Example usage for java.net ServerSocket ServerSocket

Introduction

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

Prototype

public ServerSocket(int port) throws IOException 

Source Link

Document

Creates a server socket, bound to the specified port.

Usage

From source file:AvailablePortFinder.java

/**
 * Returns the {@link Set} of currently avaliable port numbers ({@link Integer})
 * between the specified port range./*  w  w w .j a  va  2 s. c  om*/
 *
 * @throws IllegalArgumentException if port range is not between
 * {@link #MIN_PORT_NUMBER} and {@link #MAX_PORT_NUMBER} or
 * <code>fromPort</code> if greater than <code>toPort</code>.
 */
public static Set<Integer> getAvailablePorts(int fromPort, int toPort) {
    if (fromPort < MIN_PORT_NUMBER || toPort > MAX_PORT_NUMBER || fromPort > toPort) {
        throw new IllegalArgumentException("Invalid port range: " + fromPort + " ~ " + toPort);
    }

    Set<Integer> result = new TreeSet<Integer>();

    for (int i = fromPort; i <= toPort; i++) {
        ServerSocket s = null;

        try {
            s = new ServerSocket(i);
            result.add(new Integer(i));
        } catch (IOException e) {
        } finally {
            if (s != null) {
                try {
                    s.close();
                } catch (IOException e) {
                    /* should not be thrown */
                }
            }
        }
    }

    return result;
}

---

From source file:info.varden.irclinqed.dcc.FileSendThread.java

@Override
public void onIPSelected(String ipAddress) {
    try {//from w  w  w .j  a v a2s . com
        if (!this.file.exists()) {
            return;
        }
        this.server = new ServerSocket(0);
        this.server.setSoTimeout(60000);
        DCCRequestPacket packet = null;
        String filename = this.file.getName();
        if (filename.split(" ").length > 1) {
            filename = "\"" + filename + "\"";
        }
        if (this.thread instanceof IRCThread) {
            packet = new DCCRequestPacket(this.il, (IRCThread) this.thread, this.target, DCCType.SEND, filename,
                    ipAddress, server.getLocalPort(), this.totalSize);
        } else if (this.thread instanceof DCCThread) {
            VirtualIRCThread thrd = new VirtualIRCThread(this.il, (DCCThread) this.thread);
            packet = new DCCRequestPacket(this.il, thrd, this.target, DCCType.SEND, filename, ipAddress,
                    server.getLocalPort(), this.totalSize);
        } else {
            this.server.close();
            return;
        }
        packet.send();
        if (this.cancel) {
            this.server.close();
            return;
        }
        this.message = "Waiting for connection...";
        Socket s = this.server.accept();
        this.overlay.unload();
        this.gfp = new GuiFileProgress(this.il, this);
        this.il.guiQueue.add(this.gfp);
        InputStream i = new FileInputStream(this.file);
        this.cos = new CountingOutputStream(s.getOutputStream());
        byte[] buff = new byte[1024];
        int k = -1;
        while ((k = i.read(buff)) > -1 && !this.cancel) {
            this.cos.write(buff, 0, k);
            s.getInputStream().read(new byte[4]);
        }
        s.shutdownInput();
        s.shutdownOutput();
        s.close();
        this.server.close();
        i.close();
        this.gfp.unload();
    } catch (SocketTimeoutException e) {
        this.overlay.unload();
        Util.extractUtil(this.thread).writeToChat(MessageType.DCC_ERROR, "File send timed out.");
    } catch (IOException e) {
        e.printStackTrace();
    }
    this.overlay.unload();
}

---

From source file:com.deicos.lince.Initializer.java

private boolean isPortFree(int port) {
    boolean isPortTaken = false;
    ServerSocket socket = null;/*from   w  w  w  .  ja v a2 s.  c  o  m*/
    try {
        socket = new ServerSocket(port);
    } catch (IOException e) {
        isPortTaken = true;
    } finally {
        if (socket != null)
            try {
                socket.close();
            } catch (IOException e) {
                /* e.printStackTrace(); */
            }
    }
    return isPortTaken;
}

