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Struts & Hibernate
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| | | R: servlet access in the same time and the result "error "(urgent ) | R: servlet access in the same time and the result "error "(urgent ) 2004-05-11 - By Rinaldo
Back
Hi,
I had have the same problem with code that seem like this.
public class Aextends HttpServlet {
java.io.PrintWriter  out;
.....
protected void processRequest(HttpServletRequest request,
HttpServletResponse response) throws
ServletException,
java.io.IOException {
out.println("AAA");
}
}
in this case user A sometime see the data for user B or viceversa.
I change the declaration of out and now all work fine.
public class Aextends HttpServlet {
.....
protected void processRequest(HttpServletRequest request,
HttpServletResponse response) throws
ServletException,
java.io.IOException {
java.io.PrintWriter out;
out.println("AAA");
}
}
If you want to see some example go to my website
http://www.rentsardinia.com/defaulte.html
and click on the map at this all are servlet.
Hope that help you
Regards
Rinaldo
-- --Messaggio originale-- --
Da: A mailing list for discussion about Sun Microsystem's Java Servlet API
Technology. [mailto:SERVLET-INTEREST@(protected)] Per conto di
Jayprakash_Gonella
Inviato: marted� 11 maggio 2004 15.11
A: SERVLET-INTEREST@(protected)
Oggetto: Re: servlet access in the same time and the result "error"(urgent )
Sounds plausible enough. at some point in the architecture we have to
synchronize the access to the data. but was kinda of thinking if we can
embed multi-threaded code in a servlet. won't these user-created threads
compete with the threads spawned by the servlet-container.....just a
doubt...
regards,
-jayprakash
-- --Original Message-- --
From: Tom K [mailto:tkoc@(protected)]
Sent: Tuesday, May 11, 2004 6:36 PM
To: SERVLET-INTEREST@(protected)
Subject: Re: servlet access in the same time and the result
"error"(urgent )
This is correct although not recommend (According to Jason Hunter "Java
Servlet Programming p.53". Because... "while the SingleThreadModel makes
the servlet itself thread safe, the interface does not make the system
thread safe" He recommends using synchronization with a connection pool.
Of course, I don't proclaim to be an expert...just going by the book :-)
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
Jayprakash_Gonella
Sent: Tuesday, May 11, 2004 6:54 AM
To: SERVLET-INTEREST@(protected)
Subject: Re: servlet access in the same time and the result
"error"(urgent )
You may your code Thread-Safe by implementing SingleThreadModel
Interface.
regards,
-jayprakash
-- --Original Message-- --
From: Andy Susanto [mailto:andy78@(protected)]
Sent: Tuesday, May 11, 2004 4:36 PM
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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To unsubscribe, send email to listserv@(protected) and include in the body
of the message "signoff SERVLET-INTEREST".
Archives: http://archives.java.sun.com/archives/servlet-interest.html
Resources: http://java.sun.com/products/servlet/external-resources.html
LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
**************************************************************************
This email (including any attachments) is intended for the sole use of the
intended recipient/s and may contain material that is CONFIDENTIAL AND
PRIVATE COMPANY INFORMATION. Any review or reliance by others or copying or
distribution or forwarding of any or all of the contents in this message is
STRICTLY PROHIBITED. If you are not the intended recipient, please contact
the sender by email and delete all copies; your cooperation in this regard
is appreciated.
**************************************************************************
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To unsubscribe, send email to listserv@(protected) and include in the body
of the message "signoff SERVLET-INTEREST".
Archives: http://archives.java.sun.com/archives/servlet-interest.html
Resources: http://java.sun.com/products/servlet/external-resources.html
LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
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of the message "signoff SERVLET-INTEREST".
Archives: http://archives.java.sun.com/archives/servlet-interest.html
Resources: http://java.sun.com/products/servlet/external-resources.html
LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
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