OpenJPA - 交易管理不可用......（Fuse ESB）

问题描述：

我在使用Fuse ESB中的JPA的 RESOURCE_LOCAL 交易类型时遇到问题。

I'm having trouble with RESOURCE_LOCAL transaction type for JPA in Fuse ESB.

我也不喜欢完全理解 JTA 或 RESOURCE_LOCAL 对我来说是否更好。

I also don't have a complete understanding of whether JTA or RESOURCE_LOCAL is better for me.

我的persistence.xml：

My persistence.xml :

<persistence-unit name="invoicePersistence" transaction-type="RESOURCE_LOCAL">

    <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
    <jta-data-source>osgi:service/javax.sql.DataSource/(osgi.jndi.service.name=jdbc/invDataSource)</jta-data-source>
    <non-jta-data-source>osgi:service/javax.sql.DataSource/(osgi.jndi.service.name=jdbc/invDataSource)</non-jta-data-source>
    <class>com.company.service.Invoice</class>
    <!-- etc... -->

</persistence-unit>

我在blueprint.xml中的bean：

My beans in blueprint.xml :

<reference id="invDataSource" interface="javax.sql.DataSource" filter="(datasource.name=invDataSource)"/>

<bean id="invoiceDao" class="com.company.project.InvoiceDao">
    <jpa:context unitname="invoicePersistence" property="entityManager"/>
    <tx:transaction method="*" value="Required" />
</bean>

我的代码：

    entityManager.getTransaction().begin();

    entityManager.persist(a);
    entityManager.persist(b);

    entityManager.getTransaction().commit();

例外，使用事务类型 RESOURCE_LOCAL 在我的persistence.xml中：

And the exception, using transaction-type RESOURCE_LOCAL in my persistence.xml:

java.lang.IllegalStateException: Transaction management is not available for container managed EntityManagers.

我也尝试使用交易类型 JTA 在我的persistence.xml中然后我收到 OptimisticLockException 。

I also tried using transaction-type JTA in my persistence.xml but then I received OptimisticLockException.

我不确定哪种方法更好（RESOURCE_LOCAL或JTA）但主要的是在我的代码对象 a 和 b 需要在事务中持久化（全部或全部）。

I'm not sure which approach is better (RESOURCE_LOCAL or JTA) but the main thing is that in my code object a and b need to be persisted in a transaction (all or nothing).

我在Fuse ESB（驼峰，cxf等）中运行。

I'm running in Fuse ESB (camel, cxf, etc).

感谢您的任何提示或帮助。

Thanks for any tips or help.

答

好的，这是答案。

首先， JPA Concepts 和 Aries JPA容器

RESOURCE_LOCAL

transaction-type =RESOURCE_LOCAL确实自我管理持久性，代码应该是这样的：

transaction-type="RESOURCE_LOCAL" is indeed self-managed persistence, and the code should be like this:

EntityManager entityManager = entityManagerFactory.createEntityManager();

...

entityManager.getTransaction().begin();
entityManager.persist(a);
entityManager.persist(b);
entityManager.getTransaction().commit();

使用 entityManager.getTransaction（）和 entityManager.flush（）两者都导致异常，因为我指定了< jpa：context> 。

Using entityManager.getTransaction() and entityManager.flush() both caused exceptions, because I had specified <jpa:context>.

正确的方法是使用< jpa：unit> 和 EntityManagerFactory 。

<bean id="invoiceDao" class="com.company.project.InvoiceDao">
    <jpa:unit unitname="invoicePersistence" property="entityManagerFactory"/>
</bean>

JTA

另一方面 transaction-type =JTA是'容器管理'持久性：

On the other hand transaction-type="JTA" is 'container-managed' persistence:

entityManager.persist(a);
entityManager.persist(b);

它应该用蓝图配置< jpa：context> 和 EntityManager 。

OpenJPA - 交易管理不可用......（Fuse ESB）

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