private void rejoinMulticastGroup(short universe, String listenAddress) {
if (multicastKey != null) {
multicastKey.drop();
}
try {
multicastKey = joinMulticastGroup(universe, listenAddress);
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public ChannelFuture leaveGroup(
InetAddress multicastAddress,
NetworkInterface networkInterface,
InetAddress source,
ChannelPromise promise) {
if (PlatformDependent.javaVersion() < 7) {
throw new UnsupportedOperationException();
}
if (multicastAddress == null) {
throw new NullPointerException("multicastAddress");
}
if (networkInterface == null) {
throw new NullPointerException("networkInterface");
}
synchronized (this) {
if (memberships != null) {
List<MembershipKey> keys = memberships.get(multicastAddress);
if (keys != null) {
Iterator<MembershipKey> keyIt = keys.iterator();
while (keyIt.hasNext()) {
MembershipKey key = keyIt.next();
if (networkInterface.equals(key.networkInterface())) {
if (source == null && key.sourceAddress() == null
|| source != null && source.equals(key.sourceAddress())) {
key.drop();
keyIt.remove();
}
}
}
if (keys.isEmpty()) {
memberships.remove(multicastAddress);
}
}
}
}
promise.setSuccess();
return promise;
}