org.codehaus.groovy.runtime.memoize

## Class ConcurrentSoftCache<K,V>

- java.lang.Object
- - org.codehaus.groovy.runtime.memoize.ConcurrentCommonCache<K,SoftReference<V>>
  - - org.codehaus.groovy.runtime.memoize.ConcurrentSoftCache<K,V>

- Type Parameters:
    `K` - key type
    `V` - real value type
  All Implemented Interfaces:
    Serializable, Map<K,SoftReference<V>>, EvictableCache<K,SoftReference<V>>, MemoizeCache<K,SoftReference<V>>, ValueConvertable<SoftReference<V>,Object>

      public class ConcurrentSoftCache<K,V>
      extends ConcurrentCommonCache<K,SoftReference<V>>

  Represents concurrent cache holding SoftReference instance as value
  See Also:
    Serialized Form

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class org.codehaus.groovy.runtime.memoize.ConcurrentCommonCache

      `ConcurrentCommonCache.Action<K,V,R>`

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

      `EvictableCache.EvictionStrategy`

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

      `MemoizeCache.ValueProvider<K,V>`

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

      `Map.Entry<K,V>`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ConcurrentSoftCache()` Constructs a cache with unlimited size
    `ConcurrentSoftCache(int maxSize)` Constructs a LRU cache with the default initial capacity(16)
    `ConcurrentSoftCache(int initialCapacity, int maxSize)` Constructs a LRU cache with the specified initial capacity and max size.
    `ConcurrentSoftCache(int initialCapacity, int maxSize, EvictableCache.EvictionStrategy evictionStrategy)` Constructs a cache with limited size
    `ConcurrentSoftCache(Map<K,SoftReference<V>> map)` Constructs a cache backed by the specified `Map` instance

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `Object` | `convertValue(SoftReference<V> value)` convert the original value to the target value

    - ### Methods inherited from class org.codehaus.groovy.runtime.memoize.ConcurrentCommonCache

      `cleanUpNullReferences, clear, clearAll, containsKey, containsValue, entrySet, get, getAndPut, getAndPut, isEmpty, keys, keySet, put, putAll, remove, size, values`

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

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

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

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

- - ### Constructor Detail

    - #### ConcurrentSoftCache

          public ConcurrentSoftCache()

      Constructs a cache with unlimited size

    - #### ConcurrentSoftCache

          public ConcurrentSoftCache(int initialCapacity,
                                     int maxSize,
                                     EvictableCache.EvictionStrategy evictionStrategy)

      Constructs a cache with limited size
      Parameters:
        `initialCapacity` - initial capacity of the cache
        `maxSize` - max size of the cache
        `evictionStrategy` - LRU or FIFO, see `EvictableCache.EvictionStrategy`

    - #### ConcurrentSoftCache

          public ConcurrentSoftCache(int initialCapacity,
                                     int maxSize)

      Constructs a LRU cache with the specified initial capacity and max size. The LRU cache is slower than `LRUCache`
      Parameters:
        `initialCapacity` - initial capacity of the LRU cache
        `maxSize` - max size of the LRU cache

    - #### ConcurrentSoftCache

          public ConcurrentSoftCache(int maxSize)

      Constructs a LRU cache with the default initial capacity(16)
      Parameters:
        `maxSize` - max size of the LRU cache
      See Also:
        `ConcurrentSoftCache(int, int)`

    - #### ConcurrentSoftCache

          public ConcurrentSoftCache(Map<K,SoftReference<V>> map)

      Constructs a cache backed by the specified `Map` instance
      Parameters:
        `map` - the `Map` instance

  - ### Method Detail

    - #### convertValue

          public Object convertValue(SoftReference<V> value)

      convert the original value to the target value
      Specified by:
        `convertValue` in interface `ValueConvertable<SoftReference<V>,Object>`
      Overrides:
        `convertValue` in class `ConcurrentCommonCache<K,SoftReference<V>>`
      Parameters:
        `value` - the original value
      Returns:
        the converted value