the pom.xml, define the repositories.
Use internal repositories if you do not have internet access.
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Define dependencies.
For example:
<dependencies> <dependency> <groupId>org.apache.hive</groupId> <artifactId>hive-exec</artifactId> <version>${hive.version}</version> </dependency> <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-common</artifactId> <version>${hadoop.version}</version> </dependency> </dependencies> - Select File > Project Structure. Click Modules. On the Dependencies tab, click + to add JARS or directories. Browse to and select the JARs you downloaded in step 1.
