You are viewing the documentation for the 2.0 release in the 2.0.x series of releases. The latest stable release series is 2.5.x.

§Integrating with JPA

§Exposing the datasource through JNDI

JPA requires the datasource to be accessible via JNDI. You can expose any Play-managed datasource via JDNI by adding this configuration in conf/application.conf:


§Adding a JPA implementation to your project

There is no built-in JPA implementation in Play 2.0; you can choose any available implementation. For example, to use Hibernate, just add the dependency to your project:

val appDependencies = Seq(
  "org.hibernate" % "hibernate-entitymanager" % "3.6.9.Final"

§Creating a persistence unit

Next you have to create a proper persistence.xml JPA configuration file. Put it into the conf/META-INF directory, so it will be properly added to your classpath.

Here is a sample configuration file to use with Hibernate:

<persistence xmlns=""
    <persistence-unit name="defaultPersistenceUnit" transaction-type="RESOURCE_LOCAL">
            <property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect"/>

§Annotating JPA actions with @Transactional

Every JPA call must be done in a transaction so, to enable JPA for a particular action, annotate it with @play.db.jpa.Transactional. This will compose your action method with a JPA Action that manages the transaction for you:

public static Result index() {

If your action perfoms only queries, you can set the readOnly attribute to true:

public static Result index() {

§Using the play.db.jpa.JPA helper

At any time you can retrieve the current entity manager from the play.db.jpa.JPA helper class:

public static Company findById(Long id) {
  return JPA.em().find(Company.class, id);

Next: Using the cache