R separate personalization classes reqd 4 jsps managed by servlet portlet?

My portlet is a servlet which manages multiple jsps. This servlet manages the session data as well as navigation between the pages. At the moment, I have separate personalization classes for each of the jsps. Each personalization class extends NameValuePersonalizationObject. The content on each of the jsps has to be managed within the portal.
Do I need to have separate personalization classses or is it better to have one personalization class for all the jsps within my portlet ?
Any help would be great, Thanks,
Tara

Hi,
After going through your application scenario, i think you should use just one Personalization Class. A single class would suffice all the four JSPs.
But, as you might be aware, a Preference Store can only store basic data types like String, boolean etc. Complex Data Types like Properties etc. cannot be stored directly using NameValuePersonalizationObject. If you are storing complex types, then you will have to extend this class & define methods to store & fetch data from this complex object into the Personalization Store.
You might want to go through the following article which talks about Information Storage using Web Providers.
http://portalstudio.oracle.com/pls/ops/docs/FOLDER/COMMUNITY/PDK/articles/overview.information.storage.html
If there are any further issues, please get back.
Regards,
Abhinav

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at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:293)
at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:353)
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at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:473)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:190)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:432)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:356)
at ConfigurationServlet.service(ConfigurationServlet.java:80)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Thread.java:536)
then I put in this code:
<%@page import="GetInfo.*"%>
<jsp:useBean id="info" class="GetInfo" />
<%info.SetElement("VISUAL");
info.startXML();
String Visual = info.ReturnVISUAL();%>
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org.apache.jasper.JasperException: /Configuration.jsp(19,21) equal symbol expected
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:94)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:428)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:126)
at org.apache.jasper.compiler.Parser.parseAttribute(Parser.java:169)
at org.apache.jasper.compiler.Parser.parseAttributes(Parser.java:136)
at org.apache.jasper.compiler.Parser.parseAttributes(Parser.java:149)
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at org.apache.jasper.compiler.ParserController.parse(ParserController.java:173)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:153)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:227)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:369)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:473)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:190)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:432)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:356)
at ConfigurationServlet.service(ConfigurationServlet.java:114)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
at java.lang.Thread.run(Thread.java:536)

Okay, Tomcat doesn't like it when you don't use packages in the WEB-INF/classes folder, don't ask me why, it's just the way it is.
Rewrite your class so it exists in a package:package myclasses;
public class GetInfo { ... }Compile it and put it in the WEB-INF/classes directory so you should have:
WEB-INF/classes/myclasses/GetInfo.class
Your import statement should be:<%@ page import="myclasses.GetInfo" %>and continue coding as before.
Let me know how it goes.
Anthony

How to reference a DatabaseHandler servlet class from a jsp file in Tomcat

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HTTP Status 500 -
type Exception report
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location: class org.apache.jsp.ValidateLogon_jsp
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^

Just like in the class file you need to import any classes that you want to access in the JSP.
http://java.sun.com/products/jsp/tags/11/syntaxref11.fm7.html

Importing classes into a jsp

I have created a class file called BindListener.java and put it in my root directory in my web module. I cannot however get the import statement for the jsp right, my root directory is called JBuilder. I have tried putting it in the WEB-INF classes folder also but still when I try to execute thr jsp it dosent work.
There is no package declared in the classs file and it does not extend any other class, however it implements the HttpSessionBindingListener interface.
I can call servlets from my JSP in the WEB-INF classes dir using /JBuilder/ServletName
I am mondo confused please help

I have created a class file called BindListener.java
and put it in my root directory in my web module. I
cannot however get the import statement for the jsp
right, my root directory is called JBuilder. I have
tried putting it in the WEB-INF classes folder also
but still when I try to execute thr jsp it dosent
work.
There is no package declared in the classs file and
it does not extend any other class, however it
implements the HttpSessionBindingListener interface.You have to put the class in a package, then put the .class file in a package directory under WEB-INF/classes. So for example:
package beans;
public class BindListener ...
//goes into this directory structure
<APP_ROOT>/
*.jsp
WEB-INF/
    web.xml
    classes/
      beans/
        BindListener.class
//And is imported into your JSP using one of the following
// -- EITHER --
<%@ page import="beans.BindListener" %>
<%
BindListener bl = new BindListener();
%>
// -- OR --
<jsp:useBean id="bl" class="beans.BindingListener"/>>
I can call servlets from my JSP in the WEB-INF
classes dir using /JBuilder/ServletName
I am mondo confused please help

Using class method in JSP

Is it possible to use method from ordinary .class file in jsp file?
If it is, please explain.

org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
     org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:332)
     org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:412)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

How to instantiate a .class from a JSP?

Hi,
probably it's a simple problem, byt I'm new in JSP and I couldn't work it out.
I'm converting a SSJS Netscape Application to JSP. My needing is to write a Java .class containing only static methods, to call them from the JSP pages.
For trying, I wrote a simple class that I call from a JSP page, but I get this error:
Error: 500
Location: /JSP24H/cap01/Simple2.jsp
Internal Servlet Error:
org.apache.jasper.JasperException: Unable to compile class for
JSPC:\tomcat\work\localhost_8080%2FJSP24H\_0002fcap_00030_00031_0002fSimple_00032_0002ejspSimple2_jsp_0.java:80:
Incompatible type for =. Can't convert void to java.lang.String.
v = GenFunction.messaggio();
^
This is the JSP instantiating the Java class:
<HTML>
<HEAD><TITLE>A Simple JSP</TITLE></HEAD>
<BODY>
<FONT COLOR="blue" FACE="Trebuchet">
<CENTER>
<%@ page import = "GenFunction" %>
<% out.println("My name is Charly !" + "<br>"); %>
<%
String v = " ";
v = GenFunction.messaggio();
out.println( v );
%>
</CENTER>
</FONT>
</BODY>
</HTML>
And this is the class instantiated from JSP:
public class GenFunction {
public static void main (String args[]) {
public static String messaggio() {
String a;
a = " Hello world !";
return a;
In order to be sure about what I'm doing, I opened a DOS window and I called the class within the following:
public class call_Class {
public static void main (String args[])
String v;
GenFunction x = new GenFunction();
v = x.messaggio();
System.out.println(v);
When I instantiate the class from DOS it's all right, why not from JSP. It seems to be returning a void value (I tried with casting too but without success).
Thanks !

Do you have multiple versions of classes in the server CLASSPATH somehwhere? If you have changed the class, and not bounced the server, try bouncing the server(may be using cached class)
-Mak

R separate personalization classes reqd 4 jsps managed by servlet portlet?

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