Servlet Notes 04:servlet life cycle

1. When the servlet is called for the first time, it triggers the init function, which loads the servlet into memory. The INIT function will only be called once

2. Call the service function

3. The service function is called directly by any request that calls the servlet thereafter

4. When this web app reload or shuts down, the Destory function is called to destroy the servlet

On a Web server, when a servlet application is first accessed and the Init function is called, the servlet persists in memory and serves all users.

This means that all users use the same servlet.

The servlet is singleton and the thread is unsafe.