public E take() throws InterruptedException {
    Node<E> x;
    final AtomicInteger count = this.count;
    final ReentrantLock takeLock = this.takeLock;
    takeLock.lockInterruptibly();
    try {
      try {
        while (count.get() == 0) notEmpty.await();
      } catch (InterruptedException ie) {
        notEmpty.signal(); // propagate to a non-interrupted thread
        throw ie;
      }

      x = extract();
      if (count.getAndDecrement() > 1) notEmpty.signal();
    } finally {
      takeLock.unlock();
    }

    E result = x.item;

    // temporary clearence
    x.item = null;
    x.next = null;

    return result;
  }
  public E poll() {
    final AtomicInteger count = this.count;
    if (count.get() == 0) return null;

    Node<E> x = null;
    final ReentrantLock takeLock = this.takeLock;
    takeLock.lock();

    try {
      if (count.get() > 0) {
        x = extract();
        if (count.getAndDecrement() > 1) notEmpty.signal();
      }
    } finally {
      takeLock.unlock();
    }

    if (x != null) {
      E result = x.item;

      // temporary clearence
      x.item = null;
      x.next = null;

      return result;
    }

    return null;
  }
 @Override
 public Object invoke(MethodInvocation invocation) throws Throwable {
   try {
     free.getAndIncrement();
     return invocation.proceed();
   } finally {
     free.getAndDecrement();
   }
 }
 public int allocateRequestId(@NotNull Channel channel) {
   int requestId = requestIdCounter.getAndIncrement();
   if (requestId >= Short.MAX_VALUE) {
     requestIdCounter.set(0);
     requestId = requestIdCounter.getAndDecrement();
   }
   requests.put(requestId, channel);
   return requestId;
 }
    public byte[] readFully(InputStream st) {
        ByteArrayOutputStream stream = new ByteArrayOutputStream();

        int read;
        try {
            while (readLen.getAndDecrement() > 0 && (read = st.read()) != -1) {
                stream.write(read);
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

        return stream.toByteArray();
    }
Esempio n. 6
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    private synchronized void removeTaskAttempt(int volumeId, TaskAttempt taskAttempt) {
      if (!unassignedTaskForEachVolume.containsKey(volumeId)) return;

      LinkedHashSet<TaskAttempt> tasks = unassignedTaskForEachVolume.get(volumeId);
      if (tasks.remove(taskAttempt)) {
        remainTasksNum.getAndDecrement();
      }

      if (tasks.isEmpty()) {
        unassignedTaskForEachVolume.remove(volumeId);
        if (volumeId > REMOTE) {
          diskVolumeLoads.remove(volumeId);
        }
      }
    }
  public void run() {
    Session session;

    log.info(this + " using connection " + connection);

    try {
      session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      MessageProducer producer = session.createProducer(destination);

      while (true) {
        int remaining = remainingToSend.getAndDecrement();

        if (remaining <= 0) {
          break;
        }

        // Message m = session.createTextMessage("test");
        Message m = session.createTextMessage("test-" + System.currentTimeMillis());
        producer.send(m);

        remaining--;
        if (remaining < 0) {
          remaining = 0;
        }

        if (sleepBetweenSendsMs > 0) {

          log.info(
              "sleeping "
                  + (sleepBetweenSendsMs / 1000)
                  + " second(s) after sending the message, "
                  + remaining
                  + " message(s) remaining ...");
          Thread.sleep(sleepBetweenSendsMs);
        }

        messagesSent.incrementAndGet();
      }
    } catch (Exception e) {
      log.info("thread " + Thread.currentThread().getName() + " failed: " + e);
    } finally {
      try {
        barrier.await();
      } catch (Exception e) {
        log.info("failed to wait on barrier: " + e);
      }
    }
  }
Esempio n. 8
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  public static GridView getGridView(boolean top) {
    GridView gridView = new GridView();
    gridView.setViewId("viewId" + counter.getAndDecrement());
    gridView.setTitle("请假单");
    gridView.addCell(new PropCell("标题一", "值一"));

