CODEWITHSUNDEEP
javajsp
Oded
Oded

Reputation: 664

jsp globals and parameters scope

i am really new to java, and jsp. so it is understandable that i cant really understand the scope of parameters here is my code:

<%@page contentType="text/html" pageEncoding="UTF-8" %>
<%!
     String sRony= new String();
     void func() {
        sRony += " - add in func() - ";
    }
%>
<%
     if (request.getParameter("ron")!= null){
         sRony = request.getParameter("ron");
         func();
     }
     if (request.getParameter("sleep")!= null){
        Thread.sleep(2000);
     }

%>
<html>
<head>
</head>
<body>
  <%=sRony%><%= new java.util.Date() %>
</body>
</html>

the problem is that this code is not thread safe. if you'll surf to 

page.jsp?ron=sleep&sleep=1

and at the same time to 

page.jsp?ron=no_sleep

both page will print the "no_sleep", cause the parameter sRony is global. if i'll remove the ! from <%! the parameter sRony will not be recognized inside void func() i cant figure out how can i declare a parameter that will be per request, and will have the scope inside my function. not sure if my platform is important information, i am working on redhat 5.5 64 bit, glassfish server 3. any help ?

Upvotes: 0

Views: 257

Answers (1)

Jigar Joshi
Jigar Joshi

Reputation: 240860

use pagescope and use JSTL instead javacode

<c:set var="name1" value="value1" scope="page" />

Upvotes: 1

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