Example usage for java.net Socket isConnected

Introduction

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

Prototype

public boolean isConnected() 

Source Link

Document

Returns the connection state of the socket.

Usage

From source file:org.wso2.carbon.business.messaging.core.internal.BrokerServiceComponent.java

/**
 * <p>//from   www .java  2  s.c  o m
 * check whether the tcp port has started. some times the server started thread may return
 * before Qpid server actually bind to the tcp port. in that case there are some connection
 * time out issues.
 * </p>
 *
 * @throws ConfigurationException
 */
private void startAMQPServer() throws ConfigurationException {

    boolean isServerStarted = false;
    int port;
    if (brokerService.getIfSSLOnly()) {
        port = brokerService.getAMQPSSLPort();
    } else {
        port = brokerService.getAMQPPort();
    }

    if (AndesConfigurationManager.<Boolean>readValue(AndesConfiguration.TRANSPORTS_AMQP_ENABLED)) {
        while (!isServerStarted) {
            Socket socket = null;
            try {
                InetAddress address = InetAddress.getByName(getAMQPTransportBindAddress());
                socket = new Socket(address, port);
                log.info("AMQP Host Address : " + address.getHostAddress() + " Port : " + port);
                isServerStarted = socket.isConnected();
                if (isServerStarted) {
                    log.info("Successfully connected to AMQP server " + "on port " + port);
                }
            } catch (IOException e) {
                //There will be a continuous retry effort to start the qpid server, if an error occurs the
                // exception will not be propagated further
                log.error("Wait until Qpid server starts on port " + port, e);
                try {
                    Thread.sleep(500);
                } catch (InterruptedException ignore) {
                    // Ignore
                }
            } finally {
                try {
                    if ((socket != null) && (socket.isConnected())) {
                        socket.close();
                    }
                } catch (IOException e) {
                    //There will be a continuous retry effort to close the socket, if an error occurs the
                    // exception will not be propagated further
                    log.error("Can not close the socket which is used to check the server " + "status ", e);
                }
            }
        }
    } else {
        log.warn("AMQP Transport is disabled as per configuration.");
    }
}

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From source file:org.socsimnet.server.test.ServerTest.java

@Test
public void testDataRegistration() throws Exception {
    Server server = new Server();
    assertTrue(server != null);/*from  w w w  . j  a  v  a  2 s .  co m*/
    server.start();
    Socket sock = new Socket("localhost", server.getPort());
    assertTrue(sock != null);
    BufferedReader in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
    assertTrue(in != null);
    PrintWriter out = new PrintWriter(sock.getOutputStream(), true);
    assertTrue(out != null);
    assertTrue(sock.isConnected());
    JSONObject json = new JSONObject();
    json.put("action", "register_data");
    json.put("name", "test_name");
    out.println(json.toString());
    out.flush();
    String data = in.readLine();
    JSONObject jsonObject = new JSONObject(data);
    assertEquals("ok", jsonObject.get("status"));

    server.stopServer();

    String shutdownAction = in.readLine();
    jsonObject = new JSONObject(shutdownAction);

    assertEquals("shutdown", jsonObject.get("action"));
}

---

From source file:org.socsimnet.server.test.ServerTest.java

@Test
public void testGetData() throws Exception {
    Server server = new Server();
    assertTrue(server != null);//from w w w .  j  a v  a  2  s .com
    server.start();
    Socket sock = new Socket("localhost", server.getPort());
    assertTrue(sock != null);
    BufferedReader in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
    assertTrue(in != null);
    PrintWriter out = new PrintWriter(sock.getOutputStream(), true);
    assertTrue(out != null);
    assertTrue(sock.isConnected());

    //reg few test data
    JSONObject json = new JSONObject();
    json.put("action", "register_data");
    json.put("name", "test_name");
    out.println(json.toString());
    out.flush();
    in.readLine();

    json = new JSONObject();
    json.put("action", "get_data");
    json.put("name", "test_name");
    out.println(json.toString());
    out.flush();
    String data = in.readLine();
    JSONObject jsonObject = new JSONObject(data);
    assertEquals("ok", jsonObject.get("status"));

    server.stopServer();
}

---

From source file:org.socsimnet.server.test.ServerTest.java

@Test
public void testGetDataList() throws Exception {
    Server server = new Server();
    assertTrue(server != null);/*from www.  j  av  a 2  s.  c  om*/
    server.start();
    Socket sock = new Socket("localhost", server.getPort());
    assertTrue(sock != null);
    BufferedReader in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
    assertTrue(in != null);
    PrintWriter out = new PrintWriter(sock.getOutputStream(), true);
    assertTrue(out != null);
    assertTrue(sock.isConnected());

