// Called when an established peer sends us a message
private void processPeerMessage(SocketChannel c) throws IOException {
Peer peer = peers.get(c);
ByteBuffer b = ByteBuffer.allocateDirect(1);
int read = c.read(b);
if (read < 0) {
c.close();
return;
}
if (read < 1) return; // No data?
b.flip();
byte type = b.get();
switch (type) {
case MSG_DEBUG:
log(peer.getName() + ": " + ChannelHelper.getString(c));
break;
case MSG_BALL:
int id = ChannelHelper.getInt(c);
double position = ChannelHelper.getDouble(c);
double dx = ChannelHelper.getDouble(c);
double dy = ChannelHelper.getDouble(c);
int D = ChannelHelper.getInt(c);
if (listener != null) listener.receiveBall(id, position, dx, dy, D);
break;
// Dropped ball
// Informative to all peers & server
// (Maybe implement as passing ball to server?)
// Server may respond with “you lose”
// Drop player
// Paxos confirmation that client is gone
// Heartbeat?
// Probably only sent in response to drop
// Ping/pong messages
// Server failure
// All peers, send choice of backup
default:
System.err.println("Unknown peer message: " + type);
}
}
