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<h1>Persistence Fragment</h1>
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<div class="col-md-12">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>The JPA provides Java developers with an object/relational mapping facility for managing relational data in Java applications.</p>
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<div class="paragraph">
<p>@Entity define the entity class that you want to convert into a table in a database.
@Id define the main key of the table.
@GeneratedValue provides for the specification of generation strategies for the values of primary keys.</p>
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<div class="sect1">
<h2 id="_movie">Movie</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.injection.jpa;
import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.Id;
@Entity
public class Movie {
@Id
@GeneratedValue
private long id;
private String director;
private String title;
private int year;
public Movie() {
// no-op
}
public Movie(String director, String title, int year) {
this.director = director;
this.title = title;
this.year = year;
}
public long getId() {
return id;
}
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>
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<div class="sect1">
<h2 id="_persistence_fragment_xml">persistence-fragment.xml</h2>
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<div class="literalblock">
<div class="content">
<pre>&lt;persistence-fragment version="2.0"&gt;
&lt;persistence-unit-fragment name="movie-unit"&gt;
&lt;class&gt;org.superbiz.injection.jpa.Movie&lt;/class&gt;
&lt;exclude-unlisted-classes&gt;true&lt;/exclude-unlisted-classes&gt;
&lt;/persistence-unit-fragment&gt;
&lt;/persistence-fragment&gt;</pre>
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<div class="sect1">
<h2 id="_moviestest">MoviesTest</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.injection.jpa;
import org.apache.openejb.assembler.classic.ReloadableEntityManagerFactory;
import org.junit.Test;
import jakarta.ejb.embeddable.EJBContainer;
import javax.naming.Context;
import jakarta.persistence.EntityManagerFactory;
import jakarta.persistence.PersistenceUnit;
import java.util.Properties;
import static org.junit.Assert.assertTrue;
public class MoviesTest {
@PersistenceUnit
private EntityManagerFactory emf;
@Test
public void test() throws Exception {
final 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 EJBContainer container = EJBContainer.createEJBContainer(p);
final Context context = container.getContext();
context.bind("inject", this);
assertTrue(((ReloadableEntityManagerFactory) emf).getManagedClasses().contains(Movie.class.getName()));
container.close();
}
}</code></pre>
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<div class="sect1">
<h2 id="_persistence_xml">persistence.xml</h2>
<div class="sectionbody">
<div class="literalblock">
<div class="content">
<pre>&lt;persistence version="2.0"
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_2_0.xsd"&gt;
&lt;persistence-unit name="movie-unit"&gt;
&lt;jta-data-source&gt;movieDatabase&lt;/jta-data-source&gt;
&lt;non-jta-data-source&gt;movieDatabaseUnmanaged&lt;/non-jta-data-source&gt;
&lt;properties&gt;
&lt;property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema(ForeignKeys=true)"/&gt;
&lt;/properties&gt;
&lt;/persistence-unit&gt;
&lt;/persistence&gt;</pre>
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