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Running the code generator with Maven

Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition

There is no substantial difference between running the code generator with Maven or in standalone mode. Both modes use the exact same <configuration/> element. The Maven plugin configuration adds some additional boilerplate around that:

<plugin>
  <!-- Specify the maven code generator plugin -->
  <!-- Use org.jooq              for the Open Source Edition
           org.jooq.pro          for commercial editions with Java 11 support,
           org.jooq.pro-java-8   for commercial editions with Java 8 support,
           org.jooq.pro-java-6   for commercial editions with Java 6 support,
           org.jooq.trial        for the free trial edition with Java 11 support,
           org.jooq.trial-java-8 for the free trial edition with Java 8 support,
           org.jooq.trial-java-6 for the free trial edition with Java 6 support
  
   Note: Only the Open Source Edition is hosted on Maven Central.
         Install the others locally using the provided scripts, or access them from here: https://repo.jooq.org
         See the JDK version support matrix here: https://www.jooq.org/download/support-matrix-jdk -->

  <groupId>org.jooq</groupId>
  <artifactId>jooq-codegen-maven</artifactId>
  <version>3.10.8</version>

  <executions>
    <execution>
      <id>jooq-codegen</id>
      <phase>generate-sources</phase>
      <goals>
        <goal>generate</goal>
      </goals>
    </execution>
  </executions>

  <configuration>
    ...
  </configuration>
</plugin>

Additional Maven-specific flags

There are, however, some additional, Maven-specific flags that can be specified with the jooq-codegen-maven plugin only:

<plugin>
  <configuration>

    <!-- A boolean property (or constant) can be specified here to tell the plugin not to do anything -->
    <skip>${skip.jooq.generation}</skip>

    <!-- Instead of providing an inline configuration here, you can specify an external XML configuration file here -->
    <configurationFile>${externalfile}</configurationFile>

    <!-- Alternatively, you can provide several external configuration files. These will be merged by using
         Maven's combine.children="append" policy -->
    <configurationFiles>
      <configurationFile>${file1}</configurationFile>
      <configurationFile>${file2}</configurationFile>
      <configurationFile>...</configurationFile>
    </configurationFiles>
  </configuration>
</plugin>

Maven plugin inheritance mechanism

As with any other Maven plugin configuration, you can profit from Maven's powerful plugin inheritance mechanism. This is particularly useful when you configure several code generation runs for jOOQ, e.g.

Different configurations for different tenants
Different configurations for different schemas
Different configurations for different environments

One approach would be to use a <pluginManagement/> configuration

<pluginManagement>
  <plugins>
    <plugin>
	  <!-- Use org.jooq              for the Open Source Edition
	           org.jooq.pro          for commercial editions,
	           org.jooq.pro-java-8   for commercial editions with Java 8 support,
	           org.jooq.pro-java-6   for commercial editions with Java 6 support,
               org.jooq.trial        for the free trial edition,
               org.jooq.trial-java-8 for the free trial edition with Java 8 support,
               org.jooq.trial-java-6 for the free trial edition with Java 6 support

           Note: Only the Open Source Edition is hosted on Maven Central.
                 Install the others locally using the provided scripts, or access them from here: https://repo.jooq.org -->
      <groupId>org.jooq</groupId>
      <artifactId>jooq-codegen-maven</artifactId>
      <configuration>

        <!-- Log at WARN level by default -->
        <logging>WARN</logging>
        <generator>
          <generate>

            <!-- Never generate deprecated code -->
            <deprecated>false</deprecated>
          </generate>
          <database>
            <forcedTypes>

              <!-- Use BIGINT for all ID columns -->
              <forcedType>
                <name>BIGINT</name>
                <includeExpression>ID</includeExpression>
              </forcedType>
            </forcedTypes>
          </database>
        </generator>
      </configuration>
    </plugin>
  </plugins>
</pluginManagement>

The above now applies to all of your jooq-codegen-maven plugin configurations by default. Now, in some module or execution, you may want to enhance / override the above defaults:

<plugin>
  <groupId>org.jooq</groupId>
  <artifactId>jooq-codegen-maven</artifactId>
  <configuration>

    <!-- Log at INFO level by in this particular configuration -->
    <logging>INFO</logging>
    <generator>
      <database>
        <!-- Append additional forced type children to the default, rather
             than merging or replacing the default -->
        <forcedTypes combine.children="append">
          <forcedType>
            <name>BIGINT</name>
            <includeExpression>.*_ID</includeExpression>
          </forcedType>
        </forcedTypes>
      </database>
    </generator>
  </configuration>
</plugin>

Another approach is to use multiple executions:

Multiple executions

As with any Maven plugin, jOOQ's maven code generation plugin can be executed multiple times, inheriting the common configuration in each execution:

<plugin>
  <!-- Use org.jooq              for the Open Source Edition
           org.jooq.pro          for commercial editions with Java 11 support,
           org.jooq.pro-java-8   for commercial editions with Java 8 support,
           org.jooq.pro-java-6   for commercial editions with Java 6 support,
           org.jooq.trial        for the free trial edition with Java 11 support,
           org.jooq.trial-java-8 for the free trial edition with Java 8 support,
           org.jooq.trial-java-6 for the free trial edition with Java 6 support
  
   Note: Only the Open Source Edition is hosted on Maven Central.
         Install the others locally using the provided scripts, or access them from here: https://repo.jooq.org
         See the JDK version support matrix here: https://www.jooq.org/download/support-matrix-jdk -->

  <groupId>org.jooq</groupId>
  <artifactId>jooq-codegen-maven</artifactId>

  <!-- Common configuration inherited by all executions -->
  <configuration>

    <!-- Log at WARN level by default -->
    <logging>WARN</logging>
    <generator>
      <generate>

        <!-- Never generate deprecated code -->
        <deprecated>false</deprecated>
      </generate>
      <database>
        <forcedTypes>

          <!-- Use BIGINT for all ID columns -->
          <forcedType>
            <name>BIGINT</name>
            <includeExpression>ID</includeExpression>
          </forcedType>
        </forcedTypes>
      </database>
    </generator>
  </configuration>

  <!-- Multiple executions with their own, specific configurations -->
  <executions>
    <execution>
      <id>generate-tenant-1</id>
      <phase>generate-sources</phase>
      <goals>
        <goal>generate</goal>
      </goals>
      <configuration>
        ...
      </configuration>
    <execution>

    <execution>
      <id>generate-tenant-2</id>
      <phase>generate-sources</phase>
      <goals>
        <goal>generate</goal>
      </goals>
      <configuration>
        ...
      </configuration>
    <execution>
  </executions>
</plugin>

Please refer to the Maven documentation for more details.

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Running the code generator with Maven

Additional Maven-specific flags

Maven plugin inheritance mechanism

Multiple executions

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