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Posted to users@tapestry.apache.org by Sam Gendler <sg...@ideasculptor.com> on 2006/06/21 04:38:43 UTC
serviceParameters or listenerParameters both null during validate()!
I am trying to build an ExternalCallback during my validate method, in
order to return to the same place I was trying to reach when my
session expired. I click on a link which includes query string
parameters courtesy of the parameter included in my listener and the
validate() method fails to authorize the anonymous user, so it builds
an ExternalCallback with parameters cycle.getListenerParameters() as
the array of params, which is always null. The same thing occurs when
accessing getServiceParameters().
So, the brief form of the code looks like this:
public class MyPage
extends BasePage
implements IExternalPage, PageValidateListener
{
public void pageValidate(PageEvent event)
{
if (notLoggedIn()) {
LoginPage page = getLoginPage();
page.setNextPage(new ExternalCallback(event.getPage(),
event.getRequestCycle().getServiceParameters());
throw new PageRedirectException(page);
}
}
public void activateExternalPage(Object[] parameters, IRequestCycle cycle) {
cycle.setListenerParameters(parameters);
log.debug("set listenerParams: " + parameters);
}
public IPage sampleListener(int someParameter) {
IPage somePage = getSomePage();
// do some work
return somePage;
}
}
So, basically, I can't figure out how to get the parameters AND I
cannot figure out how I would cause the listener to be called after
the redirect.
Any thoughts?
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Re: serviceParameters or listenerParameters both null during validate()!
Posted by Sam Gendler <sg...@ideasculptor.com>.
OK, so the whole mechanism does work correctly, but only if the stale
session occurs when the user is accessing an ExternalLink. In that
case, storing the serviceParameters in the ExternalCallback is
sufficient for getting good values to deal with during
activateExternalPage(). Unfortunately, it is inevitably possilbe to
get a stale session when clicking non-external links, such as table
colum sorts or page changes, etc. My solution was to include a
special parameter on all ExternalLinks, which I check for in the
activate code. If I don't find the special parameter, I assume I am
not in an ExternalLink call, so I handle it via some other default
mechanism. If the page doesn't absolutely require certain parameters,
then I just let the page load, but if it does, the page has to provide
an alternative location to redirect to. It works, but required some
significant changes to my BasePage class in order to provide
overridable methods in all my pages. I'm just posting this here so
that it is findable in the web archives for the next person to stumble
across it.
--sam
On 6/20/06, Sam Gendler <sg...@ideasculptor.com> wrote:
> Nope, same problem from within validate() instead of pageValidate(),
> so the javadoc for ExternalCallback appears to be just plain old
> incorrect. Bummer.
>
> --sam
>
>
> On 6/20/06, Sam Gendler <sg...@ideasculptor.com> wrote:
> > Judging by the javadoc example in ExternalCallback, if I overlod the
> > validate() method instead of implementig pageValidateListener, I will
> > be able to do what i need to do. Is there any reason not to do this,
> > since validate() doesn't appear to actually be deprecated?
> >
> > --sam
> >
> >
> > On 6/20/06, Sam Gendler <sg...@ideasculptor.com> wrote:
> > > So the entire ExternalCallback/ExternalPage thing is actually entirely
> > > worthless when it comes to handling something like remembering where
> > > they were going when they failed to authenticate? That seems odd,
> > > especially since it is called out as being suitable for exactly that
> > > in the tapestry pdf book. How are people doing form based
> > > authentication or is everyone just going to some default page after
> > > logging in? It seems odd to me that validate() would be called out as
> > > an adequate place to do authentication/authorization and yet provide
> > > no way to discover what would have happened if validation succeeded.
> > >
> > > Incidentally, how would one execute a listener arbitrarily from
> > > somewhere? I can see a way to do what I want by using the
> > > ServletRequest directly, but I'd have to be able to call the listener
> > > myself.
> > >
> > > --sam
> > >
> > >
> > > On 6/20/06, Jesse Kuhnert <jk...@gmail.com> wrote:
> > > > Not a fun circumstance I'm sure. It's still probably better than getting
> > > > NPE's.
> > > >
> > > > At the point when your pageValidate() method is called I'm not sure if you
> > > > are in the right "state" to even bother looking for the parameters this way.
> > > > The majority of requests in Tapestry end up going through the DirectService.
