Java EpollSocketChannel类代码示例

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
public void connectPlugin(String host, int port) {
    ManagedChannel channel = NettyChannelBuilder.forAddress(host, port)
            .negotiationType(NegotiationType.PLAINTEXT) // TODO: gRPC encryption
            .keepAliveTime(1, TimeUnit.MINUTES)
            .keepAliveTimeout(5, TimeUnit.SECONDS)
            .directExecutor()
            .channelType(EpollSocketChannel.class)
            .eventLoopGroup(new EpollEventLoopGroup())
            .build();

    PluginManagerGrpc.PluginManagerBlockingStub blocking = PluginManagerGrpc.newBlockingStub(channel);
    PluginManagerGrpc.PluginManagerStub async = PluginManagerGrpc.newStub(channel);

    ServiceConnection connection = ServiceConnection.builder()
            .channel(channel)
            .blockingStub(blocking)
            .asyncStub(async)
            .build();

    this.pluginConnections.put(PLUGIN_MANAGER, connection);
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
public void start() throws InterruptedException {
	final EventLoopGroup workerGroup = Epoll.isAvailable() ? new EpollEventLoopGroup() : new NioEventLoopGroup();

	try {
		Bootstrap bootstrap = new Bootstrap();
		bootstrap.group(workerGroup)
				.channel(Epoll.isAvailable() ? EpollSocketChannel.class : NioSocketChannel.class)
				.handler(new OpenCloudChannelInitializer(this))
				.connect(this.host, this.port).sync().channel().closeFuture().syncUninterruptibly();
	} catch (Exception ex) {
		if (ex.getClass().getSimpleName().equals("AnnotatedConnectException")) {
			System.err.println("Cannot connect to master!");
			channel.close();
		} else {
			ex.printStackTrace();
		}
	} finally {
		workerGroup.shutdownGracefully();
		System.out.println("Netty client stopped");
		Runtime.getRuntime().halt(0);
	}
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
/**
 * Attempts to determine the {@link Channel} class that corresponds to the given
 * event loop group.
 *
 * @param eventLoopGroup the event loop group to determine the {@link Channel} for
 * @return A {@link Channel} class for the given event loop group.
 */
public static Class<? extends Channel> resolveSocketChannelClass(EventLoopGroup eventLoopGroup) {
    if (eventLoopGroup instanceof DelegatingEventLoopGroup) {
        return resolveSocketChannelClass(((DelegatingEventLoopGroup) eventLoopGroup).getDelegate());
    }
    if (eventLoopGroup instanceof NioEventLoopGroup) {
        return NioSocketChannel.class;
    }
    if (eventLoopGroup instanceof EpollEventLoopGroup) {
        return EpollSocketChannel.class;
    }
    String socketFqcn = KNOWN_EL_GROUPS.get(eventLoopGroup.getClass().getName());
    if (socketFqcn == null) {
        throw new IllegalArgumentException("Unknown event loop group : " + eventLoopGroup.getClass());
    }
    return invokeSafely(() -> (Class<? extends Channel>) Class.forName(socketFqcn));
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
private static Pair<EventLoopGroup, Class<? extends Channel>> createEventLoopGroup(
    Configuration conf) {
  // Max amount of threads to use. 0 lets Netty decide based on amount of cores
  int maxThreads = conf.getInt(CLIENT_MAX_THREADS, 0);

  // Config to enable native transport. Does not seem to be stable at time of implementation
  // although it is not extensively tested.
  boolean epollEnabled = conf.getBoolean(USE_NATIVE_TRANSPORT, false);

  // Use the faster native epoll transport mechanism on linux if enabled
  if (epollEnabled && JVM.isLinux() && JVM.isAmd64()) {
    if (LOG.isDebugEnabled()) {
      LOG.debug("Create EpollEventLoopGroup with maxThreads = " + maxThreads);
    }
    return new Pair<EventLoopGroup, Class<? extends Channel>>(new EpollEventLoopGroup(maxThreads,
        Threads.newDaemonThreadFactory("AsyncRpcChannel")), EpollSocketChannel.class);
  } else {
    if (LOG.isDebugEnabled()) {
      LOG.debug("Create NioEventLoopGroup with maxThreads = " + maxThreads);
    }
    return new Pair<EventLoopGroup, Class<? extends Channel>>(new NioEventLoopGroup(maxThreads,
        Threads.newDaemonThreadFactory("AsyncRpcChannel")), NioSocketChannel.class);
  }
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
@Override
public void init(final InetAddress address, final int port, final boolean useEpoll)
{
    final Class<? extends SocketChannel> socketChannelClass;
    final LazyValue<? extends EventLoopGroup> lazyInit;
    if ((Epoll.isAvailable()) && useEpoll)
    {
        socketChannelClass = EpollSocketChannel.class;
        lazyInit = this.epollEventLoopGroupLazyValue;
        CoreMain.debug("[Netty] Using epoll channel type");
    }
    else
    {
        socketChannelClass = NioSocketChannel.class;
        lazyInit = this.nioEventLoopGroupLazyValue;
        CoreMain.debug("[Netty] Using default channel type");
    }
    this.channelFuture = new Bootstrap().channel(socketChannelClass).handler(new ClientConnectionChannel(this)).group(lazyInit.get()).remoteAddress(address, port).connect().syncUninterruptibly();
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
public void connect(String apiKey) {
  Bootstrap bootstrap = new Bootstrap();
  Class<? extends Channel> channelClazz;

