Example usage for java.nio.channels SocketChannel open

Introduction

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

Prototype

public static SocketChannel open() throws IOException 

Source Link

Document

Opens a socket channel.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    SocketChannel sChannel = SocketChannel.open();
    sChannel.configureBlocking(false);/*ww  w . jav a 2  s. c  o m*/

    sChannel.connect(new InetSocketAddress("hostName", 12345));

    while (!sChannel.finishConnect()) {
        // Do something else
    }

}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    SocketChannel sChannel = SocketChannel.open();
    sChannel.configureBlocking(false);/*from   www.  j a v a2s  .co  m*/
    sChannel.connect(new InetSocketAddress("hostName", 12345));

    ByteBuffer buf = ByteBuffer.allocateDirect(1024);
    buf.put((byte) 0xFF);

    buf.flip();

    int numBytesWritten = sChannel.write(buf);
}

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From source file:Main.java

public static void main(String[] argv) throws Exception {
    ByteBuffer buf = ByteBuffer.allocateDirect(1024);
    SocketChannel sChannel = SocketChannel.open();
    sChannel.configureBlocking(false);//from  w ww  .  j av a 2s  . co m
    sChannel.connect(new InetSocketAddress("hostName", 12345));

    int numBytesRead = sChannel.read(buf);

    if (numBytesRead == -1) {
        sChannel.close();
    } else {
        buf.flip();
    }
}

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From source file:MainClass.java

public static void main(String[] argv) throws Exception {
    String host = "localhost";
    int port = 80;

    InetSocketAddress addr = new InetSocketAddress(host, port);
    SocketChannel sc = SocketChannel.open();

    sc.configureBlocking(false);//from   w w w .  j a v a2s.  c om

    System.out.println("initiating connection");

    sc.connect(addr);

    while (!sc.finishConnect()) {
        System.out.println("doing something useless");
    }

    System.out.println("connection established");

    sc.close();
}

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From source file:GetWebPageDemo.java

public static void main(String args[]) throws Exception {
    String resource, host, file;//from   w w w .j ava 2 s.  c  o m
    int slashPos;

    resource = "www.java2s.com/index.htm";
    slashPos = resource.indexOf('/'); // find host/file separator
    if (slashPos < 0) {
        resource = resource + "/";
        slashPos = resource.indexOf('/');
    }
    file = resource.substring(slashPos); // isolate host and file parts
    host = resource.substring(0, slashPos);
    System.out.println("Host to contact: '" + host + "'");
    System.out.println("File to fetch : '" + file + "'");

    SocketChannel channel = null;

    try {
        Charset charset = Charset.forName("ISO-8859-1");
        CharsetDecoder decoder = charset.newDecoder();
        CharsetEncoder encoder = charset.newEncoder();

        ByteBuffer buffer = ByteBuffer.allocateDirect(1024);
        CharBuffer charBuffer = CharBuffer.allocate(1024);

        InetSocketAddress socketAddress = new InetSocketAddress(host, 80);
        channel = SocketChannel.open();
        channel.connect(socketAddress);

        String request = "GET " + file + " \r\n\r\n";
        channel.write(encoder.encode(CharBuffer.wrap(request)));

        while ((channel.read(buffer)) != -1) {
            buffer.flip();
            decoder.decode(buffer, charBuffer, false);
            charBuffer.flip();
            System.out.println(charBuffer);
            buffer.clear();
            charBuffer.clear();
        }
    } catch (UnknownHostException e) {
        System.err.println(e);
    } catch (IOException e) {
        System.err.println(e);
    } finally {
        if (channel != null) {
            try {
                channel.close();
            } catch (IOException ignored) {
            }
        }
    }

    System.out.println("\nDone.");
}

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From source file:GetWebPageApp.java

public static void main(String args[]) throws Exception {
    String resource, host, file;/*from  w  ww .  j av a 2s.co  m*/
    int slashPos;

    resource = "www.java2s.com/index.htm"; // skip HTTP://
    slashPos = resource.indexOf('/'); // find host/file separator
    if (slashPos < 0) {
        resource = resource + "/";
        slashPos = resource.indexOf('/');
    }
    file = resource.substring(slashPos); // isolate host and file parts
    host = resource.substring(0, slashPos);
    System.out.println("Host to contact: '" + host + "'");
    System.out.println("File to fetch : '" + file + "'");

    SocketChannel channel = null;

    try {
        Charset charset = Charset.forName("ISO-8859-1");
        CharsetDecoder decoder = charset.newDecoder();
        CharsetEncoder encoder = charset.newEncoder();