> > > > http://svn.apache.org/viewvc/tapestry/tapestry4/trunk/framework/src/java/org/apache/tapestry/engine/DirectService.java?view=markup
> > > >
> > > > There are two very distinct states that things can be in within this
> > > > service..Form submissions / listener method invocations is one, page renders
> > > > are another. If you look at the source of the supplied link you will find
> > > > that it is very probably that your listener parameters have not even been
> > > > set yet.
> > > >
> > > > Someone else was working on this Callback interface for things. Who was it ?
> > > > Scott Russel / Ron Piterman ? I can't tell anymore, there are always so many
> > > > hidden libraries these days.
> > > >
> > > > On 6/20/06, Sam Gendler <sg...@ideasculptor.com> wrote:
> > > > >
> > > > > I am trying to build an ExternalCallback during my validate method, in
> > > > > order to return to the same place I was trying to reach when my
> > > > > session expired. I click on a link which includes query string
> > > > > parameters courtesy of the parameter included in my listener and the
> > > > > validate() method fails to authorize the anonymous user, so it builds
> > > > > an ExternalCallback with parameters cycle.getListenerParameters() as
> > > > > the array of params, which is always null. The same thing occurs when
> > > > > accessing getServiceParameters().
> > > > >
> > > > > So, the brief form of the code looks like this:
> > > > >
> > > > > public class MyPage
> > > > > extends BasePage
> > > > > implements IExternalPage, PageValidateListener
> > > > > {
> > > > > public void pageValidate(PageEvent event)
> > > > > {
> > > > > if (notLoggedIn()) {
> > > > > LoginPage page = getLoginPage();
> > > > > page.setNextPage(new ExternalCallback(event.getPage(),
> > > > > event.getRequestCycle().getServiceParameters());
> > > > > throw new PageRedirectException(page);
> > > > > }
> > > > > }
> > > > >
> > > > > public void activateExternalPage(Object[] parameters, IRequestCycle
> > > > > cycle) {
> > > > > cycle.setListenerParameters(parameters);
> > > > > log.debug("set listenerParams: " + parameters);
> > > > > }
> > > > >
> > > > > public IPage sampleListener(int someParameter) {
> > > > > IPage somePage = getSomePage();
> > > > > // do some work
> > > > > return somePage;
> > > > > }
> > > > > }
> > > > >
> > > > > So, basically, I can't figure out how to get the parameters AND I
> > > > > cannot figure out how I would cause the listener to be called after
> > > > > the redirect.
> > > > >
> > > > > Any thoughts?
> > > > >
> > > > > ---------------------------------------------------------------------
> > > > > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > > > > For additional commands, e-mail: users-help@tapestry.apache.org
> > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > > Jesse Kuhnert
> > > > Tacos/Tapestry, team member/developer
> > > >
> > > > Open source based consulting work centered around
> > > > dojo/tapestry/tacos/hivemind.
> > > >
> > > >
> > >
> >
>
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Re: serviceParameters or listenerParameters both null during validate()!
Posted by Sam Gendler <sg...@ideasculptor.com>.
Nope, same problem from within validate() instead of pageValidate(),
so the javadoc for ExternalCallback appears to be just plain old
incorrect. Bummer.
--sam
On 6/20/06, Sam Gendler <sg...@ideasculptor.com> wrote:
> Judging by the javadoc example in ExternalCallback, if I overlod the
> validate() method instead of implementig pageValidateListener, I will
> be able to do what i need to do. Is there any reason not to do this,
> since validate() doesn't appear to actually be deprecated?
>
> --sam
>
>
> On 6/20/06, Sam Gendler <sg...@ideasculptor.com> wrote:
> > So the entire ExternalCallback/ExternalPage thing is actually entirely
> > worthless when it comes to handling something like remembering where
> > they were going when they failed to authenticate? That seems odd,
> > especially since it is called out as being suitable for exactly that
> > in the tapestry pdf book. How are people doing form based
> > authentication or is everyone just going to some default page after
> > logging in? It seems odd to me that validate() would be called out as
> > an adequate place to do authentication/authorization and yet provide
> > no way to discover what would have happened if validation succeeded.
> >
> > Incidentally, how would one execute a listener arbitrarily from
> > somewhere? I can see a way to do what I want by using the
> > ServletRequest directly, but I'd have to be able to call the listener
> > myself.
> >
> > --sam
> >
> >
> > On 6/20/06, Jesse Kuhnert <jk...@gmail.com> wrote:
> > > Not a fun circumstance I'm sure. It's still probably better than getting
> > > NPE's.
