Catch event when Application Server is shutdown

Question

Hi All,
Actually I want to catch an event do something when weblogic server is shutdown.
How can I catch the event.
Any help would be highly appreciated.
I tried by implementing ServletContextListener interface, but in that I can only catch the event when weblogic is started, but not when it is shutdown.

Answer 1

Create a class that implements the ServletContextListener interface:
     public class myServletContextListener implements ServletContextListener
The ServletContextListener interface has two methods that must be implemented:
     public void contextInitialized(ServletContextEvent sce)
     public void contextDestoyed(ServletContextEvent sce)
Register the listener in the web.xml:
     <web-app>
          <context-param>
               <param-name>param1</param-name>
               <param-value>paramValue1<param-value>
          </context-param>
          <listener>
                                                 <listener-class>
                                                            com.listeners.MyServletContextAttributeListener
                 </listener-class>
          </listener>
          <servlet>
               <servlet-name>test</servlet-name>
               <servlet-class>com.test</servlet-class>
               <init-param>
                    <param-name>param1</param-name>
                    <param-value>paramValue1</param-value>
               </init-param>
               <load-on-startup>1</load-on-startup>
          </servlet>
          <servlet-mapping>
               <servlet-name>test</servlet-name>
               <url-pattern>/test</url-pattern>
          </servlet-mapping>
     </web-app>When the server starts up the servlet context (usually on server start up) it will call the contextInitialized method of your myServletContextListener class. When the server shuts down the servlet context (usually on server shutdown) it will call the contextDestroyed method of your myServletContextListener class.
With in these methods you can usually assume that the server is starting/stopping and do what it is you wish to do.
However there are two things to bear in mind:
1- Most servers offer a manager app that allows individual servlet contexts to be stopped/started without shutting down the server o you may get false results depending on you is managing the server.
2- I am not sure if the methods will be called if the server suffers a catastrophic error and crashes. For example a out of memory error. So you may miss a server shut down but the error should be logged in the tomcat log files.