Problem displaying an error message

Question

I'm having a trouble displaying text stored in a session scope variable, and I'll try to explain this here with a small example. ps: I'm using IBM's RAD (Eclipse Enhanced IDE) to develop JSF.
Let's just say I take the following steps:
1 - I create a new Dynamic Web Project Called Test
2 - I add a new Faces JSP File called index.jsp (into WebContent folder of
course)
3 - I add a command button to the page (using the extended
hx:commandExButton tag, inside a form and, inside a scriptcollector,
this is all added automatically)
4 - I add an output text component to the page (outside the form but still
inside the scriptcollector tag, and visually below the button)
5 - I add a new java.lang.String Session Scope Variable called test
6 - I add to the command button tag the atribute action with the value
"#{pc_Index.proceedAction}"
7 - I check faces-config.xml for the correct mapping between pc_Index and
the Index.jsp backing bean
8 - I create a new method in the corresponding pagecode file (backing
bean) - public void proceedAction () - with only one line:
getSessionScope().put("test","xpto");
which should put the String object "xpto" into the test variable
9 - I drag and drop the test variable to the outputText in the IDE (i believe all
it does is to add value="#{sessionScope.test}" to outputText tag)
And everything runs ok, the message is displayed when the button is clicked, just as I wanted. The thing is, I have a slightly more complex application in JSF on which I can't make this work.
Basicly i have radio buttons and different destinies upon click of a "next" button. And an error message in an output field should be displayed when no radio button is selected, since the page remains the same. but I can't make the message appear, it only appears when I click "Previous" on another page to get back to the first one. Then the message magicly appears (and it shouldn't even appear those times...)
Any ideas? Any help would be most apreciated, thanks.

Answer 1

I'm having a trouble displaying text stored in a session scope variable, and I'll try to explain this here with a small example. ps: I'm using IBM's RAD (Eclipse Enhanced IDE) to develop JSF.
Let's just say I take the following steps:
1 - I create a new Dynamic Web Project Called Test
2 - I add a new Faces JSP File called index.jsp (into WebContent folder of
course)
3 - I add a command button to the page (using the extended
hx:commandExButton tag, inside a form and, inside a scriptcollector,
this is all added automatically)
4 - I add an output text component to the page (outside the form but still
inside the scriptcollector tag, and visually below the button)
5 - I add a new java.lang.String Session Scope Variable called test
6 - I add to the command button tag the atribute action with the value
"#{pc_Index.proceedAction}"
7 - I check faces-config.xml for the correct mapping between pc_Index and
the Index.jsp backing bean
8 - I create a new method in the corresponding pagecode file (backing
bean) - public void proceedAction () - with only one line:
getSessionScope().put("test","xpto");
which should put the String object "xpto" into the test variable
9 - I drag and drop the test variable to the outputText in the IDE (i believe all
it does is to add value="#{sessionScope.test}" to outputText tag)
And everything runs ok, the message is displayed when the button is clicked, just as I wanted. The thing is, I have a slightly more complex application in JSF on which I can't make this work.
Basicly i have radio buttons and different destinies upon click of a "next" button. And an error message in an output field should be displayed when no radio button is selected, since the page remains the same. but I can't make the message appear, it only appears when I click "Previous" on another page to get back to the first one. Then the message magicly appears (and it shouldn't even appear those times...)
Any ideas? Any help would be most apreciated, thanks.