Java Servlet Lifecycle .

What about Servlets and Lifecycle?

• When a Servlet is deployed to a Web server or Application server and needed for a service, the Servlet-contain in the server will load and instantiate the Servlet.
• The Servlet-contain will then call the HttpServlet object init() method and stay ready for service of any client request.
• As soon as a request for the servlet comes the Servlet-container will call the HttpServlet object service() method.
• Through the HttpServlet object service() the Servlet-Container will call the correct doXXX method depending on the Request type (GET, POST ...).
• Then the Servlet programmer code will be executed in a new Thread and the Servlet goes back to ready state waiting for a new request.
• If there is no request to handle and a server-defined timeout is reached the Servlet-container calls the HttpServlet object destroy() method and removes the servlet from the container.