    RowCell rowCell = new RowCell();
    rowCell.addPropCell(new PropCell("标题一", "值一"));
    rowCell.addPropCell(new PropCell("标题二", "值二"));
    gridView.addCell(rowCell);

    gridView.addCell(new PropCell("标题二", "值二"));

    IteratorCell iteratorCell = new IteratorCell();
    ArrayList<PropCell> propCells = new ArrayList<PropCell>();
    propCells.add(new PropCell("标题一", "值一"));
    propCells.add(new PropCell("标题二", "值二"));
    propCells.add(new PropCell("标题三", "值三"));
    iteratorCell.addPropCells(propCells);

    propCells = new ArrayList<PropCell>();
    propCells.add(new PropCell("标题一", "值一"));
    propCells.add(new PropCell("标题二", "值二"));
    propCells.add(new PropCell("标题三", "值三"));
    iteratorCell.addPropCells(propCells);
    gridView.addCell(iteratorCell);

    if (top) {
      GridView gridView2 = getGridView(false);
      gridView2.setTitle("明细一");
      gridView.addGridView(gridView2);
      gridView2 = getGridView(false);
      gridView2.setTitle("明细二");
      gridView.addGridView(gridView2);
    }
    return gridView;
  }
Esempio n. 9
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  public int prevStatementIndex(Class<?> clazz) {
    AtomicInteger atomic = statementIndexes.get(clazz);
    if (atomic == null) statementIndexes.put(clazz, atomic = new AtomicInteger());

    return atomic.getAndDecrement();
  }
Esempio n. 10
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  @Override
  public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    if (msg instanceof SpdyDataFrame) {

      /*
       * SPDY Data frame processing requirements:
       *
       * If an endpoint receives a data frame for a Stream-ID which is not open
       * and the endpoint has not sent a GOAWAY frame, it must issue a stream error
       * with the error code INVALID_STREAM for the Stream-ID.
       *
       * If an endpoint which created the stream receives a data frame before receiving
       * a SYN_REPLY on that stream, it is a protocol error, and the recipient must
       * issue a stream error with the getStatus code PROTOCOL_ERROR for the Stream-ID.
       *
       * If an endpoint receives multiple data frames for invalid Stream-IDs,
       * it may close the session.
       *
       * If an endpoint refuses a stream it must ignore any data frames for that stream.
       *
       * If an endpoint receives a data frame after the stream is half-closed from the
       * sender, it must send a RST_STREAM frame with the getStatus STREAM_ALREADY_CLOSED.
       *
       * If an endpoint receives a data frame after the stream is closed, it must send
       * a RST_STREAM frame with the getStatus PROTOCOL_ERROR.
       */
      SpdyDataFrame spdyDataFrame = (SpdyDataFrame) msg;
      int streamId = spdyDataFrame.streamId();

      int deltaWindowSize = -1 * spdyDataFrame.content().readableBytes();
      int newSessionWindowSize =
          spdySession.updateReceiveWindowSize(SPDY_SESSION_STREAM_ID, deltaWindowSize);

      // Check if session window size is reduced beyond allowable lower bound
      if (newSessionWindowSize < 0) {
        issueSessionError(ctx, SpdySessionStatus.PROTOCOL_ERROR);
        return;
      }

      // Send a WINDOW_UPDATE frame if less than half the session window size remains
      if (newSessionWindowSize <= initialSessionReceiveWindowSize / 2) {
        int sessionDeltaWindowSize = initialSessionReceiveWindowSize - newSessionWindowSize;
        spdySession.updateReceiveWindowSize(SPDY_SESSION_STREAM_ID, sessionDeltaWindowSize);
        SpdyWindowUpdateFrame spdyWindowUpdateFrame =
            new DefaultSpdyWindowUpdateFrame(SPDY_SESSION_STREAM_ID, sessionDeltaWindowSize);
        ctx.writeAndFlush(spdyWindowUpdateFrame);
      }

