socket problem chat?

[Marc Collin]

hi

i would like to know how in a application client/server how we send received
message to all client?

thanks

 

[Chris Smith]

i would like to know how in a application client/server how we send received
message to all client?

In general, there are two ways. One is to use multicast. The other is
to individually send the message to each client. Unless you're dealing
with a very large number of clients, it's probably best to do the
latter. Just keep a list of clients, and write a list to send messages
to each one... perhaps each in a different thread to control the delay.

--
www.designacourse.com
The Easiest Way To Train Anyone... Anywhere.

Chris Smith - Lead Software Developer/Technical Trainer
MindIQ Corporation

 

[Roedy Green]

i would like to know how in a application client/server how we send received
message to all client?

Consider using UDP. You can even then have clients send direct to each
other.

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

 

[Marc Collin]

In general, there are two ways. One is to use multicast. The other is
to individually send the message to each client. Unless you're dealing
with a very large number of clients, it's probably best to do the
latter. Just keep a list of clients, and write a list to send messages
to each one... perhaps each in a different thread to control the delay.

ok for the second method but we need to connect to the client
the client need to be a server..

 

[Roedy Green]

ok for the second method but we need to connect to the client
the client need to be a server..

Or:
1. UDP
2. every client maintains a socket
3. clients check in with HTTP every "minute" or so to see if there is
a massage.

 

[Chris Smith]

ok for the second method but we need to connect to the client
the client need to be a server..

When you establish a TCP connection from a client to the server, that
connection is two-way. The server can use it to send data to the
client. That's why java.net.Socket has methods called getInputStream()
and getOutputStream().

If your client disconnect, though, then yes they will need a
ServerSocket to listen for reconnection attempts from the server (and
this is also problematic because many -- or most? -- clients won't have
publicly available ports.)

--
www.designacourse.com
The Easiest Way To Train Anyone... Anywhere.

Chris Smith - Lead Software Developer/Technical Trainer
MindIQ Corporation

 

[zero]

When you establish a TCP connection from a client to the server, that
connection is two-way. The server can use it to send data to the
client. That's why java.net.Socket has methods called getInputStream()
and getOutputStream().

If your client disconnect, though, then yes they will need a
ServerSocket to listen for reconnection attempts from the server (and
this is also problematic because many -- or most? -- clients won't have
publicly available ports.)

Typically it's the client that connects to the server. The server just
sits, waiting for clients to connect. If you need the server to connect to
the client (instead of the other way around) you may want to rethink your
design.