> > >
> > > At the point when your pageValidate() method is called I'm not sure if you
> > > are in the right "state" to even bother looking for the parameters this way.
> > > The majority of requests in Tapestry end up going through the DirectService.
> > > http://svn.apache.org/viewvc/tapestry/tapestry4/trunk/framework/src/java/org/apache/tapestry/engine/DirectService.java?view=markup
> > >
> > > There are two very distinct states that things can be in within this
> > > service..Form submissions / listener method invocations is one, page renders
> > > are another. If you look at the source of the supplied link you will find
> > > that it is very probably that your listener parameters have not even been
> > > set yet.
> > >
> > > Someone else was working on this Callback interface for things. Who was it ?
> > > Scott Russel / Ron Piterman ? I can't tell anymore, there are always so many
> > > hidden libraries these days.
> > >
> > > On 6/20/06, Sam Gendler <sg...@ideasculptor.com> wrote:
> > > >
> > > > I am trying to build an ExternalCallback during my validate method, in
> > > > order to return to the same place I was trying to reach when my
> > > > session expired. I click on a link which includes query string
> > > > parameters courtesy of the parameter included in my listener and the
> > > > validate() method fails to authorize the anonymous user, so it builds
> > > > an ExternalCallback with parameters cycle.getListenerParameters() as
> > > > the array of params, which is always null. The same thing occurs when
> > > > accessing getServiceParameters().
> > > >
> > > > So, the brief form of the code looks like this:
> > > >
> > > > public class MyPage
> > > > extends BasePage
> > > > implements IExternalPage, PageValidateListener
> > > > {
> > > > public void pageValidate(PageEvent event)
> > > > {
> > > > if (notLoggedIn()) {
> > > > LoginPage page = getLoginPage();
> > > > page.setNextPage(new ExternalCallback(event.getPage(),
> > > > event.getRequestCycle().getServiceParameters());
> > > > throw new PageRedirectException(page);
> > > > }
> > > > }
> > > >
> > > > public void activateExternalPage(Object[] parameters, IRequestCycle
> > > > cycle) {
> > > > cycle.setListenerParameters(parameters);
> > > > log.debug("set listenerParams: " + parameters);
> > > > }
> > > >
> > > > public IPage sampleListener(int someParameter) {
> > > > IPage somePage = getSomePage();
> > > > // do some work
> > > > return somePage;
> > > > }
> > > > }
> > > >
> > > > So, basically, I can't figure out how to get the parameters AND I
> > > > cannot figure out how I would cause the listener to be called after
> > > > the redirect.
> > > >
> > > > Any thoughts?
> > > >
> > > > ---------------------------------------------------------------------
> > > > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > > > For additional commands, e-mail: users-help@tapestry.apache.org
> > > >
> > > >
> > >
> > >
> > > --
> > > Jesse Kuhnert
> > > Tacos/Tapestry, team member/developer
> > >
> > > Open source based consulting work centered around
> > > dojo/tapestry/tacos/hivemind.
> > >
> > >
> >
>
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Re: serviceParameters or listenerParameters both null during validate()!
Posted by Sam Gendler <sg...@ideasculptor.com>.
Judging by the javadoc example in ExternalCallback, if I overlod the
validate() method instead of implementig pageValidateListener, I will
be able to do what i need to do. Is there any reason not to do this,
since validate() doesn't appear to actually be deprecated?
--sam
On 6/20/06, Sam Gendler <sg...@ideasculptor.com> wrote:
> So the entire ExternalCallback/ExternalPage thing is actually entirely
> worthless when it comes to handling something like remembering where
> they were going when they failed to authenticate? That seems odd,
> especially since it is called out as being suitable for exactly that
> in the tapestry pdf book. How are people doing form based
> authentication or is everyone just going to some default page after
> logging in? It seems odd to me that validate() would be called out as
> an adequate place to do authentication/authorization and yet provide
> no way to discover what would have happened if validation succeeded.
>
> Incidentally, how would one execute a listener arbitrarily from
> somewhere? I can see a way to do what I want by using the
> ServletRequest directly, but I'd have to be able to call the listener
> myself.
>
> --sam
>
>
> On 6/20/06, Jesse Kuhnert <jk...@gmail.com> wrote:
> > Not a fun circumstance I'm sure. It's still probably better than getting
> > NPE's.
> >
> > At the point when your pageValidate() method is called I'm not sure if you
> > are in the right "state" to even bother looking for the parameters this way.
