On 3/15/08, Matej Knopp <[EMAIL PROTECTED]> wrote:
> Your page implementing Externalizable breaks wicket. Wicket relies of
> Page#writeReplace, writeObject, readObject being called. Are you sure
> you're no seing any stacktrace?
>
Ok, I think I'm getting somewhere with this. I changed my exploration
code a bit. Here's my HomePage class (sorry for the verbose email,
but I'm trying to understand this better):
public class HomePage extends WebPage
{
private static final long serialVersionUID = 1L;
private static final Logger log = LoggerFactory.getLogger(HomePage.class);
private int counter;
/**
* Constructor that is invoked when page is invoked without a session.
*
* @param parameters Page parameters
*/
public HomePage( final PageParameters parameters )
{
// Add the simplest type of label
add(new Label("message", new LoadableDetachableModel()
{
protected Object load()
{
return "I've been called " + counter++ + " times.";
}
}));
add(new Link("refreshLink")
{
public void onClick()
{
log.info("I'm being called on object with identity " +
System.identityHashCode(HomePage.this));
setResponsePage(HomePage.this);
}
});
}
protected Object writeReplace() throws ObjectStreamException
{
final Object replacement = super.writeReplace();
log.info("I'm (identity " + System.identityHashCode(this) + ")
being write replaced by object " + replacement);
return replacement;
}
}
And, here's the HomePage.html file:
<html>
<head>
<title>Wicket Quickstart Archetype Homepage</title>
</head>
<body>
<strong>Wicket Quickstart Archetype Homepage</strong>
<br/><br/>
<span wicket:id="message">message will be here</span>
<p>
Click <a href="." wicket:id="refreshLink">here</a> to refresh me!
</p>
</body>
</html>
Now, I see the expected behavior in IE7, but not in Firefox. When I
hit the back button in IE7, the page is actually refreshed. When I
hit the back button in Firefox, it isn't. Does the page completely
have to refresh (when hitting "back") to get the functionality to work
properly? I would think that the link URL would tell you enough to go
get the proper version of the page. What I expect to happen is that
when you hit back and click the link, it should display "I have been
called 1 times." Am I understanding what's supposed to be going on
correctly? Here's what happens with IE7:
1. View the HomePage (counter == 0)
INFO - HomePage - I'm (identity 8940240) being
write replaced by object [Page class =
com.carmanconsulting.wicket.demo.HomePage, id = 0, version = 0]
2. Click the link (counter == 1)
INFO - HomePage - I'm being called on object with
identity 8940240
INFO - HomePage - I'm (identity 8940240) being
write replaced by object [Page class =
com.carmanconsulting.wicket.demo.HomePage, id = 0, version = 0]
3. Hit the back button (counter == 0)
INFO - HomePage - I'm (identity 4113761) being
write replaced by object [Page class =
com.carmanconsulting.wicket.demo.HomePage, id = 1, version = 0]
4. Click the link again (counter == 1)
INFO - HomePage - I'm being called on object with
identity 4113761
INFO - HomePage - I'm (identity 4113761) being
write replaced by object [Page class =
com.carmanconsulting.wicket.demo.HomePage, id = 1, version = 0]
And, here's what happens with Firefox:
1. View the HomePage (counter == 0)
INFO - HomePage - I'm (identity 5068149) being
write replaced by object [Page class =
com.carmanconsulting.wicket.demo.HomePage, id = 0, version = 0]
2. Click the link (counter == 1)
INFO - HomePage - I'm being called on object with
identity 5068149
INFO - HomePage - I'm (identity 5068149) being
write replaced by object [Page class =
com.carmanconsulting.wicket.demo.HomePage, id = 0, version = 0]
3. Hit the back button (counter == 0)
*** No Output! ***
4. Click the link again (counter == 2)
INFO - HomePage - I'm being called on object with
identity 5068149
INFO - HomePage - I'm (identity 5068149) being
write replaced by object [Page class =
com.carmanconsulting.wicket.demo.HomePage, id = 0, version = 0]
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