Hi,
Thanks for your response.
I have a additional question:
In tapestry, is there any way to invoke an method when "page begin render"
one time?
I need retrieve the records from database before the page begin render, this
is a heavy weight operation, I don't want it will be invoke twice.
Thanks.
Kind regards.
Huang Yifu »ÆÞȸ£
From: "Howard M. Lewis Ship (JIRA)" <[email protected]>
To: [EMAIL PROTECTED]
Subject: [jira] Closed: (TAPESTRY-744) page method pageBeginRender() was
been invoked twice when direct link to a page
Date: Sat, 12 Nov 2005 04:08:05 +0100 (CET)
[ http://issues.apache.org/jira/browse/TAPESTRY-744?page=all ]
Howard M. Lewis Ship closed TAPESTRY-744:
-----------------------------------------
Resolution: Invalid
Assign To: Howard M. Lewis Ship
This is correct behavior; pageBeginRender() is invoked when a form within a
page rewinds, then again when the response page is rendered.
> page method pageBeginRender() was been invoked twice when direct link to
a page
>
-------------------------------------------------------------------------------
>
> Key: TAPESTRY-744
> URL: http://issues.apache.org/jira/browse/TAPESTRY-744
> Project: Tapestry
> Type: Bug
> Components: Framework
> Versions: 4.0
> Environment: windows jboss
> Reporter: HUANG Yifu
> Assignee: Howard M. Lewis Ship
>
> I used a @Submit component to invoke the delete method of page class,
> -----------------
> <span jwcid="@Submit" class="button" listener="ognl:listeners.delete"
label="message:button.delete"
> onclick="javascript: return deleteConfirm();"
parameters="ognl:currentObject.id" />
> -----------------
> and found the pageBeginRender method was invoked twice, the flow listed
below:
> =================================
> first time(invoke pageBeginRender method)
> -----------------
> at
org.apache.tapestry.AbstractPage.firePageBeginRender(AbstractPage.java:478)
> at
org.apache.tapestry.AbstractPage.beginPageRender(AbstractPage.java:529)
> at
org.apache.tapestry.engine.RequestCycle.rewindForm(RequestCycle.java:439)
> at org.apache.tapestry.form.Form.trigger(Form.java:338)
> at
org.apache.tapestry.engine.DirectService.triggerComponent(DirectService.java:144)
> at
org.apache.tapestry.engine.DirectService.service(DirectService.java:130)
> then invoke listener mothod delete()
> ------------------------------------------
> 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
org.apache.tapestry.listener.ListenerMethodInvokerImpl.invokeTargetMethod(ListenerMethodInvokerImpl.java:214)
> at
org.apache.tapestry.listener.ListenerMethodInvokerImpl.invokeListenerMethod(ListenerMethodInvokerImpl.java:155)
> at
org.apache.tapestry.listener.ListenerMethodInvokerImpl.searchAndInvoke(ListenerMethodInvokerImpl.java:124)
> at
org.apache.tapestry.listener.ListenerMethodInvokerImpl.invokeListenerMethod(ListenerMethodInvokerImpl.java:73)
> at
org.apache.tapestry.listener.SyntheticListener.actionTriggered(SyntheticListener.java:51)
> at
org.apache.tapestry.listener.ListenerInvokerTerminator.invokeListener(ListenerInvokerTerminator.java:51)
> at
$ListenerInvoker_10778cfb798.invokeListener($ListenerInvoker_10778cfb798.java)
> at
org.apache.tapestry.form.AbstractSubmit.handleClick(AbstractSubmit.java:81)
> at
org.apache.tapestry.form.AbstractSubmit.rewindFormComponent(AbstractSubmit.java:49)
> at
org.apache.tapestry.form.AbstractFormComponent.renderComponent(AbstractFormComponent.java:115)
> at
org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:617)
> then the second time(invoke pageBeginRender method)
> ---------------------------------------
> at
org.apache.tapestry.AbstractPage.firePageBeginRender(AbstractPage.java:478)
> at org.apache.tapestry.AbstractPage.renderPage(AbstractPage.java:268)
> at
org.apache.tapestry.engine.RequestCycle.renderPage(RequestCycle.java:368)
> at
org.apache.tapestry.services.impl.ResponseRendererImpl.renderResponse(ResponseRendererImpl.java:71)
> at
$ResponseRenderer_10778cfb78a.renderResponse($ResponseRenderer_10778cfb78a.java)
> at
org.apache.tapestry.engine.DirectService.service(DirectService.java:135)
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