Java ChannelFuture.getChannel方法代碼示例

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
public boolean bootstrap(HostAndPort seed, 
                         Node localNode) throws SyncException {
    this.localNode = localNode;
    succeeded = false;
    SocketAddress sa =
            new InetSocketAddress(seed.getHostText(), seed.getPort());
    ChannelFuture future = bootstrap.connect(sa);
    future.awaitUninterruptibly();
    if (!future.isSuccess()) {
        logger.debug("Could not connect to " + seed, future.getCause());
        return false;
    }
    Channel channel = future.getChannel();
    logger.debug("[{}] Connected to {}", 
                 localNode != null ? localNode.getNodeId() : null,
                 seed);
    
    try {
        channel.getCloseFuture().await();
    } catch (InterruptedException e) {
        logger.debug("Interrupted while waiting for bootstrap");
        return succeeded;
    }
    return succeeded;
}
 

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
protected boolean connect(String hostname, int port) {
    ready = false;
    if (channel == null || !channel.isConnected()) {
        SocketAddress sa =
                new InetSocketAddress(hostname, port);
        ChannelFuture future = clientBootstrap.connect(sa);
        future.awaitUninterruptibly();
        if (!future.isSuccess()) {
            logger.error("Could not connect to " + hostname + 
                         ":" + port, future.getCause());
            return false;
        }
        channel = future.getChannel();
    }
    while (!ready && channel != null && channel.isConnected()) {
        try {
            Thread.sleep(10);
        } catch (InterruptedException e) { }
    }
    if (!ready || channel == null || !channel.isConnected()) {
        logger.warn("Timed out connecting to {}:{}", hostname, port);
        return false;
    }
    logger.debug("Connected to {}:{}", hostname, port);
    return true;
}
 

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
/**
 * This attempts to bind to privileged ports, starting with 1023 and working downwards, and returns when the first binding succeeds.
 * 
 * <p>
 * Some NFS servers apparently may require that some requests originate on
 * an Internet port below IPPORT_RESERVED (1024). This is generally not
 * used, though, as the client then has to run as a user authorized for
 * privileged, which is dangerous. It is also not generally needed.
 * </p>
 * 
 * @return
 *         <ul>
 *         <li><code>true</code> if the binding succeeds,</li>
 *         <li><code>false</code> otherwise.</li>
 *         </ul>
 * @throws RpcException If an exception occurs, or if no binding succeeds.
 */
private Channel bindToPrivilegedPort() throws RpcException {
    System.out.println("Attempting to use privileged port.");
    for (int port = 1023; port > 0; --port) {
        try {
            ChannelPipeline pipeline = _clientBootstrap.getPipelineFactory().getPipeline();
            Channel channel = _clientBootstrap.getFactory().newChannel(pipeline);
            channel.getConfig().setOptions(_clientBootstrap.getOptions());
            ChannelFuture bindFuture = channel.bind(new InetSocketAddress(port)).awaitUninterruptibly();
            if (bindFuture.isSuccess()) {
                System.out.println("Success! Bound to port " + port);
                return bindFuture.getChannel();
            }
        } catch (Exception e) {
            String msg = String.format("rpc request bind error for address: %s", 
                    getRemoteAddress());
            throw new RpcException(RpcStatus.NETWORK_ERROR, msg, e);
        }
    }

    throw new RpcException(RpcStatus.LOCAL_BINDING_ERROR, String.format("Cannot bind a port < 1024: %s", getRemoteAddress()));
}
 

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
/**
 * 嘗試連接
 */
public void connect() {
       ChannelFuture future = bootstrap.connect(inetAddr);
       try{
           boolean ret = future.awaitUninterruptibly(Constants.TIMEOUT_CONNECTION_MILLSECOND, TimeUnit.MILLISECONDS);
           if (ret && future.isSuccess()) {
               Channel newChannel = future.getChannel();
               newChannel.setInterestOps(Channel.OP_READ_WRITE);
               try {
                   // 關閉舊的連接
                   Channel oldChannel = NettyRpcConnection.this.channel;
                   if (oldChannel != null) {
                       logger.info("Close old netty channel {} on create new netty channel {}", oldChannel, newChannel);
                       oldChannel.close();
                   }
               } finally {
                   if (!isConnected()) {
                       try {
                           logger.info("Close new netty channel {}, because the client closed.", newChannel);
                           newChannel.close();
                       } finally {
                       	NettyRpcConnection.this.channel = null;
                       }
                   } else {
                   	NettyRpcConnection.this.channel = newChannel;
                   }
               }
           } else if (null != future.getCause()) {
           	logger.error("connect fail", future.getCause());
           	throw new RuntimeException("connect error", future.getCause());
           } else {
           	logger.error("connect fail,connstr: "+this.getConnStr());
           	throw new RuntimeException("connect error");
           }
       }finally{
           if (! isConnected()) {
               future.cancel();
           }
       }
}
 