---

From source file:fr.fastconnect.factory.tibco.bw.maven.bwengine.AbstractServiceEngineMojo.java

public static boolean available(int port, int minPort, int maxPort) {
    if (port < minPort || port > maxPort || port > 65535) {
        throw new IllegalArgumentException("Invalid start port: " + port);
    }/*  w ww.ja va  2s  . c om*/

    ServerSocket ss = null;
    DatagramSocket ds = null;
    try {
        ss = new ServerSocket(port);
        ss.setReuseAddress(true);
        ds = new DatagramSocket(port);
        ds.setReuseAddress(true);
        return true;
    } catch (IOException e) {
    } finally {
        if (ds != null) {
            ds.close();
        }

        if (ss != null) {
            try {
                ss.close();
            } catch (IOException e) {
                /* should not be thrown */
            }
        }
    }

    return false;
}

---

From source file:opendial.modules.core.RemoteConnector.java

/**
 * A server socket is created, using an arbitrary open port (NB: the port can be 
 * read in the "About" page in the GUI).
 * // ww  w  . j a va 2s.c  o  m
 * @param system the local dialogue system
 * @throws DialException if the server socket could not be opened
 */
public RemoteConnector(DialogueSystem system) throws DialException {
    this.system = system;
    try {
        local = new ServerSocket(0);
        new Thread(() -> readContent()).start();
    } catch (IOException e) {
        throw new DialException("cannot initialise remote connector: " + e);
    }
}

---

From source file:to.sven.androidrccar.host.communication.impl.SocketConnector.java

/**
 * Start to listen on the {@link ServerSocket}.
 *///from w w  w . j av a 2s.co m
@Override
protected AsyncTaskResult<Socket> doInBackground(Object... params) {
    try {
        ServerSocket serverSocket = new ServerSocket(port);
        Socket socket = serverSocket.accept();
        serverSocket.close();
        return new AsyncTaskResult<Socket>(socket);
    } catch (Exception ex) {
        return new AsyncTaskResult<Socket>(ex);
    }
}

---

From source file:org.apache.flink.streaming.api.functions.sink.SocketClientSinkTest.java

@Test
public void testSinkAutoFlush() throws Exception {
    final ServerSocket server = new ServerSocket(0);
    final int port = server.getLocalPort();

    final SocketClientSink<String> simpleSink = new SocketClientSink<>(host, port, simpleSchema, 0, true);
    simpleSink.open(new Configuration());

    final AtomicReference<Throwable> error = new AtomicReference<Throwable>();

    Thread sinkRunner = new Thread("Test sink runner") {
        @Override/*  ww  w . ja v  a  2 s  .  c  om*/
        public void run() {
            try {
                // need two messages here: send a fin to cancel the client state:FIN_WAIT_2 while the server is CLOSE_WAIT
                simpleSink.invoke(TEST_MESSAGE + '\n');
            } catch (Throwable t) {
                error.set(t);
            }
        }
    };

    sinkRunner.start();

    Socket sk = server.accept();
    BufferedReader rdr = new BufferedReader(new InputStreamReader(sk.getInputStream()));
    String value = rdr.readLine();

    sinkRunner.join();
    simpleSink.close();
    server.close();

    if (error.get() != null) {
        Throwable t = error.get();
        t.printStackTrace();
        fail("Error in spawned thread: " + t.getMessage());
    }

    assertEquals(TEST_MESSAGE, value);
}

---

From source file:it.crs4.pydoop.pipes.Application.java

/**
 * Start the child process to handle the task for us.
 * @param conf the task's configuration//from   w ww. ja v  a  2s  .  c  o  m
 * @param recordReader the fake record reader to update progress with
 * @param output the collector to send output to
 * @param reporter the reporter for the task
 * @param outputKeyClass the class of the output keys
 * @param outputValueClass the class of the output values
 * @throws IOException
 * @throws InterruptedException
 */
Application(JobConf conf, RecordReader<FloatWritable, NullWritable> recordReader,
        OutputCollector<K2, V2> output, Reporter reporter, Class<? extends K2> outputKeyClass,
        Class<? extends V2> outputValueClass) throws IOException, InterruptedException {
    serverSocket = new ServerSocket(0);
    Map<String, String> env = new HashMap<String, String>();
    // add TMPDIR environment variable with the value of java.io.tmpdir
    env.put("TMPDIR", System.getProperty("java.io.tmpdir"));
    env.put(Submitter.PORT, Integer.toString(serverSocket.getLocalPort()));

