## Uses of Interface
org.apache.commons.lang3.concurrent.ConcurrentInitializer

- Packages that use ConcurrentInitializer
  Package | Description
  --- | ---
  org.apache.commons.lang3.concurrent | Provides support classes for multi-threaded programming.

- - ### Uses of ConcurrentInitializer in org.apache.commons.lang3.concurrent

    Classes in org.apache.commons.lang3.concurrent that implement ConcurrentInitializer
    Modifier and Type | Class and Description
    --- | ---
    `class` | `AtomicInitializer<T>` A specialized implementation of the `ConcurrentInitializer` interface based on an `AtomicReference` variable.
    `class` | `AtomicSafeInitializer<T>` A specialized `ConcurrentInitializer` implementation which is similar to `AtomicInitializer`, but ensures that the `AtomicSafeInitializer.initialize()` method is called only once.
    `class` | `BackgroundInitializer<T>` A class that allows complex initialization operations in a background task.
    `class` | `CallableBackgroundInitializer<T>` A specialized `BackgroundInitializer` implementation that wraps a `Callable` object.
    `class` | `ConstantInitializer<T>` A very simple implementation of the `ConcurrentInitializer` interface which always returns the same object.
    `class` | `LazyInitializer<T>` This class provides a generic implementation of the lazy initialization pattern.
    `class` | `MultiBackgroundInitializer` A specialized `BackgroundInitializer` implementation that can deal with multiple background initialization tasks.

    Methods in org.apache.commons.lang3.concurrent with parameters of type ConcurrentInitializer
    Modifier and Type | Method and Description
    --- | ---
    `static <K,V> V` | ConcurrentUtils.`createIfAbsent(ConcurrentMap<K,V> map, K key, ConcurrentInitializer<V> init)` Checks if a concurrent map contains a key and creates a corresponding value if not.
    `static <K,V> V` | ConcurrentUtils.`createIfAbsentUnchecked(ConcurrentMap<K,V> map, K key, ConcurrentInitializer<V> init)` Checks if a concurrent map contains a key and creates a corresponding value if not, suppressing checked exceptions.
    `static <T> T` | ConcurrentUtils.`initialize(ConcurrentInitializer<T> initializer)` Invokes the specified `ConcurrentInitializer` and returns the object produced by the initializer.
    `static <T> T` | ConcurrentUtils.`initializeUnchecked(ConcurrentInitializer<T> initializer)` Invokes the specified `ConcurrentInitializer` and transforms occurring exceptions to runtime exceptions.

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