No Converter was created

[mkhan18]

Hi i am working on a project where i just have a very basic requirement that when the session times out, the page flow should redirect to relogin page. in te mean while the current page view should be saved and after relogin the request should  be redirect to the last working page with all the data  populated which was not saved because the user didnt click save button in timely fashion and  the session timed out.
i have manage to redirect the flow to login page after timeout and then after logging in it takes me backto the last view doing history.go(-1) but when i hit save button it throws an error.
any help would be appreciated. here is the exception dump.

16:17:12,048 WARN  [lifecycle] executePhase(RESTORE_VIEW 1,com.sun.faces.context.FacesContextImpl@1173e3d) threw exception
com.sun.facelets.tag.TagException: /screens/FormModification.xhtml @29,25 <s:convertEntity> No Converter was created
     at com.sun.facelets.tag.jsf.ConvertHandler.apply(ConvertHandler.java:114)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
     at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
     at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
     at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
     at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.tag.ui.DefineHandler.applyDefinition(DefineHandler.java:64)
     at com.sun.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:131)
     at com.sun.facelets.impl.DefaultFaceletContext$TemplateManager.apply(DefaultFaceletContext.java:337)
     at com.sun.facelets.impl.DefaultFaceletContext.includeDefinition(DefaultFaceletContext.java:307)
     at com.sun.facelets.tag.ui.InsertHandler.apply(InsertHandler.java:68)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
     at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:248)
     at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:294)
     at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:273)
     at com.sun.facelets.impl.DefaultFaceletContext.includeFacelet(DefaultFaceletContext.java:140)
     at com.sun.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:113)
     at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
     at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
     at com.sun.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:95)
     at com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:524)
     at com.sun.facelets.FaceletViewHandler.restoreView(FaceletViewHandler.java:340)
     at org.ajax4jsf.application.ViewHandlerWrapper.restoreView(ViewHandlerWrapper.java:116)
     at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:141)
     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
     at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
     at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
     at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
     at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
     at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
     at net.airpoint.listener.session.FilterListener.doFilter(FilterListener.java:75)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
     at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
     at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
     at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
     at java.lang.Thread.run(Unknown Source)
16:17:12,048 WARN  [ExceptionFilter] handling uncaught exception
javax.servlet.ServletException: /screens/FormModification.xhtml @29,25 <s:convertEntity> No Converter was created
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:249)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
     at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
     at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
     at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
     at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
     at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
     at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
     at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
     at net.airpoint.listener.session.FilterListener.doFilter(FilterListener.java:75)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
     at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
     at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
     at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
     at java.lang.Thread.run(Unknown Source)
Caused by: com.sun.facelets.tag.TagException: /screens/FormModification.xhtml @29,25 <s:convertEntity> No Converter was created
     at com.sun.facelets.tag.jsf.ConvertHandler.apply(ConvertHandler.java:114)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
     at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
     at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
     at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.tag.jsf.ComponentHandler.applyNextHandler(ComponentHandler.java:314)
     at com.sun.facelets.tag.jsf.ComponentHandler.apply(ComponentHandler.java:169)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.tag.ui.DefineHandler.applyDefinition(DefineHandler.java:64)
     at com.sun.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:131)
     at com.sun.facelets.impl.DefaultFaceletContext$TemplateManager.apply(DefaultFaceletContext.java:337)
     at com.sun.facelets.impl.DefaultFaceletContext.includeDefinition(DefaultFaceletContext.java:307)
     at com.sun.facelets.tag.ui.InsertHandler.apply(InsertHandler.java:68)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
     at com.sun.facelets.tag.CompositeFaceletHandler.apply(CompositeFaceletHandler.java:47)
     at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
     at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:248)
     at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:294)
     at com.sun.facelets.impl.DefaultFacelet.include(DefaultFacelet.java:273)
     at com.sun.facelets.impl.DefaultFaceletContext.includeFacelet(DefaultFaceletContext.java:140)
     at com.sun.facelets.tag.ui.CompositionHandler.apply(CompositionHandler.java:113)
     at com.sun.facelets.compiler.NamespaceHandler.apply(NamespaceHandler.java:49)
     at com.sun.facelets.compiler.EncodingHandler.apply(EncodingHandler.java:25)
     at com.sun.facelets.impl.DefaultFacelet.apply(DefaultFacelet.java:95)
     at com.sun.facelets.FaceletViewHandler.buildView(FaceletViewHandler.java:524)
     at com.sun.facelets.FaceletViewHandler.restoreView(FaceletViewHandler.java:340)
     at org.ajax4jsf.application.ViewHandlerWrapper.restoreView(ViewHandlerWrapper.java:116)
     at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:141)
     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
     ... 40 more

[kragoth]

What you are trying to do will not work... lets think about what is happening in your scenario.

