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Date: Wed, 21 Jun 2006 12:45:55 +0200
From: "Giovanni Motta" <mottagio@gmail.com>
To: "Beehive Users" <user@beehive.apache.org>
Subject: Re: Inheritance of java controls in pageflows.
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In https://issues.apache.org/jira/browse/BEEHIVE-1060 i read:

...The work around is to make the control field protected rather than
package protected...

Sorry, my fault, but i don't understand what does it mean...Carlin, could
you explain better, and/or complete your sample with the workaround? Many
thanks.
Giovanni.


2006/6/21, Giovanni Motta <mottagio@gmail.com>:
>
>  Thanks Carlin, i realized my explanation was not clear...
> I noticed the ClientInitializer is built only for 'father' pageflow P1
> (the base class), the one that holds the action and the control to be
> executed.
>
> For pageflow P2 that inherits from P1, ClientInitializer is NOT
> generated...I don't know if it is a bug the fact of not to generate it, or
> else the fact of look for it in this particular case, where the
> ClientInitializer is generated for the base class...
>
> I think my problem is quite similar to the one you mentioned, i also get a
> NPE when the control is referenced by base class, but i noticed also that
> other exception i reported. It is logged and probably handled by the
> framework, since it doesn't stop execution...maybe it should???
>
> Could you point me to JIRA (some kind of bug tracker, i suppose?).
> Many thanks, regards.
> Giovanni.
> 2006/6/20, Carlin Rogers <carlin.rogers@gmail.com>:
>
> > Hi Giovanni,
> >
> > The only issue I'm aware of is tracked in
> > https://issues.apache.org/jira/browse/BEEHIVE-1060 where a package
> > protected
> > control in a parent page flow is not being initialized when using a
> > derived
> > page flow inheriting from the parent. In this case it throws an NPE when
> > the
> > base class method tries to access the control because the control was
> > never
> > initialized. The non-initialization is similar to your experience but I
> > think different. Your stack trace indicates a problem in the
> > initializeClient() method of
> > org.apache.beehive.controls.api.bean.Controls. The call to the
> > ClassLoader
> > loadClass() is throwing a ClassNotFoundException for the class file of
> > your
> > generated ClientInitializer,
> > operazione1.Operazione1ControllerClientInitializer. You mentioned that
> > you
> > noticed that the ClientInitializer is built. Is the class file in
> > build/WEB-INF/classes/? Is it just an issue with the deployment in your
> > Tomcat 5.5.9 configuration. If you have a simple repro case, you can log
> > a
> > separate JIRA issue.
> >
> > Thanks,
> > Carlin
> >
> > On 6/20/06, Giovanni Motta <mottagio@gmail.com> wrote:
> > >
> > > Hi all, i'm new to the list.
> > > I'm trying to build a pageflows hierarchy (pageflow PF1 defines java
> > > control
> > > C1 and an action A1 that internally performs a call to a method of C1,
> > > pageflow PF2 inherits directly from PF1 and performs a forward to A1
> > ).
> > > All
> > > is done through annotations, no custom instanciation.
> > > I'm developing with BEA 9.2 tools, but I'm using a tomcat 5.5.9 server
> > for
> > > project requirements.
> > > The application starts fine on PF2, invokes action A1 of PF1 with no
> > > problem, but when the java control C1 is first used, i see with the
> > debug
> > > tool it is not instanciated (null) .
> > > Also, during initialization of pageflow P2, i see in console output
> > the
> > > exception reported.
> > > It seems like no client initializer class is found for P2, but i'm
> > > wondering
> > > if it's ordinary stuff, since i see the client initializer class is
> > built
> > > for pageflow P1, that in effect is the owner of the java
> > control...Bug???
> > >
> > > Apart from this, i would like to know if someone else has already
> > > developed
> > > something similar and can produce a sample code.
> > > Reading beehive 1.0.1 documentation, it seems this kind of inheritance
> > > should be fully supported.
> > > Problems with the container? Any points?
> > >
> > > Thanks in advance to who will answer.
> > >
> > > Exception follows:
> > >
> > > [INFO] FlowController - Handling exception in onCreate(),
> > FlowController
> > > operazione1.Operazione1Controller@1d6e3d2
> > >
> > > Throwable: *
> > >
> > org.apache.beehive.netui.pageflow.ControlFieldInitializationException*:
> > > Exception occurred while initializing control field
> > > operazione1.Operazione1Controller in
> > > /operazione1/Operazione1Controller.jpf.
> > >
> > > Stack Trace:
> > > *
> > >
> > >
> > org.apache.beehive.netui.pageflow.ControlFieldInitializationException*:
> > > Exception occurred while initializing control field
> > > operazione1.Operazione1Controller in
> > > /operazione1/Operazione1Controller.jpf.
> > >
> > > at
> > >
> > >
> > org.apache.beehive.netui.pageflow.internal.JavaControlUtils.initJavaControls
> > > (*JavaControlUtils.java:177*)
> > >
> > > at org.apache.beehive.netui.pageflow.PageFlowManagedObject.create(*
> > > PageFlowManagedObject.java:83*)
> > >
> > > at org.apache.beehive.netui.pageflow.FlowController.create (*
> > > FlowController.java:556*)
