Re: [rules-users] Exception using persistence
There is no need to use JTA, unless you have a reason for it. You can use a
RESOURCE_LOCAL (non XA transaction):
PERSISTENCE.XML:
<persistence-unit name="workflow.framework.persistence.unit"
transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
... ... ...
</persistence-unit>
SPRING CONFIG:
<bean id="abstractKnowledgeProvider"
class="org.drools.container.spring.beans.persistence.JPAKnowledgeServiceBean"
abstract="true">
<property name="entityManagerFactory"
ref="entityManagerFactory" />
<property name="transactionManager" ref="txManager"
/>
<property name="variablePersisters">
<util:map>
<entry key="javax.persistence.Entity"
value="org.drools.persistence.processinstance.persisters.JPAVariablePersister"/>
<entry key="java.lang.String"
value="some.other.package.drools.variablepersistence.StringVariablePersister"/>
<entry key="java.io.Serializable"
value="org.drools.persistence.processinstance.persisters.SerializableVariablePersister"/>
</util:map>
</property>
</bean>
<bean id="txManager"
class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory"
ref="entityManagerFactory" />
</bean>
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="persistenceUnitName"
value="your.persistence.unit" />
<property name="dataSource" ref="datasource" />
<property name="jpaProperties">
<props>
<prop
key="hibernate.connection.autocommit">${hibernate.connection.autocommit}</prop>
<prop
key="hibernate.max_fetch_depth">${hibernate.max_fetch_depth}</prop>
<prop
key="hibernate.show_sql">${hibernate.show_sql}</prop>
<prop
key="hibernate.dialect">${hibernate.dialect}</prop>
<prop
key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
</props>
</property>
</bean>
<bean
class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
<bean
class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/>
<drools:connection id="connection1" type="local" />
<drools:execution-node id="node1" connection="connection1"
/>
If the app you are building is any serious, you will of course need some
tx:advices & aop:configs to spice it up, but that is another discussion... (
http://static.springsource.org/spring/docs/3.0.x/spring-framework-referen...
)
/Anatoly
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