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
protected NodeChannels connectToChannelsLight(DiscoveryNode node) {
    InetSocketAddress address = ((InetSocketTransportAddress) node.address()).address();
    ChannelFuture connect = clientBootstrap.connect(address);
    connect.awaitUninterruptibly((long) (connectTimeout.millis() * 1.5));
    if (!connect.isSuccess()) {
        throw new ConnectTransportException(node, "connect_timeout[" + connectTimeout + "]", connect.getCause());
    }
    Channel[] channels = new Channel[1];
    channels[0] = connect.getChannel();
    channels[0].getCloseFuture().addListener(new ChannelCloseListener(node));
    return new NodeChannels(channels, channels, channels, channels, channels);
}
 

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
public TSOClientRaw(String host, int port) throws InterruptedException, ExecutionException {
    // Start client with Nb of active threads = 3 as maximum.
    ChannelFactory factory = new NioClientSocketChannelFactory(
            Executors.newCachedThreadPool(
                    new ThreadFactoryBuilder().setNameFormat("tsoclient-boss-%d").build()),
            Executors.newCachedThreadPool(
                    new ThreadFactoryBuilder().setNameFormat("tsoclient-worker-%d").build()), 3);
    // Create the bootstrap
    ClientBootstrap bootstrap = new ClientBootstrap(factory);

    InetSocketAddress addr = new InetSocketAddress(host, port);

    ChannelPipeline pipeline = bootstrap.getPipeline();
    pipeline.addLast("lengthbaseddecoder",
            new LengthFieldBasedFrameDecoder(8 * 1024, 0, 4, 0, 4));
    pipeline.addLast("lengthprepender", new LengthFieldPrepender(4));
    pipeline.addLast("protobufdecoder",
            new ProtobufDecoder(TSOProto.Response.getDefaultInstance()));
    pipeline.addLast("protobufencoder", new ProtobufEncoder());

    Handler handler = new Handler();
    pipeline.addLast("handler", handler);

    bootstrap.setOption("tcpNoDelay", true);
    bootstrap.setOption("keepAlive", true);
    bootstrap.setOption("reuseAddress", true);
    bootstrap.setOption("connectTimeoutMillis", 100);

    ChannelFuture channelFuture = bootstrap.connect(addr).await();
    channel = channelFuture.getChannel();
}
 

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
@Test(timeOut = 10_000)
public void testNettyChannelWriting() throws Exception {

    // ------------------------------------------------------------------------------------------------------------
    // Prepare test
    // ------------------------------------------------------------------------------------------------------------

    // Connect channel handler
    channelHandler.reconnect();
    // Create client and connect it
    ClientBootstrap nettyClient = createNettyClientBootstrap();
    ChannelFuture channelF = nettyClient.connect(new InetSocketAddress("localhost", 1434));
    // Basic checks for connection
    while (!channelF.isDone()) /** do nothing */ ;
    assertTrue(channelF.isSuccess());
    assertTrue(channelF.getChannel().isConnected());
    Channel channel = channelF.getChannel();
    // Eventually the channel group of the server should have 2 elements
    while (channelHandler.channelGroup.size() != 2) /** do nothing */ ;
    // Write first handshake request
    TSOProto.HandshakeRequest.Builder handshake = TSOProto.HandshakeRequest.newBuilder();
    // NOTE: Add here the required handshake capabilities when necessary
    handshake.setClientCapabilities(TSOProto.Capabilities.newBuilder().build());
    channelF.getChannel().write(TSOProto.Request.newBuilder().setHandshakeRequest(handshake.build()).build());

