1 2 Previous Next 20 Replies Latest reply on Nov 13, 2009 5:45 PM by Andy Gibson

    ConversationScope not working

    Matt Corey Newbie

      I'm trying to create a simple ConversationScope example using Weld on Glassfish build 70, which I believe uses the Weld 1.0.0 CR1 SP1 OSGI bundle, and a very simple example is giving me a NoClassDefFoundException on javassist.util.proxy.ProxyObject... I have made no modifications of the server, and the code is quite simple, as you can see:

      public class EditUserFacade implements Serializable {
          private Conversation conversation;
          private transient UserRepository repository;
          private long userId;
          private User user;
          public void loadUser() {
              user = repository.get(userId);
          public String editUser() {
              return "viewUser?userId="+userId+"&faces-redirect=true";

      The full stack trace is:

      java.lang.RuntimeException: by java.lang.NoClassDefFoundError: javassist/util/proxy/ProxyObject
           at javassist.util.proxy.ProxyFactory.createClass3(ProxyFactory.java:344)
           at javassist.util.proxy.ProxyFactory.createClass2(ProxyFactory.java:314)
           at javassist.util.proxy.ProxyFactory.createClass(ProxyFactory.java:273)
           at org.jboss.weld.bean.proxy.ClientProxyProvider.createClientProxy(ClientProxyProvider.java:84)
           at org.jboss.weld.bean.proxy.ClientProxyProvider.access$000(ClientProxyProvider.java:41)
           at org.jboss.weld.bean.proxy.ClientProxyProvider$1.call(ClientProxyProvider.java:122)
           at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
           at java.util.concurrent.FutureTask.run(FutureTask.java:138)
           at org.jboss.weld.util.collections.ConcurrentCache.putIfAbsent(ConcurrentCache.java:125)
           at org.jboss.weld.bean.proxy.ClientProxyProvider.getClientProxy(ClientProxyProvider.java:112)
           at org.jboss.weld.BeanManagerImpl.getReference(BeanManagerImpl.java:890)
           at org.jboss.weld.BeanManagerImpl.getReference(BeanManagerImpl.java:910)
           at org.jboss.weld.bean.builtin.facade.InstanceImpl.get(InstanceImpl.java:68)
           at org.jboss.weld.bean.builtin.facade.InstanceImpl.get(InstanceImpl.java:74)
           at org.jboss.weld.conversation.ServletConversationManager.getBeanStore(ServletConversationManager.java:60)
           at org.jboss.weld.conversation.AbstractConversationManager.cleanupConversation(AbstractConversationManager.java:150)
           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 org.jboss.weld.bean.proxy.ClientProxyMethodHandler.invoke(ClientProxyMethodHandler.java:111)
           at org.jboss.weld.conversation.ServletConversationManager_$$_javassist_13.cleanupConversation(ServletConversationManager_$$_javassist_13.java)
           at org.jboss.weld.jsf.WeldPhaseListener.afterRenderResponse(WeldPhaseListener.java:128)
           at org.jboss.weld.jsf.WeldPhaseListener.afterPhase(WeldPhaseListener.java:99)
           at com.sun.faces.lifecycle.Phase.handleAfterPhase(Phase.java:189)
           at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:107)
           at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
           at javax.faces.webapp.FacesServlet.service(FacesServlet.java:311)
           at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1523)
           at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
           at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:188)
           at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:641)
           at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:97)
           at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:85)
           at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:185)
           at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:332)
           at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:233)
           at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:161)
           at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:789)
           at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:697)
           at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:952)
           at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:166)
           at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:135)
           at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:102)
           at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:88)
           at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:76)
           at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:53)
           at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:57)
           at com.sun.grizzly.ContextTask.run(ContextTask.java:69)
           at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:330)
           at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:309)
           at java.lang.Thread.run(Thread.java:619)
      Caused by: javassist.CannotCompileException: by java.lang.NoClassDefFoundError: javassist/util/proxy/ProxyObject
           at javassist.util.proxy.FactoryHelper.toClass(FactoryHelper.java:169)
           at javassist.util.proxy.ProxyFactory.createClass3(ProxyFactory.java:339)
           ... 51 more
      Caused by: java.lang.NoClassDefFoundError: javassist/util/proxy/ProxyObject
           at java.lang.ClassLoader.defineClass1(Native Method)
           at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
           at sun.reflect.GeneratedMethodAccessor60.invoke(Unknown Source)
           at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
           at java.lang.reflect.Method.invoke(Method.java:597)
           at javassist.util.proxy.FactoryHelper.toClass2(FactoryHelper.java:181)
           at javassist.util.proxy.FactoryHelper.toClass(FactoryHelper.java:163)
           ... 52 more
      Caused by: java.lang.ClassNotFoundException: javassist.util.proxy.ProxyObject
           at org.apache.felix.framework.ModuleImpl.findClassOrResourceByDelegation(ModuleImpl.java:738)
           at org.apache.felix.framework.ModuleImpl.access$100(ModuleImpl.java:60)
           at org.apache.felix.framework.ModuleImpl$ModuleClassLoader.loadClass(ModuleImpl.java:1650)
           at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
           at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
           ... 59 more

      ConversationScopes are a big win over plain JSF, and something I'd like to see in action -- any hints!?


