Example usage for java.net Socket connect

Introduction

In this page you can find the example usage for java.net Socket connect.

Prototype

public void connect(SocketAddress endpoint, int timeout) throws IOException 

Source Link

Document

Connects this socket to the server with a specified timeout value.

Usage

From source file:org.apache.jxtadoop.net.NetUtils.java

/**
 * This is a drop-in replacement for //from w w w  .  j  a  va  2s .c o m
 * {@link Socket#connect(SocketAddress, int)}.
 * In the case of normal sockets that don't have associated channels, this 
 * just invokes <code>socket.connect(endpoint, timeout)</code>. If 
 * <code>socket.getChannel()</code> returns a non-null channel,
 * connect is implemented using Hadoop's selectors. This is done mainly
 * to avoid Sun's connect implementation from creating thread-local 
 * selectors, since Hadoop does not have control on when these are closed
 * and could end up taking all the available file descriptors.
 * 
 * @see java.net.Socket#connect(java.net.SocketAddress, int)
 * 
 * @param socket
 * @param endpoint 
 * @param timeout - timeout in milliseconds
 */
public static void connect(Socket socket, SocketAddress endpoint, int timeout) throws IOException {
    if (socket == null || endpoint == null || timeout < 0) {
        throw new IllegalArgumentException("Illegal argument for connect()");
    }

    SocketChannel ch = socket.getChannel();

    if (ch == null) {
        // let the default implementation handle it.
        socket.connect(endpoint, timeout);
    } else {
        SocketIOWithTimeout.connect(ch, endpoint, timeout);
    }
}

---

From source file:net.NetUtils.java

/**
 * This is a drop-in replacement for //from w ww .j av a 2 s  . c o m
 * {@link Socket#connect(SocketAddress, int)}.
 * In the case of normal sockets that don't have associated channels, this 
 * just invokes <code>socket.connect(endpoint, timeout)</code>. If 
 * <code>socket.getChannel()</code> returns a non-null channel,
 * connect is implemented using Hadoop's selectors. This is done mainly
 * to avoid Sun's connect implementation from creating thread-local 
 * selectors, since Hadoop does not have control on when these are closed
 * and could end up taking all the available file descriptors.
 * 
 * @see java.net.Socket#connect(java.net.SocketAddress, int)
 * 
 * @param socket
 * @param endpoint 
 * @param timeout - timeout in milliseconds
 */
public static void connect(Socket socket, SocketAddress endpoint, int timeout) throws IOException {
    if (socket == null || endpoint == null || timeout < 0) {
        throw new IllegalArgumentException("Illegal argument for connect()");
    }

    SocketChannel ch = socket.getChannel();

    if (ch == null) {
        // let the default implementation handle it.
        socket.connect(endpoint, timeout);
    } else {
        SocketIOWithTimeout.connect(ch, endpoint, timeout);
    }

    // There is a very rare case allowed by the TCP specification, such that
    // if we are trying to connect to an endpoint on the local machine,
    // and we end up choosing an ephemeral port equal to the destination port,
    // we will actually end up getting connected to ourself (ie any data we
    // send just comes right back). This is only possible if the target
    // daemon is down, so we'll treat it like connection refused.
    if (socket.getLocalPort() == socket.getPort() && socket.getLocalAddress().equals(socket.getInetAddress())) {
        LOG.info("Detected a loopback TCP socket, disconnecting it");
        socket.close();
        throw new ConnectException("Localhost targeted connection resulted in a loopback. "
                + "No daemon is listening on the target port.");
    }
}

