Package org.alfresco.repo.cache

Class MemoryCache<K extends Serializable,​V>

  • All Implemented Interfaces:
    SimpleCache<K,​V>
    public class MemoryCache<K extends Serializable,​V>
extends Object
implements SimpleCache<K,​V>
    A cache backed by a simple ConcurrentHashMap.

    Note: This cache is not transaction-safe. Use it for tests or wrap it appropriately.

    Since:
    3.2
    Author:
    Derek Hulley

    • Constructor Detail

      • MemoryCache

        public MemoryCache()

    • Method Detail

      • contains

        public boolean contains​(K key)
        Specified by:
        contains in interface SimpleCache<K extends Serializable,​V>
        Parameters:
        key - the cache key to check up on
        Returns:
        Returns true if there is a cache entry, regardless of whether the value itself is null

      • get

        public V get​(K key)
        Specified by:
        get in interface SimpleCache<K extends Serializable,​V>
        Parameters:
        key - K
        Returns:
        Returns the value associated with the key. It will be null if the value is null or if the cache doesn't have an entry.

      • put

        public void put​(K key,
                V value)
        Description copied from interface: SimpleCache
        Set the value to store for a given key.

        Be sure to use remove if cache entries need to be removed as the cache implementations must treat a null value as a first class object in exactly the same way as a Map will allow storage and retrieval of null values.

        Specified by:
        put in interface SimpleCache<K extends Serializable,​V>
        Parameters:
        key - the key against which to store the value
        value - the value to store. null is allowed.

      • remove

        public void remove​(K key)
        Description copied from interface: SimpleCache
        Removes the cache entry whether or not the value stored against it is null.
        Specified by:
        remove in interface SimpleCache<K extends Serializable,​V>
        Parameters:
        key - the key value to remove