  if (Epoll.isAvailable()) {
    channelClazz = EpollSocketChannel.class;
    eventLoopGroup = new EpollEventLoopGroup();
  } else {
    channelClazz = NioSocketChannel.class;
    eventLoopGroup = new NioEventLoopGroup();
  }

  bootstrap.group(eventLoopGroup)
      .channel(channelClazz)
      .option(ChannelOption.SO_KEEPALIVE, true)
      // TODO: add function to get data class by topic and add handler
      .remoteAddress(host, port)
      .connect();
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
private void initEventLoopGroup() {
    // try Epoll first and if that does work, use nio.
    try {
        clientGroup = new EpollEventLoopGroup();
        serverGroup = new EpollEventLoopGroup();
        serverChannelClass = EpollServerSocketChannel.class;
        clientChannelClass = EpollSocketChannel.class;
        return;
    } catch (Throwable t) {
        log.warn("Failed to initialize native (epoll) transport. Reason: {}. Proceeding with nio.", t.getMessage());
    }
    clientGroup = new NioEventLoopGroup();
    serverGroup = new NioEventLoopGroup();
    serverChannelClass = NioServerSocketChannel.class;
    clientChannelClass = NioSocketChannel.class;
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
private void initEventLoopGroup() {
  // try Epoll first and if that does work, use nio.
  try {
    clientGroup = new EpollEventLoopGroup(0, namedThreads("netty-messaging-event-epoll-client-%d", log));
    serverGroup = new EpollEventLoopGroup(0, namedThreads("netty-messaging-event-epoll-server-%d", log));
    serverChannelClass = EpollServerSocketChannel.class;
    clientChannelClass = EpollSocketChannel.class;
    return;
  } catch (Throwable e) {
    log.debug("Failed to initialize native (epoll) transport. "
        + "Reason: {}. Proceeding with nio.", e.getMessage());
  }
  clientGroup = new NioEventLoopGroup(0, namedThreads("netty-messaging-event-nio-client-%d", log));
  serverGroup = new NioEventLoopGroup(0, namedThreads("netty-messaging-event-nio-server-%d", log));
  serverChannelClass = NioServerSocketChannel.class;
  clientChannelClass = NioSocketChannel.class;
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
public static ChannelConfiguration clientConfig(EventLoopGroup workerGroup) {
  EventLoopGroup parent = workerGroup;
  if (parent instanceof EventLoop) {
    parent = ((EventLoop) workerGroup).parent();
  }
  Class<? extends Channel> channelClass;
  if (parent instanceof EpollEventLoopGroup) {
    channelClass = EpollSocketChannel.class;
  } else if (parent instanceof NioEventLoopGroup) {
    channelClass = NioSocketChannel.class;
  } else {
    throw new RuntimeException("Unsupported EventLoopGroup " + workerGroup.getClass());
  }

  return new ChannelConfiguration(workerGroup, channelClass);
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
/**
 * This method will configure a worker EventLoopGroup and a Channel for use by a client. It will
 * try to use the correct SocketChannel for the provided workerGroup.
 *
 * @param workerGroup uses EventLoopGroup in the ClientChannelConfiguration
 * @return ClientChannelConfiguration
 */
public static ClientChannelConfiguration clientConfig(EventLoopGroup workerGroup) {
  EventLoopGroup parent = workerGroup;
  if (parent instanceof EventLoop) {
    parent = ((EventLoop) workerGroup).parent();
  }
  Class<? extends Channel> channelClass;
  if (parent instanceof EpollEventLoopGroup) {
    channelClass = EpollSocketChannel.class;
  } else if (parent instanceof NioEventLoopGroup) {
    channelClass = NioSocketChannel.class;
  } else {
    throw new RuntimeException("Unsupported EventLoopGroup " + workerGroup.getClass());
  }

