DahaR
asked on
java chat in which server send notification to all clients !!!!
hello to all .,
i am trying to make a console ( gui can be better ) client server chat program ( in java ofcourse !!! ) ...which is multithreaded ( of course !!! )......
...which goes like this ....
client : LOGIN shehryar ( " shehyar" will be extracted using substring )
server : clientname , ip , port ( sends this to all clients connected )
client : LOGOFF
server : clientname LOGOFF ( sends this to all clients conneted )
i have done a hell lot but cant seem to do it in the order specified.........( i am sure the order is pretty comprehensible ) .......
Explaination : when a client gets connected , it types LOGIN clientname ....... "clientname" is extracted using subtring ....then server send -> clientname hisIP hisPORT to all clients connected , and when client A types LOGOFF , the server send notification to all clients that client A has logged off ...
can plz any1 help in this and send me sum code stuff/part..........thanks
i am trying to make a console ( gui can be better ) client server chat program ( in java ofcourse !!! ) ...which is multithreaded ( of course !!! )......
...which goes like this ....
client : LOGIN shehryar ( " shehyar" will be extracted using substring )
server : clientname , ip , port ( sends this to all clients connected )
client : LOGOFF
server : clientname LOGOFF ( sends this to all clients conneted )
i have done a hell lot but cant seem to do it in the order specified.........( i am sure the order is pretty comprehensible ) .......
Explaination : when a client gets connected , it types LOGIN clientname ....... "clientname" is extracted using subtring ....then server send -> clientname hisIP hisPORT to all clients connected , and when client A types LOGOFF , the server send notification to all clients that client A has logged off ...
can plz any1 help in this and send me sum code stuff/part..........thanks
Mick Barry
http://www.javaworld.com/javaworld/jw-01-1997/jw-01-chat.html
You should maintain a list of all client-Sockets or their PrintWriters in a static Vector or something like that, at the server-side. When a client connects, then add its PrintWriter to the Vector. When a client disconnects, then remove it. While adding/ removing, iterate through the Vector and send a message to all other clients.
ASKER
ok !!! but will out.println(message); command , send the message to all clients connected or will i have to use synchronization.... or sumthing ???
If you use a Vector, it is synchronized itself, so you don't need to worry about that. You can store all the PrintWriters in that Vector, loop through it and send the data using out.println ( message ). Be careful not to send it to the same client himself~!
ASKER
ok ......lemme check !!!! by the way ...have u done anything similar to this program !!! that i can get help from or see !!! thx!!!
Hi all,
You can create a class for each client:
public class ChatClient
{
Socket soc;
String name,ip,port; // information about the client
PrintStream ps; // = new PrintStream( soc.getOutputStream() );
}
>> If you use a Vector, it is synchronized itself
only during the Vector method call.
The client list may need some synchronization :
public synchronized void addClient( ChatClient cc )
{
sendToAllClients("server: "+cc.name+", "+cc.ip+", "+cc.port);
clients.add(cc);
}
public synchronized void removeClient( PrintStream ps )
{
clients.remove(cc);
sendToAllClients("server: "+cc.name+" LOGOFF");
}
public synchronized void sendToAllClients( String msg )
{
int nb=clients.size();
for (int i=0;i<nb;i++)
((ChatClient)clients.eleme
}
You can create a class for each client:
public class ChatClient
{
Socket soc;
String name,ip,port; // information about the client
PrintStream ps; // = new PrintStream( soc.getOutputStream() );
}
>> If you use a Vector, it is synchronized itself
only during the Vector method call.
The client list may need some synchronization :
public synchronized void addClient( ChatClient cc )
{
sendToAllClients("server: "+cc.name+", "+cc.ip+", "+cc.port);
clients.add(cc);
}
public synchronized void removeClient( PrintStream ps )
{
clients.remove(cc);
sendToAllClients("server: "+cc.name+" LOGOFF");
}
public synchronized void sendToAllClients( String msg )
{
int nb=clients.size();
for (int i=0;i<nb;i++)
((ChatClient)clients.eleme
}
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
ok thanks man !!! i'll check it out and then tell ya !!!!!!!
ASKER
thanks a lot WEBSTORM !!!! yur idea really helped me !!!
well i have osting another question regarding sending image from server to client using streams......so do check it out....remember my LOGIN plz !!!!!!! see ya ...........
well i have osting another question regarding sending image from server to client using streams......so do check it out....remember my LOGIN plz !!!!!!! see ya ...........
DahaR. do you know that you can split the points between experts who provide an idea and who provide a working solution?
>> only during the Vector method call.
Ah, right.
Ah, right.
ASKER
sorry man , didnt know that :( .....will try to be careful next time .....n'ways thx for the info !!!
Hi mayankeagle,
>> do you know that you can split the points ...
You can post a question to
https://www.experts-exchange.com/Community_Support/askQuestion.jsp
Or i can post a question to give you points.
>> do you know that you can split the points ...
You can post a question to
https://www.experts-exchange.com/Community_Support/askQuestion.jsp
Or i can post a question to give you points.
No, Webstorm, not needed :-) thanks. I just wanted to let DahaR know that it is possible because I had a feeling he didn't know it. I don't have any issues with the PAQing of the question.