    // ------------------------------------------------------------------------------------------------------------
    // Test channel writing
    // ------------------------------------------------------------------------------------------------------------
    testWritingTimestampRequest(channel);

    testWritingCommitRequest(channel);

    testWritingFenceRequest(channel);
}
 

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
@SuppressWarnings({"unchecked", "rawtypes"})
@Override
public <R extends ActionRequest, T extends ActionResponse, B extends ActionRequestBuilder<R, T, B>>
void doExecute(Action<R, T, B> action, R request, ActionListener<T> listener) {
    HttpAction httpAction = actionMap.get(action);
    if (httpAction == null) {
        throw new IllegalStateException("failed to find http action [" + action + "] to execute");
    }
    try {
        HttpContext httpContext = new HttpContext(httpAction, listener, request);
        httpContext.httpRequest = httpAction.createHttpRequest(url, request);
        ChannelFuture future = bootstrap.connect(new InetSocketAddress(url.getHost(), url.getPort()));
        future.awaitUninterruptibly();
        if (!future.isSuccess()) {
            bootstrap.releaseExternalResources();
            logger.error("can't connect to {}", url);
        } else {
            Channel channel = future.getChannel();
            httpContext.setChannel(channel);
            httpContextMap.put(channel, httpContext);
            channel.getConfig().setConnectTimeoutMillis(settings.getAsInt("http.client.timeout", 5000));
            httpAction.execute(httpContext, listener);
        }
    } catch (IOException e) {
        logger.error(e.getMessage(), e);
    }
}
 

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
public void connect(){

		bootstrap = new ClientBootstrap( new NioClientSocketChannelFactory(
				Executors.newCachedThreadPool(),
				Executors.newCachedThreadPool()));
		bootstrap.setOption("tcpNoDelay", false);
		bootstrap.setOption("keepAlive", true);

		final NettyClientHandler handler = new NettyClientHandler(this, timer);
		
		bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
			
			public ChannelPipeline getPipeline() throws Exception {
				ChannelPipeline pipeline =  Channels.pipeline();
				pipeline.addLast("handler", handler);
				pipeline.addLast("encoder", new StringEncoder());
				return pipeline;
			}
		});
		
		bootstrap.setOption("remoteAddress", new InetSocketAddress(host, port));
		try {
			ChannelFuture future = bootstrap.connect().sync();
			channel = future.getChannel();
		} catch (Exception e) {
			logger.error(ExceptionUtil.getErrorMessage(e));
			bootstrap.releaseExternalResources();
			System.exit(-1);//第一次連接出現異常直接退出,不走重連
		}
	}
 

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
protected Channel openChannel(ChannelFuture channelFuture) throws Exception {
    // blocking for channel to be done
    if (LOG.isTraceEnabled()) {
        LOG.trace("Waiting for operation to complete {} for {} millis", channelFuture, configuration.getConnectTimeout());
    }
    // here we need to wait it in other thread
    final CountDownLatch channelLatch = new CountDownLatch(1);
    channelFuture.addListener(new ChannelFutureListener() {
        @Override
        public void operationComplete(ChannelFuture cf) throws Exception {
            channelLatch.countDown();
        }
    });

    try {
        channelLatch.await(configuration.getConnectTimeout(), TimeUnit.MILLISECONDS);
    } catch (InterruptedException ex) {
        throw new CamelException("Interrupted while waiting for " + "connection to "
                + configuration.getAddress());
    }

    if (!channelFuture.isDone() || !channelFuture.isSuccess()) {
        ConnectException cause = new ConnectException("Cannot connect to " + configuration.getAddress());
        if (channelFuture.getCause() != null) {
            cause.initCause(channelFuture.getCause());
        }
        throw cause;
    }
    Channel answer = channelFuture.getChannel();

    if (LOG.isDebugEnabled()) {
        LOG.debug("Creating connector to address: {}", configuration.getAddress());
    }
    return answer;
}
 

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
protected Channel openChannel(ChannelFuture channelFuture) throws Exception {
    // blocking for channel to be done
    if (LOG.isTraceEnabled()) {
        LOG.trace("Waiting for operation to complete {} for {} millis", channelFuture, configuration.getConnectTimeout());
    }
    // here we need to wait it in other thread
    final CountDownLatch channelLatch = new CountDownLatch(1);
    channelFuture.addListener(new ChannelFutureListener() {
        @Override
        public void operationComplete(ChannelFuture cf) throws Exception {
            channelLatch.countDown();
        }
    });
     
    try {
        channelLatch.await(configuration.getConnectTimeout(), TimeUnit.MILLISECONDS);
    } catch (InterruptedException ex) {
        throw new CamelException("Interrupted while waiting for " + "connection to "
                                 + configuration.getAddress());
    }
    

    if (!channelFuture.isDone() || !channelFuture.isSuccess()) {
        ConnectException cause = new ConnectException("Cannot connect to " + configuration.getAddress());
        if (channelFuture.getCause() != null) {
            cause.initCause(channelFuture.getCause());
        }
        throw cause;
    }
    Channel answer = channelFuture.getChannel();
    // to keep track of all channels in use
    allChannels.add(answer);

    if (LOG.isDebugEnabled()) {
        LOG.debug("Creating connector to address: {}", configuration.getAddress());
    }
    return answer;
}
 

