Method Detail

• public void cleanUpNullReferences()

  Invoked when some of the held SoftReferences have been evicted by the garbage collector and so should be removed from the cache. The implementation must ensure that concurrent invocations of all methods on the cache may occur from other threads and thus should protect any shared resources.

• public V get(K key)

  Gets a value from the cache

  Parameters:

  key - the key whose associated value is to be returned

  Returns:

  the value, or null, if it does not exist.

• public V getAndPut(K key, ValueProvider<? super K, ? extends V> valueProvider)

  Try to get the value from cache. If not found, create the value by ValueProvider and put it into the cache, at last return the value.

  Parameters:

  key

  valueProvider - provide the value if the associated value not found

  Returns:

  the cached value

• public V put(K key, V value)

  Associates the specified value with the specified key in the cache.

  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.