      // Check if we received a data frame for a Stream-ID which is not open

      if (!spdySession.isActiveStream(streamId)) {
        spdyDataFrame.release();
        if (streamId <= lastGoodStreamId) {
          issueStreamError(ctx, streamId, SpdyStreamStatus.PROTOCOL_ERROR);
        } else if (!sentGoAwayFrame) {
          issueStreamError(ctx, streamId, SpdyStreamStatus.INVALID_STREAM);
        }
        return;
      }

      // Check if we received a data frame for a stream which is half-closed

      if (spdySession.isRemoteSideClosed(streamId)) {
        spdyDataFrame.release();
        issueStreamError(ctx, streamId, SpdyStreamStatus.STREAM_ALREADY_CLOSED);
        return;
      }

      // Check if we received a data frame before receiving a SYN_REPLY
      if (!isRemoteInitiatedId(streamId) && !spdySession.hasReceivedReply(streamId)) {
        spdyDataFrame.release();
        issueStreamError(ctx, streamId, SpdyStreamStatus.PROTOCOL_ERROR);
        return;
      }

      /*
       * SPDY Data frame flow control processing requirements:
       *
       * Recipient should not send a WINDOW_UPDATE frame as it consumes the last data frame.
       */

      // Update receive window size
      int newWindowSize = spdySession.updateReceiveWindowSize(streamId, deltaWindowSize);

      // Window size can become negative if we sent a SETTINGS frame that reduces the
      // size of the transfer window after the peer has written data frames.
      // The value is bounded by the length that SETTINGS frame decrease the window.
      // This difference is stored for the session when writing the SETTINGS frame
      // and is cleared once we send a WINDOW_UPDATE frame.
      if (newWindowSize < spdySession.getReceiveWindowSizeLowerBound(streamId)) {
        spdyDataFrame.release();
        issueStreamError(ctx, streamId, SpdyStreamStatus.FLOW_CONTROL_ERROR);
        return;
      }

      // Window size became negative due to sender writing frame before receiving SETTINGS
      // Send data frames upstream in initialReceiveWindowSize chunks
      if (newWindowSize < 0) {
        while (spdyDataFrame.content().readableBytes() > initialReceiveWindowSize) {
          SpdyDataFrame partialDataFrame =
              new DefaultSpdyDataFrame(
                  streamId, spdyDataFrame.content().readSlice(initialReceiveWindowSize).retain());
          ctx.writeAndFlush(partialDataFrame);
        }
      }

      // Send a WINDOW_UPDATE frame if less than half the stream window size remains
      if (newWindowSize <= initialReceiveWindowSize / 2 && !spdyDataFrame.isLast()) {
        int streamDeltaWindowSize = initialReceiveWindowSize - newWindowSize;
        spdySession.updateReceiveWindowSize(streamId, streamDeltaWindowSize);
        SpdyWindowUpdateFrame spdyWindowUpdateFrame =
            new DefaultSpdyWindowUpdateFrame(streamId, streamDeltaWindowSize);
        ctx.writeAndFlush(spdyWindowUpdateFrame);
      }

      // Close the remote side of the stream if this is the last frame
      if (spdyDataFrame.isLast()) {
        halfCloseStream(streamId, true, ctx.newSucceededFuture());
      }

    } else if (msg instanceof SpdySynStreamFrame) {

      /*
       * SPDY SYN_STREAM frame processing requirements:
       *
       * If an endpoint receives a SYN_STREAM with a Stream-ID that is less than
       * any previously received SYN_STREAM, it must issue a session error with
       * the getStatus PROTOCOL_ERROR.
       *
       * If an endpoint receives multiple SYN_STREAM frames with the same active
       * Stream-ID, it must issue a stream error with the getStatus code PROTOCOL_ERROR.
       *
       * The recipient can reject a stream by sending a stream error with the
       * getStatus code REFUSED_STREAM.
       */

