Example usage for io.netty.channel ChannelFuture isSuccess

Introduction

In this page you can find the example usage for io.netty.channel ChannelFuture isSuccess.

Prototype

boolean isSuccess();

Source Link

Document

Returns true if and only if the I/O operation was completed successfully.

Usage

From source file:org.apache.hadoop.hdfs.server.datanode.web.SimpleHttpProxyHandler.java

License:Apache License

@Override
public void channelRead0(final ChannelHandlerContext ctx, final HttpRequest req) {
    uri = req.getUri();/*from  w ww. j av  a  2 s  .  co  m*/
    final Channel client = ctx.channel();
    Bootstrap proxiedServer = new Bootstrap().group(client.eventLoop()).channel(NioSocketChannel.class)
            .handler(new ChannelInitializer<SocketChannel>() {
                @Override
                protected void initChannel(SocketChannel ch) throws Exception {
                    ChannelPipeline p = ch.pipeline();
                    p.addLast(new HttpRequestEncoder(), new Forwarder(uri, client));
                }
            });
    ChannelFuture f = proxiedServer.connect(host);
    proxiedChannel = f.channel();
    f.addListener(new ChannelFutureListener() {
        @Override
        public void operationComplete(ChannelFuture future) throws Exception {
            if (future.isSuccess()) {
                ctx.channel().pipeline().remove(HttpResponseEncoder.class);
                HttpRequest newReq = new DefaultFullHttpRequest(HTTP_1_1, req.getMethod(), req.getUri());
                newReq.headers().add(req.headers());
                newReq.headers().set(CONNECTION, Values.CLOSE);
                future.channel().writeAndFlush(newReq);
            } else {
                DefaultHttpResponse resp = new DefaultHttpResponse(HTTP_1_1, INTERNAL_SERVER_ERROR);
                resp.headers().set(CONNECTION, Values.CLOSE);
                LOG.info("Proxy " + uri + " failed. Cause: ", future.cause());
                ctx.writeAndFlush(resp).addListener(ChannelFutureListener.CLOSE);
                client.close();
            }
        }
    });
}

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From source file:org.apache.hive.spark.client.rpc.Rpc.java

License:Apache License

/**
 * Creates an RPC client for a server running on the given remote host and port.
 *
 * @param config RPC configuration data.
 * @param eloop Event loop for managing the connection.
 * @param host Host name or IP address to connect to.
 * @param port Port where server is listening.
 * @param clientId The client ID that identifies the connection.
 * @param secret Secret for authenticating the client with the server.
 * @param dispatcher Dispatcher used to handle RPC calls.
 * @return A future that can be used to monitor the creation of the RPC object.
 *//*w w  w .j a v  a2 s  .  c o  m*/
public static Promise<Rpc> createClient(Map<String, String> config, final NioEventLoopGroup eloop, String host,
        int port, final String clientId, final String secret, final RpcDispatcher dispatcher) throws Exception {
    final RpcConfiguration rpcConf = new RpcConfiguration(config);
    int connectTimeoutMs = (int) rpcConf.getConnectTimeoutMs();

    final ChannelFuture cf = new Bootstrap().group(eloop).handler(new ChannelInboundHandlerAdapter() {
    }).channel(NioSocketChannel.class).option(ChannelOption.SO_KEEPALIVE, true)
            .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, connectTimeoutMs).connect(host, port);

    final Promise<Rpc> promise = eloop.next().newPromise();
    final AtomicReference<Rpc> rpc = new AtomicReference<Rpc>();

    // Set up a timeout to undo everything.
    final Runnable timeoutTask = new Runnable() {
        @Override
        public void run() {
            promise.setFailure(new TimeoutException("Timed out waiting for RPC server connection."));
        }
    };
    final ScheduledFuture<?> timeoutFuture = eloop.schedule(timeoutTask, rpcConf.getServerConnectTimeoutMs(),
            TimeUnit.MILLISECONDS);

    // The channel listener instantiates the Rpc instance when the connection is established,
    // and initiates the SASL handshake.
    cf.addListener(new ChannelFutureListener() {
        @Override
        public void operationComplete(ChannelFuture cf) throws Exception {
            if (cf.isSuccess()) {
                SaslClientHandler saslHandler = new SaslClientHandler(rpcConf, clientId, promise, timeoutFuture,
                        secret, dispatcher);
                Rpc rpc = createRpc(rpcConf, saslHandler, (SocketChannel) cf.channel(), eloop);
                saslHandler.rpc = rpc;
                saslHandler.sendHello(cf.channel());
            } else {
                promise.setFailure(cf.cause());
            }
        }
    });

