programming a javachat

Thread view:

Brian - 19 Sep 2007 15:51 GMT

Hi all

I'm going to program a chat in java. In the beginning there will be
50-100 users - later maybe more.

I think of making a multithreaded server that creates one thread per
client connected. (other suggestions welcome )

Is it possible(or a good idea) to keep the connection open between the
client and the server or should I close it after each transmission. If
closed then the client have to ping the server frequently to recieve
messages.

Shall the client have a thread running that pings the server and
another thread waiting for user input? What might be a better
solution?

The used bandwidth is also important in the beginning - the server
will run on my home computer. How can I calculate the amount of
traffic on the server?

Hope that some of you have some good advice for me :)

Brian

Reply to this Message

Roedy Green - 19 Sep 2007 17:34 GMT

>Hope that some of you have some good advice for me :)

see http://mindprod.com/jgloss/chat.html

Signature

Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com

Reply to this Message

k.nitin.r@gmail.com - 19 Sep 2007 18:05 GMT

Hi!

I'm assuming that you are using TCP/IP sockets for creating the chat
application.

I would suggest that once the client connects to the server, you've
got a 'session' established and should associate it with the username.
When you lose a connection, you can assume that the user is offline.
That way, the client remains connected to the server for the duration
of the session and would not normally disconnect, except when 'logging
off'. It's just my thought but you may have implemented it
differently.

Regards,
Nitin

> Hi all
>
[quoted text clipped - 20 lines]
>
> Brian

Reply to this Message

Knute Johnson - 19 Sep 2007 18:45 GMT

> Hi all
>
[quoted text clipped - 3 lines]
> I think of making a multithreaded server that creates one thread per
> client connected. (other suggestions welcome )

See my simple example of a Java Applet based chat system at

http://www.knutejohnson.com

> Is it possible(or a good idea) to keep the connection open between the
> client and the server or should I close it after each transmission. If
> closed then the client have to ping the server frequently to recieve
> messages.

Keeping it open is probably the simplest way.

> Shall the client have a thread running that pings the server and
> another thread waiting for user input? What might be a better
> solution?

Use the standard text components for client input. You can have a
thread running that receives data from the server.

> The used bandwidth is also important in the beginning - the server
> will run on my home computer. How can I calculate the amount of
> traffic on the server?

A hundred users typing 20 characters and sending them at the same time
is 2000 characters. Assuming they arrive within the same second that is
approximately 20kbit/sec. You should be able to do that with a dialup
connection. And I doubt that the 100 users will be able to type another
20 characters in the next second.

> Hope that some of you have some good advice for me :)
>
> Brian

Signature

Knute Johnson
email s/nospam/knute/

Reply to this Message

arabzwaj50@gmail.com - 20 Sep 2007 03:39 GMT

http://arabwazaef.com/arab/

http://www.arabzwaj.com/welcome/viewtopic.php?t=2417&sid=eedb9c67db690f3d5fa9cd2
7e6f93e7d

http://www.arabzwaj.com/welcome/viewtopic.php?t=2416&sid=eedb9c67db690f3d5fa9cd2
7e6f93e7d

.....

http://www.arabzwaj.com/welcome/viewtopic.php?t=2423&sid=eedb9c67db690f3d5fa9cd2
7e6f93e7d

http://www.arabzwaj.com/welcome/viewtopic.php?t=2422&sid=eedb9c67db690f3d5fa9cd2
7e6f93e7d

http://www.arabzwaj.com/welcome/viewtopic.php?t=2418&sid=eedb9c67db690f3d5fa9cd2
7e6f93e7d

!!!
http://www.arabzwaj.com/welcome/viewtopic.php?t=2367&sid=6c6614c5f9dd9b9eaa8c035
5e13e8f9c

http://www.arabzwaj.com/welcome/viewtopic.php?t=2332
...!

http://www.arabzwaj.com/welcome/viewtopic.php?p=11408#11408

http://www.arabzwaj.com/welcome/viewtopic.php?p=11395#11395

http://www.arabzwaj.com/welcome/viewtopic.php?t=2329

www.arabzwaj.com

http://www.arabzwaj.com/welcome/viewtopic.php?t=2333

http://www.arabzwaj.com/welcome/viewtopic.php?t=2332

http://www.arabzwaj.com/welcome/viewtopic.php?t=2328

http://www.arabzwaj.com/welcome/viewtopic.php?p=11403#11403

http://www.arabzwaj.com/welcome/viewtopic.php?p=11404#11404

http://www.arabzwaj.com/welcome/viewtopic.php?t=2336

http://www.arabzwaj.com/welcome/viewtopic.php?p=11406#11406

...!

http://www.arabzwaj.com/welcome/viewtopic.php?p=11408#11408
!
http://www.arabzwaj.com/welcome/viewtopic.php?t=2340
.............. !!!!!
http://www.arabzwaj.com/welcome/viewtopic.php?t=2341

http://www.arabzwaj.com/arabzwaj/welcome/viewtopic.php?t=2303

http://www.arabzwaj.com/arabzwaj/welcome/viewtopic.php?t=2299&start=0&postdays=0
&postorder=asc&highlight=
-
http://www.arabzwaj.com/welcome/viewtopic.php?t=2278
( )
http://www.arabzwaj.com/welcome/viewtopic.php?t=2279

http://www.arabzwaj.com/arabzwaj/welcome/viewtopic.php?t=2302&start=0&postdays=0
&postorder=asc&highlight=

