Package alluxio.util.executor

Class UniqueBlockingQueue<T>

  • Type Parameters:
    T - element type
    All Implemented Interfaces:
    java.lang.Iterable<T>, java.util.Collection<T>, java.util.concurrent.BlockingQueue<T>, java.util.Queue<T>
    public class UniqueBlockingQueue<T>
extends java.util.AbstractQueue<T>
implements java.util.concurrent.BlockingQueue<T>
    A blocking queue containing only unique elements, based on LinkedBlockingQueue implementation. We serialize the insertion into the queue, otherwise, we may end up with duplicate elements in the queue.

    • Constructor Summary

      Constructors 
      Constructor Description
      UniqueBlockingQueue​(int capacity)
      Constructor for a UniqueBlockingQueue.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int drainTo​(java.util.Collection<? super T> c)  
      int drainTo​(java.util.Collection<? super T> c, int maxElements)  
      java.util.Iterator<T> iterator()  
      boolean offer​(T e)  
      boolean offer​(T e, long timeout, java.util.concurrent.TimeUnit unit)  
      T peek()  
      T poll()  
      T poll​(long timeout, java.util.concurrent.TimeUnit unit)  
      void put​(T e)  
      int remainingCapacity()  
      int size()  
      T take()  

      • Methods inherited from class java.util.AbstractQueue

        add, addAll, clear, element, remove

      • Methods inherited from class java.util.AbstractCollection

        contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

      • Methods inherited from interface java.util.concurrent.BlockingQueue

        add, contains, remove

      • Methods inherited from interface java.util.Collection

        addAll, clear, containsAll, equals, hashCode, isEmpty, parallelStream, removeAll, removeIf, retainAll, spliterator, stream, toArray, toArray, toArray

      • Methods inherited from interface java.lang.Iterable

        forEach

      • Methods inherited from interface java.util.Queue

        element, remove

    • Constructor Detail

      • UniqueBlockingQueue

        public UniqueBlockingQueue​(int capacity)
        Constructor for a UniqueBlockingQueue.
        Parameters:
        capacity - capacity of the blocking queue

    • Method Detail

      • put

        public void put​(T e)
         throws java.lang.InterruptedException
        Specified by:
        put in interface java.util.concurrent.BlockingQueue<T>
        Throws:
        java.lang.InterruptedException

      • offer

        public boolean offer​(T e)
        Specified by:
        offer in interface java.util.concurrent.BlockingQueue<T>
        Specified by:
        offer in interface java.util.Queue<T>

      • offer

        public boolean offer​(T e,
                     long timeout,
                     java.util.concurrent.TimeUnit unit)
              throws java.lang.InterruptedException
        Specified by:
        offer in interface java.util.concurrent.BlockingQueue<T>
        Throws:
        java.lang.InterruptedException

      • take

        public T take()
       throws java.lang.InterruptedException
        Specified by:
        take in interface java.util.concurrent.BlockingQueue<T>
        Throws:
        java.lang.InterruptedException

      • remainingCapacity

        public int remainingCapacity()
        Specified by:
        remainingCapacity in interface java.util.concurrent.BlockingQueue<T>

      • drainTo

        public int drainTo​(java.util.Collection<? super T> c)
        Specified by:
        drainTo in interface java.util.concurrent.BlockingQueue<T>

      • drainTo

        public int drainTo​(java.util.Collection<? super T> c,
                   int maxElements)
        Specified by:
        drainTo in interface java.util.concurrent.BlockingQueue<T>

      • iterator

        public java.util.Iterator<T> iterator()
        Specified by:
        iterator in interface java.util.Collection<T>
        Specified by:
        iterator in interface java.lang.Iterable<T>
        Specified by:
        iterator in class java.util.AbstractCollection<T>

      • size

        public int size()
        Specified by:
        size in interface java.util.Collection<T>
        Specified by:
        size in class java.util.AbstractCollection<T>

      • poll

        public T poll()
        Specified by:
        poll in interface java.util.Queue<T>

      • poll

        public T poll​(long timeout,
              java.util.concurrent.TimeUnit unit)
       throws java.lang.InterruptedException
        Specified by:
        poll in interface java.util.concurrent.BlockingQueue<T>
        Throws:
        java.lang.InterruptedException

      • peek

        public T peek()
        Specified by:
        peek in interface java.util.Queue<T>