Example usage for java.nio.channels SocketChannel connect

List of usage examples for java.nio.channels SocketChannel connect

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Introduction

In this page you can find the example usage for java.nio.channels SocketChannel connect.

Prototype

public abstract boolean connect(SocketAddress remote) throws IOException;

Source Link

Document

Connects this channel's socket.

Usage

From source file:gobblin.tunnel.TunnelTest.java

@Test
public void mustHandleClientDisconnectingWithoutClosingTunnel() throws Exception {
    mockExample();/*  w  w w.  ja  v a2 s  .  c o m*/
    Tunnel tunnel = Tunnel.build("example.org", 80, "localhost", PORT);

    try {
        int tunnelPort = tunnel.getPort();
        SocketChannel client = SocketChannel.open();

        client.connect(new InetSocketAddress("localhost", tunnelPort));
        client.write(ByteBuffer
                .wrap("GET / HTTP/1.1%nUser-Agent: GobblinTunnel%nConnection:keep - alive %n%n".getBytes()));
        client.close();

        assertNotNull(fetchContent(tunnelPort));
    } finally {
        tunnel.close();
    }
}

From source file:idgs.client.TcpClient.java

/**
 * //w w w  .j av  a  2 s.  com
 * @param timeout
 * @param retryTimes
 * @throws IOException
 */
public boolean connect(final boolean enableTimeoutCheck, final int timeout, final int retryTimes) {
    if (enableTimeoutCheck) {
        if (retryTimes <= 0) { // up to re-try times
            return isConnected();
        }
        Timer timer = new Timer(); // after timeout seconds, run timer task, if not connected, re-try again
        timer.schedule(new TimerTask() {
            public void run() {
                if (!isConnected()) {
                    int newRetryTimes = retryTimes - 1;
                    connect(enableTimeoutCheck, timeout, newRetryTimes);
                }
            }
        }, timeout);
    }
    try {
        SocketChannel channel = SocketChannel.open();
        channel.configureBlocking(false);
        channel.register(selector, SelectionKey.OP_CONNECT);
        channel.connect(servAddr);
        select();
    } catch (IOException e) {
        log.warn("try to connecte to server[" + servAddr.toString() + "] error, " + e.getMessage());
    }
    return isConnected();
}

From source file:com.saasovation.common.port.adapter.messaging.slothmq.SlothWorker.java

protected void sendTo(int aPort, String anEncodedMessage) {
    SocketChannel socketChannel = null;

    try {//  w  ww.j  av  a  2s.c o  m
        socketChannel = SocketChannel.open();
        InetSocketAddress address = new InetSocketAddress(InetAddress.getLoopbackAddress(), aPort);
        socketChannel.connect(address);
        socketChannel.write(ByteBuffer.wrap(anEncodedMessage.getBytes()));
        logger.debug("Sent: {}", anEncodedMessage);

    } catch (IOException e) {
        logger.error("Failed to send because: {}: Continuing...", e.getMessage(), e);
    } finally {
        if (socketChannel != null) {
            try {
                socketChannel.close();
            } catch (IOException e) {
                logger.error("Failed to close client socket because: {}: Continuing...", e.getMessage(), e);
            }
        }
    }
}

From source file:ee.ria.xroad.proxy.clientproxy.FastestSocketSelector.java

private SocketInfo initConnections(Selector selector) throws IOException {
    log.trace("initConnections()");

    for (URI target : addresses) {
        SocketChannel channel = SocketChannel.open();
        channel.setOption(StandardSocketOptions.TCP_NODELAY, true);
        channel.configureBlocking(false);
        try {//from   www  . ja v a  2 s .  c o m
            channel.register(selector, SelectionKey.OP_CONNECT, target);

            if (channel.connect(new InetSocketAddress(target.getHost(), target.getPort()))) { // connected immediately
                channel.configureBlocking(true);
                return new SocketInfo(target, channel.socket());
            }
        } catch (Exception e) {
            closeQuietly(channel);
            log.trace("Error connecting to '{}': {}", target, e);
        }
    }

    return null;
}

From source file:com.alexkli.jhb.Worker.java

@Override
public void run() {
    try {/* w ww. j  a  v  a  2s .c  o m*/
        while (true) {
            long start = System.nanoTime();

