在javaee中集成多个持久化单元(xa和非xa)

Question

我的persistence.xml中有两个持久化单元，一个是XA，另一个是非xa(当工作只与单个数据源相关并且我不需要全局事务时，可以提高性能)。

<persistence-unit name="pu-negin88" transaction-type="JTA">
    <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
    <jta-data-source>jdbc/glDS</jta-data-source>
    <non-jta-data-source>jdbc/glDS</non-jta-data-source>
</persistence-unit>

<persistence-unit name="pu-nonxa" transaction-type="JTA">
    <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
    <jta-data-source>jdbc/bancononxaDS</jta-data-source>
</persistence-unit>

我将XA持久化单元加载的对象传递给无状态会话bean中的方法，该会话bean使用非xa持久化单元并需要一个新事务。在这个会话bean中，我使用这个对象的一些属性从DD加载其他对象，此时，我得到了以下异常：

javax.ejb.AccessLocalException: Client not authorized for this invocation.
        at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer.java:1218)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:195)
        at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:83)
        at $Proxy604.expireUserSession1(Unknown Source)
        at com.kishware.core.framework.controller.AuthenticationController.control(AuthenticationController.java:60)
        at com.kishware.core.framework.interceptors.TosanBusinessMethodInterceptor._intercept(TosanBusinessMethodInterceptor.java:339)
        at com.kishware.core.framework.interceptors.TosanBusinessMethodInterceptor.intercept(TosanBusinessMethodInterceptor.java:190)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:579)
        at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:483)
        at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:205)
        at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:3978)
        at com.sun.ejb.containers.WebServiceInvocationHandler.invoke(WebServiceInvocationHandler.java:189)
        at $Proxy395.deposit(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.enterprise.webservice.InvokerImpl.invoke(InvokerImpl.java:81)
        at com.sun.enterprise.webservice.EjbInvokerImpl.invoke(EjbInvokerImpl.java:82)
        at com.sun.xml.ws.server.InvokerTube$2.invoke(InvokerTube.java:146)
        at com.sun.xml.ws.server.sei.EndpointMethodHandler.invoke(EndpointMethodHandler.java:257)
        at com.sun.xml.ws.server.sei.SEIInvokerTube.processRequest(SEIInvokerTube.java:93)
        at com.sun.xml.ws.api.pipe.Fiber.__doRun(Fiber.java:595)
        at com.sun.xml.ws.api.pipe.Fiber._doRun(Fiber.java:554)
        at com.sun.xml.ws.api.pipe.Fiber.doRun(Fiber.java:539)
        at com.sun.xml.ws.api.pipe.Fiber.runSync(Fiber.java:436)
        at com.sun.xml.ws.api.pipe.helper.AbstractTubeImpl.process(AbstractTubeImpl.java:106)
        at com.sun.enterprise.webservice.MonitoringPipe.process(MonitoringPipe.java:147)
        at com.sun.xml.ws.api.pipe.helper.PipeAdapter.processRequest(PipeAdapter.java:115)
        at com.sun.xml.ws.api.pipe.Fiber.__doRun(Fiber.java:595)
        at com.sun.xml.ws.api.pipe.Fiber._doRun(Fiber.java:554)
        at com.sun.xml.ws.api.pipe.Fiber.doRun(Fiber.java:539)
        at com.sun.xml.ws.api.pipe.Fiber.runSync(Fiber.java:436)
        at com.sun.xml.ws.api.pipe.helper.AbstractTubeImpl.process(AbstractTubeImpl.java:106)
        at com.sun.xml.ws.tx.service.TxServerPipe.process(TxServerPipe.java:317)
        at com.sun.enterprise.webservice.CommonServerSecurityPipe.processRequest(CommonServerSecurityPipe.java:218)
        at com.sun.enterprise.webservice.CommonServerSecurityPipe.process(CommonServerSecurityPipe.java:129)
        at com.sun.xml.ws.api.pipe.helper.PipeAdapter.processRequest(PipeAdapter.java:115)
        at com.sun.xml.ws.api.pipe.Fiber.__doRun(Fiber.java:595)
        at com.sun.xml.ws.api.pipe.Fiber._doRun(Fiber.java:554)
        at com.sun.xml.ws.api.pipe.Fiber.doRun(Fiber.java:539)
        at com.sun.xml.ws.api.pipe.Fiber.runSync(Fiber.java:436)
        at com.sun.xml.ws.server.WSEndpointImpl$2.process(WSEndpointImpl.java:243)
        at com.sun.xml.ws.transport.http.HttpAdapter$HttpToolkit.handle(HttpAdapter.java:444)
        at com.sun.xml.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:244)
        at com.sun.xml.ws.transport.http.servlet.ServletAdapter.handle(ServletAdapter.java:135)
        at com.sun.enterprise.webservice.Ejb3MessageDispatcher.handlePost(Ejb3MessageDispatcher.java:113)
        at com.sun.enterprise.webservice.Ejb3MessageDispatcher.invoke(Ejb3MessageDispatcher.java:87)
        at com.sun.enterprise.webservice.EjbWebServiceServlet.dispatchToEjbEndpoint(EjbWebServiceServlet.java:226)
        at com.sun.enterprise.webservice.EjbWebServiceServlet.service(EjbWebServiceServlet.java:155)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
        at com.sun.enterprise.web.AdHocContextValve.invoke(AdHocContextValve.java:114)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
        at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:87)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:206)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:150)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
        at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:272)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:719)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:684)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:561)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:666)
        at java.lang.Thread.run(Thread.java:662)

Answer 1

(当工作只与单一数据源相关，并且我不需要全局事务时，可以提高性能)。

首先，您是否真的测量到这会提高性能？一般来说，当一个事务中只有一个事务资源参与时，事务提供者会自动进行优化。

作为实际的异常，也许您应该显示您实际使用的代码。我想知道用于通过XA持久化单元加载实体的事务是否已经结束。

如果事务已经结束，你的实体将被分离，没有人会再记得它最初来自哪里。由于您所说的另一个无状态会话bean需要一个新事务，因此您有一种嵌套事务形式，如果延迟加载实体的属性，则可能会出现问题。

通常，AccessLocalException实际上更多地表示安全问题，例如，当两个bean位于不同的安全领域和/或在它们上定义了安全主体(调用者)没有的@RolesAllowed时。

Answer 2

我修复了这个问题，现在我没有这个例外。这是因为第一个持久化单元加载的对象在第二个持久化单元中是非托管的，当我想使用该对象时，抛出了这个异常。我使用了getReference()方法，从主对象创建了一个空对象并完成了我的工作。