| package com.google.net.stubby.newtransport.netty; |
| |
| import static io.netty.channel.ChannelOption.SO_BACKLOG; |
| import static io.netty.channel.ChannelOption.SO_KEEPALIVE; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.util.concurrent.AbstractService; |
| import com.google.net.stubby.newtransport.ServerListener; |
| import com.google.net.stubby.newtransport.ServerTransportListener; |
| |
| import io.netty.handler.codec.http2.DefaultHttp2FrameReader; |
| import io.netty.handler.codec.http2.DefaultHttp2FrameWriter; |
| import io.netty.handler.codec.http2.DefaultHttp2InboundFlowController; |
| import io.netty.handler.codec.http2.DefaultHttp2OutboundFlowController; |
| import io.netty.handler.codec.http2.Http2Connection; |
| import io.netty.handler.codec.http2.Http2FrameLogger; |
| import io.netty.handler.codec.http2.Http2FrameReader; |
| import io.netty.handler.codec.http2.Http2FrameWriter; |
| import io.netty.handler.codec.http2.Http2InboundFrameLogger; |
| import io.netty.handler.codec.http2.Http2OutboundFlowController; |
| import io.netty.handler.codec.http2.Http2OutboundFrameLogger; |
| import io.netty.util.internal.logging.InternalLogLevel; |
| |
| import io.netty.bootstrap.ServerBootstrap; |
| import io.netty.channel.Channel; |
| import io.netty.channel.ChannelFuture; |
| import io.netty.channel.ChannelFutureListener; |
| import io.netty.channel.ChannelInitializer; |
| import io.netty.channel.EventLoopGroup; |
| import io.netty.channel.nio.NioEventLoopGroup; |
| import io.netty.channel.socket.SocketChannel; |
| import io.netty.channel.socket.nio.NioServerSocketChannel; |
| import io.netty.handler.codec.http2.DefaultHttp2Connection; |
| import io.netty.handler.codec.http2.DefaultHttp2StreamRemovalPolicy; |
| |
| /** |
| * Implementation of the {@link com.google.common.util.concurrent.Service} interface for a |
| * Netty-based server. |
| */ |
| public class NettyServer extends AbstractService { |
| private final int port; |
| private final ChannelInitializer<SocketChannel> channelInitializer; |
| private final EventLoopGroup bossGroup; |
| private final EventLoopGroup workerGroup; |
| private Channel channel; |
| |
| public NettyServer(ServerListener serverListener, int port) { |
| this(serverListener, port, new NioEventLoopGroup(), new NioEventLoopGroup()); |
| } |
| |
| public NettyServer(final ServerListener serverListener, int port, EventLoopGroup bossGroup, |
| EventLoopGroup workerGroup) { |
| Preconditions.checkNotNull(bossGroup, "bossGroup"); |
| Preconditions.checkNotNull(workerGroup, "workerGroup"); |
| Preconditions.checkArgument(port >= 0, "port must be positive"); |
| this.port = port; |
| this.channelInitializer = new ChannelInitializer<SocketChannel>() { |
| @Override |
| public void initChannel(SocketChannel ch) throws Exception { |
| // TODO(user): pass a real transport object |
| ServerTransportListener transportListener = serverListener.transportCreated(null); |
| ch.pipeline().addLast(newHandler(transportListener)); |
| } |
| }; |
| this.bossGroup = bossGroup; |
| this.workerGroup = workerGroup; |
| } |
| |
| @Override |
| protected void doStart() { |
| ServerBootstrap b = new ServerBootstrap(); |
| b.group(bossGroup, workerGroup); |
| b.channel(NioServerSocketChannel.class); |
| b.option(SO_BACKLOG, 128); |
| b.childOption(SO_KEEPALIVE, true); |
| b.childHandler(channelInitializer); |
| |
| // Bind and start to accept incoming connections. |
| b.bind(port).addListener(new ChannelFutureListener() { |
| @Override |
| public void operationComplete(ChannelFuture future) throws Exception { |
| if (future.isSuccess()) { |
| channel = future.channel(); |
| notifyStarted(); |
| } else { |
| notifyFailed(future.cause()); |
| } |
| } |
| }); |
| } |
| |
| @Override |
| protected void doStop() { |
| // Wait for the channel to close. |
| if (channel != null && channel.isOpen()) { |
| channel.close().addListener(new ChannelFutureListener() { |
| @Override |
| public void operationComplete(ChannelFuture future) throws Exception { |
| if (future.isSuccess()) { |
| notifyStopped(); |
| } else { |
| notifyFailed(future.cause()); |
| } |
| } |
| }); |
| } |
| |
| // Wait for the event loop group to shutdown. |
| if (bossGroup != null) { |
| bossGroup.shutdownGracefully(); |
| } |
| if (workerGroup != null) { |
| workerGroup.shutdownGracefully(); |
| } |
| } |
| |
| private static NettyServerHandler newHandler(ServerTransportListener transportListener) { |
| Http2Connection connection = |
| new DefaultHttp2Connection(true, new DefaultHttp2StreamRemovalPolicy()); |
| Http2FrameReader frameReader = new DefaultHttp2FrameReader(); |
| Http2FrameWriter frameWriter = new DefaultHttp2FrameWriter(); |
| |
| Http2FrameLogger frameLogger = new Http2FrameLogger(InternalLogLevel.DEBUG); |
| frameReader = new Http2InboundFrameLogger(frameReader, frameLogger); |
| frameWriter = new Http2OutboundFrameLogger(frameWriter, frameLogger); |
| |
| DefaultHttp2InboundFlowController inboundFlow = |
| new DefaultHttp2InboundFlowController(connection, frameWriter); |
| Http2OutboundFlowController outboundFlow = |
| new DefaultHttp2OutboundFlowController(connection, frameWriter); |
| return new NettyServerHandler(transportListener, |
| connection, |
| frameReader, |
| frameWriter, |
| inboundFlow, |
| outboundFlow); |
| } |
| } |