blob: f538fba44c6d1ac6577af5f5e0afb22295464120 [file] [log] [blame]
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Apache TomEE</title>
<meta name="description"
content="Apache TomEE is a lightweight, yet powerful, JavaEE Application server with feature rich tooling." />
<meta name="keywords" content="tomee,asf,apache,javaee,jee,shade,embedded,test,junit,applicationcomposer,maven,arquillian" />
<meta name="author" content="Luka Cvetinovic for Codrops" />
<link rel="icon" href="../../../favicon.ico">
<link rel="icon" type="image/png" href="../../../favicon.png">
<meta name="msapplication-TileColor" content="#80287a">
<meta name="theme-color" content="#80287a">
<link rel="stylesheet" type="text/css" href="../../../css/normalize.css">
<link rel="stylesheet" type="text/css" href="../../../css/bootstrap.css">
<link rel="stylesheet" type="text/css" href="../../../css/owl.css">
<link rel="stylesheet" type="text/css" href="../../../css/animate.css">
<link rel="stylesheet" type="text/css" href="../../../fonts/font-awesome-4.1.0/css/font-awesome.min.css">
<link rel="stylesheet" type="text/css" href="../../../fonts/eleganticons/et-icons.css">
<link rel="stylesheet" type="text/css" href="../../../css/jqtree.css">
<link rel="stylesheet" type="text/css" href="../../../css/idea.css">
<link rel="stylesheet" type="text/css" href="../../../css/cardio.css">
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-2717626-1']);
_gaq.push(['_setDomainName', 'apache.org']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
</head>
<body>
<div class="preloader">
<img src="../../../img/loader.gif" alt="Preloader image">
</div>
<nav class="navbar">
<div class="container">
<div class="row"> <div class="col-md-12">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="/">
<span>
<img src="../../../img/logo-active.png">
</span>
Apache TomEE
</a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav navbar-right main-nav">
<li><a href="../../../docs.html">Documentation</a></li>
<li><a href="../../../community/index.html">Community</a></li>
<li><a href="../../../security/security.html">Security</a></li>
<li><a href="../../../download-ng.html">Downloads</a></li>
</ul>
</div>
<!-- /.navbar-collapse -->
</div></div>
</div>
<!-- /.container-fluid -->
</nav>
<div id="main-block" class="container main-block">
<div class="row title">
<div class="col-md-12">
<div class='page-header'>
<h1>Inyección de Entitymanager</h1>
</div>
</div>
</div>
<div class="row">
<div class="col-md-12">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>Este ejemplo muestra el uso de <code>@ PersistenceContext</code> para tener un` EntityManager` con un
Contexto de persistencia <code>EXTENDIDO</code> inyectado en un` @Stateful bean`. Se usa Un JPA bean <code>@ Entity</code>
con el ` EntityManager` para crear, persistir y fusionar datos a una base de datos.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_creando_el_jpa_entity">Creando el JPA Entity</h2>
<div class="sectionbody">
<div class="paragraph">
<p>La entidad es simplemente un pojo anotado con <code>@ Entity</code>. Creamos una clase <code>Movie</code> que podemos usar para guardar registros de películas.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.injection.jpa;
import javax.persistence.Entity;
@Entity
public class Movie {
@Id @GeneratedValue
private long id;
private String director;
private String title;
private int year;
public Movie() {
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
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>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_configurando_el_entitymanager_con_un_archivo_persistence_xml">Configurando el EntityManager con un archivo persistence.xml</h2>
<div class="sectionbody">
<div class="paragraph">
<p>La entidad <code>Movie</code> se puede crear, eliminar, o actualizar mediante un objeto` EntityManager`. El <code>EntityManager</code> en sí mismo es
configurado a través de un archivo <code>META-INF/persistence.xml</code> que se ubica en el mismo jar que la entidad <code>Movie</code>.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-xml" data-lang="xml">&lt;persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0"&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;class&gt;org.superbiz.injection.jpa.Movie&lt;/class&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;</code></pre>
</div>
</div>
<div class="paragraph">