• User logs into system (Session created -> Session scope SEAM beans etc created)


• User navigates to some system page(Page/Conversation scope beans setup)


• User makes changes on page, but does not press save(Server side values have NOT been updated)


• User walks away from PC and SESSION times out. (What happens when a session times out? My understanding is that all of your SEAM beans in that session are now destroyed.)


• User comes back to PC and has been redirected to login page. (Old Session is now gone/destroyed/garbage collected etc etc)


• User logs in and system does a history(-1). So what you are saying is go back to your previous page but on a completely new Session. How is that supposed to work? (If the old session has been destroyed then a history(-1) will do very weird things for you. Depending on a whole bunch of other circumstances you will get the error you are getting or even weirder ones, or just plain null pointer exceptions)

I don't know how to solve your problem, but I know it has been discussed before. So take the time to search these forums and see if you can find something that will help you. :)

[mkhan18]

Hi Tim and thanks for the reply. what you said makes sence and did believed it that it would do wierd things once session is destroyed but then i read about putting
   <context-param>
      <param-name>facelets.BUILD_BEFORE_RESTORE</param-name>
      <param-value>true</param-value>
   </context-param>
 tags in web.xml which as it states rebulid the view begore restore and hence i dont get view exrired exception any more. but i get:
com.sun.facelets.tag.TagException: /screens/FormModification.xhtml @29,25 <s:convertEntity> No Converter was created
        at com.sun.facelets.tag.jsf.ConvertHandler.apply(ConvertHandler.java:114)  exception instead.

[kragoth]

The problem here is not your view. The problem is that the data/objects behind your view are gone. As far as I can remember (because I don't use the <s:convertEntity/> anymore I wrote my own entity converter) the EntityConverter is a stateful converter. It has a store of entity to string mappings. So that when getAsObject or getAsString are called it doesn't have to hit the database every time. (I know this is a bad explanation but.... only just got to work so my mind is still waking up :P )

So your getting the converter error because when your session timed out the converter state was lost. So now when the getAsString is called when rendering the view it fails because the converter is gone.

I think the easiest way to think of it is that the <s:convertEntity/> basically works like a SEAM bean. When your session times out that instance of the converter is destroyed. Thus you will not be able to restore that page in a new session.

Maybe one of the SEAM guys can give a better explanation... sorry :S

[joblini]

Hello Mustafa,

Instead of using s:entityConverter, which, as Tim pointed out, loses its state, write a standard JSF Converter , very simple code, just two methods: getAsObject and getAsString.  In getAsObject, do an entityManager.find using the passed in id.  In getAsString, just do a toString on the id of the passing in object.  Seam has an annotation, @Converter, which saves you from having to register the Converter in faces-config.xml.  Just one thing though, you can't inject components in a Converter, so you will need to do a Component.getInstance to obtain the Entity Manager.

It would be interesting to hear whether you can get this whole scenario working.  I have tried using the facelets.BUILD_BEFORE_RESTORE parameter, it seemed to solve the View Expired problem, but some other things stopped working (sorry I can't be more specific), it might have been something I could have worked around, but I didn't look into it any further.

Regards,
Ingo

[mkhan18]

thanks Ingo.

[mkhan18]

Hi Ingo,
 i have tried doinng enitityManager.find but the entitymanager is coming null. i have tried injeccting entity manager using @In(create = true) but still its null. i think that seam is not initializing the my converter class as a seam component rather just as a normal class and thats why entity manager is coming null as its unable to use the seam components.
any suggestions as to how to get the seam to inject entity manager into my custom converter.

[joblini]

You can't use @In in a @Converter.  In fact, converters should be annotated with @BypassInterceptors.

Instead, do Component.getInstance(entityManager, true);

[pdale]

Hi I have a very similar problem to this - I have implemented the facelets.BUILDBEFORERESTORE in the web.xml and have effectively got this to work as I can let the session expire - log back in and get returned to the last page which still has the old values, I can then save this to the DB.  BUT....

Once I implemented the facelets.BUILDBEFORERESTORE in web.xml this seems to break all my h:commandButton tags - they dont do the action anymore, the call isnt hitting the server side - has anyone else come across this issue at all?