public void addPacketSendingListener ( PacketListener packetListener , PacketFilter packetFilter ) { if ( packetListener == null ) { throw new NullPointerException ( "Packet listener is null." ) ; } ListenerWrapper wrapper = new ListenerWrapper ( packetListener , packetFilter ) ; sendListeners . put ( packetListener , wrapper ) ; }
Registers a packet listener with this connection . The listener will be notified of every packet that this connection sends . A packet filter determines which packets will be delivered to the listener . Note that the thread that writes packets will be used to invoke the listeners . Therefore each packet listener should complete all operations quickly or use a different thread for processing .