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
protected void doConnect() throws Throwable {
    long start = System.currentTimeMillis();
    ChannelFuture future = bootstrap.connect(getConnectAddress());
    try{
        boolean ret = future.awaitUninterruptibly(getConnectTimeout(), TimeUnit.MILLISECONDS);
        
        if (ret && future.isSuccess()) {
            Channel newChannel = future.getChannel();
            newChannel.setInterestOps(Channel.OP_READ_WRITE);
            try {
                // 關閉舊的連接
                Channel oldChannel = NettyClient.this.channel; // copy reference
                if (oldChannel != null) {
                    try {
                        if (logger.isInfoEnabled()) {
                            logger.info("Close old netty channel " + oldChannel + " on create new netty channel " + newChannel);
                        }
                        oldChannel.close();
                    } finally {
                        NettyChannel.removeChannelIfDisconnected(oldChannel);
                    }
                }
            } finally {
                if (NettyClient.this.isClosed()) {
                    try {
                        if (logger.isInfoEnabled()) {
                            logger.info("Close new netty channel " + newChannel + ", because the client closed.");
                        }
                        newChannel.close();
                    } finally {
                        NettyClient.this.channel = null;
                        NettyChannel.removeChannelIfDisconnected(newChannel);
                    }
                } else {
                    NettyClient.this.channel = newChannel;
                }
            }
        } else if (future.getCause() != null) {
            throw new RemotingException(this, "client(url: " + getUrl() + ") failed to connect to server "
                    + getRemoteAddress() + ", error message is:" + future.getCause().getMessage(), future.getCause());
        } else {
            throw new RemotingException(this, "client(url: " + getUrl() + ") failed to connect to server "
                    + getRemoteAddress() + " client-side timeout "
                    + getConnectTimeout() + "ms (elapsed: " + (System.currentTimeMillis() - start) + "ms) from netty client "
                    + NetUtils.getLocalHost() + " using dubbo version " + Version.getVersion());
        }
    }finally{
        if (! isConnected()) {
            future.cancel();
        }
    }
}
 

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
public void setChannel(ChannelFuture channelfuture) {
	this.channel = channelfuture.getChannel();
}
 

import org.jboss.netty.channel.ChannelFuture; //導入方法依賴的package包/類
protected void doConnect() throws Throwable {
    long start = System.currentTimeMillis();
    ChannelFuture future = bootstrap.connect(getConnectAddress());
    try{
        boolean ret = future.awaitUninterruptibly(getConnectTimeout(), TimeUnit.MILLISECONDS);
        
        if (ret && future.isSuccess()) {
            Channel newChannel = future.getChannel();
            newChannel.setInterestOps(Channel.OP_READ_WRITE);
            try {
                // 關閉舊的連接
                Channel oldChannel = NettyClient.this.channel; // copy reference
                if (oldChannel != null) {
                    try {
                        if (log.isInfoEnabled()) {
                            log.info("Close old netty channel " + oldChannel + " on create new netty channel " + newChannel);
                        }
                        oldChannel.close();
                    } finally {
                        NettyChannel.removeChannelIfDisconnected(oldChannel);
                    }
                }
            } finally {
                if (NettyClient.this.isClosed()) {
                    try {
                        if (log.isInfoEnabled()) {
                            log.info("Close new netty channel " + newChannel + ", because the client closed.");
                        }
                        newChannel.close();
                    } finally {
                        NettyClient.this.channel = null;
                        NettyChannel.removeChannelIfDisconnected(newChannel);
                    }
                } else {
                    NettyClient.this.channel = newChannel;
                }
            }
        } else if (future.getCause() != null) {
            throw new RemotingException(this, "client(url: " + getUrl() + ") failed to connect to server "
                    + getRemoteAddress() + ", error message is:" + future.getCause().getMessage(), future.getCause());
        } else {
            throw new RemotingException(this, "client(url: " + getUrl() + ") failed to connect to server "
                    + getRemoteAddress() + " client-side timeout "
                    + getConnectTimeout() + "ms (elapsed: " + (System.currentTimeMillis() - start) + "ms) from netty client "
                    + NetUtils.getLocalHost() + " using dubbo version " + Version.getVersion());
        }
    }finally{
        if (! isConnected()) {
            future.cancel();
        }
    }
}