            QueueItem<HttpRequestBase> item = queue.take();

            idleAvg.add(System.nanoTime() - start);

            if (item.isPoisonPill()) {
                return;
            }

            HttpRequestBase request = item.getRequest();

            if ("java".equals(config.client)) {
                System.setProperty("http.keepAlive", "false");

                item.sent();

                try {
                    HttpURLConnection http = (HttpURLConnection) new URL(request.getURI().toString())
                            .openConnection();
                    http.setConnectTimeout(5000);
                    http.setReadTimeout(5000);
                    int statusCode = http.getResponseCode();

                    consumeAndCloseStream(http.getInputStream());

                    if (statusCode == 200) {
                        item.done();
                    } else {
                        item.failed();
                    }
                } catch (IOException e) {
                    System.err.println("Failed request: " + e.getMessage());
                    e.printStackTrace();
                    //                        System.exit(2);
                    item.failed();
                }
            } else if ("ahc".equals(config.client)) {
                try {
                    item.sent();

                    try (CloseableHttpResponse response = httpClient.execute(request, context)) {
                        int statusCode = response.getStatusLine().getStatusCode();
                        if (statusCode == 200) {
                            item.done();
                        } else {
                            item.failed();
                        }
                    }
                } catch (IOException e) {
                    System.err.println("Failed request: " + e.getMessage());
                    item.failed();
                }
            } else if ("fast".equals(config.client)) {
                try {
                    URI uri = request.getURI();

                    item.sent();

                    InetAddress addr = InetAddress.getByName(uri.getHost());
                    Socket socket = new Socket(addr, uri.getPort());
                    PrintWriter out = new PrintWriter(socket.getOutputStream());
                    //                        BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                    // send an HTTP request to the web server
                    out.println("GET / HTTP/1.1");
                    out.append("Host: ").append(uri.getHost()).append(":").println(uri.getPort());
                    out.println("Connection: Close");
                    out.println();
                    out.flush();

                    // read the response
                    consumeAndCloseStream(socket.getInputStream());
                    //                        boolean loop = true;
                    //                        StringBuilder sb = new StringBuilder(8096);
                    //                        while (loop) {
                    //                            if (in.ready()) {
                    //                                int i = 0;
                    //                                while (i != -1) {
                    //                                    i = in.read();
                    //                                    sb.append((char) i);
                    //                                }
                    //                                loop = false;
                    //                            }
                    //                        }
                    item.done();
                    socket.close();

                } catch (IOException e) {
                    e.printStackTrace();
                    item.failed();
                }
            } else if ("nio".equals(config.client)) {
                URI uri = request.getURI();

                item.sent();

                String requestBody = "GET / HTTP/1.1\n" + "Host: " + uri.getHost() + ":" + uri.getPort() + "\n"
                        + "Connection: Close\n\n";

                try {
                    InetSocketAddress addr = new InetSocketAddress(uri.getHost(), uri.getPort());
                    SocketChannel channel = SocketChannel.open();
                    channel.socket().setSoTimeout(5000);
                    channel.connect(addr);

                    ByteBuffer msg = ByteBuffer.wrap(requestBody.getBytes());
                    channel.write(msg);
                    msg.clear();

                    ByteBuffer buf = ByteBuffer.allocate(1024);

                    int count;
                    while ((count = channel.read(buf)) != -1) {
                        buf.flip();

                        byte[] bytes = new byte[count];
                        buf.get(bytes);

                        buf.clear();
                    }
                    channel.close();

                    item.done();

                } catch (IOException e) {
                    e.printStackTrace();
                    item.failed();
                }
            }
        }
    } catch (InterruptedException e) {
        System.err.println("Worker thread [" + this.toString() + "] was interrupted: " + e.getMessage());
    }
}

