[jboss-user] [Beginner's Corner] - JBoss : persistence and EntityManager injection
zecas zecas
do-not-reply at jboss.com
Wed Oct 13 17:58:44 EDT 2010
zecas zecas [http://community.jboss.org/people/zecas] created the discussion
"JBoss : persistence and EntityManager injection"
To view the discussion, visit: http://community.jboss.org/message/566354#566354
--------------------------------------------------------------
Hi,
I'm starting a small testing project from scratch, but I'm getting some trouble configuring JPA persistence ... I'll post some code fragments and hope someone can enlight me on the issue.
I have an EAR, my-ear, and inside there is a single WAR, my-war. All definitions should be placed correctly, since I can make it to pick all settings, even those defined in "persistence.xml".
my-war structure
C:.
| index.jsp
|
+---META-INF
| MANIFEST.MF
|
\---WEB-INF
| faces-config.xml
| jboss-web.xml
| web.xml
|
+---classes
| +---com
| | \---my
| | \---package
| | SimpleMessage.class
| |
| \---META-INF
| persistence.xml
|
\---lib
web.xml
<web-app ...>
...
<resource-ref>
<description>Datasource Connection</description>
<res-ref-name>jdbc/MyDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
</web-app>
jboss-web.xml
<jboss-web>
<resource-ref>
<res-ref-name>jdbc/MyDB</res-ref-name>
<jndi-name>java:/ds/MyDB</jndi-name>
</resource-ref>
</jboss-web>
persistence.xml
<persistence version="2.0"
xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<persistence-unit name="punit">
<jta-data-source>java:jdbc/MyDB</jta-data-source>
</persistence-unit>
</persistence>
My Java code has the following class:
SimpleMessage.java
package com.my.package;
import javax.persistence.PersistenceContext;
public class SimpleMessage {
@PersistenceContext
private EntityManager em;
@PersistenceUnit(name="punit")
private EntityManagerFactory emf;
public void something() {
if( em!=null ) {
System.out.println("EntityManager Available!");
} else {
System.out.println("EntityManager is NULL!");
}
if( emf!=null ) {
System.out.println("EntityManagerFactory Available!");
} else {
System.out.println("EntityManagerFactory is NULL!");
}
}
}
I intend to test just this ... a simple basic class where I inject the manager instance. The class is not an EJB class, just an basic injected class.
When deploying, I get the following result:
2010-10-13 14:09:55,197 INFO [org.jboss.web.tomcat.service.deployers.TomcatDeployment] (HDScanner) deploy, ctxPath=/my-war
2010-10-13 14:09:55,213 ERROR [org.jboss.web.tomcat.service.deployers.TomcatDeployment] (HDScanner) ENC setup failed
java.lang.NullPointerException
at org.jboss.injection.PersistenceUnitHandler.getManagedEntityManagerFactory(PersistenceUnitHandler.java:149)
at org.jboss.injection.PcEncInjector.inject(PcEncInjector.java:76)
at org.jboss.web.tomcat.service.TomcatInjectionContainer.populateEnc(TomcatInjectionContainer.java:482)
However, if in "persistence.xml" I instead define the datasource reference as "java:ds/MyDB" (datasource name definition on JBoss), I obtain the following result:
2010-10-13 14:15:20,552 INFO [org.jboss.jpa.deployment.PersistenceUnitDeployment] (HDScanner) Starting persistence unit persistence.unit:unitName=my-ear-1.0.0.ear/my-war-1.0.0.war#punit
2010-10-13 14:15:20,552 INFO [org.hibernate.ejb.Ejb3Configuration] (HDScanner) Processing PersistenceUnitInfo [
name: punit
...]
2010-10-13 14:15:20,552 WARN [org.hibernate.ejb.Ejb3Configuration] (HDScanner) Persistence provider caller does not implement the EJB3 spec correctly. PersistenceUnitInfo.getNewTempClassLoader() is null.
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.search.HibernateSearchEventListenerRegister] (HDScanner) Unable to find org.hibernate.search.event.FullTextIndexEventListener on the classpath. Hibernate Search is not enabled.