  return new ClientChannelConfiguration(workerGroup, channelClass);
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
private void initEventLoopGroup() {
    // try Epoll first and if that does work, use nio.
    try {
        clientGroup = new EpollEventLoopGroup(0, groupedThreads("NettyMessagingEvt", "epollC-%d", log));
        serverGroup = new EpollEventLoopGroup(0, groupedThreads("NettyMessagingEvt", "epollS-%d", log));
        serverChannelClass = EpollServerSocketChannel.class;
        clientChannelClass = EpollSocketChannel.class;
        return;
    } catch (Throwable e) {
        log.debug("Failed to initialize native (epoll) transport. "
                + "Reason: {}. Proceeding with nio.", e.getMessage());
    }
    clientGroup = new NioEventLoopGroup(0, groupedThreads("NettyMessagingEvt", "nioC-%d", log));
    serverGroup = new NioEventLoopGroup(0, groupedThreads("NettyMessagingEvt", "nioS-%d", log));
    serverChannelClass = NioServerSocketChannel.class;
    clientChannelClass = NioSocketChannel.class;
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
/** Returns the correct (client) SocketChannel class based on IOMode. */
public static Class<? extends Channel> getClientChannelClass(IOMode mode) {
  switch (mode) {
    case NIO:
      return NioSocketChannel.class;
    case EPOLL:
      return EpollSocketChannel.class;
    default:
      throw new IllegalArgumentException("Unknown io mode: " + mode);
  }
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
@SuppressWarnings("unchecked")
@Override
public void addConnection(ServiceType serviceType, String host, int port) {
    ManagedChannel channel = NettyChannelBuilder.forAddress(host, port)
            .negotiationType(NegotiationType.PLAINTEXT) // TODO: gRPC encryption
            .keepAliveTime(1, TimeUnit.MINUTES)
            .keepAliveTimeout(5, TimeUnit.SECONDS)
            .directExecutor()
            .channelType(EpollSocketChannel.class)
            .eventLoopGroup(new EpollEventLoopGroup())
            .build();

    AbstractStub blocking;
    AbstractStub async;

    switch (serviceType) {
        case WORLD: {
            blocking = WorldServiceGrpc.newBlockingStub(channel);
            async = WorldServiceGrpc.newStub(channel);
            break;
        }
        case PLUGIN_MANAGER: {
            blocking = PluginManagerGrpc.newBlockingStub(channel);
            async = PluginManagerGrpc.newStub(channel);
            break;
        }
        default: {
            throw new RuntimeException("Service type not handled: " + serviceType.name());
        }
    }

    ServiceConnection connection = ServiceConnection.builder()
            .channel(channel)
            .blockingStub(blocking)
            .asyncStub(async)
            .build();

    this.connections.put(serviceType, connection);
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
public static NetworkManager func_181124_a(InetAddress p_181124_0_, int p_181124_1_, boolean p_181124_2_)
{
    final NetworkManager networkmanager = new NetworkManager(EnumPacketDirection.CLIENTBOUND);
    Class <? extends SocketChannel > oclass;
    LazyLoadBase <? extends EventLoopGroup > lazyloadbase;

    if (Epoll.isAvailable() && p_181124_2_)
    {
        oclass = EpollSocketChannel.class;
        lazyloadbase = field_181125_e;
    }
    else
    {
        oclass = NioSocketChannel.class;
        lazyloadbase = CLIENT_NIO_EVENTLOOP;
    }

    ((Bootstrap)((Bootstrap)((Bootstrap)(new Bootstrap()).group((EventLoopGroup)lazyloadbase.getValue())).handler(new ChannelInitializer<Channel>()
    {
        protected void initChannel(Channel p_initChannel_1_) throws Exception
        {
            try
            {
                p_initChannel_1_.config().setOption(ChannelOption.TCP_NODELAY, Boolean.valueOf(true));
            }
            catch (ChannelException var3)
            {
                ;
            }

            p_initChannel_1_.pipeline().addLast((String)"timeout", (ChannelHandler)(new ReadTimeoutHandler(30))).addLast((String)"splitter", (ChannelHandler)(new MessageDeserializer2())).addLast((String)"decoder", (ChannelHandler)(new MessageDeserializer(EnumPacketDirection.CLIENTBOUND))).addLast((String)"prepender", (ChannelHandler)(new MessageSerializer2())).addLast((String)"encoder", (ChannelHandler)(new MessageSerializer(EnumPacketDirection.SERVERBOUND))).addLast((String)"packet_handler", (ChannelHandler)networkmanager);
        }
    })).channel(oclass)).connect(p_181124_0_, p_181124_1_).syncUninterruptibly();
    return networkmanager;
}
 

import io.netty.channel.epoll.EpollSocketChannel; //导入依赖的package包/类
@Before
public void setUp()
throws Exception {

	serverMock = new EpollConnDroppingServer(DEFAULT_PORT, FAIL_EVERY_CONN_ATTEMPT);

	final Semaphore concurrencyThrottle = new Semaphore(CONCURRENCY);
	group = new EpollEventLoopGroup();
	final Bootstrap bootstrap = new Bootstrap()
		.group(group)
		.channel(EpollSocketChannel.class)
		.handler(
			new ChannelInitializer<SocketChannel>() {
				@Override
				protected final void initChannel(final SocketChannel conn)
				throws Exception {
					conn.pipeline().addLast(new DummyClientChannelHandler());
				}
			}
		)
		.option(ChannelOption.SO_KEEPALIVE, true)
		.option(ChannelOption.SO_REUSEADDR, true)
		.option(ChannelOption.TCP_NODELAY, true);
	connPool = new BasicMultiNodeConnPool(
		concurrencyThrottle, NODES, bootstrap, CPH, DEFAULT_PORT, 0
	);
	connPool.preCreateConnections(CONCURRENCY);
}