Java Code Examples for java.net.Socket#close()

/**
 * @throws Exception
 */

private void shutdown() {

    String address = "localhost";

    Integer shutdownPort = Integer.valueOf(PropertiesLoader.getProperty(Constants.PARAM_JOBX_SHUTDOWN_KEY));

    // Stop the existing server
    try {
        Socket socket = new Socket(address, shutdownPort);
        OutputStream stream = socket.getOutputStream();
        for (int i = 0; i < shutdown.length(); i++) {
            stream.write(shutdown.charAt(i));
        }
        stream.flush();
        socket.close();
    } catch (Exception e) {
        if (logger.isErrorEnabled()) {
            logger.error("[JobX] Agent.stop error:{} ", e);
        }
        System.exit(1);
    }
}
 

public static String sendReq(String host, int port, String req) {

    try {
      Socket clientSocket = new Socket(host, port);
      DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
      outToServer.writeBytes(req + '\n');

      BufferedReader inFromServer =
          new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));

      String response = inFromServer.readLine();
      clientSocket.close();

      return response;

    } catch (IOException e) {
      e.printStackTrace();
    }

    return null;
  }
 

@Override
public void run() {
    logger.info("starting thread: {}", getName());
    Socket accept;
    try {
        accept = socket.accept();
        BufferedReader reader = new BufferedReader(new InputStreamReader(accept.getInputStream()));
        reader.readLine();
        logger.info("shutting down thread: {}", getName());
        stoppable.stop();
        accept.close();
        socket.close();
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}
 

private static Connection fromSocket(final Socket socket) throws IOException {

    return new Connection() {

      @Override
      public InputStream in() throws IOException {
        return socket.getInputStream();
      }

      @Override
      public OutputStream out() throws IOException {
        return socket.getOutputStream();
      }

      @Override
      public void close() throws IOException {
        socket.close();
      }
    };
  }
 

private static Callable<Boolean> portChecker(boolean freeCheck, int port) {
    return () -> {
        Socket socket = new Socket();
        socket.setSoTimeout(500);
        try {
            System.out.println("Trying to connect to port " + port);
            socket.connect(new InetSocketAddress(port), 500);
            socket.close();
            System.out.println("Was able to connect to port " + port);
            return !freeCheck;
        } catch (SocketTimeoutException | ConnectException ignored) {
            System.out.println("Was NOT able to connect to port " + port);
            return freeCheck;
        }
    };
}
 

@Override
public Long call() {
    Integer privatePort = entity.getThriftPort();
    if (privatePort == null) return -1L;
    
    HostAndPort hp = BrooklynAccessUtils.getBrooklynAccessibleAddress(entity, privatePort);

    try {
        long start = System.currentTimeMillis();
        Socket s = new Socket(hp.getHostText(), hp.getPort());
        s.close();
        long latency = System.currentTimeMillis() - start;
        return latency;
    } catch (Exception e) {
        Exceptions.propagateIfFatal(e);
        if (log.isDebugEnabled())
            log.debug("Cassandra thrift port poll failure: "+e);
        return -1L;
    }
}
 

@Test
public void testPinnedDomainSuccessLeaf() throws IOException {
    String serverHostname = "datatheorem.com";
    TestableTrustKit.initializeWithNetworkSecurityConfiguration(
            InstrumentationRegistry.getInstrumentation().getContext(), mockReporter);

    // Create a TrustKit SocketFactory and ensure the connection succeeds
    SSLSocketFactory test = TestableTrustKit.getInstance().getSSLSocketFactory(serverHostname);
    Socket socket = test.createSocket(serverHostname, 443);
    socket.getInputStream();

    assertTrue(socket.isConnected());
    socket.close();

    // Ensure the background reporter was NOT called
    verify(mockReporter, never()).pinValidationFailed(
            eq(serverHostname),
            eq(0),
            (List<X509Certificate>) org.mockito.Matchers.isNotNull(),
            (List<X509Certificate>) org.mockito.Matchers.isNotNull(),
            eq(TestableTrustKit.getInstance().getConfiguration().getPolicyForHostname(serverHostname)),
            eq(PinningValidationResult.FAILED)
    );
}
 

protected void closeSocket(Socket socketToClose) {
    if (socketToClose == null) {
        return;
    }

    try {
        socketToClose.close();

    } catch (IOException ioe) {
        if (!"Socket is closed".equalsIgnoreCase(ioe.getMessage())) {
            throw new SyslogRuntimeException(ioe);
        }

