Hi Tim,
If you're using Spring with EclipseLink you must copy
spring-tomcat-weaver.jar into $CATALINA_HOME/server/lib see the
Spring
Manual for details. Tomcat absolutely will not support dynamic
weaving
in
Spring (or anything else for that matter) unless you use a
technique like
this. You didn't mention you did this so don't think you did.
Once you
have this in place and you've setup your Spring config properly,
Spring
will
do @PersistenceContext injection. Take a look at the TopLink
Essentials
JPA
version of the Spring PetClinic for an example.
Shaun
Tim Hollosy wrote:
So no luck em.isOpen returns true.
I can't get my friggin AspectJ Weaver to output anything even
though I
have an aop.xml like this:
<!DOCTYPE aspectj PUBLIC
"-//AspectJ//DTD//EN" "http://www.eclipse.org/aspectj/dtd/aspectj.dtd
">
<aspectj>
<weaver options="-debug -verbose -showWeaveInfo
-
XmessageHandlerClass:org
.springframework.aop.aspectj.AspectJWeaverMessageHandler">
<include within="com.redacted.*"/>
</weaver>
<aspects>
<aspect
name
=
"org
.springframework.transaction.aspectj.AnnotationTransactionAspect"/>
</aspects>
</aspectj>
BUT, doing some more reading about weaving I see: at
http://wiki.eclipse.org/EclipseLink/Examples/JPA/Tomcat_Web_Tutorial#Limitations_to_JPA
As Tomcat is not a JEE5 compatible server, there are some
limitiations to
JPA.
* No dynamic weaving (instrumentation) - static weaving of
entities is still available via EclipseLink
* No @EJB injection of a session bean (containing the
EntityManager) is available - use the persistence factory and
manager
directly
* No @PersistenceContext injection of a container managed
persistence unit is available - use
Persistence.createEntityManagerFactory(JTA_PU_NAME)
Does that mean i can't use the @PersistenceContext annotation with
EclipseLink in Tomcat 6???
I'm confused as to weather Tomcat 6 supports LTW or not, since
there
are instructions all over for getting it to weave with Spring...
I may set up an OC4J Instance and see if I have better luck, but
right
now I'm confused as all get out.
./tch
On Fri, Sep 26, 2008 at 6:58 AM, Tim Hollosy <hollosyt@xxxxxxxxx>
wrote:
Mohsen,
I didn't actually call isOpen, I instead inspected it with the
debugger, and noticed the isOpen boolean was true. I'll try your
obvious suggestion when I get in to the office this morning.
My hunch is something odd is going on with weaving, so I'm going to
put some weaving logging in as well.
I guess this is just growing pains and it doesn't always help
when I
choose bleeding edge -- pure annotations & eclipselink for my first
foray into Spring -- but I just can't stand XML, so I've made my
bed
:)
Thanks
./tch
On Fri, Sep 26, 2008 at 6:54 AM, Mohsen Saboorian <mohsens@xxxxxxxxx
>
wrote:
I didn't test it with EclipseLink, but with Hibernate session is
closed after transaction is committed, and it produces a lot of
frustrations with lazy loading, since you usually need to fetch a
list
after a transaction is committed.
Spring provides a OpenSessionInViewFilter to work around this. It
keeps session open durig a request life-cycle.
How did you verified that EM is open? EM.isOpen()?
Mohsen.
On Thu, Sep 25, 2008 at 9:58 PM, Tim Hollosy <hollosyt@xxxxxxxxx>
wrote:
I'm hoping some Spring gurus can help me out, whenever I try to
execute a query I get the error: Attempting to execute an
operation on
a closed EntityManager.
I'm using Spring 2.5 + Tomcat6.
The weird thing is find's work fine. I'm launching tomcat with the
spring-aspects.jar for weaving. I'm new to this whole spring web
stuff
so I am probably missing something, but the only thing I could find
online was to make sure I have the @Transactional annotations used
everywhere in my DAO class, which I do.
If I run in the debugger it looks like the EM is open as well, so
I'm
kind of stumped. I suspect some weaving shenanigans, but I'm too
much
of a neophyte at this right now to debug much more.
Many thanks :)
Here's my config:
applicationcontext.xml;
<context:component-scan base-package="com.redacted" />
<tx:annotation-driven mode="aspectj"/>
<bean id="transactionManager"
class="org.springframework.orm.jpa.JpaTransactionManager"
p:entityManagerFactory-ref="entityManagerFactory"/>
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"
value="oracle.jdbc.OracleDriver" />
<property name="url"
value="jdbc:oracle:thin:@redacted:1521:redacted" />
<property name="username" value="redacted" />
<property name="password" value="redacted" />
</bean>
<bean id="jpaAdapter"
class
="org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter">
<property name="databasePlatform"
value
="org.eclipse.persistence.platform.database.oracle.OraclePlatform"
/>
<property name="showSql" value="true" />
</bean>
<bean id="loadTimeWeaver"
class
=
"org
.springframework
.instrument.classloading.InstrumentationLoadTimeWeaver"/>
<bean id="entityManagerFactory"
class
=
"org
.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName" value="ProofOConcept"/>
<property name="dataSource" ref="dataSource"/>
<property name="jpaVendorAdapter" ref="jpaAdapter"/>
<property name="loadTimeWeaver" ref="loadTimeWeaver"/>
</bean>
<util:list id="annotatedClasses">
<value>com.redacted.*</value>
</util:list>
Here's my DAO class:
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;
import org.eclipse.persistence.jpa.JpaEntityManager;
import org.eclipse.persistence.jpa.JpaHelper;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
@Transactional
@Repository
public class BasicDao {
@PersistenceContext(unitName = "ProofOConcept")
private EntityManager em;
@Transactional(readOnly = true)
public <T> T find(Class<T> entityClass, Object primaryKey) {
T result = em.find(entityClass, primaryKey);
return result;
}
@Transactional(readOnly = true)
public <T> List<T> selectAll(Class<T> clazz) {
JpaEntityManager jpaEm =
JpaHelper.getEntityManager(em);
Query query = jpaEm.createQuery(null, clazz);
return (List<T>) query.getResultList();
}
}
./tch
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--
Shaun Smith | Principal Product Manager, TopLink | +1.905.502.3094
Oracle Fusion Middleware
110 Matheson Boulevard West, Suite 100
Mississauga, Ontario, Canada L5R 3P4
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