---

From source file:org.apache.hadoop.hdfs.server.namenode.TestAccessTokenWithDFS.java

private static void tryRead(Configuration conf, LocatedBlock lblock, boolean shouldSucceed) {
    InetSocketAddress targetAddr = null;
    Socket s = null;
    BlockReader blockReader = null;/*from ww  w.j a  v a 2  s  .  co m*/
    Block block = lblock.getBlock();
    try {
        DatanodeInfo[] nodes = lblock.getLocations();
        targetAddr = NetUtils.createSocketAddr(nodes[0].getName());
        s = new Socket();
        s.connect(targetAddr, HdfsConstants.READ_TIMEOUT);
        s.setSoTimeout(HdfsConstants.READ_TIMEOUT);

        blockReader = BlockReader.newBlockReader(s, targetAddr.toString() + ":" + block.getBlockId(),
                block.getBlockId(), lblock.getAccessToken(), block.getGenerationStamp(), 0, -1,
                conf.getInt("io.file.buffer.size", 4096));

    } catch (IOException ex) {
        if (ex instanceof InvalidAccessTokenException) {
            assertFalse("OP_READ_BLOCK: access token is invalid, " + "when it is expected to be valid",
                    shouldSucceed);
            return;
        }
        fail("OP_READ_BLOCK failed due to reasons other than access token");
    } finally {
        if (s != null) {
            try {
                s.close();
            } catch (IOException iex) {
            } finally {
                s = null;
            }
        }
    }
    if (blockReader == null) {
        fail("OP_READ_BLOCK failed due to reasons other than access token");
    }
    assertTrue("OP_READ_BLOCK: access token is valid, " + "when it is expected to be invalid", shouldSucceed);
}

---

From source file:org.apache.hadoop.hdfs.server.namenode.TestBlockTokenWithDFS.java

private static void tryRead(Configuration conf, LocatedBlock lblock, boolean shouldSucceed) {
    InetSocketAddress targetAddr = null;
    Socket s = null;
    DFSClient.BlockReader blockReader = null;
    Block block = lblock.getBlock();/*from  www.  jav  a  2 s .c  om*/
    try {
        DatanodeInfo[] nodes = lblock.getLocations();
        targetAddr = NetUtils.createSocketAddr(nodes[0].getName());
        s = new Socket();
        s.connect(targetAddr, HdfsConstants.READ_TIMEOUT);
        s.setSoTimeout(HdfsConstants.READ_TIMEOUT);

        blockReader = DFSClient.BlockReader.newBlockReader(s, targetAddr.toString() + ":" + block.getBlockId(),
                block.getBlockId(), lblock.getBlockToken(), block.getGenerationStamp(), 0, -1,
                conf.getInt("io.file.buffer.size", 4096));

    } catch (IOException ex) {
        if (ex instanceof InvalidBlockTokenException) {
            assertFalse("OP_READ_BLOCK: access token is invalid, " + "when it is expected to be valid",
                    shouldSucceed);
            return;
        }
        fail("OP_READ_BLOCK failed due to reasons other than access token");
    } finally {
        if (s != null) {
            try {
                s.close();
            } catch (IOException iex) {
            } finally {
                s = null;
            }
        }
    }
    if (blockReader == null) {
        fail("OP_READ_BLOCK failed due to reasons other than access token");
    }
    assertTrue("OP_READ_BLOCK: access token is valid, " + "when it is expected to be invalid", shouldSucceed);
}

---

From source file:org.apache.sling.maven.slingstart.run.LauncherCallable.java

public static void stop(final Log LOG, final ProcessDescription cfg) throws Exception {
    boolean isNew = false;