    } finally {
        if (socketToClose == this.socket) {
            this.socket = null;
        }
    }
}
 

byte[] readByte() throws IOException {
    ServerSocket ss = new ServerSocket(12013);
    System.out.println("Server: Waiting for Connection");
    Socket s = ss.accept();
    System.out.println("Server: Connection Reached");

    s = ss.accept();
    DataInputStream dIn = new DataInputStream(s.getInputStream());
    byte[] ret = new byte[0];
    //dIn.readInt();
    int length = dIn.readInt();
    System.out.println("Receiving "+length+" Bytes");
    if(length > 0) {
        ret = new byte[length];
        dIn.readFully(ret, 0, ret.length);
    }

    s.close();
    ss.close();
    return ret;
}
 

private void doMessage ( Socket s, DataInputStream in, DataOutputStream out ) throws Exception {
    System.err.println("Reading message...");

    int op = in.read();

    switch ( op ) {
    case TransportConstants.Call:
        // service incoming RMI call
        doCall(in, out);
        break;

    case TransportConstants.Ping:
        // send ack for ping
        out.writeByte(TransportConstants.PingAck);
        break;

    case TransportConstants.DGCAck:
        UID.read(in);
        break;

    default:
        throw new IOException("unknown transport op " + op);
    }

    s.close();
}
 

/**
 * Closes 'socket', ignoring any exceptions. Does nothing if 'socket' is null.
 */
public static void closeQuietly(Socket socket) {
    if (socket != null) {
        try {
            socket.close();
        } catch (Exception ignored) {
        }
    }
}
 

@Override
public void shutdown() throws IOException {
    final Socket socket = this.socketHolder.getAndSet(null);
    if (socket != null) {
        // force abortive close (RST)
        try {
            socket.setSoLinger(true, 0);
        } catch (final IOException ex) {
        } finally {
            socket.close();
        }
    }
}
 

public static void closeQuietly(Socket closeable) {
    if (closeable == null)
        return;

    try {
        closeable.close();
    } catch (IOException e) {
        log.debug(e.getMessage());
    }
}
 

void doServerSide() throws Exception {
    ServerSocket serverSock = new ServerSocket(serverPort);

    // signal client, it's ready to accecpt connection
    serverPort = serverSock.getLocalPort();
    serverReady = true;

    // accept a connection
    Socket socket = serverSock.accept();
    System.out.println("Server: Connection accepted");

    InputStream is = socket.getInputStream();
    OutputStream os = socket.getOutputStream();

    // read the bindRequest
    while (is.read() != -1) {
        // ignore
        is.skip(is.available());
        break;
    }

    byte[] bindResponse = {0x30, 0x0C, 0x02, 0x01, 0x01, 0x61, 0x07, 0x0A,
                           0x01, 0x00, 0x04, 0x00, 0x04, 0x00};
    // write bindResponse
    os.write(bindResponse);
    os.flush();

    // ignore any more request.
    while (is.read() != -1) {
        // ignore
        is.skip(is.available());
    }

    is.close();
    os.close();
    socket.close();
    serverSock.close();
}
 

void readFullPic() throws IOException {
    ServerSocket ss = new ServerSocket(12013);
    System.out.println("Server: Waiting for Connection");
    Socket s = ss.accept();
    System.out.println("Server: Connection Reached");

    String line, message = "";
    BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));

    System.out.println("Reading Metadata");
    while((line = br.readLine())!= null) {
        if(!line.equals("over")) {
            System.out.println(line);
            message += line+"\n";
        } else {
            System.out.println("OVER");
            break;
        }
    }
    System.out.println("Metadata Done:");
    System.out.println(message);
    s.close();

    s = ss.accept();
    DataInputStream dIn = new DataInputStream(s.getInputStream());
    byte[] ret = new byte[0];

    int length = dIn.readInt();
    System.out.println("Receiving "+length+" Bytes");
    if(length > 0) {
        ret = new byte[length];
        dIn.readFully(ret, 0, ret.length);
    }

    System.out.println(message);
    s.close();
    ss.close();
    writeByte(ret);
    writeYaml(message);
}
 

/**
 * Closes the socket ignoring {@link IOException}
 *
 * @param sock the Socket to close
 */
public static void closeSocket(Socket sock) {
  if (sock != null) {
    try {
      sock.close();
    } catch (IOException ignored) {
    }
  }
}
 

@Test
public void testSocketSourceSimpleOutput() throws Exception {
	ServerSocket server = new ServerSocket(0);
	Socket channel = null;

	try {
		SocketTextStreamFunction source = new SocketTextStreamFunction(LOCALHOST, server.getLocalPort(), "\n", 0);

		SocketSourceThread runner = new SocketSourceThread(source, "test1", "check");
		runner.start();

		channel = server.accept();
		OutputStreamWriter writer = new OutputStreamWriter(channel.getOutputStream());

		writer.write("test1\n");
		writer.write("check\n");
		writer.flush();
		runner.waitForNumElements(2);

		runner.cancel();
		runner.interrupt();

		runner.waitUntilDone();

		channel.close();
	}
	finally {
		if (channel != null) {
			IOUtils.closeQuietly(channel);
		}
		IOUtils.closeQuietly(server);
	}
}
 

/**
 * Reproduces the issue #1600
 */
@Test
public void testFlushCloseReentrance() throws Exception {
    NioEventLoopGroup group = new NioEventLoopGroup(1);
    try {
        final Queue<ChannelFuture> futures = new LinkedBlockingQueue<ChannelFuture>();

