ProjectArtifactsCache.CacheRecord recordArtifacts;
        recordArtifacts = projectArtifactsCache.get(cacheKey);
        if (recordArtifacts == null) {
            synchronized (cacheKey) {
                recordArtifacts = projectArtifactsCache.get(cacheKey);
                if (recordArtifacts == null) {
                    try {

     * @throws DcerpcException if the bind operation fails
     * @throws IOException if an I/O error occurs
     */
    public void bind() throws DcerpcException, IOException {
        synchronized (this) {
            try {
                state = 1;
                final DcerpcMessage bind = new DcerpcBind(binding, this);
                sendrecv(bind);
            } catch (final IOException ioe) {

  private class RecordingPushObserver :
    PushObserver,
    Lockable {
    val events = mutableListOf<Any>()

    @Synchronized fun takeEvent(): Any {
      while (events.isEmpty()) {
        wait()
      }
      return events.removeAt(0)
    }

    @Synchronized override fun onRequest(
      streamId: Int,
      requestHeaders: List<Header>,
    ): Boolean {

    /**
     * Ensures that the file handle is open and returns it.
     *
     * @return the open file handle
     * @throws CIFSException if an error occurs opening the file
     */
    protected synchronized SmbFileHandleImpl ensureOpen() throws CIFSException {
        if (!isOpen()) {
            // one extra acquire to keep this open till the stream is released

   *
   * <p>This method is not type-safe, as it may be called on elements that are not mutually
   * comparable.
   *
   * <p>This method is safe to use even when {@code elements} is a synchronized or concurrent
   * collection that is currently being modified by another thread.
   *
   * @throws ClassCastException if the elements are not mutually comparable

 * since an iteration across all row keys occurs.
 *
 * <p>Note that this implementation is not synchronized. If multiple threads access this table
 * concurrently and one of the threads modifies the table, it must be synchronized externally.
 *
 * @author Jared Levy
 */
@GwtCompatible
class StandardTable<R, C, V> extends AbstractTable<R, C, V> implements Serializable {

            }
        }
    }

    /**
     * Enforces the maximum session cache size.
     */
    protected void enforceMaxSize() {
        final int maxSize = getMaxSessionSize();
        synchronized (sessionCache) {
            if (sessionCache.size() <= maxSize) {
                return;
            }

            final int toRemove = sessionCache.size() - maxSize;

    public org.apache.maven.api.plugin.descriptor.PluginDescriptor getPluginDescriptorV4() {
        if (pluginDescriptorV4 == null) {
            synchronized (this) {
                if (pluginDescriptorV4 == null) {
                    pluginDescriptorV4 = org.apache.maven.api.plugin.descriptor.PluginDescriptor.newBuilder()
                            .namespaceUri(null)

            if (totalProjects <= 1) {
                infoMain(building);
            } else {
                // display progress [i/n]
                int number;
                synchronized (this) {
                    number = ++currentVisitedProjectCount;
                }
                String progress = " [" + number + '/' + totalProjects + ']';

 * since an iteration across all row keys occurs.
 *
 * <p>Note that this implementation is not synchronized. If multiple threads access this table
 * concurrently and one of the threads modifies the table, it must be synchronized externally.
 *
 * @author Jared Levy
 */
@GwtCompatible
class StandardTable<R, C, V> extends AbstractTable<R, C, V> implements Serializable {