How to inject @PersistenceContext into pojo class
I'm trying to inject PersistenceContex into POJO using @PersistenceContex annotation, I've read that i need to made that POJO managed to do that. So I inject my POJO class into servlet(so its now managed as dependent object, am i right ?) but when servlet is trying to call metod from injected object i get error:
java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName null
So it looks like PersistenceContext is not injected into POJO properly, what should I do to make it work ?
My POJO class looks like this:
public class FileEntityControlerImpl implements FileEntityInterface {
@PersistenceContext
EntityManager entityManager;
@Override
public void createFile(FileEntity fileEntity) {
...}
@Override
public FileEntity retriveFile(String fileName) {
...}
Injection point:
@Inject
FileEntityInterface fileController;
If I use SLSB and inject using @EJB it works fine.
..::UPDATE::..
stacktrace:
WARNING: StandardWrapperValve[ResourcesServlet]: PWC1406: Servlet.service() for servlet ResourcesServlet threw exception java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName MambaPU at com.sun.enterprise.container.common.impl.EntityManagerWrapper.init(EntityManagerWrapper.java:121) at com.sun.enterprise.container.common.impl.EntityManagerWrapper._getDelegate(EntityManagerWrapper.java:162) at com.sun.enterprise.container.common.impl.EntityManagerWrapper.createNamedQuery(EntityManagerWrapper.java:554) at pl.zawi.mamba.core.integration.controllers.implementation.FileEntityControlerImpl.retriveFile(FileEntityControlerImpl.java:32) at pl.zawi.mamba.core.face.servlets.ResourcesServlet.doGet(ResourcesServlet.java:60) at javax.servlet.http.HttpServlet.service(HttpServlet.java:734) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV开发者_运维知识库alve.java:279) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641) at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97) at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:325) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:226) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:165) at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:791) at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:693) at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:954) at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:170) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88) at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57) at com.sun.grizzly.ContextTask.run(ContextTask.java:69) at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330) at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309) at java.lang.Thread.run(Thread.java:662)
persistance.xml:
<?xml version="1.0" encoding="UTF-8"?>
<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">
<persistence-unit name="MambaPU" transaction-type="JTA">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<jta-data-source>jdbc/MambaDB</jta-data-source>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<shared-cache-mode>ALL</shared-cache-mode>
<properties>
<!-- <property name="javax.persistence.jdbc.password" value="root"/>-->
<!-- <property name="javax.persistence.jdbc.user" value="root"/>-->
<!-- <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>-->
<!-- <property name="eclipselink.ddl-generation" value="create-tables"/>-->
<!-- <property name="eclipselink.logging.logger" value="org.eclipse.persistence.logging.DefaultSessionLog"/>-->
<property name="eclipselink.logging.level" value="ALL"/>
<property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
</properties>
</persistence-unit>
</persistence>
..::UPDATE2::..
If someone is interested there is sorce of my project, I've been using maven so it should be simple to build and run.(MySql drive is not included in pom-s so keep it in mind )
Mamba.Core
Just for the reference:
You don't use the @PersistenceContext annotation at all on Entity classes. Simply including a Persistence Unit with the POJOs will make them managed (adding a persistence.xml and an empty beans.xml into the META-INF folder of the JAR of the POJO classes.
@PersistenceContext is used on Session Beans and its purpose is to automatically inject the EntityManager into the session bean.
- first, your pojo needs to be in a bean archive (have
beans.xml
inMETA-INF
orWEB-INF
) in order to be managed @PersistenceContext
requires aMETA-INF/persistence.xml
, where you define a persistent unit- if there is a persistent unit and it still fails, try
@PersistenceContext(unitName="name")
I have the same issue: Glassfish doesn't bring up EntityManager if DAO is not Stateless
I think that is a Glassfish issue, because works fine under JBoss AS 6.
I have the same issue. My SLSB
injects my DAO
ojbect with @Inject
. The @PersistenceContext
is in the POJO. When the POJO is in the same maven project as the EJB
, everything works fine. Im not sure why, but the EJB
cannot inject the POJO (w/ PU) when it is in a different project, unless I make the POJO a SLSB
and use @EJB
instead of @Inject
.
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