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我有一个 Seam 3 视图范围的有状态 EJ bean，它在 JSF 页面中使用（您可以在第一次阅读时跳过代码）：

@Named
@ViewScoped
@Stateful
@TransactionAttribute( TransactionAttributeType.SUPPORTS )
@LocalBean
public class CollisionManager implements ActionListener, Serializable
{
    ...

    @Inject
    private CollisionService          collisionService;

    // selected collisions (must be an array, call 911-PRIMEFACES)
    private Collision[]               selectedCollisionsArray;
    private List<Collision>           selectedCollisions;


    public Collision getSelectedCollision()
    {
        if ( this.selectedCollisionsArray == null || this.selectedCollisionsArray.length == 0 )
        {
            return null;
        }

        return this.selectedCollisionsArray[0];
    }

    public void setSelectedCollision( Collision selectedCollision )
    {
        this.selectedCollisionsArray = new Collision[1];
        this.selectedCollisionsArray[0] = selectedCollision;
    }

    /**
     * Called by <f:actionListener>
     *
     * This throws an exception:
     * java.lang.IllegalStateException: Transaction is not active in the current thread.
     *    ...
     */
    @Override
    public void processAction( ActionEvent event )
    {
        this.log.infov( "Calling single-selection CLASS NAME action listener for {0}", this.selectedCollisionsArray[0] );

        reloadSelectedCollisions();
    }

    /**
     * Called by <f:setPropertyActionListener>
     *
     * This throws no exception.
     */
    public void setReloadCollision( @SuppressWarnings( "unused" ) Collision selectedCollision )
    {
        this.log.infov( "Calling single-selection PROPERTY action listener for {0}", this.selectedCollisionsArray[0] );

        reloadSelectedCollisions();
    }

    public void reloadSelectedCollisions()
    {
        this.selectedCollisions = ...; // reload list for at least one selected collision
    }

    public void setSelectedStateChangeCollision( Collision selectedStateChangeCollision )
    {
        this.selectedStateChangeCollision = selectedStateChangeCollision;
    }
}

我们有一个项目列表（碰撞），其中可以通过复选框选择多个项目。每个项目都有一个专用按钮来编辑单个碰撞。

在此处输入图像描述

这是顶部的多选 JSF 命令按钮：

<p:commandButton icon="ui-icon ui-icon-flag"
                 value="Change state"
                 disabled="#{empty collisionManager.selectedCollisionsArray}"
                 actionListener="#{collisionManager.reloadSelectedCollisions}"
                 process="@this"
                 update=":state-change-dialog"
                 oncomplete="stateChangeDialog.show();">
<f:setPropertyActionListener target="#{collisionManager.selectedStateChangeCollision}" value="#{collisionManager.selectedCollisions[0]}" />
</p:commandButton>

这个按钮没有问题。

由于用户在调用对话框之前已经选择了项目，因此在按下此按钮（显示编辑对话框）时，多选元素是已知的。

对于列中的单选按钮，我首先使用了以下非常相似的命令按钮：

<p:commandButton icon="ui-icon ui-icon-flag"
                 actionListener="#{collisionManager.reloadSelectedCollisions}"
                 process="@this"
                 update=":state-change-dialog :collision-form:list"
                 oncomplete="stateChangeDialog.show();">
    <f:setPropertyActionListener target="#{collisionManager.selectedCollision}" value="#{cln}" />
    <f:setPropertyActionListener target="#{collisionManager.selectedStateChangeCollision}" value="#{cln}" />
</p:commandButton>

这当然会失败，因为在collisionManager.reloadSelectedCollisions()通过<f:setPropertyActionListener.

然后我删除了命令按钮actionListener属性并尝试了一个“类名”动作监听器来解决排序问题：

<p:commandButton icon="ui-icon ui-icon-flag"
                 process="@this"
                 update=":state-change-dialog :collision-form:list"
                 oncomplete="stateChangeDialog.show();">
    <f:setPropertyActionListener target="#{collisionManager.selectedCollision}" value="#{cln}" />
    <f:actionListener type="de.company.project.CollisionManager" />
    <f:setPropertyActionListener target="#{collisionManager.selectedStateChangeCollision}" value="#{cln}" />
</p:commandButton>

为了使该processAction( ActionEvent event )方法起作用，我必须将接口添加到CollisionManagerbean 并使用@LocalBean. 您可以看到上面发布的最终课程。

