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| <h1>JPA Eclipselink |
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| |
| <p>This example shows how to configure <code>persistence.xml</code> to work with Eclipselink. It uses an <code>@Entity</code> class and a <code>@Stateful</code> bean to add and delete entities from a database.</p> |
| |
| <h2>Creating the JPA Entity</h2> |
| |
| <p>The entity itself is simply a pojo annotated with <code>@Entity</code>. We create one pojo called <code>Movie</code> which we can use to hold movie records.</p> |
| |
| <pre><code>package org.superbiz.eclipselink; |
| |
| import javax.persistence.Entity; |
| import javax.persistence.GeneratedValue; |
| import javax.persistence.GenerationType; |
| import javax.persistence.Id; |
| |
| @Entity |
| public class Movie { |
| |
| @Id |
| @GeneratedValue(strategy = GenerationType.AUTO) |
| private long id; |
| |
| private String director; |
| private String title; |
| private int year; |
| |
| public Movie() { |
| } |
| |
| public Movie(String director, String title, int year) { |
| this.director = director; |
| this.title = title; |
| this.year = year; |
| } |
| |
| public String getDirector() { |
| return director; |
| } |
| |
| public void setDirector(String director) { |
| this.director = director; |
| } |
| |
| public String getTitle() { |
| return title; |
| } |
| |
| public void setTitle(String title) { |
| this.title = title; |
| } |
| |
| public int getYear() { |
| return year; |
| } |
| |
| public void setYear(int year) { |
| this.year = year; |
| } |
| |
| } |
| </code></pre> |
| |
| <h2>Database Operations</h2> |
| |
| <p>This is the bean responsible for database operations; it allows us to persist or delete entities. |
| For more information we recommend you to see <a href="http://tomee.apache.org/examples-trunk/injection-of-entitymanager/README.html">injection-of-entitymanager</a></p> |
| |
| <pre><code>package org.superbiz.eclipselink; |
| |
| import javax.ejb.Stateful; |
| import javax.persistence.EntityManager; |
| import javax.persistence.PersistenceContext; |
| import javax.persistence.PersistenceContextType; |
| import javax.persistence.Query; |
| import java.util.List; |
| |
| @Stateful |
| public class Movies { |
| |
| @PersistenceContext(unitName = "movie-unit", type = PersistenceContextType.EXTENDED) |
| private EntityManager entityManager; |
| |
| public void addMovie(Movie movie) throws Exception { |
| entityManager.persist(movie); |
| } |
| |
| public void deleteMovie(Movie movie) throws Exception { |
| entityManager.remove(movie); |
| } |
| |
| public List<Movie> getMovies() throws Exception { |
| Query query = entityManager.createQuery("SELECT m from Movie as m"); |
| return query.getResultList(); |
| } |
| } |
| </code></pre> |
| |
| <h2>Persistence.xml with EclipseLink configuration</h2> |
| |
| <p>This operation is too easy, just set the <code>provider</code> to <code>org.eclipse.persistence.jpa.PersistenceProvider</code> and add additional properties to the persistence unit. |
| The example has followed a strategy that allows the creation of tables in a HSQL database. |
| For a complete list of persistence unit properties see <a href="http://www.eclipse.org/eclipselink/api/2.4/org/eclipse/persistence/config/PersistenceUnitProperties.html">here</a></p> |
| |
| <pre><code><persistence version="1.0" |
| xmlns="http://java.sun.com/xml/ns/persistence" |
| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" |
| xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"> |
| <persistence-unit name="movie-unit"> |
| <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> |
| <jta-data-source>movieDatabase</jta-data-source> |
| <non-jta-data-source>movieDatabaseUnmanaged</non-jta-data-source> |
| <properties> |
| <property name="eclipselink.target-database" value="org.eclipse.persistence.platform.database.HSQLPlatform"/> |
| <property name="eclipselink.ddl-generation" value="create-tables"/> |
| <property name="eclipselink.ddl-generation.output-mode" value="database"/> |
| </properties> |
| </persistence-unit> |
| </persistence> |
| </code></pre> |
| |
| <h2>MoviesTest</h2> |
| |
| <p>Testing JPA is quite easy, we can simply use the <code>EJBContainer</code> API to create a container in our test case.</p> |
| |
| <pre><code>package org.superbiz.eclipselink; |
| |
| import junit.framework.TestCase; |
| |
| import javax.ejb.embeddable.EJBContainer; |
| import javax.naming.Context; |
| import java.util.List; |
| import java.util.Properties; |
| |
| /** |
| * @version $Revision: 607077 $ $Date: 2007-12-27 06:55:23 -0800 (Thu, 27 Dec 2007) $ |
| */ |
| public class MoviesTest extends TestCase { |
| |
| public void test() throws Exception { |
| Properties p = new Properties(); |
| p.put("movieDatabase", "new://Resource?type=DataSource"); |
| p.put("movieDatabase.JdbcDriver", "org.hsqldb.jdbcDriver"); |
| p.put("movieDatabase.JdbcUrl", "jdbc:hsqldb:mem:moviedb"); |
| |
| final Context context = EJBContainer.createEJBContainer(p).getContext(); |
| |
| Movies movies = (Movies) context.lookup("java:global/jpa-eclipselink/Movies"); |
| |
| movies.addMovie(new Movie("Quentin Tarantino", "Reservoir Dogs", 1992)); |
| movies.addMovie(new Movie("Joel Coen", "Fargo", 1996)); |
| movies.addMovie(new Movie("Joel Coen", "The Big Lebowski", 1998)); |
| |
| List<Movie> list = movies.getMovies(); |
| assertEquals("List.size()", 3, list.size()); |
| |
| for (Movie movie : list) { |
| movies.deleteMovie(movie); |
