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) -- View this message in context: http://www.nabble.com/Why-do-managed-beans-must-implement-the-Serializable-interface-tf3796802.html#a10739407 Sent from the MyFaces - Users mailing list archive at 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