Thank you Gerhard
Ok for you to know more my scenary :)
1- All the JSPs need to verify is the user is in session (not the login JSP
obviously)
2- All my beans extends from a base bean, so I can have methods in it that
all the beans can call, lets say that in all my beans the only thing I need
to do is: if(*userInSession(....)*) where userInSession is one method is in
the BaseBean
Ok, about the two solutions that I see that can work in my case:
1-
BaseBean
userInSession(context){
context.getApplication().getNavigationHandler().
handleNavigation(FacesContext.getCurrentInstance(),null,"*
showLoggin*");
}
All the Beans on their init methods
init()
{
if(userInSession){
do the load of the controls
}else{
userInSession(FacesContext.getCurrentInstance())
}
}
The problem with this solution, is that it doesn´t work :( when I call the
handleNavigation nothing happens, the third argument is the navigation rule
in the faces-config right? Why it doesn´t work. Can you help me with this
2-
Even do I need a simple solution and the 1 solutions will work for me, I'm
intersting, and I in the central/generic solution, do you have an example
code where I can see this kind of solution.
Thanks!!!
On Dec 5, 2007 6:30 PM, Gerhard Petracek <[EMAIL PROTECTED]> wrote:
> hello,
>
> there is no need to use shale to implement a login scenario with jsf -
> it's just one among many possibilities...
> concerning your question about navigation rules (within faces-config.xml)
> to implement a login-scenario:
> in my opinion: don't use such an approach - in such a case you have to
> check permissions manually (scattered over the source code/pages).
> you already mentioned an example (the if-statement), which demonstrates
> what i'm talking about (in my opinion these if-statements - scattered over
> the source code/pages - aren't handy - if you use them - you normally use
> them very frequently -> it isn't a central/generic solution)...
> - there are some details i didn't mention - just to have a short (&
> subjective) answer :)
> -> i prefer a central/generic solution!
>
> in view of examples:
> there are really a lot of possibilities to implement such a login
> functionality... -> your choice depends on your situation/requirements...
> -> there is no ultimate solution -> there are many solutions -> i'm
> confident that there are some examples...
> e.g. - as i already mentioned: there are also "jsf independent" security
> extensions such as acegi.
>
> i already provided the second link you mentioned + i've already commented
> it.
> in view of my previous answers: are there other open questions?
> if there are further questions, you are welcome to ask them!!!
>
> regards,
> gerhard
>
>
>
> 2007/12/5, daniel ccss <[EMAIL PROTECTED]>:
>
> > I found two others links that can help to my question
> >
> > http://www.gorerle.com/vlab-wiki/index.php?title=JSF
> >
> > http://www.jsftutorials.net/jsfNavigation/jsf-login-navigation-redirect.html
> >
> > But I don´t think that they were clear, even the second link have a note
> > that says:
> >
> > *Note: This is only an example that shows how you can use navigation
> > handler decorator. Do NOT use it as a ready-to-use solution for login
> > facility. Use Phase Listener instead.*
> >
> > I will search for a Phase Listener example, but still is not clear which
> > is the better solution and how to implemented it.
> >
> > Thanks!
> >
> > On Dec 5, 2007 11:10 AM, daniel ccss < [EMAIL PROTECTED]> wrote:
> >
> > > Thanks Both of you, i was out for a while.
> > >
> > > Ok I think this is a common question, and not a simple question as I
> > > wrote in my subject, something similar was talked in this thread:
> > >
> > >
> > > http://forum.java.sun.com/thread.jspa?threadID=690288&messageID=4017603
> > >
> > > I think the NavigationHandler is the easier and nice solution, but I
> > > have some questions about it beacause I implemented it but nothing
> > > happens:
> > >
> > >
> > > init()
> > > {
> > > if(userInSession){
> > > do the load of the controls
> > > }else{
> > > FacesContext.getCurrentInstance
> > > ().getApplication().getNavigationHandler().
> > > handleNavigation(FacesContext.getCurrentInstance
> > > (),null,"*showLoggin*");
> > >
> > > }
> > > }
> > >
> > >
> > > 1- Is necesary to use shale-view?
