Forums Register Login

Questions about ServletContext and ServletConfig

+Pie Number of slices to send: Send
Hi all,

I have some questions about ServletContext and ServletConfig:

On HFSJ, page 151:
"By the time the servlet is running service methods, it's got a ServletConfig"

(Q1) Does this mean that ServletConfig can only be available in service() method (i.e. after init() method)?
(Q2) How about the ServletContext? Is ServletContext also ONLY be available in service() method (i.e. after init() method)?

On HFSJ, page 308:
"jspInit() called from the servlet's init() method, so by the time jspInit() runs there is a ServletConfig and ServletContext available to the servlet"

(Q3) As HFSJ mentioned, we can use ServletConfig and ServletContext in jspInit() method (i.e. can use them before _jspService() method, not like Servlet that only be avilable in service() method). Is this because the init() method of the generated servlet has already been executed and so ServletConfig and ServletContext are available in jspInit() method (since init() called jpsInit())?

Thanks
David
+Pie Number of slices to send: Send
hi,
Let me try to clarify your doubts : there are two version init method:
1)init(ServletConfig config) in Servlet [life cycle method]
2)init() in GenericServlet (provide for u to override)

When the container intializes the servlet it calls init (1 version) .This init after successful initialization calls init (2 version).

So by the time init() is called ServletConfig is already avaialble.

ServletConfig holds the reference to ServletContext(offcource u can also get it through getServletContext() of GenericServlet class).

Same is true with the jsp also.

i hope i have clarified ur doubts.
Please let me know if i m wrong

regards

-santosh
He's giving us the slip! Quick! Grab this tiny ad!
a bit of art, as a gift, that will fit in a stocking
https://gardener-gift.com


reply
reply
This thread has been viewed 1149 times.
Similar Threads
servlet lifecycle question
Calling jspInit() from servlet's init();
jspInit()
Regarding the init() methods
jspInit()
More...

All times above are in ranch (not your local) time.
The current ranch time is
Mar 28, 2024 07:57:04.