package io.jpower.kcp.example.rtt; import io.jpower.kcp.netty.ChannelOptionHelper; import io.jpower.kcp.netty.UkcpChannel; import io.jpower.kcp.netty.UkcpChannelOption; import io.jpower.kcp.netty.UkcpClientChannel; import io.netty.bootstrap.Bootstrap; import io.netty.channel.ChannelFuture; import io.netty.channel.ChannelInitializer; import io.netty.channel.ChannelPipeline; import io.netty.channel.EventLoopGroup; import io.netty.channel.nio.NioEventLoopGroup; /** * Measures RTT(Round-trip time) for KCP. * <p> * Sends a message to server and receive a response from server to measure RTT. * * @author <a href="mailto:[email protected]">szh</a> */ public class KcpRttClient { static final int CONV = Integer.parseInt(System.getProperty("conv", "10")); static final String HOST = System.getProperty("host", "127.0.0.1"); static final int PORT = Integer.parseInt(System.getProperty("port", "8009")); static final int SIZE = Integer.parseInt(System.getProperty("size", "200")); static final int COUNT = Integer.parseInt(System.getProperty("count", "300")); static final int RTT_INTERVAL = Integer.parseInt(System.getProperty("rttInterval", "20")); public static void main(String[] args) throws Exception { // Configure the client. EventLoopGroup group = new NioEventLoopGroup(); try { Bootstrap b = new Bootstrap(); b.group(group) .channel(UkcpClientChannel.class) .handler(new ChannelInitializer<UkcpChannel>() { @Override public void initChannel(UkcpChannel ch) throws Exception { ChannelPipeline p = ch.pipeline(); p.addLast(new KcpRttClientHandler(COUNT)); } }); ChannelOptionHelper.nodelay(b, true, 20, 2, true) .option(UkcpChannelOption.UKCP_MTU, 512); // Start the client. ChannelFuture f = b.connect(HOST, PORT).sync(); // Wait until the connection is closed. f.channel().closeFuture().sync(); } finally { // Shut down the event loop to terminate all threads. group.shutdownGracefully(); } } }