> > > 2- The third argument is a navigation rule that is in the
> > > faces-config.xml??
> > > 3- Can anyone give a sample code of how to do this? I think its not
> > > clear how to handdle this, and many people will use it if is clear :).
> > >
> > >
> > > Thanks
> > >
> > >
> > > On Nov 23, 2007 11:40 PM, Gerhard Petracek <
> > > [EMAIL PROTECTED]> wrote:
> > >
> > > > one more supplement to complete the picture of the last two mails -
> > > > i missed to add these details at my last mail *sorry* for that...
> > > >
> > > > in my previous mail i wrote that the NavigationHandler approach
> > > > doesn't solve your problem, because the init-method gets invoked
> > > > before. i
> > > > missed to add some details to complete this comment because of quick
> > > > answering. normally it works very well if you navigate to the login page
> > > > before you use the bean - which is the case if you use the whole bean
> > > > only
> > > > within your target page(s) (where a successful login is required) (->
> > > > the
> > > > init-method isn't invoked if you navigate to the login page) -> it's a
> > > > valid
> > > > approach as i mentioned it in my first mail.
> > > >
> > > > (i thought about possible scenarios where you have a combination of:
> > > > a login isn't required for all pages - as it seems to be the case
> > > > within our
> > > > application - and if you use the bean before the NavigationHandler gets
> > > > invoked - and the user hasn't logged in -> in such a special case the
> > > > init-method recognizes that the user isn't logged in but the navigation
> > > > to
> > > > the login page occurs later. i don't know your implementation details
> > > > and if
> > > > such a scenario would lead to a side effect within your implementation
> > > > or
> > > > not - so i skip details here.)
> > > >
> > > > summarized: also the NavigationHandler approach works for common
> > > > cases (e.g. there is no problem if you navigate to the login page
> > > > before you have the chance to use the bean) - in that case it also fits
> > > > into
> > > > my summary of the first mail.
> > > >
> > > >
> > > > regards,
> > > > gerhard
> > > >
> > > >
> > > >
> > > > 2007/11/24, Gerhard Petracek < [EMAIL PROTECTED]>:
> > > > >
> > > > > hello daniel,
> > > > >
> > > > > some additional information:
> > > > > just to avoid misunderstandings - the summary of the suggestion
> > > > > has no reference to the NavigationHandler approach because in that
> > > > > case your
> > > > > init-method would get executed before.
> > > > >
> > > > > generally spoken: to implement a custom NavigationHandler is just
> > > > > an alternative approach (in your case it doesn't solve your problem).
> > > > > if someone is interested in this approach you will find an example
> > > > > at:
> > > > > http://www.jsftutorials.net/jsfNavigation/jsf-login-navigation-redirect.html
> > > > >
> > > > > (i didn't look at the details of this specific solution - it's
> > > > > just an example... - and they also suggest to use a PhaseListener)
> > > > >
> > > > > regards,
> > > > > gerhard
> > > > >
> > > > >
> > > > >
> > > > > 2007/11/24, Gerhard Petracek < [EMAIL PROTECTED]>:
> > > > > >
> > > > > > hello daniel,
> > > > > >
> > > > > > i would like to suggest other solutions.
> > > > > >
> > > > > > i think you are familiar with the common ways of handling
> > > > > > navigation
> > > > > > (summarized - e.g. if you use the "from-outcome" approach an
> > > > > > action-method returns the outcome or you use a static string within
> > > > > > your
> > > > > > page - with this approach only these outcomes are used for
> > > > > > navigation)
> > > > > > -> if your "init"-method is not an action method (it doesn't
> > > > > > sound like one) - you should consider alternative solutions.
> > > > > >
> > > > > > --- just a general information before we start ---
> > > > > > with this additional information i don't refer to the solution
> > > > > > you are having in mind!