        ByteBuffer buffer = ByteBuffer.allocateDirect(1024);
        CharBuffer charBuffer = CharBuffer.allocate(1024);

        InetSocketAddress socketAddress = new InetSocketAddress(host, 80);
        channel = SocketChannel.open();
        channel.configureBlocking(false);
        channel.connect(socketAddress);

        selector = Selector.open();

        channel.register(selector, SelectionKey.OP_CONNECT | SelectionKey.OP_READ);

        while (selector.select(500) > 0) {
            Set readyKeys = selector.selectedKeys();
            try {
                Iterator readyItor = readyKeys.iterator();

                while (readyItor.hasNext()) {

                    SelectionKey key = (SelectionKey) readyItor.next();
                    readyItor.remove();
                    SocketChannel keyChannel = (SocketChannel) key.channel();

                    if (key.isConnectable()) {
                        if (keyChannel.isConnectionPending()) {
                            keyChannel.finishConnect();
                        }
                        String request = "GET " + file + " \r\n\r\n";
                        keyChannel.write(encoder.encode(CharBuffer.wrap(request)));
                    } else if (key.isReadable()) {
                        keyChannel.read(buffer);
                        buffer.flip();

                        decoder.decode(buffer, charBuffer, false);
                        charBuffer.flip();
                        System.out.print(charBuffer);

                        buffer.clear();
                        charBuffer.clear();

                    } else {
                        System.err.println("Unknown key");
                    }
                }
            } catch (ConcurrentModificationException e) {
            }
        }
    } catch (UnknownHostException e) {
        System.err.println(e);
    } catch (IOException e) {
        System.err.println(e);
    } finally {
        if (channel != null) {
            try {
                channel.close();
            } catch (IOException ignored) {
            }
        }
    }
    System.out.println("\nDone.");
}

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From source file:Main.java

public static void main(String[] args) throws Exception {
    InetAddress serverIPAddress = InetAddress.getByName("localhost");
    int port = 19000;
    InetSocketAddress serverAddress = new InetSocketAddress(serverIPAddress, port);
    Selector selector = Selector.open();
    SocketChannel channel = SocketChannel.open();
    channel.configureBlocking(false);//w ww . ja v a2  s  .co m
    channel.connect(serverAddress);
    int operations = SelectionKey.OP_CONNECT | SelectionKey.OP_READ | SelectionKey.OP_WRITE;
    channel.register(selector, operations);

    userInputReader = new BufferedReader(new InputStreamReader(System.in));
    while (true) {
        if (selector.select() > 0) {
            boolean doneStatus = processReadySet(selector.selectedKeys());
            if (doneStatus) {
                break;
            }
        }
    }
    channel.close();
}

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From source file:me.xingrz.prox.tcp.tunnel.RemoteTunnel.java

private static SocketChannel makeChannel() throws IOException {
    SocketChannel channel = SocketChannel.open();
    channel.configureBlocking(false);/*from  w w  w  . j a v  a2  s  .  co m*/
    channel.socket().bind(new InetSocketAddress(0));
    return channel;
}

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From source file:net.socket.nio.TimeClientHandle.java

public TimeClientHandle(String host, int port) {
    this.host = host == null ? "127.0.0.1" : host;
    this.port = port;
    try {//from  ww  w.  j  av  a 2 s  .  c o  m
        selector = Selector.open();
        socketChannel = SocketChannel.open();
        socketChannel.configureBlocking(false);
    } catch (IOException e) {
        e.printStackTrace();
        System.exit(1);
    }
}

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From source file:xbird.util.net.PoolableSocketChannelFactory.java

private static SocketChannel createSocketChannel(final SocketAddress sockAddr, final boolean blocking,
        final int rcvbufSize) {
    final SocketChannel ch;
    try {/*from ww w .j  a  va  2s . co  m*/
        ch = SocketChannel.open();
        ch.configureBlocking(blocking);
    } catch (IOException e) {
        LOG.error("Failed to open SocketChannel.", e);
        throw new IllegalStateException(e);
    }
    final Socket sock = ch.socket();
    if (rcvbufSize != -1) {
        try {
            sock.setReceiveBufferSize(rcvbufSize);
        } catch (SocketException e) {
            LOG.error("Failed to setReceiveBufferSize.", e);
            throw new IllegalStateException(e);
        }
    }
    final boolean connected;
    try {
        connected = ch.connect(sockAddr);
    } catch (IOException e) {
        LOG.error("Failed to connect socket: " + sockAddr, e);
        throw new IllegalStateException(e);
    }
    if (!connected) {
        throw new IllegalStateException("Failed to connect: " + sockAddr);
    }
    return ch;
}

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