    PrintWriter out2 = new PrintWriter(sock.getOutputStream(), true);

    //reg few test data
    JSONObject json = new JSONObject();
    json.put("action", "register_data");
    json.put("name", "test_name");
    out2.println(json.toString());
    out2.flush();
    in.readLine();

    json = new JSONObject();
    json.put("action", "register_data");
    json.put("name", "test_name2");
    out2.println(json.toString());
    out2.flush();
    in.readLine();

    json = new JSONObject();
    json.put("action", "get_data_list");
    out.println(json.toString());
    out.flush();
    String data = in.readLine();
    JSONObject jsonObject = new JSONObject(data);
    assertEquals("ok", jsonObject.get("status"));

    server.stopServer();
}

---

From source file:org.socsimnet.server.test.ServerTest.java

@Test
public void testSubscribe() throws Exception {
    Server server = new Server();
    assertTrue(server != null);// w w  w. j  ava2s.c o  m
    server.start();
    Socket sock = new Socket("localhost", server.getPort());
    assertTrue(sock != null);
    BufferedReader in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
    assertTrue(in != null);
    PrintWriter out = new PrintWriter(sock.getOutputStream(), true);
    assertTrue(out != null);
    assertTrue(sock.isConnected());

    JSONObject json = new JSONObject();
    json.put("action", "subscribe");
    json.put("name", "test_name");
    out.println(json.toString());
    out.flush();
    String data = in.readLine();
    JSONObject jsonObject = new JSONObject(data);
    assertEquals("error", jsonObject.get("status"));

    //reg few test data
    json = new JSONObject();
    json.put("action", "register_data");
    json.put("name", "test_name");
    out.println(json.toString());
    out.flush();
    in.readLine();

    json = new JSONObject();
    json.put("action", "subscribe");
    json.put("name", "test_name");
    out.println(json.toString());
    out.flush();
    data = in.readLine();
    jsonObject = new JSONObject(data);
    assertEquals("ok", jsonObject.get("status"));

    server.stopServer();
}

---

From source file:org.socsimnet.server.test.ServerTest.java

@Test
public void testClientAccept() throws Exception {
    Server server = new Server();
    assertTrue(server != null);//  w  ww .  j  a v a  2 s.c om
    server.start();
    Socket sock = new Socket("localhost", server.getPort());
    assertTrue(sock != null);
    BufferedReader in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
    assertTrue(in != null);
    PrintWriter out = new PrintWriter(sock.getOutputStream(), true);
    assertTrue(out != null);
    assertTrue(sock.isConnected());
    out.println(new JSONObject().put("action", "test").toString());
    out.flush();
    String data = in.readLine();
    JSONObject jsonObject = new JSONObject(data);
    assertEquals("test", jsonObject.get("msg"));

    Socket sock2 = new Socket("localhost", server.getPort());
    assertTrue(sock2 != null);
    BufferedReader in2 = new BufferedReader(new InputStreamReader(sock2.getInputStream()));
    assertTrue(in2 != null);
    PrintWriter out2 = new PrintWriter(sock2.getOutputStream(), true);
    assertTrue(out2 != null);
    assertTrue(sock2.isConnected());
    out2.println(new JSONObject().put("action", "test").toString());
    out2.flush();
    String data2 = in2.readLine();
    JSONObject jsonObject2 = new JSONObject(data2);
    assertEquals("test", jsonObject2.get("msg"));

    server.stopServer();

    String shutdownAction = in.readLine();
    String shutdownAction2 = in2.readLine();

    jsonObject = new JSONObject(shutdownAction);
    assertEquals("shutdown", jsonObject.get("action"));

    jsonObject = new JSONObject(shutdownAction2);
    assertEquals("shutdown", jsonObject.get("action"));
}

---

From source file:org.socsimnet.server.test.ServerTest.java

@Test
public void testSendData() throws Exception {

    Server server = new Server();
    assertTrue(server != null);/* w ww.j ava  2s .c  o m*/
    server.start();
    Socket sock = new Socket("localhost", server.getPort());
    assertTrue(sock != null);
    BufferedReader in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
    assertTrue(in != null);
    PrintWriter out = new PrintWriter(sock.getOutputStream(), true);
    assertTrue(out != null);
    assertTrue(sock.isConnected());

