h1. Overview

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<object width="400" height="250"><param name="movie" value="http://www.youtube.com/v/s4uiIoAehgQ?fs=1&amp;hl=en_US&amp;rel=0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/s4uiIoAehgQ?fs=1&amp;hl=en_US&amp;rel=0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="400" height="250"></embed></object>

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Shows use of *@PersistenceContext* to have an *EntityManager* with an *EXTENDED* persistence context injected into a @Stateful bean.  An EJB 3 *@Entity* bean is used with the EntityManager to create, persist and merge data to a database.

If you need to use a TRANSACTION persistence context, see [this example|Testing Transactions Example].

_The source for this example is in the "injection-of-entitymanager" directory located in the [openejb-examples.zip|OPENEJB:Download] available on the download page._

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h1. The Code

h2. The Stateful bean
{snippet:id=code|url=openejb3/examples/injection-of-entitymanager/src/main/java/org/superbiz/injection/jpa/MoviesImpl.java|lang=java}

h2. The Entity bean
{snippet:id=code|url=openejb3/examples/injection-of-entitymanager/src/main/java/org/superbiz/injection/jpa/Movie.java|lang=java}

h2. The persistence unit

{snippet:id=code|url=openejb3/examples/injection-of-entitymanager/src/main/resources/META-INF/persistence.xml|lang=xml}

h1. Writing a unit test for the example

{snippet:id=code|url=openejb3/examples/injection-of-entitymanager/src/test/java/org/superbiz/injection/jpa/MoviesTest.java|lang=java}

Curious on the InitialContext parameters used?  See the [Injection of DataSource Example] for an explanation of how any Resource can be configured via properties in the TestCase itself or via an openejb.xml file.

h1.  Running

Running the example is fairly simple.  In the "injection-of-entitymanager" directory of the [examples zip|OPENEJB:Download], just run:

$ mvn clean install

Which should create output like the following.

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-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running org.superbiz.injection.jpa.MoviesTest
Apache OpenEJB 3.0    build: 20080408-04:13
http://openejb.apache.org/
INFO - openejb.home = /Users/dblevins/work/openejb-3.0/examples/injection-of-entitymanager
INFO - openejb.base = /Users/dblevins/work/openejb-3.0/examples/injection-of-entitymanager
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=movieDatabaseUnmanaged, type=Resource, provider-id=Default JDBC Database)
INFO - Configuring Service(id=movieDatabase, type=Resource, provider-id=Default JDBC Database)
INFO - Configuring Service(id=Default JDK 1.3 ProxyFactory, type=ProxyFactory, provider-id=Default JDK 1.3 ProxyFactory)
INFO - Found EjbModule in classpath: /Users/dblevins/work/openejb-3.0/examples/injection-of-entitymanager/target/classes
INFO - Configuring app: /Users/dblevins/work/openejb-3.0/examples/injection-of-entitymanager/target/classes
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 PersistenceUnit(name=movie-unit)
INFO - Loaded Module: /Users/dblevins/work/openejb-3.0/examples/injection-of-entitymanager/target/classes
INFO - Assembling app: /Users/dblevins/work/openejb-3.0/examples/injection-of-entitymanager/target/classes
INFO - PersistenceUnit(name=movie-unit, provider=org.apache.openjpa.persistence.PersistenceProviderImpl)
ERROR - JAVA AGENT NOT INSTALLED. The JPA Persistence Provider requested installation of a ClassFileTransformer which requires
        a JavaAgent.  See http://openejb.apache.org/3.0/javaagent.html
INFO - Jndi(name=MoviesLocal) --> Ejb(deployment-id=Movies)
INFO - Created Ejb(deployment-id=Movies, ejb-name=Movies, container=Default Stateful Container)
INFO - Deployed Application(path=/Users/dblevins/work/openejb-3.0/examples/injection-of-entitymanager/target/classes)
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.095 sec

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
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