> > > > > > basically you can manually navigate e.g. with:
> > > > > >
> > > > > > FacesContext.getCurrentInstance().getApplication().getNavigationHandler().handleNavigation(
> > > > > > ... );
> > > > > > or with:
> > > > > >
> > > > > > FacesContext.getCurrentInstance().getExternalContext().redirect(
> > > > > > ... );
> > > > > >
> > > > > > however, be careful with these mechanisms - they don't work at
> > > > > > any point of your application and you risk to "break" your
> > > > > > application if
> > > > > > you misuse these mechanisms.
> > > > > > ---
> > > > > >
> > > > > > if you don't like to use security extensions such as Acegi you
> > > > > > have to implement custom mechanisms to provide login pages and to
> > > > > > avoid
> > > > > > initial actions within your bean. in that case i would suggest more
> > > > > > generic
> > > > > > solutions - e.g. a custom PhaseListener or a custom
> > > > > > NavigationHandler.
> > > > > >
> > > > > > to summarize my suggestion: use/implement a mechanism which
> > > > > > takes place before your init-method gets executed.
> > > > > >
> > > > > > regards,
> > > > > > gerhard
> > > > > >
> > > > > >
> > > > > >
> > > > > > 2007/11/23, daniel ccss <[EMAIL PROTECTED]>:
> > > > > > >
> > > > > > > I have a simple question
> > > > > > >
> > > > > > > I have been working with myfaces-tomahawk for 6 months, great,
> > > > > > > but I
> > > > > > > have a question, how to call an 'action' from the backing
> > > > > > > bean, until
> > > > > > > today I have called all my action methods from the JSP page,
> > > > > > > on the
> > > > > > > onClick, onChange, etc events, but now I need to call an
> > > > > > > action from
> > > > > > > another method in my backing bean.
> > > > > > >
> > > > > > > I have an init method in my backing bean that ask if the user
> > > > > > > is in
> > > > > > > session, if yes all the load of the combos etc is make, if not
> > > > > > > I need
> > > > > > > to call a method that returns to the login page by returning
> > > > > > > the
> > > > > > > navigation rule like this:
> > > > > > >
> > > > > > > //init
> > > > > > > {
> > > > > > > if(userInSession){
> > > > > > > do the load of the controls
> > > > > > > }else{
> > > > > > > returnToLogin();
> > > > > > > }
> > > > > > > }
> > > > > > >
> > > > > > > private String returnToLogin(){
> > > > > > > return "login";
> > > > > > > }
> > > > > > >
> > > > > > > and in faces-config.xml i have the navigation rule:
> > > > > > >
> > > > > > > <navigation-rule>
> > > > > > > <from-view-id>....
> > > > > > >
> > > > > > > <navigation-case>
> > > > > > > <from-outcome>login</from-outcome>
> > > > > > > <to-view-id>/JSP/Login.jsp</to-view-id>
> > > > > > > </navigation-case>
> > > > > > > ....
> > > > > > >
> > > > > > > But nothing happens, this type of call can be done?, or only I
> > > > > > > can
> > > > > > > call an action that returns to a navigation rule from the JSP,
> > > > > > > if so,
> > > > > > > how can I send the person to the login page in case he copy
> > > > > > > the url in
> > > > > > > the browser and never pass for the login page.
> > > > > > >
> > > > > > > Thanks all
> > > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > --
> > > > > >
> > > > > > http://www.irian.at
> > > > > >
> > > > > > Your JSF powerhouse -
> > > > > > JSF Consulting, Development and
> > > > > > Courses in English and German
> > > > > >
> > > > > > Professional Support for Apache MyFaces
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > --
> > > > >
> > > > > http://www.irian.at
> > > > >
> > > > > Your JSF powerhouse -
> > > > > JSF Consulting, Development and
> > > > > Courses in English and German
> > > > >
> > > > > Professional Support for Apache MyFaces
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > >
> > > > http://www.irian.at
> > > >
> > > > Your JSF powerhouse -
> > > > JSF Consulting, Development and
> > > > Courses in English and German
> > > >
> > > > Professional Support for Apache MyFaces
> > > >
> > >
> > >
> >
>
>
> --
>
> http://www.irian.at
>
> Your JSF powerhouse -
> JSF Consulting, Development and
> Courses in English and German
>
> Professional Support for Apache MyFaces
>