    Socket sock2 = new Socket("localhost", server.getPort());
    assertTrue(sock != null);
    BufferedReader in2 = new BufferedReader(new InputStreamReader(sock2.getInputStream()));
    assertTrue(in != null);
    PrintWriter out2 = new PrintWriter(sock2.getOutputStream(), true);
    assertTrue(out != null);
    assertTrue(sock2.isConnected());

    //reg few test data
    JSONObject json = new JSONObject();
    json = new JSONObject();
    json.put("action", "register_data");
    json.put("name", "test_name");
    out.println(json.toString());
    out.flush();
    in.readLine();

    json = new JSONObject();
    json.put("action", "subscribe");
    json.put("name", "test_name");
    out2.println(json.toString());
    out2.flush();
    String data = in2.readLine();
    JSONObject jsonObject = new JSONObject(data);
    assertEquals("ok", jsonObject.get("status"));

    json = new JSONObject();
    json.put("action", "send_data");
    json.put("name", "test_name");
    json.put("value", "test_value");
    out.println(json.toString());
    out.flush();
    in.readLine();

    data = in2.readLine();
    jsonObject = new JSONObject(data);
    assertEquals("ok", jsonObject.get("status"));

    json = new JSONObject();
    json.put("action", "send_data");
    json.put("name", "test_name");
    json.put("value", "test_value2");
    out.println(json.toString());
    out.flush();
    in.readLine();

    data = in2.readLine();
    jsonObject = new JSONObject(data);
    assertEquals("ok", jsonObject.get("status"));
    assertEquals("test_value2", jsonObject.get("value"));

}

---

From source file:org.socsimnet.server.test.ServerTest.java

@Test
public void testUnsubscribe() throws Exception {
    Server server = new Server();
    assertTrue(server != null);/*from  w  ww.ja  v  a  2  s.c o  m*/
    server.start();
    Socket sock = new Socket("localhost", server.getPort());
    assertTrue(sock != null);
    BufferedReader in = new BufferedReader(new InputStreamReader(sock.getInputStream()));
    assertTrue(in != null);
    PrintWriter out = new PrintWriter(sock.getOutputStream(), true);
    assertTrue(out != null);
    assertTrue(sock.isConnected());

    Socket sock2 = new Socket("localhost", server.getPort());
    assertTrue(sock != null);
    BufferedReader in2 = new BufferedReader(new InputStreamReader(sock2.getInputStream()));
    assertTrue(in != null);
    PrintWriter out2 = new PrintWriter(sock2.getOutputStream(), true);
    assertTrue(out != null);
    assertTrue(sock2.isConnected());

    JSONObject json = new JSONObject();
    json.put("action", "unsubscribe");
    json.put("name", "test_name");
    out.println(json.toString());
    out.flush();
    String data = in.readLine();
    JSONObject jsonObject = new JSONObject(data);
    assertEquals("error", jsonObject.get("status"));

    //reg few test data
    json = new JSONObject();
    json.put("action", "register_data");
    json.put("name", "test_name");
    out.println(json.toString());
    out.flush();
    in.readLine();

    json = new JSONObject();
    json.put("action", "subscribe");
    json.put("name", "test_name");
    out.println(json.toString());
    out.flush();
    data = in.readLine();
    jsonObject = new JSONObject(data);
    assertEquals("ok", jsonObject.get("status"));

    json = new JSONObject();
    json.put("action", "subscribe");
    json.put("name", "test_name");
    out2.println(json.toString());
    out2.flush();
    data = in2.readLine();
    jsonObject = new JSONObject(data);
    assertEquals("ok", jsonObject.get("status"));

    json = new JSONObject();
    json.put("action", "unsubscribe");
    json.put("name", "test_name");
    out2.println(json.toString());
    out2.flush();
    data = in2.readLine();
    jsonObject = new JSONObject(data);
    assertEquals("ok", jsonObject.get("status"));

    server.stopServer();
}

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From source file:com.cws.esolutions.core.utils.NetworkUtils.java

