How to handle many clients from one servlet ?

[Multicoder4002]

Hi.

I'm programming a servlet that has to handle many client requests. The
problem is that the communication with more that one client
application is not working properly... here it is :

1 servlet (handling post requests only)
2 client applications (threads)

- client app 1 sends username_client_1
- client app 2 sends username_client_2
- client app 1 sends password_client_1
==> here, the servlet sometimes understands the login information as :
login=username_client_1 and password=password_client_2, instead of
login=username_client_1 and password=password_client_1

the same thing is happening in all the processes... I've tried to use
HttpSession object but that does not help me very much (we cannot
distinguish many clients all along the servlet process..)

If anyone helps thanks in advance...
see ya

 

[hiwa]

Hi.

I'm programming a servlet that has to handle many client requests. The
problem is that the communication with more that one client
application is not working properly... here it is :

1 servlet (handling post requests only)
2 client applications (threads)

- client app 1 sends username_client_1
- client app 2 sends username_client_2
- client app 1 sends password_client_1
==> here, the servlet sometimes understands the login information as :
login=username_client_1 and password=password_client_2, instead of
login=username_client_1 and password=password_client_1

the same thing is happening in all the processes... I've tried to use
HttpSession object but that does not help me very much (we cannot
distinguish many clients all along the servlet process..)

If anyone helps thanks in advance...
see ya

The critical part of you code is not properly synchronized per user
connection, or 'session' in Web app parlance.

 

[Robert Olofsson]

: Hi.
: - client app 1 sends username_client_1
: - client app 2 sends username_client_2
: - client app 1 sends password_client_1
: ==> here, the servlet sometimes understands the login information as :
: login=username_client_1 and password=password_client_2, instead of
: login=username_client_1 and password=password_client_1

Let me guess, you write servlets that have instance variables to keep
the username and password.

Basic rule of servlets is that they can not have instance variables
since several threads may be accessing the same servlet simultanious.
You can implement an interface if you want to have only one thread
serving the request.

/robo

 

[Multicoder4002]

Thank you It's ok now. I've verified all the source code, and
effectively, many data were not properly "synchronized"... All is
right
see ya