Execute sql script after jpa/EclipseLink created tables?

Question

is there a possibility to execute an sql script, after EclipseLink generated the ddl?
In other words, is it possible that the EclipseLink property "eclipselink.ddl-generation" with "drop-and-create-tables" is used and EclipseLink executes another sql-file (to insert some data into some tables just created) after creating the table definition?

I'm using EclipseLink 2.x and JPA 2.0 with GlassFish v3.

Or can I init the tables within a java method which is called on the project (war with ejb3) deployment?

Answer 1

I came across this question for the same reasons, trying to find an approach to run an initialization script after DDL generation. I offer this answer to an old question in hopes of shortening the amount of "literary research" for those looking for the same solution.

I'm using GlassFish 4 with its default EclipseLink 2.5 JPA implementation. The new Schema Generation feature under JPA 2.1 makes it fairly straightforward to specify an "initialization" script after DDL generation is completed.

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1"
xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
    <persistence-unit name="cbesDatabase" transaction-type="JTA">
        <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
        <jta-data-source>java:app/jdbc/cbesPool</jta-data-source>
        <properties>
            <property name="javax.persistence.schema-generation.database.action" value="drop-and-create"/>
            <property name="javax.persistence.schema-generation.create-source" value="metadata"/>
            <property name="javax.persistence.schema-generation.drop-source" value="metadata"/>
            <property name="javax.persistence.sql-load-script-source" value="META-INF/sql/load_script.sql"/>
            <property name="eclipselink.logging.level" value="FINE"/> 
        </properties>
    </persistence-unit>
</persistence>

The above configuration generates DDL scripts from metadata (i.e. annotations) after which the META-INF/sql/load_script.sql script is run to populate the database. In my case, I seed a few tables with test data and generate additional views.

Additional information on EclipseLink's use of JPA's properties can be found in the DDL Generation section of EclipseLink/Release/2.5/JPA21. Likewise, Section 37.5 Database Schema Creation in Oracle's Java EE 7 Tutorial and TOTD #187 offer a quick introduction also.