http://www.arabzwaj.com/arabzwaj/welcome/viewtopic.php?t=2301

http://www.arabzwaj.com/welcome/viewtopic.php?t=2270

http://www.arabzwaj.com/welcome/viewtopic.php?t=2272

http://www.arabzwaj.com/arabzwaj/welcome/viewtopic.php?t=2297
( )

http://www.arabzwaj.com/welcome/viewtopic.php?t=2271
( )
http://www.arabzwaj.com/welcome/viewtopic.php?t=2273

http://www.arabzwaj.com/welcome/viewtopic.php?t=2264

>>FIFA 2007

http://www.arabzwaj.com/welcome/viewtopic.php?t=2266

www.arabzwaj.com

for marrige and friend ship
www.arabzwaj.com

www.arabzwaj.com

www.arabzwaj.com

the best web site formarrige and frindship www.arabzwaj.com

:-
www.arabzwaj.com/welcome

enter here and watch sexy arab girls

www.arabwazaef.com/arab

http://www.arabzwaj.com/welcome/viewtopic.php?t=1892

http://www.arabzwaj.com/welcome/viewtopic.php?t=900
**** ****
http://www.arabzwaj.com/welcome/viewtopic.php?t=1894
( )
http://www.arabzwaj.com/welcome/viewtopic.php?t=1880

http://www.arabzwaj.com/welcome/viewtopic.php?t=1879

a + +
http://www.arabzwaj.com/welcome/viewtopic.php?t=1956

http://www.arabzwaj.com/welcome/viewtopic.php?p=10201#10201
....
http://www.arabzwaj.com/welcome/viewtopic.php?p=10210#10210
000000 0
http://www.arabzwaj.com/welcome/viewtopic.php?t=686
..!
http://www.arabzwaj.com/welcome/viewtopic.php?p=10203#10203

http://www.arabzwaj.com/welcome/viewtopic.php?p=10207#10207

http://www.arabzwaj.com/welcome/viewtopic.php?p=10211#10211

.... !!!
http://www.arabzwaj.com/welcome/viewtopic.php?p=10200#10200

http://www.arabzwaj.com/welcome/viewtopic.php?p=10212#10212
..... !!
http://www.arabzwaj.com/welcome/viewtopic.php?p=10208#10208

:-
http://www.arabzwaj.com/welcome/viewtopic.php?p=10095#10095
5000
http://www.arabzwaj.com/welcome/viewtopic.php?t=1952&sid=15f0596ebc9c205da75f65e
b723025a2

http://www.arabzwaj.com/welcome/viewtopic.php?t=1587&start=0&postdays=0&postorde
r=asc&highlight=

http://www.arabzwaj.com/welcome/viewtopic.php?p=10213#10213

http://www.arabzwaj.com/welcome/viewtopic.php?p=10209#10209

http://www.arabzwaj.com/welcome/viewtopic.php?p=10205#10205
.......
http://www.arabzwaj.com/welcome/viewtopic.php?p=10206#10206

:-
http://www.arabzwaj.com/welcome/viewtopic.php?p=9855#9855

000000 0
http://www.arabzwaj.com/welcome/viewtopic.php?t=686

http://www.arabzwaj.com/welcome/viewtopic.php?t=1873

http://www.arabzwaj.com/welcome/viewtopic.php?t=124

:-
http://www.arabzwaj.com/welcome/viewtopic.php?p=9855#9855

( )
http://www.arabzwaj.com/welcome/viewtopic.php?p=9736#9736
Windows Live Messenger 8.0
http://www.arabzwaj.com/welcome/viewtopic.php?t=1834
( )
http://www.arabzwaj.com/welcome/viewtopic.php?t=1831

http://www.arabzwaj.com/welcome/viewtopic.php?t=1812

http://www.arabzwaj.com/welcome/posting.php?mode=editpost&p=9729

... ..
http://www.arabzwaj.com/welcome/viewtopic.php?t=1796

http://www.arabzwaj.com/welcome/viewtopic.php?t=1789

http://www.arabzwaj.com/welcome/viewtopic.php?t=1568&highlight=%E3%E1%DD
3
http://www.arabzwaj.com/welcome/viewtopic.php?t=1830

http://www.arabzwaj.com/welcome/viewtopic.php?t=1790

http://www.arabzwaj.com/welcome/viewtopic.php?t=102

00,
http://www.arabzwaj.com/welcome/viewtopic.php?p=9739#9739
( )
http://www.arabzwaj.com/welcome/viewtopic.php?p=9740#9740
2038
http://www.arabzwaj.com/welcome/viewtopic.php?t=1837

http://www.arabzwaj.com/welcome/viewtopic.php?t=1824

http://www.arabzwaj.com/welcome/viewtopic.php?t=1821

http://www.arabzwaj.com/welcome/viewtopic.php?t=1768
!!
http://www.arabzwaj.com/welcome/viewtopic.php?t=1751

http://www.arabzwaj.com/welcome/viewtopic.php?t=1838

http://www.arabzwaj.com/welcome/viewforum.php?f=11

http://www.arabzwaj.com/welcome/viewtopic.php?t=234

www.arabzwaj.com

:-arabzwaj@yahoo.com

hide ip
+ :
:-
http://d.turboupload.com/d/839284/157615851606157516051580hide.rar.html
:-
http://www.megaupload.com/?d=BBCGC4J0

the best web site formarrige and frindship www.arabzwaj.com

Reply to this Message

programming a javachat

Free Magazines