From source file:co.elastic.tealess.SSLChecker.java

private void checkConnect(SSLReport sslReport, SocketChannel socket, long timeout) {
    final InetSocketAddress address = sslReport.getAddress();
    try {//from w w  w .j  ava  2 s  . com
        logger.trace("Connecting to {}", address);
        Selector selector = Selector.open();
        SelectionKey sk = socket.register(selector, SelectionKey.OP_CONNECT);
        socket.connect(address);
        selector.select(timeout);
        if (!sk.isConnectable()) {
            sslReport.setFailed(new SocketTimeoutException());
            return;
        }
        if (socket.isConnectionPending()) {
            socket.finishConnect();
        }
    } catch (ConnectException e) {
        logger.debug("Connection failed to {}: {}", address, e);
        sslReport.setFailed(e);
        return;
    } catch (IOException e) {
        logger.error("Failed connecting to {}: {}", address, e);
        sslReport.setFailed(e);
        return;
    }

    logger.debug("Connection successful to {}", address);
}

From source file:eu.stratosphere.nephele.taskmanager.bytebuffered.OutgoingConnectionThread.java

@Override
public void run() {

    while (!isInterrupted()) {

        synchronized (this.pendingConnectionRequests) {

            if (!this.pendingConnectionRequests.isEmpty()) {

                final OutgoingConnection outgoingConnection = this.pendingConnectionRequests.poll();
                try {
                    final SocketChannel socketChannel = SocketChannel.open();
                    socketChannel.configureBlocking(false);
                    final SelectionKey key = socketChannel.register(this.selector, SelectionKey.OP_CONNECT);
                    socketChannel.connect(outgoingConnection.getConnectionAddress());
                    key.attach(outgoingConnection);
                } catch (final IOException ioe) {
                    // IOException is reported by separate thread to avoid deadlocks
                    final Runnable reporterThread = new Runnable() {

                        @Override
                        public void run() {
                            outgoingConnection.reportConnectionProblem(ioe);
                        }/*from   ww w.  ja v  a  2  s .c om*/
                    };
                    new Thread(reporterThread).start();
                }
            }
        }

        synchronized (this.pendingWriteEventSubscribeRequests) {

            if (!this.pendingWriteEventSubscribeRequests.isEmpty()) {
                final SelectionKey oldSelectionKey = this.pendingWriteEventSubscribeRequests.poll();
                final OutgoingConnection outgoingConnection = (OutgoingConnection) oldSelectionKey.attachment();
                final SocketChannel socketChannel = (SocketChannel) oldSelectionKey.channel();

                try {
                    final SelectionKey newSelectionKey = socketChannel.register(this.selector,
                            SelectionKey.OP_READ | SelectionKey.OP_WRITE);
                    newSelectionKey.attach(outgoingConnection);
                    outgoingConnection.setSelectionKey(newSelectionKey);
                } catch (final IOException ioe) {
                    // IOException is reported by separate thread to avoid deadlocks
                    final Runnable reporterThread = new Runnable() {

                        @Override
                        public void run() {
                            outgoingConnection.reportTransmissionProblem(ioe);
                        }
                    };
                    new Thread(reporterThread).start();
                }
            }
        }

        synchronized (this.connectionsToClose) {

            final Iterator<Map.Entry<OutgoingConnection, Long>> closeIt = this.connectionsToClose.entrySet()
                    .iterator();
            final long now = System.currentTimeMillis();
            while (closeIt.hasNext()) {

                final Map.Entry<OutgoingConnection, Long> entry = closeIt.next();
                if ((entry.getValue().longValue() + MIN_IDLE_TIME_BEFORE_CLOSE) < now) {
                    final OutgoingConnection outgoingConnection = entry.getKey();
                    closeIt.remove();
                    // Create new thread to close connection to avoid deadlocks
                    final Runnable closeThread = new Runnable() {