      SpdySynStreamFrame spdySynStreamFrame = (SpdySynStreamFrame) msg;
      int streamId = spdySynStreamFrame.streamId();

      // Check if we received a valid SYN_STREAM frame
      if (spdySynStreamFrame.isInvalid()
          || !isRemoteInitiatedId(streamId)
          || spdySession.isActiveStream(streamId)) {
        issueStreamError(ctx, streamId, SpdyStreamStatus.PROTOCOL_ERROR);
        return;
      }

      // Stream-IDs must be monotonically increasing
      if (streamId <= lastGoodStreamId) {
        issueSessionError(ctx, SpdySessionStatus.PROTOCOL_ERROR);
        return;
      }

      // Try to accept the stream
      byte priority = spdySynStreamFrame.priority();
      boolean remoteSideClosed = spdySynStreamFrame.isLast();
      boolean localSideClosed = spdySynStreamFrame.isUnidirectional();
      if (!acceptStream(streamId, priority, remoteSideClosed, localSideClosed)) {
        issueStreamError(ctx, streamId, SpdyStreamStatus.REFUSED_STREAM);
        return;
      }

    } else if (msg instanceof SpdySynReplyFrame) {

      /*
       * SPDY SYN_REPLY frame processing requirements:
       *
       * If an endpoint receives multiple SYN_REPLY frames for the same active Stream-ID
       * it must issue a stream error with the getStatus code STREAM_IN_USE.
       */

      SpdySynReplyFrame spdySynReplyFrame = (SpdySynReplyFrame) msg;
      int streamId = spdySynReplyFrame.streamId();

      // Check if we received a valid SYN_REPLY frame
      if (spdySynReplyFrame.isInvalid()
          || isRemoteInitiatedId(streamId)
          || spdySession.isRemoteSideClosed(streamId)) {
        issueStreamError(ctx, streamId, SpdyStreamStatus.INVALID_STREAM);
        return;
      }

      // Check if we have received multiple frames for the same Stream-ID
      if (spdySession.hasReceivedReply(streamId)) {
        issueStreamError(ctx, streamId, SpdyStreamStatus.STREAM_IN_USE);
        return;
      }

      spdySession.receivedReply(streamId);

      // Close the remote side of the stream if this is the last frame
      if (spdySynReplyFrame.isLast()) {
        halfCloseStream(streamId, true, ctx.newSucceededFuture());
      }

    } else if (msg instanceof SpdyRstStreamFrame) {

      /*
       * SPDY RST_STREAM frame processing requirements:
       *
       * After receiving a RST_STREAM on a stream, the receiver must not send
       * additional frames on that stream.
       *
       * An endpoint must not send a RST_STREAM in response to a RST_STREAM.
       */

      SpdyRstStreamFrame spdyRstStreamFrame = (SpdyRstStreamFrame) msg;
      removeStream(spdyRstStreamFrame.streamId(), ctx.newSucceededFuture());

    } else if (msg instanceof SpdySettingsFrame) {

      SpdySettingsFrame spdySettingsFrame = (SpdySettingsFrame) msg;

      int settingsMinorVersion =
          spdySettingsFrame.getValue(SpdySettingsFrame.SETTINGS_MINOR_VERSION);
      if (settingsMinorVersion >= 0 && settingsMinorVersion != minorVersion) {
        // Settings frame had the wrong minor version
        issueSessionError(ctx, SpdySessionStatus.PROTOCOL_ERROR);
        return;
      }

      int newConcurrentStreams =
          spdySettingsFrame.getValue(SpdySettingsFrame.SETTINGS_MAX_CONCURRENT_STREAMS);
      if (newConcurrentStreams >= 0) {
        remoteConcurrentStreams = newConcurrentStreams;
      }