        ServerBootstrap sb = new ServerBootstrap();
        sb.group(group).channel(NioServerSocketChannel.class);
        sb.childOption(ChannelOption.SO_SNDBUF, 1024);
        sb.childHandler(new ChannelInboundHandlerAdapter() {
            @Override
            public void channelActive(ChannelHandlerContext ctx) throws Exception {
                // Write a large enough data so that it is split into two loops.
                futures.add(ctx.write(
                        ctx.alloc().buffer().writeZero(1048576)).addListener(ChannelFutureListener.CLOSE));
                futures.add(ctx.write(ctx.alloc().buffer().writeZero(1048576)));
                ctx.flush();
                futures.add(ctx.write(ctx.alloc().buffer().writeZero(1048576)));
                ctx.flush();
            }
        });

        SocketAddress address = sb.bind(0).sync().channel().localAddress();

        Socket s = new Socket(NetUtil.LOCALHOST, ((InetSocketAddress) address).getPort());

        InputStream in = s.getInputStream();
        byte[] buf = new byte[8192];
        for (;;) {
            if (in.read(buf) == -1) {
                break;
            }

            // Wait a little bit so that the write attempts are split into multiple flush attempts.
            Thread.sleep(10);
        }
        s.close();

        assertThat(futures.size(), is(3));
        ChannelFuture f1 = futures.poll();
        ChannelFuture f2 = futures.poll();
        ChannelFuture f3 = futures.poll();
        assertThat(f1.isSuccess(), is(true));
        assertThat(f2.isDone(), is(true));
        assertThat(f2.isSuccess(), is(false));
        assertThat(f2.cause(), is(instanceOf(ClosedChannelException.class)));
        assertThat(f3.isDone(), is(true));
        assertThat(f3.isSuccess(), is(false));
        assertThat(f3.cause(), is(instanceOf(ClosedChannelException.class)));
    } finally {
        group.shutdownGracefully().sync();
    }
}
 

public void run()
{
  ServerSocket socket = this.socket;
  Socket client = null;
  System.out.println("starting up");
  
  while (!done) {

    try {

      while (transactionManager.activeCount() >= httpConfig
          .getMaxConnections()) {
        try {
          Thread.sleep(50);
          if (done) {
            break;
          }
        } catch (final Exception e) {
        }
      }

      if (!done) {
        client = socket.accept();
        if (done) {
          client.close();
          break;
        }
      }
      
      transactionManager.startTransaction(client, httpConfig);

    } catch (final InterruptedIOException iioe) {
      if (!done && log.doDebug()) {
        log.debug("Communication error on "
                  + (host != null ? (host + ":") : "") + port, iioe);
      }
    } catch (final IOException ioe) {
      if (!done && log.doDebug()) {
        log.debug("Communication error on "
                  + (host != null ? (host + ":") : "") + port, ioe);
      }
    } catch (final ThreadDeath td) {
      throw td;
    } catch (final Throwable t) {
      if (!done && log.doDebug()) {
        log.debug("Internal error on" + (host != null ? (host + ":") : "")
                  + port, t);
      }
    }

  }

  try {
    if (socket != null) {
      socket.close();
    }
  } catch (final IOException ignore) {
  }
  socket = null;
}
 

void doServerSide() throws Exception {
    if (VERBOSE) {
        System.out.println("Starting server");
    }

    /*
     * Setup the SSL stuff
     */
    SSLSocketFactory sslsf =
         (SSLSocketFactory) SSLSocketFactory.getDefault();

    ServerSocket serverSocket = new ServerSocket(SERVER_PORT);

    SERVER_PORT = serverSocket.getLocalPort();

    /*
     * Signal Client, we're ready for his connect.
     */
    serverReady = true;

    Socket plainSocket = serverSocket.accept();
    InputStream is = plainSocket.getInputStream();
    OutputStream os = plainSocket.getOutputStream();

    expectValue(is.read(), PLAIN_CLIENT_VAL, "Server");

    os.write(PLAIN_SERVER_VAL);
    os.flush();

    for (int i = 1; i <= NUM_ITERATIONS; i++) {
        if (VERBOSE) {
            System.out.println("=================================");
            System.out.println("Server Iteration #" + i);
        }

        SSLSocket ssls = (SSLSocket) sslsf.createSocket(plainSocket,
            SERVER_NAME, plainSocket.getPort(), false);

        ssls.setUseClientMode(false);
        InputStream sslis = ssls.getInputStream();
        OutputStream sslos = ssls.getOutputStream();

        expectValue(sslis.read(), TLS_CLIENT_VAL, "Server");

        sslos.write(TLS_SERVER_VAL);
        sslos.flush();

        sslis.close();
        sslos.close();
        ssls.close();

        if (VERBOSE) {
            System.out.println("TLS socket is closed");
        }
    }

    expectValue(is.read(), PLAIN_CLIENT_VAL, "Server");

    os.write(PLAIN_SERVER_VAL);
    os.flush();

    is.close();
    os.close();
    plainSocket.close();

    if (VERBOSE) {
        System.out.println("Server plain socket is closed");
    }
}