| } |
| |
| assertEquals("Movies.getMovies()", 0, movies.getMovies().size()); |
| } |
| } |
| </code></pre> |
| |
| <h1>Running</h1> |
| |
| <p>When we run our test case we should see output similar to the following. </p> |
| |
| <pre><code>------------------------------------------------------- |
| T E S T S |
| ------------------------------------------------------- |
| Running org.superbiz.eclipselink.MoviesTest |
| Apache OpenEJB 4.0.0-beta-1 build: 20111002-04:06 |
| http://tomee.apache.org/ |
| INFO - openejb.home = /Users/dblevins/examples/jpa-eclipselink |
| INFO - openejb.base = /Users/dblevins/examples/jpa-eclipselink |
| INFO - Using 'javax.ejb.embeddable.EJBContainer=true' |
| INFO - Configuring Service(id=Default Security Service, type=SecurityService, provider-id=Default Security Service) |
| INFO - Configuring Service(id=Default Transaction Manager, type=TransactionManager, provider-id=Default Transaction Manager) |
| INFO - Configuring Service(id=movieDatabase, type=Resource, provider-id=Default JDBC Database) |
| INFO - Found EjbModule in classpath: /Users/dblevins/examples/jpa-eclipselink/target/classes |
| INFO - Beginning load: /Users/dblevins/examples/jpa-eclipselink/target/classes |
| INFO - Configuring enterprise application: /Users/dblevins/examples/jpa-eclipselink |
| INFO - Configuring Service(id=Default Stateful Container, type=Container, provider-id=Default Stateful Container) |
| INFO - Auto-creating a container for bean Movies: Container(type=STATEFUL, id=Default Stateful Container) |
| INFO - Configuring Service(id=Default Managed Container, type=Container, provider-id=Default Managed Container) |
| INFO - Auto-creating a container for bean org.superbiz.eclipselink.MoviesTest: Container(type=MANAGED, id=Default Managed Container) |
| INFO - Configuring PersistenceUnit(name=movie-unit, provider=org.eclipse.persistence.jpa.PersistenceProvider) |
| INFO - Auto-creating a Resource with id 'movieDatabaseNonJta' of type 'DataSource for 'movie-unit'. |
| INFO - Configuring Service(id=movieDatabaseNonJta, type=Resource, provider-id=movieDatabase) |
| INFO - Adjusting PersistenceUnit movie-unit <non-jta-data-source> to Resource ID 'movieDatabaseNonJta' from 'movieDatabaseUnmanaged' |
| INFO - Enterprise application "/Users/dblevins/examples/jpa-eclipselink" loaded. |
| INFO - Assembling app: /Users/dblevins/examples/jpa-eclipselink |
| INFO - PersistenceUnit(name=movie-unit, provider=org.eclipse.persistence.jpa.PersistenceProvider) - provider time 511ms |
| INFO - Jndi(name="java:global/jpa-eclipselink/Movies!org.superbiz.eclipselink.Movies") |
| INFO - Jndi(name="java:global/jpa-eclipselink/Movies") |
| INFO - Jndi(name="java:global/EjbModule225280863/org.superbiz.eclipselink.MoviesTest!org.superbiz.eclipselink.MoviesTest") |
| INFO - Jndi(name="java:global/EjbModule225280863/org.superbiz.eclipselink.MoviesTest") |
| INFO - Created Ejb(deployment-id=Movies, ejb-name=Movies, container=Default Stateful Container) |
| INFO - Created Ejb(deployment-id=org.superbiz.eclipselink.MoviesTest, ejb-name=org.superbiz.eclipselink.MoviesTest, container=Default Managed Container) |
| INFO - Started Ejb(deployment-id=Movies, ejb-name=Movies, container=Default Stateful Container) |
| INFO - Started Ejb(deployment-id=org.superbiz.eclipselink.MoviesTest, ejb-name=org.superbiz.eclipselink.MoviesTest, container=Default Managed Container) |
| INFO - Deployed Application(path=/Users/dblevins/examples/jpa-eclipselink) |
| Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 3.188 sec |
| |
| Results : |
| |
| Tests run: 1, Failures: 0, Errors: 0, Skipped: 0 |
| </code></pre> |
| |
| |
| <div class="page-header"> </div> |
| <h4>APIs Used</h4> |
| <ul><li><a href="http://docs.oracle.com/javaee/6/api/javax/ejb/Stateful.html">javax.ejb.Stateful</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/ejb/embeddable/EJBContainer.html">javax.ejb.embeddable.EJBContainer</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/naming/Context.html">javax.naming.Context</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/persistence/Entity.html">javax.persistence.Entity</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/persistence/EntityManager.html">javax.persistence.EntityManager</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/persistence/GeneratedValue.html">javax.persistence.GeneratedValue</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/persistence/GenerationType.html">javax.persistence.GenerationType</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/persistence/Id.html">javax.persistence.Id</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/persistence/PersistenceContext.html">javax.persistence.PersistenceContext</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/persistence/PersistenceContextType.html">javax.persistence.PersistenceContextType</a></li> |
| <li><a href="http://docs.oracle.com/javaee/6/api/javax/persistence/Query.html">javax.persistence.Query</a></li> |
| </ul> |
| |
| <h3>Source</h3> |
| <ul> |
| <li>Apache <a href="http://svn.apache.org/repos/asf/tomee/tomee/trunk/examples/jpa-eclipselink">jpa-eclipselink</a></li> |
| <li>Github <a href="https://github.com/apache/tomee/tree/trunk/examples/jpa-eclipselink">jpa-eclipselink</a></li> |
| </ul> |
| <pre> |
| svn co http://svn.apache.org/repos/asf/tomee/tomee/trunk/examples/jpa-eclipselink |
| cd jpa-eclipselink |
| mvn clean install |
| </pre> |
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