> > The majority of requests in Tapestry end up going through the DirectService.
> > http://svn.apache.org/viewvc/tapestry/tapestry4/trunk/framework/src/java/org/apache/tapestry/engine/DirectService.java?view=markup
> >
> > There are two very distinct states that things can be in within this
> > service..Form submissions / listener method invocations is one, page renders
> > are another. If you look at the source of the supplied link you will find
> > that it is very probably that your listener parameters have not even been
> > set yet.
> >
> > Someone else was working on this Callback interface for things. Who was it ?
> > Scott Russel / Ron Piterman ? I can't tell anymore, there are always so many
> > hidden libraries these days.
> >
> > On 6/20/06, Sam Gendler <sg...@ideasculptor.com> wrote:
> > >
> > > I am trying to build an ExternalCallback during my validate method, in
> > > order to return to the same place I was trying to reach when my
> > > session expired. I click on a link which includes query string
> > > parameters courtesy of the parameter included in my listener and the
> > > validate() method fails to authorize the anonymous user, so it builds
> > > an ExternalCallback with parameters cycle.getListenerParameters() as
> > > the array of params, which is always null. The same thing occurs when
> > > accessing getServiceParameters().
> > >
> > > So, the brief form of the code looks like this:
> > >
> > > public class MyPage
> > > extends BasePage
> > > implements IExternalPage, PageValidateListener
> > > {
> > > public void pageValidate(PageEvent event)
> > > {
> > > if (notLoggedIn()) {
> > > LoginPage page = getLoginPage();
> > > page.setNextPage(new ExternalCallback(event.getPage(),
> > > event.getRequestCycle().getServiceParameters());
> > > throw new PageRedirectException(page);
> > > }
> > > }
> > >
> > > public void activateExternalPage(Object[] parameters, IRequestCycle
> > > cycle) {
> > > cycle.setListenerParameters(parameters);
> > > log.debug("set listenerParams: " + parameters);
> > > }
> > >
> > > public IPage sampleListener(int someParameter) {
> > > IPage somePage = getSomePage();
> > > // do some work
> > > return somePage;
> > > }
> > > }
> > >
> > > So, basically, I can't figure out how to get the parameters AND I
> > > cannot figure out how I would cause the listener to be called after
> > > the redirect.
> > >
> > > Any thoughts?
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > > For additional commands, e-mail: users-help@tapestry.apache.org
> > >
> > >
> >
> >
> > --
> > Jesse Kuhnert
> > Tacos/Tapestry, team member/developer
> >
> > Open source based consulting work centered around
> > dojo/tapestry/tacos/hivemind.
> >
> >
>
---------------------------------------------------------------------
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For additional commands, e-mail: users-help@tapestry.apache.org
Re: serviceParameters or listenerParameters both null during validate()!
Posted by Sam Gendler <sg...@ideasculptor.com>.
So the entire ExternalCallback/ExternalPage thing is actually entirely
worthless when it comes to handling something like remembering where
they were going when they failed to authenticate? That seems odd,
especially since it is called out as being suitable for exactly that
in the tapestry pdf book. How are people doing form based
authentication or is everyone just going to some default page after
logging in? It seems odd to me that validate() would be called out as
an adequate place to do authentication/authorization and yet provide
no way to discover what would have happened if validation succeeded.
Incidentally, how would one execute a listener arbitrarily from
somewhere? I can see a way to do what I want by using the
ServletRequest directly, but I'd have to be able to call the listener
myself.
--sam
On 6/20/06, Jesse Kuhnert <jk...@gmail.com> wrote:
> Not a fun circumstance I'm sure. It's still probably better than getting
> NPE's.
>
> At the point when your pageValidate() method is called I'm not sure if you
> are in the right "state" to even bother looking for the parameters this way.
> The majority of requests in Tapestry end up going through the DirectService.
> http://svn.apache.org/viewvc/tapestry/tapestry4/trunk/framework/src/java/org/apache/tapestry/engine/DirectService.java?view=markup
>
> There are two very distinct states that things can be in within this
> service..Form submissions / listener method invocations is one, page renders
> are another. If you look at the source of the supplied link you will find
> that it is very probably that your listener parameters have not even been
> set yet.
>
> Someone else was working on this Callback interface for things. Who was it ?
> Scott Russel / Ron Piterman ? I can't tell anymore, there are always so many
> hidden libraries these days.
