context variable in action servlet

[jacob deiter]

My application is based on struts 1.2 and spring.I have a context variable ctx which is to be initialized when application starts and used in all action class.For that, context variable is to be declared in Action servlet and used in all action
[ July 04, 2008: Message edited by: jacob deiter ]

[Siddharth Naik]

Initialize context attributes in ServletContextListener and not in any action class. During initialization of servlet context attributes, you can use context parameters specified in web.xml

[jacob deiter]

Thanks for reply.Could you please some pseudo code

[jacob deiter]

Originally posted by jacob deiter:
Thanks for reply.Could you please give some pseudo code

[Siddharth Naik]

   
 
package sys;
 
import javax.servlet.*;
 
public class MyContextListener implements ServletContextListener {

public void contextInitialized (ServletContextEvent event){
ServletContext sc = event.getServletContext();
//Get context parameters if any defined in web.xml
String dbURL = sc.getInitParameter("dbURL");
//Set servlet context attributes available to entire application 
//Example: datasource
sc.setAttribute("con", "thisCanBeAnyObject");
//More code
}

public void contextDestroyed(ServletContextEvent event){
ServletContext sc = event.getServletContext();
//clean up code if any
//Example: closing db connection
}
 
}
 

[Siddharth Naik]

Oh and don't forget to register your listener in web.xml

    
<listener>
<listener-class>
sys.MyContextListener
</listener-class>
</listener>

[jacob deiter]

In my application business service contain only business logic.It never contain session object and other stuff.It may fit into standalone application also.What ever input given to business layer ,thru its input parameter only.So i have pass the context variable in every method.If it so ,why I have to do the pass the again and again.Is there any good approach

Thanks in advance