// Enqueueing the red task starts a thread because the head of the queue changed.
    redQueue.execute("red task") {
      log += "red:starting@${taskFaker.nanoTime}"
      taskFaker.sleep(100.µs)
      log += "red:finishing@${taskFaker.nanoTime}"
    }
    assertThat(taskFaker.executeCallCount).isEqualTo(1)

    // Enqueueing the blue task doesn't start a thread because the red one is still starting.

    }

    PlexusContainer container(CliRequest cliRequest) throws Exception {
        if (cliRequest.classWorld == null) {
            cliRequest.classWorld =
                    new ClassWorld("plexus.core", Thread.currentThread().getContextClassLoader());
        }

        ClassRealm coreRealm = cliRequest.classWorld.getClassRealm("plexus.core");
        if (coreRealm == null) {

    assertEquals(-1, reader.read());
    assertEquals(-1, reader.read(new char[10], 0, 10));
    assertEquals(-1, reader.read(CharBuffer.allocate(10)));
    assertEquals(0, reader.skip(10));
  }

  private static String readFully(CharSequenceReader reader) throws IOException {
    StringBuilder builder = new StringBuilder();
    int read;
    while ((read = reader.read()) != -1) {
      builder.append((char) read);

  /**
   * Checks whether {@code method} is thread-safe, as indicated by the presence of the {@link
   * AllowConcurrentEvents} annotation.
   */
  private static boolean isDeclaredThreadSafe(Method method) {
    return method.getAnnotation(AllowConcurrentEvents.class) != null;
  }

  /**
   * Subscriber that synchronizes invocations of a method to ensure that only one thread may enter
   * the method at a time.
   */

   * higher value than you need can waste space and time, and a significantly lower value can lead
   * to thread contention. But overestimates and underestimates within an order of magnitude do not
   * usually have much noticeable impact. A value of one permits only one thread to modify the cache
   * at a time, but since read operations and cache loading computations can proceed concurrently,

## Filter Data - Security

To ensure that you don't return more data than you should, read the docs for [Tutorial - Response Model - Return Type](../tutorial/response-model.md){.internal-link target=_blank}.

## Documentation Tags - OpenAPI

     * any.
     * @return Model
     */
    public Model read(Reader reader) throws IOException, XmlPullParserException {
        return read(reader, true);
    } // -- Model read( Reader )

    protected Model read(InputStream is, boolean strict, InputSource source)
            throws IOException, XmlPullParserException {
        try {
            org.apache.maven.api.model.Model model =

                        }
                        w.checkException();

                        if ( read <= 0 ) {
                            break;
                        }

                        w.write(b[ i ], read, fos);
                    }

                    i = i == 1 ? 0 : 1;
                    off += read;
                }

                if ( log.isDebugEnabled() ) {

        this.transformer = transformer;
    }

    @Override
    public Model read(File input, Map<String, ?> options) throws IOException {
        Objects.requireNonNull(input, "input cannot be null");
        return read(input.toPath(), options);
    }

    @Override
    public Model read(Path path, Map<String, ?> options) throws IOException {
        Objects.requireNonNull(path, "path cannot be null");

   * 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
   * @throws NullPointerException if any of {@code elements} is null
   * @since 7.0 (source-compatible since 2.0)
   */