4:58 p.m.
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
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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.
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