      // Persistence flag are inconsistent with the use of SETTINGS to communicate
      // the initial window size. Remove flags from the sender requesting that the
      // value be persisted. Remove values that the sender indicates are persisted.
      if (spdySettingsFrame.isPersisted(SpdySettingsFrame.SETTINGS_INITIAL_WINDOW_SIZE)) {
        spdySettingsFrame.removeValue(SpdySettingsFrame.SETTINGS_INITIAL_WINDOW_SIZE);
      }
      spdySettingsFrame.setPersistValue(SpdySettingsFrame.SETTINGS_INITIAL_WINDOW_SIZE, false);

      int newInitialWindowSize =
          spdySettingsFrame.getValue(SpdySettingsFrame.SETTINGS_INITIAL_WINDOW_SIZE);
      if (newInitialWindowSize >= 0) {
        updateInitialSendWindowSize(newInitialWindowSize);
      }

    } else if (msg instanceof SpdyPingFrame) {

      /*
       * SPDY PING frame processing requirements:
       *
       * Receivers of a PING frame should send an identical frame to the sender
       * as soon as possible.
       *
       * Receivers of a PING frame must ignore frames that it did not initiate
       */

      SpdyPingFrame spdyPingFrame = (SpdyPingFrame) msg;

      if (isRemoteInitiatedId(spdyPingFrame.id())) {
        ctx.writeAndFlush(spdyPingFrame);
        return;
      }

      // Note: only checks that there are outstanding pings since uniqueness is not enforced
      if (pings.get() == 0) {
        return;
      }
      pings.getAndDecrement();

    } else if (msg instanceof SpdyGoAwayFrame) {

      receivedGoAwayFrame = true;

    } else if (msg instanceof SpdyHeadersFrame) {

      SpdyHeadersFrame spdyHeadersFrame = (SpdyHeadersFrame) msg;
      int streamId = spdyHeadersFrame.streamId();

      // Check if we received a valid HEADERS frame
      if (spdyHeadersFrame.isInvalid()) {
        issueStreamError(ctx, streamId, SpdyStreamStatus.PROTOCOL_ERROR);
        return;
      }

      if (spdySession.isRemoteSideClosed(streamId)) {
        issueStreamError(ctx, streamId, SpdyStreamStatus.INVALID_STREAM);
        return;
      }

      // Close the remote side of the stream if this is the last frame
      if (spdyHeadersFrame.isLast()) {
        halfCloseStream(streamId, true, ctx.newSucceededFuture());
      }

    } else if (msg instanceof SpdyWindowUpdateFrame) {

      /*
       * SPDY WINDOW_UPDATE frame processing requirements:
       *
       * Receivers of a WINDOW_UPDATE that cause the window size to exceed 2^31
       * must send a RST_STREAM with the getStatus code FLOW_CONTROL_ERROR.
       *
       * Sender should ignore all WINDOW_UPDATE frames associated with a stream
       * after sending the last frame for the stream.
       */

      SpdyWindowUpdateFrame spdyWindowUpdateFrame = (SpdyWindowUpdateFrame) msg;
      int streamId = spdyWindowUpdateFrame.streamId();
      int deltaWindowSize = spdyWindowUpdateFrame.deltaWindowSize();

      // Ignore frames for half-closed streams
      if (streamId != SPDY_SESSION_STREAM_ID && spdySession.isLocalSideClosed(streamId)) {
        return;
      }

