Well, I tried to link my beans with the faces-config.xml (see
http://www.jsffaq.com/Wiki.jsp?page=HowToAccessOneManagedBeanFromAnotherManagedBean
http://www.jsffaq.com/Wiki.jsp?page=HowToAccessOneManagedBeanFromAnotherManagedBean
).
In my case B is a manged property of A.
Now I press a command button, a property of A is changed and additionally
properties of B are changed (A accesses B via the managed property
mechanism). But unfortunately the properties of B aren't updated in my view.
So I added debug logging and found out, that after pressing the command
button A is serialized (with B as a member variable) and after the
deserialization the wrong B bean is updated (using
System.identityhascode(...).
If I use the faces-config.xml to link the beans, isn't it correct that B is
a member of A (see my sample below)...?!?!?
class B implements Serializable {
String name;
String address;
getName() {
....
}
class A implements Serializable {
String name;
B b;
getB() {
...
<managed-bean>
<managed-bean-name>A</managed-bean-name>
<managed-bean-class>at.co.systema.A</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
<managed-property>
<property-name>b</property-name>
<property-class>at.co.systema.B</property-class>
<value>#{b}</value>
</managed-property>
</managed-bean>
<managed-bean>
<managed-bean-name>b</managed-bean-name>
<managed-bean-class>at.co.systema.ce.B</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
David Delbecq wrote:
>
> 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)
>>>>
>>>
>>>
>>
>>
>
>
>
--
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