public MulticastGroup()

in dubbo-remoting-extensions/dubbo-remoting-p2p/src/main/java/org/apache/dubbo/remoting/p2p/support/MulticastGroup.java [44:74]

• 31 lines of code
• 5 McCabe index (conditional complexity)

    public MulticastGroup(URL url) {
        super(url);
        if (!NetUtils.isMulticastAddress(url.getHost())) {
            throw new IllegalArgumentException("Invalid multicast address " + url.getHost() + ", scope: 224.0.0.0 - 239.255.255.255");
        }
        try {
            multicastAddress = InetAddress.getByName(url.getHost());
            multicastSocket = new MulticastSocket(url.getPort());
            multicastSocket.setLoopbackMode(false);
            multicastSocket.joinGroup(multicastAddress);
            Thread thread = new Thread(new Runnable() {
                @Override
                public void run() {
                    byte[] buf = new byte[1024];
                    DatagramPacket recv = new DatagramPacket(buf, buf.length);
                    while (true) {
                        try {
                            multicastSocket.receive(recv);
                            MulticastGroup.this.receive(new String(recv.getData()).trim(), (InetSocketAddress) recv.getSocketAddress());
                        } catch (Exception e) {
                            logger.error(e.getMessage(), e);
                        }
                    }
                }
            }, "MulticastGroupReceiver");
            thread.setDaemon(true);
            thread.start();
        } catch (IOException e) {
            throw new IllegalStateException(e.getMessage(), e);
        }
    }