        • 1. Re: ConversationScope not working
          Nicklas Karlsson Master

          Sounds like the javassist classloader problem mentioned before in this forum.

          • 2. Re: ConversationScope not working
            Pete Muir Master

            Yeah, this is an issue the GlassFish guys are currently investigating (Jason Greene and myself outlined a fix to them in an email). I suggest filing an issue in the GlassFish issue tracker, you could post it back here for tracking, and I can paste in the relevant bits of the email.

            • 3. Re: ConversationScope not working
              Matt Corey Newbie

              Thanks for the quick feedback -- defect has been registered, and can be found here


              • 4. Re: ConversationScope not working
                Matt Corey Newbie

                BTW -- the issue has been corrected with build 71, released on Friday or Saturday.  Thanks!


                • 5. Re: ConversationScope not working
                  Andy Gibson Novice

                  Ok, I know it isn't related to your problem, but I have the same code and it isn't working.

                  My bean works when session scoped, but not when I change it to conversation scoped, it just re-creates the bean each time I call my JSF page. I am injecting an instance of a conversation (I assume @Current got renamed to @Inject?) and calling the begin conversation method :

                  public class CalculatorBean implements Serializable {
                      private void calculateSum() {
                          total = 0;
                          for (Integer number : values) {
                             total = total + number;
                      private void startConversation() {
                          if (conversation == null) {
                          if (!conversation.isLongRunning()) {

                  In my page I just have

                  <h:commandButton value="add" action="#{calculator.addValue}"/>

                  Which I assume will always go to the conversation scoped calculator which, by the time you call it a second time will be in a long running conversation? I just don't know whether I am missing something obvious.

                  I'm also deploying on Glassfish build b71 and Weld is running ok, my app works when I use session scope. Like you, I'm eager to see how the CDI conversation stuff works in JSF.

                  Any other bits of code that I missed?


                  Andy Gibson

                  • 6. Re: ConversationScope not working
                    Gavin King Master

                    Well this bit looks wrong:

                            if (conversation == null) {

                    Why would conversation be null?

                    Where do you inject it?

                    • 7. Re: ConversationScope not working
                      Nicklas Karlsson Master

                      Tried it on JBoss? Not saying that it shouldn't work everywhere, just trying to isolate the problem...

                      • 8. Re: ConversationScope not working
                        Nicklas Karlsson Master

                        Could you repeat this experiment, works for me:

                        Take the numberguess example, change Game to @ConversationScoped
                        in Game, add

                           @Inject Conversation conversation;
                           public boolean isTransient() {
                                return conversation.isTransient();
                           public void makeLong() {

                        and in home.xhtml

                                         <h:outputText value="Transient: #{game.transient}"/>
                                         <h:commandButton value="long" action="#{game.makeLong}"/>

                        inside the form tag.

                        Click the button, see the transient change to false and play the game (keeping the state)

                        If it doesn't work, file a GF JIRA

                        PS. Try the latest from trunk (or wait for the really-soon-now-1.0), I see you still have isLongRunning(), which indicates you aren't using the latest one(?)

                        • 9. Re: ConversationScope not working
                          Andy Gibson Novice

                          Sorry Nicklas, I should have included more code. My null conversation check was a 'just in case' check to see if injection was working (it is), it also logged a message if it was null. The conversation is never null, so that bit never executes and to inject the Conversation I use :

                          private Conversation conversation;

                          To inject the bean. I check isLongRunning() after calling begin, and it is true, it's almost like the conversation instance gets lost, or the conversation id is never propagated.

                          Yes, I am using an old version (The one in Glassfish b71), I'll try with a newer version first since it looks like my code is correct, otherwise, I'll try the weld example on Glassfish,


                          Andy Gibson

                          • 10. Re: ConversationScope not working
                            Nicklas Karlsson Master

                            It's not impossible that it's something in the conversation propagation that behaves differently between appservers even if they both should rely on the same JSF mechanism...

                            • 11. Re: ConversationScope not working
                              Andy Gibson Novice

                              Ok, I just got the latest Weld release, built it and the osgi bundle, installed it in Glassfish. I know it is there and working because the non-serializable DefaultLiteral problem has gone (redeploying is very smooth now) and isLongRunning() is no longer valid (I'm assuming it was replaced by isTransient())

                              However, I am still without conversation scope and isTransient() is always true. Even if I remove the conversation.begin() call from my code so I never start a conversation, isTransient() always returns true.

                              Another oddity is that while the conversion is injected into my bean successfully, if I put Conversation : #{conversation} in my page, no value appears.

                              Tomorrow, I'll try it with one of the weld examples to see if that works or not, or I'll try my code on JBoss.



                              • 12. Re: ConversationScope not working
                                Gavin King Master

                                Its name is javax.enterprise.context.conversation.

                                • 13. Re: ConversationScope not working
                                  Nicklas Karlsson Master

                                  isLongRunning is !transient so temporary conversations should show transient is true and long-running, transient is false.
                                  Conversation is not @Named so it's not directly visible to EL

                                  • 14. Re: ConversationScope not working
                                    Nicklas Karlsson Master

                                    Correction, it is @Named, see Gaving post

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