/**
 * Creates an telnet connection to a target host and port number. Silently
 * succeeds if no issues are encountered, if so, exceptions are logged and
 * re-thrown back to the requestor./*from w  w  w  . j  a  va  2  s . c  o m*/
 *
 * If an exception is thrown during the <code>socket.close()</code> operation,
 * it is logged but NOT re-thrown. It's not re-thrown because it does not indicate
 * a connection failure (indeed, it means the connection succeeded) but it is
 * logged because continued failures to close the socket could result in target
 * system instability.
 * 
 * @param hostName - The target host to make the connection to
 * @param portNumber - The port number to attempt the connection on
 * @param timeout - The timeout for the connection
 * @throws UtilityException {@link com.cws.esolutions.core.utils.exception.UtilityException} if an error occurs processing
 */
public static final synchronized void executeTelnetRequest(final String hostName, final int portNumber,
        final int timeout) throws UtilityException {
    final String methodName = NetworkUtils.CNAME
            + "#executeTelnetRequest(final String hostName, final int portNumber, final int timeout) throws UtilityException";

    if (DEBUG) {
        DEBUGGER.debug(methodName);
        DEBUGGER.debug(hostName);
        DEBUGGER.debug("portNumber: {}", portNumber);
        DEBUGGER.debug("timeout: {}", timeout);
    }

    Socket socket = null;

    try {
        synchronized (new Object()) {
            if (InetAddress.getByName(hostName) == null) {
                throw new UnknownHostException("No host was found in DNS for the given name: " + hostName);
            }

            InetSocketAddress socketAddress = new InetSocketAddress(hostName, portNumber);

            socket = new Socket();
            socket.setSoTimeout((int) TimeUnit.SECONDS.toMillis(timeout));
            socket.setSoLinger(false, 0);
            socket.setKeepAlive(false);
            socket.connect(socketAddress, (int) TimeUnit.SECONDS.toMillis(timeout));

            if (!(socket.isConnected())) {
                throw new ConnectException("Failed to connect to host " + hostName + " on port " + portNumber);
            }

            PrintWriter pWriter = new PrintWriter(socket.getOutputStream(), true);

            pWriter.println(NetworkUtils.TERMINATE_TELNET + NetworkUtils.CRLF);

            pWriter.flush();
            pWriter.close();
        }
    } catch (ConnectException cx) {
        throw new UtilityException(cx.getMessage(), cx);
    } catch (UnknownHostException ux) {
        throw new UtilityException(ux.getMessage(), ux);
    } catch (SocketException sx) {
        throw new UtilityException(sx.getMessage(), sx);
    } catch (IOException iox) {
        throw new UtilityException(iox.getMessage(), iox);
    } finally {
        try {
            if ((socket != null) && (!(socket.isClosed()))) {
                socket.close();
            }
        } catch (IOException iox) {
            // log it - this could cause problems later on
            ERROR_RECORDER.error(iox.getMessage(), iox);
        }
    }
}

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From source file:org.wso2.carbon.andes.internal.QpidServiceComponent.java

/**
 * check whether the tcp port has started. some times the server started thread may return
 * before Qpid server actually bind to the tcp port. in that case there are some connection
 * time out issues./*from   ww w. j  a v  a  2  s.  c  om*/
 *
 * @throws ConfigurationException
 */
private void startAMQPServer() throws ConfigurationException {

    boolean isServerStarted = false;
    int port;
    if (qpidServiceImpl.getIfSSLOnly()) {
        port = qpidServiceImpl.getAMQPSSLPort();
    } else {
        port = qpidServiceImpl.getAMQPPort();
    }

    if (AndesConfigurationManager.<Boolean>readValue(AndesConfiguration.TRANSPORTS_AMQP_ENABLED)) {
        while (!isServerStarted) {
            Socket socket = null;
            try {
                InetAddress address = InetAddress.getByName(getAMQPTransportBindAddress());
                socket = new Socket(address, port);
                log.info("AMQP Host Address : " + address.getHostAddress() + " Port : " + port);
                isServerStarted = socket.isConnected();
                if (isServerStarted) {
                    log.info("Successfully connected to AMQP server " + "on port " + port);
                }
            } catch (IOException e) {
                log.error("Wait until Qpid server starts on port " + port, e);
                try {
                    Thread.sleep(500);
                } catch (InterruptedException ignore) {
                    // Ignore
                }
            } finally {
                try {
                    if ((socket != null) && (socket.isConnected())) {
                        socket.close();
                    }
                } catch (IOException e) {
                    log.error("Can not close the socket which is used to check the server " + "status ", e);
                }
            }
        }
    } else {
        log.warn("AMQP Transport is disabled as per configuration.");
    }
}

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