    // Handle cancellation of the promise.
    promise.addListener(new GenericFutureListener<Promise<Rpc>>() {
        @Override
        public void operationComplete(Promise<Rpc> p) {
            if (p.isCancelled()) {
                cf.cancel(true);
            }
        }
    });

    return promise;
}

---

From source file:org.apache.hive.spark.client.rpc.Rpc.java

License:Apache License

/**
 * Send an RPC call to the remote endpoint and returns a future that can be used to monitor the
 * operation./*from  w  w  w.  j a  v a 2 s.c  o  m*/
 *
 * @param msg RPC call to send.
 * @param retType Type of expected reply.
 * @return A future used to monitor the operation.
 */
public <T> Future<T> call(Object msg, Class<T> retType) {
    Preconditions.checkArgument(msg != null);
    Preconditions.checkState(channel.isActive(), "RPC channel is closed.");
    try {
        final long id = rpcId.getAndIncrement();
        final Promise<T> promise = createPromise();
        ChannelFutureListener listener = new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture cf) {
                if (!cf.isSuccess() && !promise.isDone()) {
                    LOG.warn("Failed to send RPC, closing connection.", cf.cause());
                    promise.setFailure(cf.cause());
                    dispatcher.discardRpc(id);
                    close();
                }
            }
        };

        dispatcher.registerRpc(id, promise, msg.getClass().getName());
        synchronized (channelLock) {
            channel.write(new MessageHeader(id, Rpc.MessageType.CALL)).addListener(listener);
            channel.writeAndFlush(msg).addListener(listener);
        }
        return promise;
    } catch (Exception e) {
        throw Throwables.propagate(e);
    }
}

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From source file:org.apache.jackrabbit.oak.plugins.segment.standby.client.FailedRequestListener.java

License:Apache License

@Override
public void operationComplete(ChannelFuture future) throws Exception {
    if (!future.isSuccess()) {
        promise.setFailure(future.cause());
        future.channel().close();/*w ww.j  ava  2 s .c  om*/
    } else {
        future.channel().read();
    }
}

---

From source file:org.apache.jackrabbit.oak.plugins.segment.standby.server.StandbyServer.java

License:Apache License

private void start(boolean wait) {
    if (running)/*from   ww w  .j  a  va 2s. c om*/
        return;

    this.handler.state = STATUS_STARTING;

    final Thread close = new Thread() {
        @Override
        public void run() {
            try {
                running = true;
                handler.state = STATUS_RUNNING;
                channelFuture.sync().channel().closeFuture().sync();
            } catch (InterruptedException e) {
                StandbyServer.this.stop();
            }
        }
    };
    final ChannelFutureListener bindListener = new ChannelFutureListener() {
        @Override
        public void operationComplete(ChannelFuture future) {
            if (future.isSuccess()) {
                close.start();
            } else {
                log.error("Server failed to start on port " + port + ", will be canceled", future.cause());
                future.channel().close();
                new Thread() {
                    @Override
                    public void run() {
                        close();
                    }
                }.start();
            }
        }
    };
    Future<?> startup = bossGroup.submit(new Runnable() {
        @Override
        public void run() {
            //netty 4.0.20 has a race condition issue with
            //asynchronous channel registration. As a workaround
            //we bind asynchronously from the boss event group to make
            //the channel registration synchronous.
            //Note that now this method will return immediately.
            channelFuture = b.bind(port);
            channelFuture.addListener(bindListener);
        }
    });
    if (!startup.awaitUninterruptibly(10000)) {
        log.error("Server failed to start within 10 seconds and will be canceled");
        startup.cancel(true);
    } else if (wait) {
        try {
            close.join();
        } catch (InterruptedException ignored) {
        }
    }
}

---

From source file:org.apache.pulsar.client.impl.ConnectionPool.java

License:Apache License

private CompletableFuture<ClientCnx> createConnection(InetSocketAddress address, int connectionKey) {
    if (log.isDebugEnabled()) {
        log.debug("Connection for {} not found in cache", address);
    }//w  w w .  j a  va 2 s  .  co m

    final CompletableFuture<ClientCnx> cnxFuture = new CompletableFuture<ClientCnx>();

    // Trigger async connect to broker
    bootstrap.connect(address).addListener((ChannelFuture future) -> {
        if (!future.isSuccess()) {
            log.warn("Failed to open connection to {} : {}", address,
                    future.cause().getClass().getSimpleName());
            cnxFuture.completeExceptionally(new PulsarClientException(future.cause()));
            cleanupConnection(address, connectionKey, cnxFuture);
            return;
        }

        log.info("[{}] Connected to server", future.channel());

        future.channel().closeFuture().addListener(v -> {
            // Remove connection from pool when it gets closed
            if (log.isDebugEnabled()) {
                log.debug("Removing closed connection from pool: {}", v);
            }
            cleanupConnection(address, connectionKey, cnxFuture);
        });