      // Check for numerical overflow
      if (spdySession.getSendWindowSize(streamId) > Integer.MAX_VALUE - deltaWindowSize) {
        if (streamId == SPDY_SESSION_STREAM_ID) {
          issueSessionError(ctx, SpdySessionStatus.PROTOCOL_ERROR);
        } else {
          issueStreamError(ctx, streamId, SpdyStreamStatus.FLOW_CONTROL_ERROR);
        }
        return;
      }

      updateSendWindowSize(ctx, streamId, deltaWindowSize);
    }

    ctx.fireChannelRead(msg);
  }
  @Test
  public void testReadBlockedThenWriteBlockedThenReadableThenWritable() throws Exception {
    final AtomicInteger size = new AtomicInteger(1024 * 1024);
    final AtomicReference<Exception> failure = new AtomicReference<>();
    final CountDownLatch latch1 = new CountDownLatch(1);
    final CountDownLatch latch2 = new CountDownLatch(1);
    final AtomicBoolean writeBlocked = new AtomicBoolean();
    init(
        new Interested() {
          @Override
          public void onFillable(EndPoint endPoint, AbstractConnection connection) {
            ByteBuffer input = BufferUtil.allocate(2);
            int read = fill(endPoint, input);

            if (read == 1) {
              byte b = input.get();
              if (b == 1) {
                connection.fillInterested();

                ByteBuffer output = ByteBuffer.allocate(size.get());
                endPoint.write(new Callback() {}, output);

                latch1.countDown();
              } else {
                latch2.countDown();
              }
            } else {
              failure.set(new Exception("Unexpectedly read " + read + " bytes"));
            }
          }

          @Override
          public void onIncompleteFlush() {
            writeBlocked.set(true);
          }

          private int fill(EndPoint endPoint, ByteBuffer buffer) {
            try {
              return endPoint.fill(buffer);
            } catch (IOException x) {
              failure.set(x);
              return 0;
            }
          }
        });

    Socket client = new Socket();
    client.connect(connector.getLocalAddress());
    client.setSoTimeout(5000);

    SocketChannel server = connector.accept();
    server.configureBlocking(false);
    selectorManager.accept(server);

    OutputStream clientOutput = client.getOutputStream();
    clientOutput.write(1);
    clientOutput.flush();
    Assert.assertTrue(latch1.await(5, TimeUnit.SECONDS));

    // We do not read to keep the socket write blocked

    clientOutput.write(2);
    clientOutput.flush();
    Assert.assertTrue(latch2.await(5, TimeUnit.SECONDS));

    // Sleep before reading to allow waking up the server only for read
    Thread.sleep(1000);

    // Now read what was written, waking up the server for write
    InputStream clientInput = client.getInputStream();
    while (size.getAndDecrement() > 0) clientInput.read();

    client.close();

    Assert.assertNull(failure.get());
  }
Esempio n. 12
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 /**
  * Subtract one from this reduction variable and return the previous value.
  *
  * @return Previous value.
  */
 public int getAndDecrement() {
   return myValue.getAndDecrement();
 }
Esempio n. 13
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 /** 1. 将AtomicInteger中维护的int值减一, 再返回原来的值, 也就是 i = i--; */
 public void testGetAndDecrement() {
   AtomicInteger ai = new AtomicInteger();
   System.out.println(ai.getAndDecrement()); // 0
 }
  public HttpUrl pingDSM(ServerInfoJson infoJson) {
    // set timeout to 5 seconds
    final OkHttpClient client =
        defaultClient
            .newBuilder()
            .connectTimeout(5, TimeUnit.SECONDS)
            .readTimeout(5, TimeUnit.SECONDS)
            .build();

    ServerJson serverJson = infoJson.server;
    if (serverJson == null) {
      throw new IllegalArgumentException("serverJson == null");
    }
    ServiceJson serviceJson = infoJson.service;
    if (serviceJson == null) {
      throw new IllegalArgumentException("serviceJson == null");
    }
    int port = serviceJson.port;
    int externalPort = serviceJson.ext_port;

    // internal address(192.168.x.x/10.x.x.x)
    ExecutorService executor = Executors.newFixedThreadPool(10);
    CompletionService<String> internalService = new ExecutorCompletionService<>(executor);
    List<InterfaceJson> ifaces = serverJson._interface;
    AtomicInteger internalCount = new AtomicInteger(0);
    if (ifaces != null) {
      for (final InterfaceJson iface : ifaces) {
        internalService.submit(createPingTask(client, iface.ip, port));
        internalCount.incrementAndGet();

        if (iface.ipv6 != null) {
          for (Ipv6Json ipv6 : iface.ipv6) {
            String ipv6Address = "[" + ipv6.address + "]";
            internalService.submit(createPingTask(client, ipv6Address, port));
            internalCount.incrementAndGet();
          }
        }
      }
    }

