Correction - I changed the scope to session and the error messages DO
appear, so that is ok.
But this caused a never ending loop in Retry.jsp and control never gets
forwarded to Verify.jsp. And my code for populating the select boxes does
not do what it should (should repopulate if there was an error or default to
selected option if one was selected - now this is successful in the first
retry, but after that it defaults to the first entry and does not list the
rest.
Now I am also getting some errors in catalina.out:
Jan 7, 2003 9:42:59 PM org.apache.jk.server.JkCoyoteHandler action
SEVERE: Error in action code
java.lang.NullPointerException
at
org.apache.jk.server.JkCoyoteHandler.action(JkCoyoteHandler.java:386)
at org.apache.coyote.Response.action(Response.java:222)
at
org.apache.coyote.tomcat4.CoyoteAdapter.postParseRequest(CoyoteAdapter.java:
310)
at
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:221)
at
org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:261)
at
org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:360)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:632)
at
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:590)
at
org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:707)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav
a:530)
at java.lang.Thread.run(Thread.java:536)
The log code that I had placed before just shows a loop:
2003-01-07 21:42:41 jsp: Entering CCProcess
2003-01-07 21:42:41 jsp: Error on form - forwarding to Retry.jsp
2003-01-07 21:42:41 jsp: Entering Retry.jsp - error on form
2003-01-07 21:42:51 jsp: Entering CCProcess
2003-01-07 21:42:51 jsp: Error on form - forwarding to Retry.jsp
2003-01-07 21:42:51 jsp: Entering Retry.jsp - error on form
I changed the scope back to request.jsp and I get to Verify.jsp, but the
error message in catalina.out is still there. What could be causing this?
And why would changing the scope to session cause me to enter into that
Retry.jsp loop?
Thanks!
Denise
-----Original Message-----
From: Denise Mangano [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, January 07, 2003 9:41 PM
To: 'Tomcat Users List'
Subject: RE: Java Bean Scope questions (a lengthy one)
Wow someone read all of that!! ;)
For Question #1: I should have mentioned this before... I tried to use
session scope at one point (don't recall the exact reason but I thought of
it as an attempt to resolve a different problem). When I set the scope to
session, it caused problems with my form validation. Currently if the form
is not validated, the user is brought back to Retry.jsp and error messages
appear next to the offending input field. When I used session scope,
Retry.jsp would be reloaded, but the error messages would not be
displayed... Any thoughts on that? I am going to go back and attempt this
again now that everything is working as it should up to Verify.jsp and see
if I stand corrected...
For Question #2 - that's exactly what I needed to know!!
For Question #3 - hopefully I can get the session scope to work, but then
how would I program that button? Would I just put onClick="Retry.jsp" ?
Tim, thank you so much for taking the time!!
Denise :)
-----Original Message-----
From: Tim Moore [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, January 07, 2003 9:24 PM
To: Tomcat Users List
Subject: RE: Java Bean Scope questions (a lengthy one)
> -----Original Message-----
> From: Denise Mangano [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, January 07, 2003 9:19 PM
> To: 'Tomcat Users List'
> Subject: Java Bean Scope questions (a lengthy one)
>
>
> Question #1: Why does CCSubmit.jsp not have access to formBean
> properties. I am thinking this is because technically by submitting a
> form with an action of "CCSubmit.jsp" control isn't being forwarded to
> CCSubmit.jsp so the instance of formBean isn't forwarded. The scope
> of formBean is request. Is that the correct scope to use? **I need to
> have access to formBean properties from the moment it is instantiated
> to the moment the application has completed, but it has to be unique
> to each user of the
> webapp.** How
> could I accomplish this?
That's exactly what session scope is for. :-) Request scope means that the
bean is gone at the end of the request (that is, when Verify.jsp finishes
rendering). If you put it in session scope you'll be set.
> Question #2: Is it possible to use two beans within a single jsp page?
> I would imagine that it is, and if so I believe once I gain access to
> formBean properties, my transaction properties will no longer be null.
> (I included some code below... is this legal?)
Absolutely! As long as they have different id attributes, you can use as
many beans as you like.
> Question #3: I include a button to give the option to go back and
> make changes. If the user should desire to go back and make changes,
> control should be forwarded to Retry.jsp on button click. I need to
> program this button in a way so that when Retry.jsp is recalled it
> will still have access to formBean properties.How do I program this?
> My last attempt using <jsp:forward> cause Retry.jsp to load
> automatically when Verify.jsp was loaded (sorry again Noel ;) ).
As long as the bean is in session scope, you'll be able to access it from
any page the user accesses.
--
Tim Moore / Blackboard Inc. / Software Engineer
1899 L Street, NW / 5th Floor / Washington, DC 20036
Phone 202-463-4860 ext. 258 / Fax 202-463-4863
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