但是，这会引发异常：

java.lang.IllegalStateException: Transaction is not active in the current thread.
    at com.sun.enterprise.transaction.jts.JavaEETransactionManagerJTSDelegate.validateTransactionManager(JavaEETransactionManagerJTSDelegate.java:447)
    at com.sun.enterprise.transaction.jts.JavaEETransactionManagerJTSDelegate.setRollbackOnlyDistributedTransaction(JavaEETransactionManagerJTSDelegate.java:344)
    at com.sun.enterprise.transaction.JavaEETransactionManagerSimplified.setRollbackOnly(JavaEETransactionManagerSimplified.java:971)
    at com.sun.enterprise.transaction.UserTransactionImpl.setRollbackOnly(UserTransactionImpl.java:257)
    at org.jboss.seam.transaction.UTTransaction.setRollbackOnly(UTTransaction.java:82)
    at org.jboss.seam.transaction.DefaultSeamTransaction.setRollbackOnly(DefaultSeamTransaction.java:104)
    at org.jboss.seam.faces.transaction.UnexpectedExceptionObserver.processEvent(UnexpectedExceptionObserver.java:48)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.jboss.weld.util.reflection.SecureReflections$13.work(SecureReflections.java:267)
    at org.jboss.weld.util.reflection.SecureReflectionAccess.run(SecureReflectionAccess.java:52)
    at org.jboss.weld.util.reflection.SecureReflectionAccess.runAsInvocation(SecureReflectionAccess.java:137)
    at org.jboss.weld.util.reflection.SecureReflections.invoke(SecureReflections.java:263)
    at org.jboss.weld.introspector.jlr.WeldMethodImpl.invokeOnInstance(WeldMethodImpl.java:170)
    at org.jboss.weld.introspector.ForwardingWeldMethod.invokeOnInstance(ForwardingWeldMethod.java:51)
    at org.jboss.weld.injection.MethodInjectionPoint.invokeOnInstanceWithSpecialValue(MethodInjectionPoint.java:154)
    at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:245)
    at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:233)
    at org.jboss.weld.event.ObserverMethodImpl.notify(ObserverMethodImpl.java:213)
    at org.jboss.weld.manager.BeanManagerImpl.notifyObservers(BeanManagerImpl.java:590)
    at org.jboss.weld.manager.BeanManagerImpl.fireEvent(BeanManagerImpl.java:580)
    at org.jboss.weld.manager.BeanManagerImpl.fireEvent(BeanManagerImpl.java:575)
    at org.jboss.seam.faces.event.SystemEventBridge.processEvent(SystemEventBridge.java:69)
    at org.jboss.seam.faces.event.DelegatingSystemEventListener.processEvent(DelegatingSystemEventListener.java:51)
    at javax.faces.event.SystemEvent.processListener(SystemEvent.java:106)
    at com.sun.faces.application.ApplicationImpl.processListeners(ApplicationImpl.java:2168)
    at com.sun.faces.application.ApplicationImpl.invokeListenersFor(ApplicationImpl.java:2144)
    at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:302)
    at com.sun.faces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:246)
    at javax.faces.application.ApplicationWrapper.publishEvent(ApplicationWrapper.java:670)
    at javax.faces.application.ApplicationWrapper.publishEvent(ApplicationWrapper.java:670)
    at org.jboss.seam.faces.environment.SeamApplicationWrapper$Proxy$_$$_WeldClientProxy.publishEvent(SeamApplicationWrapper$Proxy$_$$_WeldClientProxy.java)
    at com.sun.faces.lifecycle.Phase.queueException(Phase.java:160)
    at com.sun.faces.lifecycle.Phase.queueException(Phase.java:149)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:104)
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
    at de.company.project.filter.encoding.EncodingFilter.doFilter(EncodingFilter.java:62)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
    at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:126)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
    at org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:65)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
    at org.jboss.solder.servlet.event.ServletEventBridgeFilter.doFilter(ServletEventBridgeFilter.java:74)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
    at de.company.project.filter.security.LoginFilter.doFilter(LoginFilter.java:96)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
    at java.lang.Thread.run(Thread.java:722)

作为一个补丁，我尝试了一个<f:setPropertyActionListener>，传递当前列表实体：

<p:commandButton icon="ui-icon ui-icon-flag"
                 process="@this"
                 update=":state-change-dialog :collision-form:list"
                 oncomplete="stateChangeDialog.show();">
    <f:setPropertyActionListener target="#{collisionManager.selectedCollision}" value="#{cln}" />
    <f:setPropertyActionListener target="#{collisionManager.reloadCollision}" value="#{cln}" />
    <f:setPropertyActionListener target="#{collisionManager.selectedStateChangeCollision}" value="#{cln}" />
</p:commandButton>

此 OTOH 不会引发异常。这真的让我想知道...

问：

为什么这适用于<f:setPropertyActionListener>（调用方法setReloadCollision( Collision selectedCollision )），但它与<f:actionListener />（调用方法processAction( ActionEvent event )）失败？

请注意，我尝试了两种侦听器方法的所有变体都没有成功@TransactionAttribute( TransactionAttributeType.REQUIRED )。@TransactionAttribute( TransactionAttributeType.REQUIRES_NEW )

高度赞赏帮助。

附录：

  1. 谁应该知道这个？
  2. “普通”Java EE 开发人员应该知道什么？
  3. 这些信息隐藏在哪里？

谢谢

4

1 回答 1

0

我认为还有另一个异常导致了这个问题，但不知何故它被吞没了。查看堆栈跟踪，我会尝试在

org.jboss.seam.faces.transaction.UnexpectedExceptionObserver.processEvent(UnexpectedExceptionObserver.java:48)

看看那里发生了什么。在调用 UnexpectedExceptionObserver.processEvent 之后，Seam 将事务设置为 rollbackOnly，就像在异常之后一样，例如 NullPoInterException。

于 2012-09-27T16:11:35.430 回答