Code example for ConcurrentLinkedQueue

 * Run queue implementation based on a {@link ConcurrentLinkedQueue}. This is a FIFO queue which may not give good caching performance for some function repositories and portfolios. 
/* package */final class ConcurrentLinkedQueueRunQueue implements RunQueue { 
  private final ConcurrentLinkedQueue<ContextRunnable> _list = new ConcurrentLinkedQueue<ContextRunnable>(); 
  public boolean isEmpty() { 
    return _list.isEmpty(); 
  public int size() { 
    return _list.size(); 
  public Iterator<ContextRunnable> iterator() { 
    return _list.iterator(); 
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