I used to have all my DAOs extend the JdoDaoSupport
class which is now deprecated in Spring 3.1. I've made my own AbstractJdoDao
class which wraps the PersistenceManagerFactory
and all the DAOs extend from there. Is that the way I should be doing?
Also in the documentation on JDO, it seems that the direct instantiation of PersistenceManagerFactory
is not the default option, but to use LocalPersistenceManagerFactoryBean
wrapped in a TransactionAwarePersistenceManagerFactoryProxy
. How to properly instantiate these beans and make them work with the Spring's @Transactional
annotations.
Here's the persistence-related part of my application context:
<bean id="persistenceManagerFactoryProxy" class="org.springframework.orm.jdo.TransactionAwarePersistenceManagerFactoryProxy">
<property name="targetPersistenceManagerFactory">
<bean class="org.springframework.orm.jdo.LocalPersistenceManagerFactoryBean">
<property name="jdoPropertyMap">
<props>
<prop key="javax.jdo.PersistenceManagerFactoryClass">org.datanucleus.store.appengine.jdo.DatastoreJDOPersistenceManagerFactory</prop>
<prop key="javax.jdo.option.ConnectionURL">appengine</prop>
<prop key="javax.jdo.option.NontransactionalRead">true</prop>
<prop key="javax.jdo.option.NontransactionalWrite">false</prop>
<prop key="javax.jdo.option.RetainValues">false</prop>
<prop key="javax.jdo.option.DetachAllOnCommit">true</prop>
<prop key="javax.jdo.option.Multithreaded">true</prop>
<prop key="datanucleus.appengine.ignorableMetaDataBehavior">NONE</prop>
</props>
</property>
</bean>
</property>
<property name="allowCreate" value="false" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="transactionManager" class="org.springframework.orm.jdo.JdoTransactionManager">
<property name="persistenceManagerFactory" ref="persistenceManagerFactoryProxy" />
</bean>
Now when I load a page accessing the data store:
org.springframework.transaction.CannotCreateTransactionException: Could not open JDO PersistenceManager for transaction; nested exception is java.lang.IllegalStateException: No JDO PersistenceManager bound to thread, and configuration does not allow creation of non-transactional one here
at org.springframework.orm.jdo.JdoTransactionManager.doBegin(JdoTransactionManager.java:369) ~[spring-orm-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:371) ~[spring-tx-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:335) ~[spring-tx-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:105) ~[spring-tx-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) ~[spring-aop-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) ~[spring-aop-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at $Proxy15.queryAll(Unknown Source) ~[na:na]
...
Caused by: java.lang.IllegalStateException: No JDO PersistenceManager bound to thread, and configuration does not allow creation of non-transactional one here
at org.springframework.orm.jdo.PersistenceManagerFactoryUtils.doGetPersistenceManager(PersistenceManagerFactoryUtils.java:153) ~[spring-orm-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at org.springframework.orm.jdo.TransactionAwarePersistenceManagerFactoryProxy$PersistenceManagerFactoryInvocationHandler.invoke(TransactionAwarePersistenceManagerFactoryProxy.java:159) ~[spring-orm-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at $Proxy13.getPersistenceManager(Unknown Source) ~[na:na]
at org.springframework.orm.jdo.JdoTransactionManager.doBegin(JdoTransactionManager.java:308) ~[spring-orm-3.1.0.RELEASE.jar:3.1.0.RELEASE]
... 73 common frames omitted
I've got my example project on GitHub. It's using Google App Engine, so either run it via mvn gae:run
in Eclipse (with the Google Plugin for Eclipse), first creating an Eclipse project via mvn eclipse:eclipse
.
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