try (SmbFileHandleImpl fh = ensureOpen()) {}
    }

    /**
     * @param file
     * @param openFlags
     * @return
     * @throws SmbException
     */
    synchronized SmbFileHandleImpl ensureOpen() throws CIFSException {
        if (this.handle == null || !this.handle.isValid()) {
            // one extra acquire to keep this open till the stream is released

    public int available() throws IOException {
      return (int) min(in.available(), left);
    }

    // it's okay to mark even if mark isn't supported, as reset won't work
    @Override
    public synchronized void mark(int readLimit) {
      in.mark(readLimit);
      mark = left;
    }

    @Override
    public int read() throws IOException {
      if (left == 0) {
        return -1;
      }

As the execution time is consumed mostly by waiting for <abbr title="Input and Output">I/O</abbr> operations, they call them "I/O bound" operations.

It's called "asynchronous" because the computer / program doesn't have to be "synchronized" with the slow task, waiting for the exact moment that the task finishes, while doing nothing, to be able to take the task result and continue the work.

    private final int batchSize = 10;
    private final long batchTimeout = 100;  // 100ms
    
    public void addNotification(WitnessNotification notification) {
        synchronized (pendingNotifications) {
            pendingNotifications.offer(notification);
            
            if (pendingNotifications.size() >= batchSize) {
                processBatch();
            }

    public void deleteBadWord(final String badWord) {
        suggester.indexer().deleteBadWord(badWord);
        refresh();
    }

    /**
     * Refreshes the suggest index.
     */
    public synchronized void refresh() {
        suggester.refresh();
        if (popularWordHelper != null) {
            popularWordHelper.clearCache();
        }
    }

    /**

        .suppressing(suppressForLinkedHashMap())
        .createTestSuite();
  }

  /**
   * Tests regular NavigableMap behavior of synchronizedNavigableMap(treeMap); does not test the
   * fact that it's synchronized.
   */
  public Test testsForSynchronizedNavigableMap() {
    return NavigableMapTestSuiteBuilder.using(
            new TestStringSortedMapGenerator() {
              @Override

                dataMap.put(fessConfig.getIndexFieldDocId(), systemHelper.generateDocId(dataMap));
            }

            languageHelper.updateDocument(dataMap);

            synchronized (docList) {
                docList.add(ingest(paramMap, dataMap));
                final long contentSize = indexingHelper.calculateDocumentSize(dataMap);
                docList.addContentSize(contentSize);

     *            if there is a DCE/RPC protocol error
     * @throws IOException
     *            if there is an I/O error during binding
     */
    public void bind() throws DcerpcException, IOException {
        synchronized (this) {
            try {
                this.state = 1;
                final DcerpcMessage bind = new DcerpcBind(this.binding, this);
                sendrecv(bind);
            } catch (final IOException ioe) {

     *
     * @return The configured SPNEGO authenticator instance
     * @throws SsoLoginException if SPNEGO initialization fails
     */
    protected synchronized org.codelibs.spnego.SpnegoAuthenticator getAuthenticator() {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

     * @param crawlingConfig the crawling configuration to store
     * @return the unique session count ID that can be used to retrieve the stored configuration
     */
    public synchronized String store(final String sessionId, final CrawlingConfig crawlingConfig) {
        final String sessionCountId = sessionId + "-" + count;
        crawlingConfigMap.put(sessionCountId, crawlingConfig);
        count++;