    if (cfg.getProcess() != null || isNew) {
        LOG.info("Stopping Launchpad " + cfg.getId());
        boolean destroy = true;
        final int twoMinutes = 2 * 60 * 1000;
        final File controlPortFile = getControlPortFile(cfg.getDirectory());
        LOG.debug("Control port file " + controlPortFile + " exists: " + controlPortFile.exists());
        if (controlPortFile.exists()) {
            // reading control port
            int controlPort = -1;
            String secretKey = null;
            LineNumberReader lnr = null;
            String serverName = null;
            try {
                lnr = new LineNumberReader(new FileReader(controlPortFile));
                final String portLine = lnr.readLine();
                final int pos = portLine.indexOf(':');
                controlPort = Integer.parseInt(portLine.substring(pos + 1));
                if (pos > 0) {
                    serverName = portLine.substring(0, pos);
                }//w  w w  . j a v  a  2  s .c om
                secretKey = lnr.readLine();
            } catch (final NumberFormatException ignore) {
                // we ignore this
                LOG.debug("Error reading control port file " + controlPortFile, ignore);
            } catch (final IOException ignore) {
                // we ignore this
                LOG.debug("Error reading control port file " + controlPortFile, ignore);
            } finally {
                IOUtils.closeQuietly(lnr);
            }

            if (controlPort != -1) {
                final List<String> hosts = new ArrayList<String>();
                if (serverName != null) {
                    hosts.add(serverName);
                }
                hosts.add("localhost");
                hosts.add("127.0.0.1");
                LOG.debug("Found control port " + controlPort);
                int index = 0;
                while (destroy && index < hosts.size()) {
                    final String hostName = hosts.get(index);

                    Socket clientSocket = null;
                    DataOutputStream out = null;
                    BufferedReader in = null;
                    try {
                        LOG.debug("Trying to connect to " + hostName + ":" + controlPort);
                        clientSocket = new Socket();
                        // set a socket timeout
                        clientSocket.connect(new InetSocketAddress(hostName, controlPort), twoMinutes);
                        // without that, read() call on the InputStream associated with this Socket is infinite
                        clientSocket.setSoTimeout(twoMinutes);

                        LOG.debug(hostName + ":" + controlPort
                                + " connection estabilished, sending the 'stop' command...");

                        out = new DataOutputStream(clientSocket.getOutputStream());
                        in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
                        if (secretKey != null) {
                            out.writeBytes(secretKey);
                            out.write(' ');
                        }
                        out.writeBytes("stop\n");
                        in.readLine();
                        destroy = false;
                        LOG.debug("'stop' command sent to " + hostName + ":" + controlPort);
                    } catch (final Throwable ignore) {
                        // catch Throwable because InetSocketAddress and Socket#connect throws unchecked exceptions
                        // we ignore this for now
                        LOG.debug("Error sending 'stop' command to " + hostName + ":" + controlPort
                                + " due to: " + ignore.getMessage());
                    } finally {
                        IOUtils.closeQuietly(in);
                        IOUtils.closeQuietly(out);
                        IOUtils.closeQuietly(clientSocket);
                    }
                    index++;
                }
            }
        }
        if (cfg.getProcess() != null) {
            final Process process = cfg.getProcess();

            if (!destroy) {
                // as shutdown might block forever, we use a timeout
                final long now = System.currentTimeMillis();
                final long end = now + twoMinutes;

                LOG.debug("Waiting for process to stop...");

                while (isAlive(process) && (System.currentTimeMillis() < end)) {
                    try {
                        Thread.sleep(2500);
                    } catch (InterruptedException e) {
                        // ignore
                    }
                }
                if (isAlive(process)) {
                    LOG.debug("Process timeout out after 2 minutes");
                    destroy = true;
                } else {
                    LOG.debug("Process stopped");
                }
            }

            if (destroy) {
                LOG.debug("Destroying process...");
                process.destroy();
                LOG.debug("Process destroyed");
            }

            cfg.setProcess(null);
        }
    } else {
        LOG.warn("Launchpad already stopped");
    }
}

---

From source file:org.apache.hama.util.BSPNetUtils.java

/**
 * Like {@link NetUtils#connect(Socket, SocketAddress, int)} but also takes a
 * local address and port to bind the socket to.
 * //from  w  w w  . ja v  a 2s  .co  m
 * @param socket
 * @param endpoint the remote address
 * @param localAddr the local address to bind the socket to
 * @param timeout timeout in milliseconds
 */
public static void connect(Socket socket, SocketAddress endpoint, SocketAddress localAddr, int timeout)
        throws IOException {
    if (socket == null || endpoint == null || timeout < 0) {
        throw new IllegalArgumentException("Illegal argument for connect()");
    }

