Method configureNetty

benchmarks/src/main/java/io/grpc/benchmarks/Utils.java:125–155

(
      NettyChannelBuilder builder, Transport transport, int flowControlWindow)

  }

  private static NettyChannelBuilder configureNetty(
      NettyChannelBuilder builder, Transport transport, int flowControlWindow) {
    builder.flowControlWindow(flowControlWindow);
    DefaultThreadFactory tf = new DefaultThreadFactory("client-elg-", true /*daemon */);
    switch (transport) {
      case NETTY_NIO:
        builder
            .eventLoopGroup(new NioEventLoopGroup(0, tf))
            .channelType(NioSocketChannel.class, InetSocketAddress.class);
        break;

      case NETTY_EPOLL:
        // These classes only work on Linux.
        builder
            .eventLoopGroup(new EpollEventLoopGroup(0, tf))
            .channelType(EpollSocketChannel.class, InetSocketAddress.class);
        break;

      case NETTY_UNIX_DOMAIN_SOCKET:
        // These classes only work on Linux.
        builder
            .eventLoopGroup(new EpollEventLoopGroup(0, tf))
            .channelType(EpollDomainSocketChannel.class, DomainSocketAddress.class);
        break;

      default:
        // Should never get here.
        throw new IllegalArgumentException("Unsupported transport: " + transport);
    }
    return builder;
  }

  private static ExecutorService clientExecutor;