Deploying web applications - jsp generated servlet's may be written over the same file!

Question

Hi, I have made the following test:
Created two simple web applications with one jsp page, and deployed it
with different context names, in weblogic.properties I have:
weblogic.httpd.webApp.weirdApp=\java\weblogic\myserver\weirdApp.war
weblogic.httpd.webApp.weirdAppTwo=\java\weblogic\myserver\weirdAppTwo.war
(Note: I have used two diferent war files, because I have a different
implementation of the jsp page, I could have used the same warfile, and
deployed it two times with the same different names I have used)
These two applications have a jsp named myHomePage.jsp
If I access the first application, like this:
http://myServer:7001/weirdApp/myHomePage.jsp
the servlet for myHomePage is created in
/java/weblogic/myserver/WEB-INF/_tmp_war/jsp_servlet/_myhomepage.class
If I access the second application, like this:
http://myServer:7001/weirdAppTwo/myHomePage.jsp
the servlet for myHomePage is created in
/java/weblogic/myserver/WEB-INF/_tmp_war/jsp_servlet/_myhomepage.class
It overrides the first one! Because the servlets are keeped in memory by
a different class loader this seems to not affect the other servlet, but
I am wondering what may happen with this strange beaver from weblogic!
Bruno Antunes,
Java Software Engineer
email: mailto:[email protected]
Phone: [phone]
Fax : [phone]
WhatEverSoft - Java Center
Centro de Competencia Java
Praca de Alvalade, 6 - Piso 4
1700-036 Lisboa - Portugal
URL: http://www.whatevernet.com
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Answer 1

I have a separate java class that gets my data and returns a Result object. Do you mean java.sql.ResultSet?
In my main servlet I do the following:
request.setAttribute("supporttracker",
supporttracker.findsupporttracker(monthYear));
and then in my JSP I can iterate through the Result
like the following with no problems:
<c:forEach var="supporttracker" begin="0"
items="${supporttracker.rows}" varStatus="counter">
My problem is that I can only iterate through this
once in the page whereas I have no problem doing
multiple forEach loops through other types of
lists/collections such as an ArrayList. Right, because a ResultSet is a database cursor and doesn't act the same way that an ArrayList does. It's more like an InputStream - once you read it, you close it. If you want to re-read it, you have to re-initialize it again.
Iterators behave that way, too. Once you walk through them, you have to re-initialize them.
I've looked
on the web and in a couple of books, I first thought
it may be scope or some attribute in forEach that I
was missing but I'm stumped. It seems like it's
because the pointer to the result set is at the end
of the result set when trying the second iteration,
but I thought by using the begin="0" would put the
pointer at the first row again, on my second
iteration I'm getting no rows/data outputed.
Please help and thanks in advance!The better thing to do is for your method to return a List of objects, one per row, that represent what the ResultSet returns. Have that method iterate through the ResultSet, loading the rows into the List, and close it before you leave in a finally block. A database cursor is a scarce resource, so it's a good idea to close it as soon as you can.
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