    // host address(ddns/fqdn)
    ExecutorCompletionService<String> hostService = new ExecutorCompletionService<>(executor);
    AtomicInteger hostCount = new AtomicInteger(0);
    // ddns
    if (!Util.isEmpty(serverJson.ddns) && !serverJson.ddns.equals("NULL")) {
      hostService.submit(createPingTask(client, serverJson.ddns, port));
      hostCount.incrementAndGet();
    }
    // fqdn
    if (!Util.isEmpty(serverJson.fqdn) && !serverJson.fqdn.equals("NULL")) {
      hostService.submit(createPingTask(client, serverJson.fqdn, port));
      hostCount.incrementAndGet();
    }

    // external address(public ip address)
    ExecutorCompletionService<String> externalService = new ExecutorCompletionService<>(executor);
    AtomicInteger externalCount = new AtomicInteger(0);
    if (serverJson.external != null) {
      String ip = serverJson.external.ip;
      if (!Util.isEmpty(ip)) {
        externalService.submit(
            createPingTask(client, ip, (externalPort != 0) ? externalPort : port));
        externalCount.incrementAndGet();
      }
      String ipv6 = serverJson.external.ipv6;
      if (!Util.isEmpty(ipv6) && !ipv6.equals("::")) {
        externalService.submit(
            createPingTask(client, "[" + ipv6 + "]", (externalPort != 0) ? externalPort : port));
        externalCount.incrementAndGet();
      }
    }

    while (internalCount.getAndDecrement() > 0) {
      try {
        Future<String> future = internalService.take();
        if (future != null) {
          String host = future.get();
          if (!Util.isEmpty(host)) {
            return requestUrl.newBuilder().host(host).port(port).build();
          }
        }
      } catch (InterruptedException | ExecutionException ignored) {
      }
    }

    while (hostCount.getAndDecrement() > 0) {
      try {
        Future<String> future = hostService.take();
        if (future != null) {
          String host = future.get();
          if (!Util.isEmpty(host)) {
            return requestUrl.newBuilder().host(host).port(port).build();
          }
        }
      } catch (InterruptedException | ExecutionException ignored) {
      }
    }

    while (externalCount.getAndDecrement() > 0) {
      try {
        Future<String> future = externalService.take();
        if (future != null) {
          String host = future.get();
          if (!Util.isEmpty(host)) {
            return requestUrl.newBuilder().host(host).port(port).build();
          }
        }
      } catch (InterruptedException | ExecutionException ignored) {
        //				ignored.printStackTrace();
      }
    }

    // shutdown executors
    executor.shutdownNow();