2010-10-13 14:15:20,568 INFO [org.hibernate.connection.ConnectionProviderFactory] (HDScanner) Initializing connection provider: org.hibernate.ejb.connection.InjectedDataSourceConnectionProvider
2010-10-13 14:15:20,568 INFO [org.hibernate.ejb.connection.InjectedDataSourceConnectionProvider] (HDScanner) Using provided datasource
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) RDBMS: MySQL, version: 5.1.41-3ubuntu12.6
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) JDBC driver: MySQL-AB JDBC Driver, version: mysql-connector-java-5.1.10 ( Revision: ${svn.Revision} )
2010-10-13 14:15:20,568 INFO [org.hibernate.dialect.Dialect] (HDScanner) Using dialect: org.hibernate.dialect.MySQLDialect
2010-10-13 14:15:20,568 INFO [org.hibernate.transaction.TransactionFactoryFactory] (HDScanner) Transaction strategy: org.hibernate.ejb.transaction.JoinableCMTTransactionFactory
2010-10-13 14:15:20,568 INFO [org.hibernate.transaction.TransactionManagerLookupFactory] (HDScanner) instantiating TransactionManagerLookup: org.hibernate.transaction.JBossTransactionManagerLookup
2010-10-13 14:15:20,568 INFO [org.hibernate.transaction.TransactionManagerLookupFactory] (HDScanner) instantiated TransactionManagerLookup
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Automatic flush during beforeCompletion(): disabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Automatic session close at end of transaction: disabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) JDBC batch size: 15
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) JDBC batch updates for versioned data: disabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Scrollable result sets: enabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) JDBC3 getGeneratedKeys(): enabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Connection release mode: auto
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Maximum outer join fetch depth: 2
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Default batch fetch size: 1
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Generate SQL with comments: disabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Order SQL updates by primary key: disabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Order SQL inserts for batching: disabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory
2010-10-13 14:15:20,568 INFO [org.hibernate.hql.ast.ASTQueryTranslatorFactory] (HDScanner) Using ASTQueryTranslatorFactory
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Query language substitutions: {}
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) JPA-QL strict compliance: enabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Second-level cache: enabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Query cache: disabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Cache region factory : org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge
2010-10-13 14:15:20,568 INFO [org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge] (HDScanner) Cache provider: org.hibernate.cache.HashtableCacheProvider
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Optimize cache for minimal puts: disabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Cache region prefix: persistence.unit:unitName=my-ear-1.0.0.ear/my-war-1.0.0.war#punit
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Structured second-level cache entries: disabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Statistics: disabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Deleted entity synthetic identifier rollback: disabled
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Default entity-mode: pojo
2010-10-13 14:15:20,568 INFO [org.hibernate.cfg.SettingsFactory] (HDScanner) Named query checking : enabled
2010-10-13 14:15:20,568 INFO [org.hibernate.impl.SessionFactoryImpl] (HDScanner) building session factory
2010-10-13 14:15:20,568 INFO [org.hibernate.impl.SessionFactoryObjectFactory] (HDScanner) Factory name: persistence.unit:unitName=my-ear-1.0.0.ear/my-war-1.0.0.war#punit
2010-10-13 14:15:20,568 INFO [org.hibernate.util.NamingHelper] (HDScanner) JNDI InitialContext properties:{java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory, java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces}
2010-10-13 14:15:20,584 INFO [org.hibernate.impl.SessionFactoryObjectFactory] (HDScanner) Bound factory to JNDI name: persistence.unit:unitName=my-ear-1.0.0.ear/my-war-1.0.0.war#punit
2010-10-13 14:15:20,584 WARN [org.hibernate.impl.SessionFactoryObjectFactory] (HDScanner) InitialContext did not implement EventContext
2010-10-13 14:15:20,584 INFO [org.hibernate.util.NamingHelper] (HDScanner) JNDI InitialContext properties:{java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory, java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces}
2010-10-13 14:15:20,724 INFO [org.jboss.web.tomcat.service.deployers.TomcatDeployment] (HDScanner) deploy, ctxPath=/my-war
2010-10-13 14:15:20,755 INFO [javax.enterprise.resource.webcontainer.jsf.config] (HDScanner) Initializing Mojarra (1.2_12-b01-FCS) for context '/my-war'
2010-10-13 14:15:20,896 ERROR [STDERR] (HDScanner) SLF4J: Class path contains multiple SLF4J bindings.
2010-10-13 14:15:20,896 ERROR [STDERR] (HDScanner) SLF4J: Found binding in [vfszip:/C:/Program Files/Java/jboss-5.1.0.GA/common/lib/slf4j-jboss-logging.jar/org/slf4j/impl/StaticLoggerBinder.class]
2010-10-13 14:15:20,896 ERROR [STDERR] (HDScanner) SLF4J: Found binding in [vfszip:/C:/Program Files/Java/jboss-5.1.0.GA/server/default/deploy/my-ear-1.0.0.ear/logback-classic-0.9.20.jar/org/slf4j/impl/StaticLoggerBinder.class]
2010-10-13 14:15:20,912 ERROR [STDERR] (HDScanner) SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
So my questions are:
*1#* After invoking "SimpleMessage.something();" (using the second option "java:ds/MyDB" in "persistence.xml") I receive the following output:
EntityManager is NULL!
EntityManagerFactory is NULL!
So no injection happened ... shouldn't it occur? what happened?
*2#* I was assuming that "web.xml" defines the JNDI to be used inside my webapp, then "jboss-web.xml" would map that name into the internall JNDI defined in JBoss.
In this case for JBoss usage, if changing to IBM WebSphere I would use another mapping config file.
BUT ... I was also assuming that "persistence.xml" would define the JNDI that is defined in "web.xml" ... and not the one defined in application server level ... so I would get an abstraction from whichever server I'll deploy my project into.
Shouldn't this be working like that? What am I doing wrong?
Any help would be appreciated ... I really need to understand and put this to work ...
Thanks.
--------------------------------------------------------------
Reply to this message by going to Community
[http://community.jboss.org/message/566354#566354]
Start a new discussion in Beginner's Corner at Community
[http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2075]
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/jboss-user/attachments/20101013/5d0e34a1/attachment-0001.html
More information about the jboss-user
mailing list