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| | | servlet access in the same time and the result "error "(urgent ) | servlet access in the same time and the result "error "(urgent ) 2004-05-11 - By Jayprakash_Gonella
Back
You may also may your code Thread-Safe by implementing SingleThreadModel
Interface.
regards,
-jayprakash
-- --Original Message-- --
From: Tom K [mailto:tkoc@(protected)]
Sent: Tuesday, May 11, 2004 5:16 PM
To: SERVLET-INTEREST@(protected)
Subject: Re: servlet access in the same time and the result
"error"(urgent)
Andy,
I'm not exactly sure on how you are querying your database but I
use prepared statements for performance reasons. The only thing you need
to synchronize is the prepared statement. You want to minimize
synchronization because it can lower the performance of your
application, but it's OK to synchronize your prepared statement and your
results should be correct.
It goes like this (from example in Jason Hunters book p.282:
Synchronized(pstmt){
Pstmt.clearParameters();
Pstmt.setInt(1,2);
Pstmt.setDouble(3, 53.43);
}
Tom Kochanowicz
-- --Original Message-- --
From: A mailing list for discussion about Sun Microsystem's Java Servlet
API Technology. [mailto:SERVLET-INTEREST@(protected)] On Behalf Of Andy
Susanto
Sent: Tuesday, May 11, 2004 6:06 AM
To: SERVLET-INTEREST@(protected)
Subject: servlet access in the same time and the result "error"(urgent)
hai,
my question is why my servlet if access in the same time with two or
more
user and the result is nor showing the right result. This error happen
if
performance computer is low. How can i fix this problem ?
example:
user JAVA 1.4
win2000Server
MySQL 3.23.25
Servlet Name = test
user A access test and User B access test. Sometimes result for user A
get
a user B Result otherwise User B get a result user A.
and my code is
public void doGet(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException{
synchronized(this){
MainProcess(req,res);
}
}
public void MainProcess(HttpServletRequest req,HttpServletResponse
res)
throws ServletException,IOException{
//do something
}
TIA,
andy
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