> > >
> > > at org.*apache*.beehive.netui.pageflow.PageFlowController.create(*
> > > PageFlowController.java:405*)
> > >
> > > at
> > org.apache.beehive.netui.pageflow.FlowControllerFactory.createPageFlow
> > > (*
> > > FlowControllerFactory.java:294*)
> > >
> > > at
> > >
> > >
> > org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.getFlowController
> > > (*PageFlowRequestProcessor.java:603*)
> > >
> > > at org.*apache*
> > > .beehive.netui.pageflow.PageFlowRequestProcessor.processInternal(*
> > > PageFlowRequestProcessor.java:508*)
> > >
> > > at org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.process(*
> > > PageFlowRequestProcessor.java:838*)
> > >
> > > at org.apache.beehive.netui.pageflow.AutoRegisterActionServlet.process
> > (*
> > > AutoRegisterActionServlet.java:634*)
> > >
> > > at org.apache.beehive.netui.pageflow.PageFlowActionServlet.process (*
> > > PageFlowActionServlet.java:156*)
> > >
> > > at org.apache.struts.action.ActionServlet.doGet(*ActionServlet.java
> > :507*)
> > >
> > > at javax.servlet.http.HttpServlet.service(*HttpServlet.java:689*)
> > >
> > > at javax.servlet.http.HttpServlet.service(*HttpServlet.java:802*)
> > >
> > > at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(*
> > > ApplicationFilterChain.java:252*)
> > >
> > > at org.apache.catalina.core.ApplicationFilterChain.doFilter(*
> > > ApplicationFilterChain.java:173*)
> > >
> > > at org.apache.catalina.core.ApplicationDispatcher.invoke(*
> > > ApplicationDispatcher.java:672*)
> > >
> > > at org.apache.catalina.core.ApplicationDispatcher.processRequest(*
> > > ApplicationDispatcher.java:463*)
> > >
> > > at org.apache.catalina.core.ApplicationDispatcher.doForward(*
> > > ApplicationDispatcher.java :398*)
> > >
> > > at org.apache.catalina.core.ApplicationDispatcher.forward(*
> > > ApplicationDispatcher.java:301*)
> > >
> > > at
> > >
> > >
> > org.apache.beehive.netui.pageflow.internal.DefaultForwardRedirectHandler.forward
> > > (*DefaultForwardRedirectHandler.java:127*)
> > >
> > > at
> > org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.doForward(*
> > > PageFlowRequestProcessor.java:1797*)
> > >
> > > at
> > >
> > >
> > org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.processPageFlowRequest
> > > (*PageFlowRequestProcessor.java:732*)
> > >
> > > at
> > >
> > org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.processInternal
> > > (*
> > > PageFlowRequestProcessor.java:469*)
> > >
> > > at org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.process
> > (*
> > > PageFlowRequestProcessor.java:838*)
> > >
> > > at org.apache.beehive.netui.pageflow.AutoRegisterActionServlet.process(*
> > > AutoRegisterActionServlet.java:634*)
> > >
> > > at org.apache.beehive.netui.pageflow.PageFlowActionServlet.process(*
> > > PageFlowActionServlet.java:156*)
> > >
> > > at org.apache.struts.action.ActionServlet.doGet (*ActionServlet.java
> > :507*)
> > >
> > > at javax.servlet.http.HttpServlet.service(*HttpServlet.java:689*)
> > >
> > > at javax.servlet.http.HttpServlet.service(*HttpServlet.java:802*)
> > >
> > > at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (*
> > > ApplicationFilterChain.java:252*)
> > >
> > > at org.apache.catalina.core.ApplicationFilterChain.doFilter(*
> > > ApplicationFilterChain.java:173*)
> > >
> > > at org.apache.catalina.core.StandardWrapperValve.invoke (*
> > > StandardWrapperValve.java:213*)
> > >
> > > at org.apache.catalina.core.StandardContextValve.invoke(*
> > > StandardContextValve.java:178*)
> > >
> > > at org.apache.catalina.core.StandardHostValve.invoke (*
> > > StandardHostValve.java
> > > :126*)
> > >
> > > at org.apache.catalina.valves.ErrorReportValve.invoke(*
> > > ErrorReportValve.java
> > > :105*)
> > >
> > > at org.apache.catalina.core.StandardEngineValve.invoke (*
> > > StandardEngineValve.java:107*)
> > >
> > > at org.apache.catalina.connector.CoyoteAdapter.service(*
> > CoyoteAdapter.java
> > > :148*)
> > >
> > > at org.apache.coyote.http11.Http11Processor.process(*
> > Http11Processor.java
> > > :856*)
> > >
> > > at
> > >
> > >
> > org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection
> > > (*Http11Protocol.java:744*)
> > >
> > > at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket (*
> > > PoolTcpEndpoint.java:527*)
> > >
> > > at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(*
> > > LeaderFollowerWorkerThread.java:80*)
> > >
> > > at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run (*
> > > ThreadPool.java:684*)
> > >
> > > at java.lang.Thread.run(*Thread.java:595*)
> > >
> > > Caused by: *java.lang.ClassNotFoundException*:
> > > operazione1.Operazione1ControllerClientInitializer
> > >
> > > at org.apache.catalina.loader.WebappClassLoader.loadClass(*
> > > WebappClassLoader.java:1332*)
> > >
> > > at org.apache.catalina.loader.WebappClassLoader.loadClass(*
> > > WebappClassLoader.java:1181*)
> > >
> > > at org.apache.beehive.controls.api.bean.Controls.initializeClient(*
> > > Controls.java:131*)
> > >
> > > at
> > >
> > >
> > org.apache.beehive.netui.pageflow.internal.JavaControlUtils.initJavaControls
> > > (*JavaControlUtils.java:172*)
> > >
> > > ... 42 more
> > >
> > >
> >
> >
>
>

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