<p>Observe que la entidad <code>Movie</code> se lista a través de un elemento <code>&lt;class&gt;</code>. Esto no es obligatorio, pero puede ayudar durante las pruebas o cuando la clase <code>Movie</code> se encuentra en un jar diferente al que contiene el archivo <code>persistence.xml</code>.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_inyección_a_través_de_persistencecontext">Inyección a través de @PersistenceContext</h2>
<div class="sectionbody">
<div class="paragraph">
<p>El <code>EntityManager</code> en sí mismo es creado por el contenedor utilizando la información en <code>persistence.xml</code>, para usarlo en
tiempo de ejecución, simplemente necesitamos solicitar que se inyecte en uno de nuestros componentes. Hacemos esto a través de
la anotación <code>@ PersistenceContext</code></p>
</div>
<div class="paragraph">
<p>La anotación <code>@ PersistenceContext</code> se puede usar en cualquier bean CDI, EJB, Servlet, Servlet Listener, Servlet Filter o JSF ManagedBean. Si no se usa un EJB, sera necesario usar una <code>UserTransaction</code> para comenzar (begin) y confirmar (commit) las transacciones manualmente. Se requiere una transacción para que funcione cualquiera de los métodos de creación, actualización o eliminación del EntityManager.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.injection.jpa;
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&lt;Movie&gt; getMovies() throws Exception {
Query query = entityManager.createQuery("SELECT m from Movie as m");
return query.getResultList();
}
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>Este <code>EntityManager</code> en particular se inyecta como un contexto de persistencia <code>EXTENDED</code>, lo que simplemente significa que el <code>EntityManager</code> se crea cuando se crea el bean <code>@ Stateful</code> y se destruye cuando se destruye el bean <code>@Stateful</code>. En pocas palabras,
los datos en el <code>EntityManager</code> se almacenan en caché durante la vida útil del bean <code>@Stateful</code>.</p>
</div>
<div class="paragraph">
<p>El uso de contextos de persistencia <code>EXTENDED</code> está <strong>solo</strong> disponible para beans <code>@Stateful</code>. Consulte el enlace: <a href="../../jpa-concepts.html">JPA Concepts</a> para obtener una explicación de alto nivel de lo que realmente es un "contexto de persistencia" y cómo es importante para JPA.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_moviestest">MoviesTest</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Probar JPA es bastante fácil, simplemente podemos usar la API <code>EJBContainer</code> para crear un contenedor en nuestro caso de prueba.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-java" data-lang="java">package org.superbiz.injection.jpa;
import junit.framework.TestCase;
import javax.ejb.embeddable.EJBContainer;
import javax.naming.Context;
import java.util.List;
import java.util.Properties;
//START SNIPPET: code
public class MoviesTest extends TestCase {
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 Context context = EJBContainer.createEJBContainer(p).getContext();
Movies movies = (Movies) context.lookup("java:global/injection-of-entitymanager/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&lt;Movie&gt; 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>
</div>
</div>
</div>
</div>
<h1 id="_ejecución" class="sect0">Ejecución</h1>
<div class="paragraph">
<p>Cuando ejecutamos nuestro caso de prueba, deberíamos ver una salida similar a la siguiente.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="highlight"><code class="language-console" data-lang="console">-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running org.superbiz.injection.jpa.MoviesTest
Apache OpenEJB 4.0.0-beta-1 build: 20111002-04:06
http://tomee.apache.org/
INFO - openejb.home = /Users/dblevins/examples/injection-of-entitymanager
INFO - openejb.base = /Users/dblevins/examples/injection-of-entitymanager
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/injection-of-entitymanager/target/classes
INFO - Beginning load: /Users/dblevins/examples/injection-of-entitymanager/target/classes
INFO - Configuring enterprise application: /Users/dblevins/examples/injection-of-entitymanager
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.injection.jpa.MoviesTest: Container(type=MANAGED, id=Default Managed Container)
INFO - Configuring PersistenceUnit(name=movie-unit)
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 &lt;non-jta-data-source&gt; to Resource ID 'movieDatabaseNonJta' from 'movieDatabaseUnmanaged'
INFO - Enterprise application "/Users/dblevins/examples/injection-of-entitymanager" loaded.