>
> On 6/20/06, Sam Gendler <sg...@ideasculptor.com> wrote:
> >
> > I am trying to build an ExternalCallback during my validate method, in
> > order to return to the same place I was trying to reach when my
> > session expired. I click on a link which includes query string
> > parameters courtesy of the parameter included in my listener and the
> > validate() method fails to authorize the anonymous user, so it builds
> > an ExternalCallback with parameters cycle.getListenerParameters() as
> > the array of params, which is always null. The same thing occurs when
> > accessing getServiceParameters().
> >
> > So, the brief form of the code looks like this:
> >
> > public class MyPage
> > extends BasePage
> > implements IExternalPage, PageValidateListener
> > {
> > public void pageValidate(PageEvent event)
> > {
> > if (notLoggedIn()) {
> > LoginPage page = getLoginPage();
> > page.setNextPage(new ExternalCallback(event.getPage(),
> > event.getRequestCycle().getServiceParameters());
> > throw new PageRedirectException(page);
> > }
> > }
> >
> > public void activateExternalPage(Object[] parameters, IRequestCycle
> > cycle) {
> > cycle.setListenerParameters(parameters);
> > log.debug("set listenerParams: " + parameters);
> > }
> >
> > public IPage sampleListener(int someParameter) {
> > IPage somePage = getSomePage();
> > // do some work
> > return somePage;
> > }
> > }
> >
> > So, basically, I can't figure out how to get the parameters AND I
> > cannot figure out how I would cause the listener to be called after
> > the redirect.
> >
> > Any thoughts?
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > For additional commands, e-mail: users-help@tapestry.apache.org
> >
> >
>
>
> --
> Jesse Kuhnert
> Tacos/Tapestry, team member/developer
>
> Open source based consulting work centered around
> dojo/tapestry/tacos/hivemind.
>
>
---------------------------------------------------------------------
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For additional commands, e-mail: users-help@tapestry.apache.org
Re: serviceParameters or listenerParameters both null during validate()!
Posted by Jesse Kuhnert <jk...@gmail.com>.
Not a fun circumstance I'm sure. It's still probably better than getting
NPE's.
At the point when your pageValidate() method is called I'm not sure if you
are in the right "state" to even bother looking for the parameters this way.
The majority of requests in Tapestry end up going through the DirectService.
http://svn.apache.org/viewvc/tapestry/tapestry4/trunk/framework/src/java/org/apache/tapestry/engine/DirectService.java?view=markup
There are two very distinct states that things can be in within this
service..Form submissions / listener method invocations is one, page renders
are another. If you look at the source of the supplied link you will find
that it is very probably that your listener parameters have not even been
set yet.
Someone else was working on this Callback interface for things. Who was it ?
Scott Russel / Ron Piterman ? I can't tell anymore, there are always so many
hidden libraries these days.
On 6/20/06, Sam Gendler <sg...@ideasculptor.com> wrote:
>
> I am trying to build an ExternalCallback during my validate method, in
> order to return to the same place I was trying to reach when my
> session expired. I click on a link which includes query string
> parameters courtesy of the parameter included in my listener and the
> validate() method fails to authorize the anonymous user, so it builds
> an ExternalCallback with parameters cycle.getListenerParameters() as
> the array of params, which is always null. The same thing occurs when
> accessing getServiceParameters().
>
> So, the brief form of the code looks like this:
>
> public class MyPage
> extends BasePage
> implements IExternalPage, PageValidateListener
> {
> public void pageValidate(PageEvent event)
> {
> if (notLoggedIn()) {
> LoginPage page = getLoginPage();
> page.setNextPage(new ExternalCallback(event.getPage(),
> event.getRequestCycle().getServiceParameters());
> throw new PageRedirectException(page);
> }
> }
>
> public void activateExternalPage(Object[] parameters, IRequestCycle
> cycle) {
> cycle.setListenerParameters(parameters);
> log.debug("set listenerParams: " + parameters);
> }
>
> public IPage sampleListener(int someParameter) {
> IPage somePage = getSomePage();
> // do some work
> return somePage;
> }
> }
>
> So, basically, I can't figure out how to get the parameters AND I
> cannot figure out how I would cause the listener to be called after
> the redirect.
>
> Any thoughts?
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> For additional commands, e-mail: users-help@tapestry.apache.org
>
>
--
Jesse Kuhnert
Tacos/Tapestry, team member/developer
Open source based consulting work centered around
dojo/tapestry/tacos/hivemind.