// This method is called when a request has been made to close a client connection
public synchronized void disconnectClient(ClientConnection clientConnection) {
// Ensures this connection exists (a necessary check when this is being called from outside of a
// clientConnection)
if (clientConnection != null
&& clientConnection.isConnected()
&& clientSocketList.get(clientSocketList.indexOf(clientConnection)) != null) {
// Send the client a message telling it to close its socket
clientConnection.xmitMessage(ClientConnection.QUIT);
// Then close that socket...the user really doesn't have a choice. We're just asking to be
// nice.
clientSocketList.get(clientSocketList.indexOf(clientConnection)).closeSocket();
parent.updateStatusBox(
clientSocketList.indexOf(clientConnection)
+ " "
+ "Forcing disconnection of client "
+ clientConnection.id
+ " on port "
+ port
+ "...");
} else {
// If this thread is NOT connected, it may be stuck, so let's send an interrupt to wake it up
clientThreadList.get(clientSocketList.indexOf(clientConnection)).interrupt();
parent.updateStatusBox("Closing listen socket on port " + port + "...");
}
}
// THIS IS WHERE THE MAGIC HAPPENS -- on the server side at least
// This method sends some given message to ALL connected clients by creating an iterator from
// clientSocketList
// and executing the xmitMessage method for each element in that iterator
public synchronized void broadcastMsg(String message) {
Iterator<ClientConnection> clientIterator = clientSocketList.iterator();
ClientConnection clientConnection;
while (clientIterator.hasNext()) {
clientConnection = clientIterator.next();
clientConnection.xmitMessage(message);
}
}
// This method is called as a part of the client handshake -- the client makes a request to join
// the server
// and this method runs to check for information that should be sent back before they're
// ready to operate
// NOTE: In the original chat server implementation, this also sent the client information about
// the connected
// users and that kind of thing -- a handshake method like this is helpful when you want to
// provide some
// kind of immediate functionality to users who connect in the middle of something already in
// progress
// (like a vote or chat already in progress)
public synchronized void clientJoined(ClientConnection clientConnection) {
// If voting is already in progress, send the user the question list and allow them to start
// voting
if (voting) {
clientConnection.xmitMessage("/numq" + numQuestions);
for (int x = 0; x <= (numQuestions - 1); x++) {
clientConnection.xmitMessage("/ques" + String.valueOf(x) + questions[x]);
}
clientConnection.xmitMessage("/stvt");
} else {
// As a part of the handshake, the client is expecting some form of reply. This is
// placeholder for
// something actually useful
clientConnection.xmitMessage("You're connected!");
}
}