INFO - Assembling app: /Users/dblevins/examples/injection-of-entitymanager
INFO - PersistenceUnit(name=movie-unit, provider=org.apache.openjpa.persistence.PersistenceProviderImpl) - provider time 462ms
INFO - Jndi(name="java:global/injection-of-entitymanager/Movies!org.superbiz.injection.jpa.Movies")
INFO - Jndi(name="java:global/injection-of-entitymanager/Movies")
INFO - Jndi(name="java:global/EjbModule1461341140/org.superbiz.injection.jpa.MoviesTest!org.superbiz.injection.jpa.MoviesTest")
INFO - Jndi(name="java:global/EjbModule1461341140/org.superbiz.injection.jpa.MoviesTest")
INFO - Created Ejb(deployment-id=Movies, ejb-name=Movies, container=Default Stateful Container)
INFO - Created Ejb(deployment-id=org.superbiz.injection.jpa.MoviesTest, ejb-name=org.superbiz.injection.jpa.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.injection.jpa.MoviesTest, ejb-name=org.superbiz.injection.jpa.MoviesTest, container=Default Managed Container)
INFO - Deployed Application(path=/Users/dblevins/examples/injection-of-entitymanager)
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.301 sec
Results :
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0</code></pre>
</div>
</div>
<div class="sect1">
<h2 id="_apis_used">APIs Used</h2>
<div class="sectionbody">
<div class="ulist">
<ul>
<li>
<p><a href="../../../jakartaee-8.0/javadoc/javax/ejb/Stateful.html">javax.ejb.Stateful</a></p>
</li>
<li>
<p><a href="../../../jakartaee-8.0/javadoc/javax/ejb/embeddable/EJBContainer.html">javax.ejb.embeddable.EJBContainer</a></p>
</li>
<li>
<p><a href="../../../jakartaee-8.0/javadoc/javax/persistence/Entity.html">javax.persistence.Entity</a></p>
</li>
<li>
<p><a href="../../../jakartaee-8.0/javadoc/javax/persistence/EntityManager.html">javax.persistence.EntityManager</a></p>
</li>
<li>
<p><a href="../../../jakartaee-8.0/javadoc/javax/persistence/GeneratedValue.html">javax.persistence.GeneratedValue</a></p>
</li>
<li>
<p><a href="../../../jakartaee-8.0/javadoc/javax/persistence/Id.html">javax.persistence.Id</a></p>
</li>
<li>
<p><a href="../../../jakartaee-8.0/javadoc/javax/persistence/PersistenceContext.html">javax.persistence.PersistenceContext</a></p>
</li>
<li>
<p><a href="../../../jakartaee-8.0/javadoc/javax/persistence/PersistenceContextType.html">javax.persistence.PersistenceContextType</a></p>
</li>
<li>
<p><a href="../../../jakartaee-8.0/javadoc/javax/persistence/Query.html">javax.persistence.Query</a></p>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
<footer>
<div class="container">
<div class="row">
<div class="col-sm-6 text-center-mobile">
<h3 class="white">Be simple. Be certified. Be Tomcat.</h3>
<h5 class="light regular light-white">"A good application in a good server"</h5>
<ul class="social-footer">
<li><a href="https://www.facebook.com/ApacheTomEE/"><i class="fa fa-facebook"></i></a></li>
<li><a href="https://twitter.com/apachetomee"><i class="fa fa-twitter"></i></a></li>
<li><a href="https://plus.google.com/communities/105208241852045684449"><i class="fa fa-google-plus"></i></a></li>
</ul>
</div>
<div class="col-sm-6 text-center-mobile">
<div class="row opening-hours">
<div class="col-sm-3 text-center-mobile">
<h5><a href="../../../latest/docs/" class="white">Documentation</a></h5>
<ul class="list-unstyled">
