public void addConnectionListener(ConnectionListener connectionListener) {
        if (connectionListener == null) {
            return;
        }
        if (!connectionListeners.contains(connectionListener)) {
            connectionListeners.add(connectionListener);
        }
    }
public void addConnectionListener(ConnectionListener connectionListener) {
        if (connectionListener == null) {
            return;
        }
        if (!connectionListeners.contains(connectionListener)) {
            connectionListeners.add(connectionListener);
        }
    }
public void addConnectionListener ( ConnectionListener connectionListener ) { if ( connectionListener == null ) { return ; } if ( ! connectionListeners . contains ( connectionListener ) ) { connectionListeners . add ( connectionListener ) ; } }
Adds a connection listener to this connection that will be notified when
the connection closes or fails.

@param connectionListener
a connection listener.
Adds a connection listener to this connection that will be notified when the connection closes or fails .