    return null;
  }
 /** getAndDecrement returns previous value and decrements */
 public void testGetAndDecrement() {
   AtomicInteger ai = new AtomicInteger(1);
   assertEquals(1, ai.getAndDecrement());
   assertEquals(0, ai.getAndDecrement());
   assertEquals(-1, ai.getAndDecrement());
 }
Esempio n. 16
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 /** End a Backend API method that writes the database. */
 private void writerEnd() {
   threadWriteCount.getAndDecrement();
   threadTotalCount.getAndDecrement();
 }
Esempio n. 17
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 /** End a Backend API method that reads the database. */
 private void readerEnd() {
   threadTotalCount.getAndDecrement();
 }
Esempio n. 18
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  private static void doParse(
      TreeNode root, ByteBuffer input, AtomicInteger i, AtomicInteger line) {
    TreeNode node = null;
    char c = 0;
    boolean whitespace = true;
    boolean delimit = false;
    for (; i.get() < input.limit(); i.getAndIncrement()) {
      c = (char) input.get(i.get());
      // System.out.printf("[%d]", (int) c);
      switch (c) {
        case '\\':
          {
            delimit = true;
            break;
          }
        case '\n':
          line.getAndIncrement(); // $FALL-THROUGH$
        case '\t':
        case '\r':
        case ' ':
          {
            if (delimit) delimit = false;
            if (!whitespace) {
              whitespace = true;
              if (node != null) {
                node.end = i.get() - 1;
                root.add(node);
                node = null;
              }
            }
            break;
          }
        case '"':
          {
            if (delimit) {
              delimit = false;
              if (whitespace) {
                whitespace = false;
                node = new TreeNode(input, i.get());
                node.line = line.get();
                node.start = i.get();
              }
            } else {
              whitespace = true;
              TreeNode childNode = new TreeNode(input, i.get());
              childNode.line = line.get();
              childNode.start = i.get();

              for (i.getAndIncrement(); i.get() < input.limit(); i.getAndIncrement()) {
                c = (char) input.get(i.get());
                if (!delimit && (c == '"')) {
                  break;
                } else if (c == '\\') {
                  delimit = true;
                } else {
                  delimit = false;
                }
              }
              delimit = false;
              childNode.end = i.get();
              root.add(childNode);
            }
            break;
          }
        case '\'':
          {
            if (delimit) {
              delimit = false;
              if (whitespace) {
                whitespace = false;
                node = new TreeNode(input, i.get());
                node.line = line.get();
                node.start = i.get();
              }
            } else {
              whitespace = true;
              TreeNode childNode = new TreeNode(input, i.get());
              childNode.line = line.get();
              childNode.start = i.get();

              for (i.getAndIncrement(); i.get() < input.limit(); i.getAndIncrement()) {
                c = (char) input.get(i.get());
                if (!delimit && (c == '\'')) {
                  break;
                } else if (c == '\\') {
                  delimit = true;
                } else {
                  delimit = false;
                }
              }
              delimit = false;
              childNode.end = i.get();
              root.add(childNode);
            }
            break;
          }
        case '{':
        case '(':
        case '[':
          {
            if (delimit) {
              delimit = false;
              if (whitespace) {
                whitespace = false;
                node = new TreeNode(input, i.get());
                node.line = line.get();
                node.start = i.get();
              }
            } else {
              whitespace = true;
              if (node != null) {
                node.end = i.get() - 1;
                root.add(node);
                node = null;
              }
              TreeNode childNode = new TreeNode(input, i.get());
              childNode.line = line.get();
              childNode.start = i.get();
              childNode.enter = i.get();
              i.getAndIncrement();
              doParse(childNode, input, i, line);
              childNode.exitLine = line.get();
              childNode.exit = i.get() - 1;
              childNode.end = i.get() - 1;
              root.add(childNode);
              i.getAndDecrement();
            }
            break;
          }
        case '}':
        case ')':
        case ']':
          {
            if (delimit) delimit = false;
            if (node != null) {
              node.end = i.get() - 1;
              root.add(node);
              node = null;
            }
            i.getAndIncrement();
            return;
          }
        case ';':
        case ',':
          {
            if (!whitespace) {
              whitespace = true;
              if (node != null) {
                node.end = i.get() - 1;
                root.add(node);
                node = null;
              }
            }
            node = new TreeNode(input, i.get());
            node.line = line.get();
            node.start = i.get();
            node.end = i.get();
            root.add(node);
            node = null;
            break;
          }
        default:
          {
            if (delimit) delimit = false;
            if (whitespace) {
              whitespace = false;
              node = new TreeNode(input, i.get());
              node.line = line.get();
              node.start = i.get();
            }
            break;
          }
      }
    }
    if ((node != null) && (node.end == -1)) {
      node.end = i.get() - 1; // input.length - 1;
      root.add(node);
    }
  }