jsp, scope, session values

[fa...@UNISERV.de]

Hi,

I'm using tomcat 3.0 with apache 1.3.9 on linux.
I try something like this:

first.jsp
------------

<jsp:useBean id="mybean" scope="page" clas="CheckAddress" />
......
session.putValue("myValue","1");
...
<jsp:forward page="snoop.jsp" />

snoopd.jsp
-----------------
.....
<% String values[]=session.getValueNames();
      for(int i=0;i<values.length;i++)
        String val=(String) session.getValue(values[i]);
....

And it works fine.
But I need my bean's (myBean) lifetime is not just a page, but session. So I
change in first.jsp scope="session". And than I got error:

 Error: 500

Internal Servlet Error:

javax.servlet.ServletException: CheckAddress
        at
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImp
l.java:384)
        at
_0002fsnoop_0002ejspsnoop_jsp_0._jspService(_0002fsnoop_0002ejspsnoop_jsp_0.
java, Compiled Code)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java,
Compiled Code)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled
Code)
        at
org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspServlet.ja
va, Compiled Code)
        at
org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java,
Compiled Code)
        at org.apache.jasper.runtime.JspServlet.service(JspServlet.java,
Compiled Code)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled
Code)
        at
org.apache.tomcat.core.ServiceInvocationHandler.method(ServletWrapper.java,
Compiled Code)
        at
org.apache.tomcat.core.ServletWrapper.handleInvocation(ServletWrapper.java,
Compiled Code)
        at
org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java,
Compiled Code)
        at
org.apache.tomcat.core.RequestDispatcherImpl.forward(RequestDispatcherImpl.j
ava, Compiled Code)
        at
org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java,
Compiled Code)
        at
_0002faddress_0002ejspaddress_jsp_1._jspService(_0002faddress_0002ejspaddres
s_jsp_1.java:299)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java,
Compiled Code)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled
Code)
        at
org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspServlet.ja
va, Compiled Code)
        at
org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java,
Compiled Code)
        at org.apache.jasper.runtime.JspServlet.service(JspServlet.java,
Compiled Code)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled
Code)
        at
org.apache.tomcat.core.ServiceInvocationHandler.method(ServletWrapper.java,
Compiled Code)
        at
org.apache.tomcat.core.ServletWrapper.handleInvocation(ServletWrapper.java,
Compiled Code)
        at
org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java,
Compiled Code)
        at org.apache.tomcat.core.Context.handleRequest(Context.java,
Compiled Code)
        at
org.apache.tomcat.core.ContextManager.service(ContextManager.java, Compiled
Code)
        at
org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection
(Ajp12ConnectionHandler.java, Compiled Code)
        at
org.apache.tomcat.service.TcpConnectionThread.run(TcpEndpoint.java, Compiled
Code)
        at java.lang.Thread.run(Thread.java, Compiled Code)

Root cause: 

java.lang.ClassCastException: CheckAddress
        at
_0002fsnoop_0002ejspsnoop_jsp_0._jspService(_0002fsnoop_0002ejspsnoop_jsp_0.
java, Compiled Code)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java,
Compiled Code)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled
Code)
        at
org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspServlet.ja
va, Compiled Code)
        at
org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java,
Compiled Code)
        at org.apache.jasper.runtime.JspServlet.service(JspServlet.java,
Compiled Code)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled
Code)
        at
org.apache.tomcat.core.ServiceInvocationHandler.method(ServletWrapper.java,
Compiled Code)
        at
org.apache.tomcat.core.ServletWrapper.handleInvocation(ServletWrapper.java,
Compiled Code)
        at
org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java,
Compiled Code)
        at
org.apache.tomcat.core.RequestDispatcherImpl.forward(RequestDispatcherImpl.j
ava, Compiled Code)
        at
org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java,
Compiled Code)
        at
_0002faddress_0002ejspaddress_jsp_1._jspService(_0002faddress_0002ejspaddres
s_jsp_1.java:299)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java,
Compiled Code)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled
Code)
        at
org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspServlet.ja
va, Compiled Code)
        at
org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java,
Compiled Code)
        at org.apache.jasper.runtime.JspServlet.service(JspServlet.java,
Compiled Code)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled
Code)
        at
org.apache.tomcat.core.ServiceInvocationHandler.method(ServletWrapper.java,
Compiled Code)
        at
org.apache.tomcat.core.ServletWrapper.handleInvocation(ServletWrapper.java,
Compiled Code)
        at
org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.java,
Compiled Code)
        at org.apache.tomcat.core.Context.handleRequest(Context.java,
Compiled Code)
        at
org.apache.tomcat.core.ContextManager.service(ContextManager.java, Compiled
Code)
        at
org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection
(Ajp12ConnectionHandler.java, Compiled Code)
        at
org.apache.tomcat.service.TcpConnectionThread.run(TcpEndpoint.java, Compiled
Code)
        at java.lang.Thread.run(Thread.java, Compiled Code)


What am I doing wrong??


Regards,
Fadila Mumbasic