@Override
    public boolean isConnected() {
        return channelFuture.channel() != null && channelFuture.channel().isActive();
    }
@author Robert HG (254963746@qq.com) on 11/4/15.
lts-core/src/main/java/com/github/ltsopensource/remoting/netty/NettyChannelFuture.java