/**
   * Constructs a new finalizable weak reference.
   *
   * @param referent to weakly reference
   * @param queue that should finalize the referent
   */
  protected FinalizableWeakReference(@CheckForNull T referent, FinalizableReferenceQueue queue) {
    super(referent, queue.queue);
    queue.cleanUp();
  }

 */
public final class Crawler {
  private final OkHttpClient client;
  private final Set<HttpUrl> fetchedUrls = Collections.synchronizedSet(new LinkedHashSet<>());
  private final LinkedBlockingQueue<HttpUrl> queue = new LinkedBlockingQueue<>();
  private final ConcurrentHashMap<String, AtomicInteger> hostnames = new ConcurrentHashMap<>();

  public Crawler(OkHttpClient client) {
    this.client = client;
  }

	list.totalEvents.Add(1)
}

func (list *TargetList) sendAsync(event Event, targetIDset TargetIDSet) {
	select {
	case list.queue <- asyncEvent{
		ev:        event,
		targetSet: targetIDset.Clone(),
	}:
	case <-list.ctx.Done():
		list.eventsSkipped.Add(int64(len(list.queue)))
		return
	default:
		list.eventsSkipped.Add(1)

}

// ErrDuplicateQueueConfiguration - duplicate queue configuration error.
type ErrDuplicateQueueConfiguration struct {
	Queue Queue
}

func (err ErrDuplicateQueueConfiguration) Error() string {
	var message string
	if data, xerr := xml.Marshal(err.Queue); xerr != nil {
		message = fmt.Sprintf("%+v", err.Queue)
	} else {
		message = string(data)
	}

        block = new StringBuilder();
        nextBlkStart = 0;
        queue = new PriorityQueue<>(100, new MyTokensComparator());
        this.synonyms = new ArrayList<>();
    }

    @Override
    public boolean incrementToken() throws IOException {
        while (true) {
            final MyToken nextToken = getNextUniqueToken(queue, prevToken);
            if (nextToken == null) {
                getNextBlock();

      implements PeekingIterator<T> {
    private final Queue<T> queue;

    BreadthFirstIterator(T root) {
      this.queue = new ArrayDeque<>();
      queue.add(root);
    }

    @Override
    public boolean hasNext() {
      return !queue.isEmpty();
    }

    @Override
    public T peek() {
      return queue.element();
    }

    @Override
    public T next() {

	r.bufferPool.New = func() interface{} {
		return make([]byte, jsonSplitSize+1024)
	}

	// Create queue
	r.queue = make(chan *queueItem, runtime.GOMAXPROCS(0))
	r.input = make(chan *queueItem, runtime.GOMAXPROCS(0))
	r.readerWg.Add(1)

	// Start splitter
	go func() {
		defer close(r.input)
		defer close(r.queue)
		defer r.readerWg.Done()
		for {
			next, err := r.nextSplit(jsonSplitSize, r.bufferPool.Get().([]byte))

import java.util.List;
import java.util.Queue;

/**
 * Create queue of strings for tests.
 *
 * @author Jared Levy
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public abstract class TestStringQueueGenerator implements TestQueueGenerator<String> {
  @Override
  public SampleElements<String> samples() {
    return new Strings();
  }

  @Override
  public Queue<String> create(Object... elements) {

import java.util.Queue;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Creates queues, containing sample elements, to be tested.
 *
 * @author Jared Levy
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
public interface TestQueueGenerator<E extends @Nullable Object> extends TestCollectionGenerator<E> {
  @Override
  Queue<E> create(Object... elements);

import static java.util.Arrays.asList;

import java.lang.reflect.Method;
import java.util.Collection;
import java.util.List;
import java.util.Queue;
import junit.framework.Test;

/**
 * Tests the {@link Queue} implementations of {@link java.util}, suppressing tests that trip known
 * OpenJDK 6 bugs.
 *
 * @author Kevin Bourrillion
 */