Package org.codehaus.groovy.runtime.memoize

## Class UnlimitedConcurrentCache<K,​V>

- java.lang.Object
- - org.codehaus.groovy.runtime.memoize.UnlimitedConcurrentCache<K,​V>

- All Implemented Interfaces:
    `Serializable`, `Map<K,​V>`, `EvictableCache<K,​V>`, `MemoizeCache<K,​V>`

      @ThreadSafe
      public final class UnlimitedConcurrentCache<K,​V>
      extends Object
      implements EvictableCache<K,​V>, Serializable

  A cache backed by a ConcurrentHashMap
  See Also:
    Serialized Form

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from interface org.codehaus.groovy.runtime.memoize.EvictableCache

      `EvictableCache.Action<K,​V,​R>, EvictableCache.EvictionStrategy`

    - ### Nested classes/interfaces inherited from interface java.util.Map

      `Map.Entry<K extends Object,​V extends Object>`

    - ### Nested classes/interfaces inherited from interface org.codehaus.groovy.runtime.memoize.MemoizeCache

      `MemoizeCache.ValueProvider<K,​V>`

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `UnlimitedConcurrentCache()` | Constructs a cache with unlimited size
    `UnlimitedConcurrentCache​(int initialCapacity)` | Constructs a cache with unlimited size and set its initial capacity
    `UnlimitedConcurrentCache​(Map<? extends K,​? extends V> m)` | Constructs a cache and initialize the cache with the specified map

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `cleanUpNullReferences()` | Replying on the ConcurrentHashMap thread-safe iteration implementation the method will remove all entries holding SoftReferences to gc-evicted objects.
    `Map<K,​V>` | `clearAll()` | Clear the cache
    `boolean` | `containsKey​(Object key)` | Determines if the cache contains an entry for the specified key.
    `boolean` | `containsValue​(Object value)` |
    `Set<Map.Entry<K,​V>>` | `entrySet()` |
    `V` | `get​(Object key)` | Gets a value from the cache
    `V` | `getAndPut​(K key, MemoizeCache.ValueProvider<? super K,​? extends V> valueProvider)` | Try to get the value from cache.
    `boolean` | `isEmpty()` |
    `Set<K>` | `keys()` | Get all keys associated to cached values
    `Set<K>` | `keySet()` |
    `V` | `put​(K key, V value)` | Associates the specified value with the specified key in the cache.
    `void` | `putAll​(Map<? extends K,​? extends V> m)` |
    `V` | `remove​(Object key)` | Remove the cached value by the key
    `int` | `size()` | Get the size of the cache
    `Collection<V>` | `values()` | Get all cached values

    - ### Methods inherited from class java.lang.Object

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

    - ### Methods inherited from interface org.codehaus.groovy.runtime.memoize.EvictableCache

      `clear`

    - ### Methods inherited from interface java.util.Map

      `compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll`

- - ### Constructor Detail

    - #### UnlimitedConcurrentCache

          public UnlimitedConcurrentCache()

      Constructs a cache with unlimited size

    - #### UnlimitedConcurrentCache

          public UnlimitedConcurrentCache​(int initialCapacity)

      Constructs a cache with unlimited size and set its initial capacity
      Parameters:
        `initialCapacity` - the initial capacity

    - #### UnlimitedConcurrentCache

          public UnlimitedConcurrentCache​(Map<? extends K,​? extends V> m)

      Constructs a cache and initialize the cache with the specified map
      Parameters:
        `m` - the map to initialize the cache

  - ### Method Detail

    - #### remove

          public V remove​(Object key)

      Remove the cached value by the key
      Specified by:
        `remove` in interface `EvictableCache<K,​V>`
      Specified by:
        `remove` in interface `Map<K,​V>`
      Parameters:
        `key` -
      Returns:
        returns the removed value

    - #### putAll

          public void putAll​(Map<? extends K,​? extends V> m)

      Specified by:
        `putAll` in interface `Map<K,​V>`

    - #### keySet

          public Set<K> keySet()

      Specified by:
        `keySet` in interface `Map<K,​V>`

    - #### clearAll

          public Map<K,​V> clearAll()

      Clear the cache
      Specified by:
        `clearAll` in interface `EvictableCache<K,​V>`
      Returns:
        returns the content of the cleared map

    - #### values

          public Collection<V> values()

      Get all cached values
      Specified by:
        `values` in interface `EvictableCache<K,​V>`
      Specified by:
        `values` in interface `Map<K,​V>`
      Returns:
        all cached values

    - #### entrySet

          public Set<Map.Entry<K,​V>> entrySet()

      Specified by:
        `entrySet` in interface `Map<K,​V>`

    - #### keys

          public Set<K> keys()

      Get all keys associated to cached values
      Specified by:
        `keys` in interface `EvictableCache<K,​V>`
      Returns:
        all keys

    - #### containsKey

          public boolean containsKey​(Object key)

      Determines if the cache contains an entry for the specified key.
      Specified by:
        `containsKey` in interface `EvictableCache<K,​V>`
      Specified by:
        `containsKey` in interface `Map<K,​V>`
      Parameters:
        `key` - key whose presence in this cache is to be tested.
      Returns:
        true if the cache contains a mapping for the specified key

    - #### containsValue

          public boolean containsValue​(Object value)

      Specified by:
        `containsValue` in interface `Map<K,​V>`

    - #### size

          public int size()

      Get the size of the cache
      Specified by:
        `size` in interface `EvictableCache<K,​V>`
      Specified by:
        `size` in interface `Map<K,​V>`
      Returns:
        the size of the cache

    - #### isEmpty

          public boolean isEmpty()

      Specified by:
        `isEmpty` in interface `Map<K,​V>`

    - #### put

          public V put​(K key,
                       V value)

      Associates the specified value with the specified key in the cache.
      Specified by:
        `put` in interface `Map<K,​V>`
      Specified by:
        `put` in interface `MemoizeCache<K,​V>`
      Parameters:
        `key` - key with which the specified value is to be associated
        `value` - value to be associated with the specified key
      Returns:
        null, or the old value if the key associated with the specified key.

    - #### get

          public V get​(Object key)

      Gets a value from the cache
      Specified by:
        `get` in interface `Map<K,​V>`
      Specified by:
        `get` in interface `MemoizeCache<K,​V>`
      Parameters:
        `key` - the key whose associated value is to be returned
      Returns:
        the value, or null, if it does not exist.

    - #### getAndPut

          public V getAndPut​(K key,
                             MemoizeCache.ValueProvider<? super K,​? extends V> valueProvider)

      Try to get the value from cache. If not found, create the value by `MemoizeCache.ValueProvider` and put it into the cache, at last return the value.
      Specified by:
        `getAndPut` in interface `MemoizeCache<K,​V>`
      Parameters:
        `key` -
        `valueProvider` - provide the value if the associated value not found
      Returns:
        the cached value

    - #### cleanUpNullReferences

          public void cleanUpNullReferences()

      Replying on the ConcurrentHashMap thread-safe iteration implementation the method will remove all entries holding SoftReferences to gc-evicted objects.
      Specified by:
        `cleanUpNullReferences` in interface `MemoizeCache<K,​V>`