<li><a href="../../../latest/docs/admin/configuration/index.html" class="regular light-white">How to configure</a></li>
<li><a href="../../../latest/docs/admin/file-layout.html" class="regular light-white">Dir. Structure</a></li>
<li><a href="../../../latest/docs/developer/testing/index.html" class="regular light-white">Testing</a></li>
<li><a href="../../../latest/docs/admin/cluster/index.html" class="regular light-white">Clustering</a></li>
</ul>
</div>
<div class="col-sm-3 text-center-mobile">
<h5><a href="../../../latest/examples/" class="white">Examples</a></h5>
<ul class="list-unstyled">
<li><a href="../../../latest/examples/simple-cdi-interceptor.html" class="regular light-white">CDI Interceptor</a></li>
<li><a href="../../../latest/examples/rest-cdi.html" class="regular light-white">REST with CDI</a></li>
<li><a href="../../../latest/examples/ejb-examples.html" class="regular light-white">EJB</a></li>
<li><a href="../../../latest/examples/jsf-managedBean-and-ejb.html" class="regular light-white">JSF</a></li>
</ul>
</div>
<div class="col-sm-3 text-center-mobile">
<h5><a href="../../../community/index.html" class="white">Community</a></h5>
<ul class="list-unstyled">
<li><a href="../../../community/contributors.html" class="regular light-white">Contributors</a></li>
<li><a href="../../../community/social.html" class="regular light-white">Social</a></li>
<li><a href="../../../community/sources.html" class="regular light-white">Sources</a></li>
</ul>
</div>
<div class="col-sm-3 text-center-mobile">
<h5><a href="../../../security/index.html" class="white">Security</a></h5>
<ul class="list-unstyled">
<li><a href="http://apache.org/security" target="_blank" class="regular light-white">Apache Security</a></li>
<li><a href="http://apache.org/security/projects.html" target="_blank" class="regular light-white">Security Projects</a></li>
<li><a href="http://cve.mitre.org" target="_blank" class="regular light-white">CVE</a></li>
</ul>
</div>
</div>
</div>
</div>
<div class="row bottom-footer text-center-mobile">
<div class="col-sm-12 light-white">
<p>Copyright &copy; 1999-2016 The Apache Software Foundation, Licensed under the Apache License, Version 2.0. Apache TomEE, TomEE, Apache, the Apache feather logo, and the Apache TomEE project logo are trademarks of The Apache Software Foundation. All other marks mentioned may be trademarks or registered trademarks of their respective owners.</p>
</div>
</div>
</div>
</footer>
<!-- Holder for mobile navigation -->
<div class="mobile-nav">
<ul>
<li><a hef="../../../latest/docs/admin/index.html">Administrators</a>
<li><a hef="../../../latest/docs/developer/index.html">Developers</a>
<li><a hef="../../../latest/docs/advanced/index.html">Advanced</a>
<li><a hef="../../../community/index.html">Community</a>
</ul>
<a href="#" class="close-link"><i class="arrow_up"></i></a>
</div>
<!-- Scripts -->
<script src="../../../js/jquery-1.11.1.min.js"></script>
<script src="../../../js/owl.carousel.min.js"></script>
<script src="../../../js/bootstrap.min.js"></script>
<script src="../../../js/wow.min.js"></script>
<script src="../../../js/typewriter.js"></script>
<script src="../../../js/jquery.onepagenav.js"></script>
<script src="../../../js/tree.jquery.js"></script>
<script src="../../../js/highlight.pack.js"></script>
<script src="../../../js/main.js"></script>
</body>
</html>