        // We are connected to broker, but need to wait until the connect/connected handshake is
        // complete
        final ClientCnx cnx = (ClientCnx) future.channel().pipeline().get("handler");
        if (!future.channel().isActive() || cnx == null) {
            if (log.isDebugEnabled()) {
                log.debug("[{}] Connection was already closed by the time we got notified", future.channel());
            }
            cnxFuture.completeExceptionally(new ChannelException("Connection already closed"));
            return;
        }

        cnx.connectionFuture().thenRun(() -> {
            if (log.isDebugEnabled()) {
                log.debug("[{}] Connection handshake completed", cnx.channel());
            }
            cnxFuture.complete(cnx);
        }).exceptionally(exception -> {
            log.warn("[{}] Connection handshake failed: {}", cnx.channel(), exception.getMessage());
            cnxFuture.completeExceptionally(exception);
            cleanupConnection(address, connectionKey, cnxFuture);
            cnx.ctx().close();
            return null;
        });
    });

    return cnxFuture;
}

---

From source file:org.apache.qpid.jms.transports.netty.NettyTcpTransport.java

License:Apache License

@Override
public void connect(SSLContext sslContextOverride) throws IOException {

    if (listener == null) {
        throw new IllegalStateException("A transport listener must be set before connection attempts.");
    }/*from   w ww. j  a va 2s .  c  o  m*/

    final SslHandler sslHandler;
    if (isSecure()) {
        try {
            TransportSslOptions sslOptions = getSslOptions();
            sslOptions.setSslContextOverride(sslContextOverride);

            sslHandler = TransportSupport.createSslHandler(getRemoteLocation(), sslOptions);
        } catch (Exception ex) {
            // TODO: can we stop it throwing Exception?
            throw IOExceptionSupport.create(ex);
        }
    } else {
        sslHandler = null;
    }

    group = new NioEventLoopGroup(1);

    bootstrap = new Bootstrap();
    bootstrap.group(group);
    bootstrap.channel(NioSocketChannel.class);
    bootstrap.handler(new ChannelInitializer<Channel>() {
        @Override
        public void initChannel(Channel connectedChannel) throws Exception {
            configureChannel(connectedChannel, sslHandler);
        }
    });

    configureNetty(bootstrap, getTransportOptions());

    ChannelFuture future = bootstrap.connect(getRemoteHost(), getRemotePort());
    future.addListener(new ChannelFutureListener() {

        @Override
        public void operationComplete(ChannelFuture future) throws Exception {
            if (!future.isSuccess()) {
                handleException(future.channel(), IOExceptionSupport.create(future.cause()));
            }
        }
    });

    try {
        connectLatch.await();
    } catch (InterruptedException ex) {
        LOG.debug("Transport connection was interrupted.");
        Thread.interrupted();
        failureCause = IOExceptionSupport.create(ex);
    }

    if (failureCause != null) {
        // Close out any Netty resources now as they are no longer needed.
        if (channel != null) {
            channel.close().syncUninterruptibly();
            channel = null;
        }
        if (group != null) {
            Future<?> fut = group.shutdownGracefully(0, SHUTDOWN_TIMEOUT, TimeUnit.MILLISECONDS);
            if (!fut.awaitUninterruptibly(2 * SHUTDOWN_TIMEOUT)) {
                LOG.trace("Channel group shutdown failed to complete in allotted time");
            }
            group = null;
        }

        throw failureCause;
    } else {
        // Connected, allow any held async error to fire now and close the transport.
        channel.eventLoop().execute(new Runnable() {

            @Override
            public void run() {
                if (failureCause != null) {
                    channel.pipeline().fireExceptionCaught(failureCause);
                }
            }
        });
    }
}

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From source file:org.apache.qpid.proton.netty.ProtonNettyHandler.java

License:Apache License

private void write(final ChannelHandlerContext ctx) {
    synchronized (lock) {
        while (true) {
            int pending = transport.pending();
            if (pending > 0) {
                final int size = pending - offset;
                if (size > 0) {
                    ByteBuf buffer = Unpooled.buffer(size);
                    ByteBuffer head = transport.head();
                    head.position(offset);
                    buffer.writeBytes(head);
                    ChannelFuture chf = ctx.writeAndFlush(buffer);
                    offset += size;// w  w  w.  j  a v  a 2  s  .co m
                    chf.addListener(new ChannelFutureListener() {
                        @Override
                        public void operationComplete(ChannelFuture chf) {
                            if (chf.isSuccess()) {
                                synchronized (lock) {
                                    transport.pop(size);
                                    offset -= size;
                                }
                                write(ctx);
                                dispatch();
                            } else {
                                // ???
                            }
                        }
                    });
                } else {
                    return;
                }
            } else {
                if (pending < 0) {
                    closeOnFlush(ctx.channel());
                }
                return;
            }
        }
    }
}

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From source file:org.apache.rocketmq.broker.client.net.Broker2Client.java

License:Apache License

public void checkProducerTransactionState(final Channel channel,
        final CheckTransactionStateRequestHeader requestHeader,
        final SelectMappedBufferResult selectMappedBufferResult) {
    RemotingCommand request = RemotingCommand.createRequestCommand(RequestCode.CHECK_TRANSACTION_STATE,
            requestHeader);/* w  w  w.  j  ava 2 s. c o m*/
    request.markOnewayRPC();

    try {
        FileRegion fileRegion = new OneMessageTransfer(request.encodeHeader(selectMappedBufferResult.getSize()),
                selectMappedBufferResult);
        channel.writeAndFlush(fileRegion).addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture future) throws Exception {
                selectMappedBufferResult.release();
                if (!future.isSuccess()) {
                    log.error("invokeProducer failed,", future.cause());
                }
            }
        });
    } catch (Throwable e) {
        log.error("invokeProducer exception", e);
        selectMappedBufferResult.release();
    }
}

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