Maven Plugin for DDL Generation

Introduction

DDL Generator is a Maven plugin to generate DDL file from a Maven project using JPA/Hibernate. It has been created as a (very) partial replacement of the Maven Hibernate3 Plugin which is not working under Hibernate 4.

Features

• Simple generation of DDL file as part of the Maven build processs.
• Support for entities dispatched on multiple PU by embedding MultiConfigAwarePersistenceUnitManager.
• Support for any Hibernate dialect or naming strategy.

Usage

Goals

The plugin has one goal: generate. It takes the following mandatory parameters:

• ddlFile: destination ddl file.
• dialect: full class name of the dialect to use for the generation.
• persistenceUnitName: name of the persistence unit.

And the following optional parameters:

• defaultSchema: the schema to use if an explicit schema naming is required in the DDL file.
• namingStrategy: the class name of the naming strategy to use if the default one is not ok.
• persistenceXmlLocations: a list of persistence unit definition files.
• useNewGenerator: set to true is the new hibernate id generator should be used.

Configuration

The following configuration needs to be inserted in the pom.xml file:

<plugin>
    <groupId>net.ggtools.maven</groupId>
    <artifactId>ddlgenerator-maven-plugin</artifactId>
    <version>0.1</version>
    <executions>
        <execution>
            <goals>
                <goal>generate</goal>
            </goals>
            <phase>prepare-package</phase>
            <configuration>
                <ddlFile>${project.build.directory}/sql/schema.sql</ddlFile>
                <!--<defaultSchema></defaultSchema>-->
                <dialect>org.hibernate.dialect.H2Dialect</dialect>
                <!--<namingStrategy></namingStrategy>-->
                <persistenceUnitName>MultiPU</persistenceUnitName>
                <persistenceXmlLocations>
                    <param>classpath*:/META-INF/persistence.xml</param>
                    <param>classpath*:/META-INF/persistence-*.xml</param>
                </persistenceXmlLocations>
                <useNewGenerator>true</useNewGenerator>
            </configuration>
        </execution>
    </executions>
</plugin>

Source and Issue tracking

The source repository and issue tracking is hosted on GitHub.

History

• 0.1: First public release.