Hi all,
I am using openjpa and aries blueprint(last deployed SNAPSHOT) on latest
Karaf SNAPSHOT.
I have a bundle offering a persistence service to my other bundles.
My blueprint configuration is the following:
<bean id="connectorJPA"
class="org.openengsb.persistence.connector.jpabackend.ConnectorJPAPersistenceBackendService">
<tx:transaction method="*" value="Required" />
<jpa:context property="entityManager" unitname="openengsb-connector" />
</bean>
<service
interface="org.openengsb.core.api.persistence.ConfigPersistenceBackendService">
<service-properties>
<entry key="backend.id" value="connector-jpa-persistence" />
</service-properties>
<ref component-id="connectorJPA" />
</service>
part of the persistence.xml
<persistence-unit name="openengsb-connector" transaction-type="JTA">
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
<jta-data-source>osgi:service/javax.sql.DataSource/(osgi.jndi.service.name=jdbc/openengsb)</jta-data-source>
My problem is that I have to put the calls to the entityManager into
synchronized(entityManager){} blocks, because the service can get called
multiple times at once, leading to synchronisation errors in the
entityManager since it is not thread safe.
Is there an equivalent to Spring's SharedEntityManagerImpl or any better
solution than synchronise manually?
kind regards,
Lukas Stampf