                        @Override
                        public void run() {
                            try {
                                outgoingConnection.closeConnection();
                            } catch (IOException ioe) {
                                outgoingConnection.reportTransmissionProblem(ioe);
                            }
                        }
                    };

                    new Thread(closeThread).start();
                }

            }
        }

        try {
            this.selector.select(10);
        } catch (IOException e) {
            LOG.error(e);
        }

        final Iterator<SelectionKey> iter = this.selector.selectedKeys().iterator();

        while (iter.hasNext()) {
            final SelectionKey key = iter.next();

            iter.remove();
            if (key.isValid()) {
                if (key.isConnectable()) {
                    doConnect(key);
                } else {
                    if (key.isReadable()) {
                        doRead(key);
                        // A read will always result in an exception, so the write key will not be valid anymore
                        continue;
                    }
                    if (key.isWritable()) {
                        doWrite(key);
                    }
                }
            } else {
                LOG.error("Received invalid key: " + key);
            }
        }
    }

    // Finally, try to close the selector
    try {
        this.selector.close();
    } catch (IOException ioe) {
        LOG.debug(StringUtils.stringifyException(ioe));
    }
}

From source file:edu.hawaii.soest.pacioos.text.SocketTextSource.java

/**
* A method used to the TCP socket of the remote source host for communication
* @param host       the name or IP address of the host to connect to for the
*                   socket connection (reading)
* @param portNumber the number of the TCP port to connect to (i.e. 2604)
*///  w w  w .  j av  a  2  s  . c  o  m
protected SocketChannel getSocketConnection() {

    String host = getHostName();
    int portNumber = new Integer(getHostPort()).intValue();
    SocketChannel dataSocket = null;

    try {

        // create the socket channel connection to the data source via the 
        // converter serial2IP converter      
        dataSocket = SocketChannel.open();
        dataSocket.connect(new InetSocketAddress(host, portNumber));

        // if the connection to the source fails, also disconnect from the RBNB
        // server and return null
        if (!dataSocket.isConnected()) {
            dataSocket.close();
            disconnect();
            dataSocket = null;
        }
    } catch (UnknownHostException ukhe) {

        log.info("Unable to look up host: " + host + "\n");
        disconnect();
        dataSocket = null;
    } catch (IOException nioe) {
        log.info("Couldn't get I/O connection to: " + host + ":" + portNumber);
        disconnect();
        dataSocket = null;
    }
    return dataSocket;

}

From source file:gobblin.tunnel.TestTunnelWithArbitraryTCPTraffic.java

private void runClientToTalkFirstServer(int tunnelPort) throws IOException {
    SocketChannel client = SocketChannel.open();

    client.connect(new InetSocketAddress("localhost", tunnelPort));
    String response0 = readFromSocket(client);
    LOG.info(response0);//from   w  w w .j  a v  a  2 s .  co  m

    client.write(ByteBuffer.wrap("Knock\n".getBytes()));
    String response1 = readFromSocket(client);
    LOG.info(response1);

    client.write(ByteBuffer.wrap("Hello\n".getBytes()));
    String response2 = readFromSocket(client);
    LOG.info(response2);

    client.close();

    assertEquals(response0, "Hello\n");
    assertEquals(response1, "Knock Knock\n");
    assertEquals(response2, "Hello Hello\n");
}

From source file:gobblin.tunnel.TestTunnelWithArbitraryTCPTraffic.java

@Test(timeOut = 15000)
public void testTunnelToEchoServer() throws IOException {
    MockServer proxyServer = startConnectProxyServer();
    Tunnel tunnel = Tunnel.build("localhost", doubleEchoServer.getServerSocketPort(), "localhost",
            proxyServer.getServerSocketPort());

    try {//from w ww .  j  a  v a2  s. c  o  m
        int tunnelPort = tunnel.getPort();
        SocketChannel client = SocketChannel.open();

        client.connect(new InetSocketAddress("localhost", tunnelPort));
        client.write(ByteBuffer.wrap("Knock\n".getBytes()));
        String response = readFromSocket(client);
        client.close();

        assertEquals(response, "Knock Knock\n");
        assertEquals(proxyServer.getNumConnects(), 1);
    } finally {
        proxyServer.stopServer();
        tunnel.close();
        assertFalse(tunnel.isTunnelThreadAlive());
    }
}