Returns A String Containing Information About the Servlet Such as it’s Authors, Version & Copyright.

1. NADAR SARASWATHI
COLLEGE OF ARTS AND
SCIENCE
DEPARTMENTOF COMPUTERSCIENCE
BY
K.DIANA DEVI
I M.SC(CS)

2. Servlet life cycle
Generic Servlet

3. Road Map
Over view of the life cycle
Birth of a servlet
Life of a servlet
Death of a servlet

4. Over view of
servleT life cycle

5. Life of a servlet
 Birth: Create and Intialize the Servlet
 Important method: Init()
 Life: Handle 0 Or more Client Request
 Important method: Service()
 Death: Destroy the Servlet
 Important method: Destroy ()

6. Birth Of A
Servlet

7. The init() MethoD
 The Init () Method Is Called When The Servlet Is First Request
By A Browser Request
 It Is Not Called Again For Each Request
 Used For One Time Initialization

8. Life of a
Servlet

9. Life of a servlet
 The First Time A Servlet Is Called The Servlet
Is Instantiated And It’s Init() Method is called
 Only One Instance Of The Servlet Is Instantiated
 This One Instance Handles All Browser Requests

10. Service Method
 Each Time The Servlet Receives A Request For A Servlet The Server
Spawns A New Thread And Calls The Servlet Service () Method

11. Death of a
Servlet

12. Death of a servlet
 Before A Server Shuts Down It Will Call The Servlet’s Destroy () Method
 You Can Handle Any Servlet Clean Up Here.
Ex:
Updating log Files
Closing Database Connections
Closing Any Socket Connections

13. Generic
Servlet

14. Void int(Servlet Config Config)
-Initializers The Servlet
Void Service (Servlet Request req, Servlet Response res)
-Carries Out A Single Request From the Client
Void Destroy ()
-Cleans Up What Ever Resources Being Held
(Ex: Memory,File Handles)

15. Servlet Config Get Servlet Config()
-Returns As Servlet Config Object Which Contains Any Initialization
Parameters And Start up Configuration For This Servlet
String Get Servlet info()
-Returns A String Containing Information About the Servlet Such as it’s
Authors, Version & Copyright.

16. ….Thank
You….