    TaskAttemptID taskid = TaskAttemptID.forName(conf.get(MRJobConfig.TASK_ATTEMPT_ID));

    // get the task's working directory
    String workDir = LocalJobRunner.getLocalTaskDir(conf.getUser(), taskid.getJobID().toString(),
            taskid.getTaskID().toString(), false);

    //Add token to the environment if security is enabled
    Token<JobTokenIdentifier> jobToken = TokenCache.getJobToken(conf.getCredentials());
    // This password is used as shared secret key between this application and
    // child pipes process
    byte[] password = jobToken.getPassword();

    String localPasswordFile = new File(workDir, "jobTokenPassword").getAbsolutePath();
    writePasswordToLocalFile(localPasswordFile, password, conf);
    env.put("hadoop.pipes.shared.secret.location", localPasswordFile);

    List<String> cmd = new ArrayList<String>();
    String interpretor = conf.get(Submitter.INTERPRETOR);
    if (interpretor != null) {
        cmd.add(interpretor);
    }
    String executable = DistributedCache.getLocalCacheFiles(conf)[0].toString();
    if (!(new File(executable).canExecute())) {
        // LinuxTaskController sets +x permissions on all distcache files already.
        // In case of DefaultTaskController, set permissions here.
        FileUtil.chmod(executable, "u+x");
    }
    cmd.add(executable);
    // wrap the command in a stdout/stderr capture
    // we are starting map/reduce task of the pipes job. this is not a cleanup
    // attempt. 
    File stdout = TaskLog.getTaskLogFile(taskid, false, TaskLog.LogName.STDOUT);
    File stderr = TaskLog.getTaskLogFile(taskid, false, TaskLog.LogName.STDERR);
    long logLength = TaskLog.getTaskLogLength(conf);
    cmd = TaskLog.captureOutAndError(null, cmd, stdout, stderr, logLength, false);

    process = runClient(cmd, env);
    clientSocket = serverSocket.accept();

    String challenge = getSecurityChallenge();
    String digestToSend = createDigest(password, challenge);
    String digestExpected = createDigest(password, digestToSend);

    handler = new OutputHandler<K2, V2>(output, reporter, recordReader, digestExpected);
    K2 outputKey = (K2) ReflectionUtils.newInstance(outputKeyClass, conf);
    V2 outputValue = (V2) ReflectionUtils.newInstance(outputValueClass, conf);
    downlink = new BinaryProtocol<K1, V1, K2, V2>(clientSocket, handler, outputKey, outputValue, conf);

    downlink.authenticate(digestToSend, challenge);
    waitForAuthentication();
    LOG.debug("Authentication succeeded");
    downlink.start();
    downlink.setJobConf(conf);
}

---

From source file:eu.smeny.jpapercut.smtp.MailServer.java

private void openServerSocket() {
    try {//from  www.j  a  va  2s.c om
        socket = new ServerSocket(port);
        logger.info("Socket opened successfully on port " + port);
        running = true;
    } catch (IOException ioe) {
        logger.error("Error while opening socket on port " + port, ioe);
    }
}

---

From source file:eu.eubrazilcc.lvl.core.util.NetworkingUtils.java

public static final boolean isPortAvailable(final int port) throws IllegalArgumentException {
    checkArgument(USER_PORTS_16_BITS.contains(port), "Invalid start port: " + port);
    try (final ServerSocket ss = new ServerSocket(port); final DatagramSocket ds = new DatagramSocket(port)) {
        ss.setReuseAddress(true);//from w  w w .j  ava 2  s.c om
        ds.setReuseAddress(true);
        return true;
    } catch (IOException ignore) {
    }
    return false;
}

---

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