Class ConcurrentOpenHashSet<V>

  • Type Parameters:
    V -

    public class ConcurrentOpenHashSet<V>
    extends java.lang.Object
    Concurrent hash set.

    Provides similar methods as a ConcurrentMap<K,V> but since it's an open hash map with linear probing, no node allocations are required to store the values
    WARN: method forEach do not guarantee thread safety, nor does the values method.
    The forEach method is specifically designed for single-threaded usage. When iterating over a set with concurrent writes, it becomes possible for new values to be either observed or not observed. There is no guarantee that if we write value1 and value2, and are able to see value2, then we will also see value1.
    It is crucial to understand that the results obtained from aggregate status methods such as values are typically reliable only when the map is not undergoing concurrent updates from other threads. When concurrent updates are involved, the results of these methods reflect transient states that may be suitable for monitoring or estimation purposes, but not for program control.

    • Constructor Detail

      • ConcurrentOpenHashSet

        public ConcurrentOpenHashSet()
      • ConcurrentOpenHashSet

        public ConcurrentOpenHashSet​(int expectedItems)
      • ConcurrentOpenHashSet

        public ConcurrentOpenHashSet​(int expectedItems,
                                     int concurrencyLevel)
      • ConcurrentOpenHashSet

        public ConcurrentOpenHashSet​(int expectedItems,
                                     int concurrencyLevel,
                                     float mapFillFactor,
                                     float mapIdleFactor,
                                     boolean autoShrink,
                                     float expandFactor,
                                     float shrinkFactor)
    • Method Detail

      • size

        public long size()
      • capacity

        public long capacity()
      • getUsedBucketCount

        long getUsedBucketCount()
      • isEmpty

        public boolean isEmpty()
      • contains

        public boolean contains​(V value)
      • add

        public boolean add​(V value)
      • remove

        public boolean remove​(V value)
      • clear

        public void clear()
      • forEach

        public void forEach​(java.util.function.Consumer<? super V> processor)
        Iterate over all the elements in the set and apply the provided function.

        Warning: Do Not Guarantee Thread-Safety.

        processor - the function to apply to each element
      • values

        java.util.List<V> values()
        a new list of all values (makes a copy)
      • hash

        static final <K> long hash​(K key)
      • signSafeMod

        static final int signSafeMod​(long n,
                                     int max)