@Override
public void onReceive(Object message) {
if (message instanceof MemberUp) {
MemberUp mUp = (MemberUp) message;
log.info("Member is Up: {}", mUp.member());
} else if (message instanceof UnreachableMember) {
UnreachableMember mUnreachable = (UnreachableMember) message;
log.info("Member detected as unreachable: {}", mUnreachable.member());