myfaces-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From David Delbecq <de...@oma.be>
Subject Re: Why do managed beans must implement the Serializable interface
Date Wed, 23 May 2007 15:48:02 GMT
If you don't want serialized bean, make them request scope bean.
Session scope bean must be serializable whatever happen.

Not sure i understand you last problem, but if you want to link B to A
(so A see the B instance managed by JSF) you can do this in
faces-config.xml, using managed-properties. That way, if A and B are
sessions scope, you are guaranteed they stay together. (This can also
work if B is session scope and A request, JSF will setup A at each request)

Hope this help.

En l'instant précis du 23/05/07 17:39, Trumml s'exprimait en ces termes:
> Thanks for this short reply.
> But this serialization is a little bit problematic for me...
> I have a site with two different backing beans and a command button. The
> command button calls method A.1 from bean A, the site is reloaded (the
> method changes some properties of bean A) and all properties of A are
> renewed within the jsf site. Additionally A.1 changes some properties of
> bean B but those properties are not renewed within the view.
> So I tried to use component binding with bean B but this does not work
> because I can not use HtmlOutputText with my bean B because it is not
> serializable...?
>
> <h:commandButton value="action" action="#{A.1}" />
> <h:outputText value="#{A.property}"/>
> <h:outputText value="#{B.property}"/>
>
>
>
>
> Werner Punz-2 wrote:
>   
>> This has to be done due to the jsf inherent state saving and also some
>> app server serialize the sessions for clustering.
>>
>> Werner
>>
>>
>> Trumml schrieb:
>>     
>>> I use MyFaces (1.1.5) with Tomahawk and Facelet support. I added the
>>> following commmand to my xhtlm site:
>>> <h:commandButton value="doXY" action="#{PatientNavigatorBean.doXY}" />
>>> When I press this button an Exception is thrown because the
>>> PatientNavigatorBean is not serializable. My question is: which managed
>>> beans have to be serializable, when and why?
>>> When I add the Serializable interface to my managed bean everything works
>>> fine but I do want to know why I have to do this and are there possibly
>>> any
>>> fields in my bean which might be transient?
>>>
>>> => I already found a forum post but it does not contain the correct
>>> answer
>>> for my question i guess (
>>> http://www.nabble.com/What-requires-implementing-the-Serializable-interface--tf991035.html#a2566919
>>> http://www.nabble.com/What-requires-implementing-the-Serializable-interface--tf991035.html#a2566919
>>> )
>>>
>>> 16:16:37,983 ERROR [JspStateManagerImpl] Exiting serializeView - Could
>>> not
>>> serialize state: at.co.systema.ce.jsf.PatientNavigator
>>> java.io.NotSerializableException: at.co.systema.ce.jsf.PatientNavigator
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1081)
>>>         at
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
>>>         at
>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
>>>         at
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
>>>         at
>>> java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
>>>         at
>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
>>>         at
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
>>>         at
>>> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
>>>         at
>>> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
>>>         at
>>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
>>>         at java.util.ArrayList.writeObject(ArrayList.java:569)
>>>         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:585)
>>>         at
>>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:917)
>>>         at
>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1339)
>>>         at
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
>>>         at
>>> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
>>>         at
>>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
>>>         at java.util.ArrayList.writeObject(ArrayList.java:569)
>>>         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:585)
>>>         at
>>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:917)
>>>         at
>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1339)
>>>         at
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
>>>         at
>>> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
>>>         at
>>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
>>>         at java.util.HashMap.writeObject(HashMap.java:1039)
>>>         at sun.reflect.GeneratedMethodAccessor87.invoke(Unknown Source)
>>>         at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>         at java.lang.reflect.Method.invoke(Method.java:585)
>>>         at
>>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:917)
>>>         at
>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1339)
>>>         at
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
>>>         at
>>> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
>>>         at
>>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
>>>         at java.util.ArrayList.writeObject(ArrayList.java:569)
>>>         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:585)
>>>         at
>>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:917)
>>>         at
>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1339)
>>>         at
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
>>>         at
>>> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
>>>         at
>>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
>>>         at java.util.ArrayList.writeObject(ArrayList.java:569)
>>>         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:585)
>>>         at
>>> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:917)
>>>         at
>>> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1339)
>>>         at
>>> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
>>>         at
>>> java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
>>>         at
>>> java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
>>>         at
>>> java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
>>>         at
>>> org.apache.myfaces.application.jsp.JspStateManagerImpl.serializeView(JspStateManagerImpl.java:512)
>>>         at
>>> org.apache.myfaces.application.jsp.JspStateManagerImpl.saveSerializedViewInServletSession(JspStateManagerImpl.java:453)
>>>         at
>>> org.apache.myfaces.application.jsp.JspStateManagerImpl.saveSerializedView(JspStateManagerImpl.java:312)
>>>         at
>>> com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:594)
>>>         at
>>> org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41)
>>>         at
>>> org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:132)
>>>         at javax.faces.webapp.FacesServlet.service(FacesServlet.java:140)
>>>         at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
>>>         at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
>>>         at
>>> org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
>>>         at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
>>>         at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
>>>         at
>>> org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:75)
>>>         at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
>>>         at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
>>>         at
>>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
>>>         at
>>> org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
>>>         at
>>> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>>>         at
>>> org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
>>>         at
>>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
>>>         at
>>> org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
>>>         at
>>> org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:66)
>>>         at
>>> org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
>>>         at
>>> org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:162)
>>>         at
>>> org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
>>>         at
>>> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>>>         at
>>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
>>>         at
>>> org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
>>>         at
>>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
>>>         at
>>> org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
>>>         at
>>> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>>>         at
>>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>>>         at
>>> org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
>>>         at
>>> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>>>         at
>>> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
>>>         at
>>> org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
>>>         at
>>> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
>>>         at
>>> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
>>>         at
>>> org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
>>>         at
>>> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
>>>         at java.lang.Thread.run(Thread.java:595)
>>>       
>>
>>     
>
>   


Mime
View raw message