修正Java.lang.IllegalStateException:没有找到活跃的对话。在com.rapidclipse.framework.server.jpa.Jpa.getEntityManager(Jpa.java:200)

Question

我有一个正在运行的RapidClipse X项目，在这个项目中我使用一个MySQL数据库。我创建了一个类来将数据从一个表复制到另一个表中。为此，我使用了一个流

        HibKontoDAO().findAll().stream().forEach( tc -> {
        ... copy data
}

此代码的调用和处理在我的应用程序中的任何地方都能很好地工作，除非通过rest服务调用它。

通常，当我通过REST调用它时，我会得到以下错误：

java.lang.IllegalStateException: No active conversation found.
at com.rapidclipse.framework.server.jpa.Jpa.getEntityManager(Jpa.java:200)
at com.rapidclipse.framework.server.jpa.Jpa.getEntityManager(Jpa.java:180)

我所做的:我用来测试purpoase，简单的Hello示例，out：https://www.javaguides.net/2020/01/resteasy-hello-world-example-tutorial.html

我把代码放在我的应用程序中，它也运行得很好！然后我就换了。在HelloWorldResource类中，我调用我的代码(它返回一个文本)

String myUmsMes = this.StartTransfer();
final HlpHelloWorldRest helloWorld = new HlpHelloWorldRest(myUmsMes);

当我运行这个，我得到了流的错误。

HibKontoDAO().findAll().stream().forEach( tc -> {
            ... copy data
    }

完整的堆栈跟踪是：

    Apr. 10, 2022 10:55:09 AM com.rieder.finmgmt.helper.HlpHelloWorldRestResource StartTransfer
    INFO: com.rieder.finmgmt.helper.HlpHelloWorldRestResource Exception happend 

java.lang.IllegalStateException: No active conversation found.
    at com.rapidclipse.framework.server.jpa.Jpa.getEntityManager(Jpa.java:200)
    at com.rapidclipse.framework.server.jpa.Jpa.getEntityManager(Jpa.java:180)
    at com.rapidclipse.framework.server.jpa.dal.JpaDataAccessObject$Default.em(JpaDataAccessObject.java:173)
    at com.rapidclipse.framework.server.jpa.dal.JpaDataAccessObject$Default.findAll(JpaDataAccessObject.java:243)
    at com.rieder.finmgmt.helper.HlpHelloWorldRestResource.StartTransfer(HlpHelloWorldRestResource.java:89)
    at com.rieder.finmgmt.helper.HlpHelloWorldRestResource.helloWorld(HlpHelloWorldRestResource.java:49)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:138)
    at org.jboss.resteasy.core.ResourceMethodInvoker.internalInvokeOnTarget(ResourceMethodInvoker.java:546)
    at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTargetAfterFilter(ResourceMethodInvoker.java:435)
    at org.jboss.resteasy.core.ResourceMethodInvoker.lambda$invokeOnTarget$0(ResourceMethodInvoker.java:396)
    at org.jboss.resteasy.core.interception.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:358)
    at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:398)
    at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:365)
    at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:338)
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:440)
    at org.jboss.resteasy.core.SynchronousDispatcher.lambda$invoke$4(SynchronousDispatcher.java:229)
    at org.jboss.resteasy.core.SynchronousDispatcher.lambda$preprocess$0(SynchronousDispatcher.java:135)
    at org.jboss.resteasy.core.interception.PreMatchContainerRequestContext.filter(PreMatchContainerRequestContext.java:358)
    at org.jboss.resteasy.core.SynchronousDispatcher.preprocess(SynchronousDispatcher.java:138)
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:215)
    at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:245)
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:61)
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:196)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:698)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:364)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:624)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:831)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1673)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
    at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.base/java.lang.Thread.run(Thread.java:832)

如果单独运行，这两种代码都运行良好。我在网上什么也没找到.没有发现活跃的对话..。

知道我做错了什么，原因是什么，或者如何解决这个问题？提前谢谢你！

Answer 1

我玩了很久才找到办法。如果您通过rest调用内置版本的MyEntityDAO.findAll，那么它似乎不起作用。我不得不创建一个自己的会话。因此，我在我的MyEntityDAO中创建了一个小小的代码平静：

public List < MyEntity > getAll() {
    try (Session session =  this in my updateHibernateUtil.getSessionFactory().openSession()) {
        return session.createQuery("from MyEntity", MyEntity.class).list();
    }
}

我必须创建一个HibernateUtil.class，如：https://www.javaguides.net/2021/08/hibernate-example-with-mysql-database.html中所描述的

然后我在我的复制逻辑中引用了它，一切都很好！