Spring DB2 JPA Entity Manager Problem

[gcar]

Hi, I'm trying to configure Spring, JPA and DB2 in order to have the entity manager instance to be used in my spring controllers but according how I have configured Spring this not happens. These are the two attempts of configuration of spring:

<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource" />
<bean name="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="em" />
</bean>
<bean id="em"
class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
<property name="persistenceUnitName" value="fileUtility" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.OpenJpaVendorAdapter">
<property name="database" value="DB2" />
<property name="showSql" value="true" />
</bean>
</property>
</bean>

the second is this:

<!-- Entity manager factory bean. -->
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
<property name="persistenceUnitName" value="Sample" />
</bean>

<!-- Entity manager bean. -->
<bean id="em" factory-bean="entityManagerFactory"
factory-method="createEntityManager" />

and the entity manager is injected in this way:

<bean id="messageService" class="utilities.services.impl.MessageServiceImpl">
<property name="entityManager" ref="em" />
</bean>

but I have always this exception:

Caused by: java.lang.IllegalArgumentException: methods with same signature createEntityManager() but incompatible return types:

http://interface

com.ibm.websphere.persistence.WsJpaEntityManager, interface org.apache.openjpa.persistence.OpenJPAEntityManagerSPI

I don't know how can be fixed. Has anyone encountered this problem?

Thanks in advance.

Also this is my persitence.xml configuration file:

<?xml version="1.0"?>
<persistence xmlns="

http://java.sun.com/xml/ns/persistence"

xmlns:xsi="

http://www.w3.org/2001/XMLSchema-instance"

version="1.0">
<persistence-unit name="fileUtility"
transaction-type="RESOURCE_LOCAL">
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<mapping-file>META-INF/mapping.xml</mapping-file>
<properties>
<property name="openjpa.ConnectionURL" value="jdbc:db2://localhost:50000/db2admin" />
<property name="openjpa.ConnectionDriverName" value="COM.ibm.db2.jdbc.app.DB2Driver" />
<property name="openjpa.ConnectionUserName" value="db2admin" />
<property name="openjpa.ConnectionPassword" value="XXXX" />
<property name="openjpa.FlushBeforeQueries" value="true"/>
<property name="openjpa.RuntimeUnenhancedClasses" value="supported" />
</properties>

</persistence-unit>

<persistence-unit name="fileUtility2" transaction-type="JTA">
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<jta-data-source>file_ds</jta-data-source>
<mapping-file>META-INF/mapping.xml</mapping-file>
<properties>
<property name="openjpa.Log" value="SQL=TRACE"/>
<property name="openjpa.ConnectionFactoryProperties" value="PrettyPrint=true, PrettyPrintLineLength=72"/>
</properties>
</persistence-unit>
</persistence>