    SocketChannel ch = socket.getChannel();

    if (localAddr != null) {
        socket.bind(localAddr);
    }

    if (ch == null) {
        // let the default implementation handle it.
        socket.connect(endpoint, timeout);
    } else {
        SocketIOWithTimeout.connect(ch, endpoint, timeout);
    }

    // There is a very rare case allowed by the TCP specification, such that
    // if we are trying to connect to an endpoint on the local machine,
    // and we end up choosing an ephemeral port equal to the destination port,
    // we will actually end up getting connected to ourself (ie any data we
    // send just comes right back). This is only possible if the target
    // daemon is down, so we'll treat it like connection refused.
    if (socket.getLocalPort() == socket.getPort() && socket.getLocalAddress().equals(socket.getInetAddress())) {
        LOG.info("Detected a loopback TCP socket, disconnecting it");
        socket.close();
        throw new ConnectException("Localhost targeted connection resulted in a loopback. "
                + "No daemon is listening on the target port.");
    }
}

---

From source file:org.mycard.net.network.HttpConnection.java

/***
 * Opens the connection to a http server
 *
 * @return the opened low level connection
 * @throws IOException if the connection fails for any reason.
 *///  w  ww . ja  v a 2  s.c  o m
@Override
AndroidHttpClientConnection openConnection(Request req) throws IOException {

    // Update the certificate info (connection not secure - set to null)
    //EventHandler eventHandler = req.getEventHandler();
    //mCertificate = null;
    //eventHandler.certificate(mCertificate);

    AndroidHttpClientConnection conn = new AndroidHttpClientConnection();
    BasicHttpParams params = new BasicHttpParams();
    Socket sock = new Socket();
    sock.connect(new InetSocketAddress(mHost.getHostName(), mHost.getPort()), 20 * 1000);
    params.setIntParameter(HttpConnectionParams.SOCKET_BUFFER_SIZE, 8192);

    conn.bind(sock, params);
    return conn;
}

---

From source file:com.googlecode.jsendnsca.NagiosPassiveCheckSender.java

private Socket connectedToNagios() throws IOException {
    Socket socket = new Socket();
    socket.connect(new InetSocketAddress(nagiosSettings.getNagiosHost(), nagiosSettings.getPort()),
            nagiosSettings.getConnectTimeout());
    socket.setSoTimeout(nagiosSettings.getTimeout());
    return socket;
}

---

From source file:nfinity.FindPeer.java

public Boolean ConnectPeerListener(String ip) {
    try {//from w w  w.  ja  v a  2  s.co  m
        //Soocket = socket = new Socket(ip, 1000);
        Socket socket = new Socket();
        socket.connect(new InetSocketAddress(ip, 1000), 1000);
        DataInputStream input = new DataInputStream(socket.getInputStream());
        String data = input.readUTF();
        System.out.println(data);
        String rspdata[] = data.split(" ");
        if (!rspdata[2].equals("")) {
            RemotePeerID = rspdata[2];
            return true;
        }
        socket.close();
    } catch (IOException ex) {
        System.out.println("Connection failed " + ex.getMessage());
    }
    return false;
}

---

From source file:org.jmxtrans.embedded.util.pool.SocketOutputStreamPoolFactory.java

@Override
public SocketOutputStream create(HostAndPort hostAndPort) throws Exception {
    Socket socket = new Socket();
    socket.setKeepAlive(true);//from w w w .ja v a 2s  . com
    socket.connect(new InetSocketAddress(hostAndPort.getHost(), hostAndPort.getPort()),
            socketConnectTimeoutInMillis);
    return new SocketOutputStream(socket);
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• »