public void close() throws ChannelException {
logger.trace("close() - entry");
try {
MulticastSocket socket = (MulticastSocket) getSocket();
if (socket != null) {
socket.leaveGroup(getGroup());
}
super.close();
} catch (IOException ex) {
logger.error("close() - Error closing sockets", ex);
}
logger.trace("close() - exit");
}
public void open() throws ChannelException {
if (logger.isTraceEnabled()) logger.trace("open() - entry");
if (socket == null) {
try {
socket = new MulticastSocket(getPort());
socket.joinGroup(getGroup());
} catch (UnknownHostException e) {
logger.error("open() - Unknown multicast group " + getGroup(), e);
throw new ChannelException("Unknown multicast group " + getGroup());
} catch (IOException e) {
logger.error("open() - Socket construction failed on port " + port, e);
throw new ChannelException("Socket construction failed on port " + port);
}
}
super.open();
if (logger.isTraceEnabled()) logger.trace("open() - exit");
}