io.netty.util.concurrent (Netty API Reference (4.0.56.Final))

Interface Summary
Interface	Description
EventExecutor	The `EventExecutor` is a special `EventExecutorGroup` which comes with some handy methods to see if a `Thread` is executed in a event loop.
EventExecutorGroup	The `EventExecutorGroup` is responsible for providing the `EventExecutor`'s to use via its `EventExecutorGroup.next()` method.
Future<V>	The result of an asynchronous operation.
FutureListener<V>	A subtype of `GenericFutureListener` that hides type parameter for convenience.
GenericFutureListener<F extends Future<?>>	Listens to the result of a `Future`.
GenericProgressiveFutureListener<F extends ProgressiveFuture<?>>
OrderedEventExecutor	Marker interface for `EventExecutor`s that will process all submitted tasks in an ordered / serial fashion.
ProgressiveFuture<V>	A `Future` which is used to indicate the progress of an operation.
ProgressivePromise<V>	Special `ProgressiveFuture` which is writable.
Promise<V>	Special `Future` which is writable.
RejectedExecutionHandler	Similar to `RejectedExecutionHandler` but specific to `SingleThreadEventExecutor`.
ScheduledFuture<V>	The result of an scheduled asynchronous operation.
ThreadProperties	Expose details for a `Thread`.

Class Summary
Class	Description
AbstractEventExecutor	Abstract base class for `EventExecutor` implementations.
AbstractEventExecutorGroup	Abstract base class for `EventExecutorGroup` implementations.
AbstractFuture<V>	Abstract `Future` implementation which does not allow for cancellation.
AbstractScheduledEventExecutor	Abstract base class for `EventExecutor`s that want to support scheduling.
CompleteFuture<V>	A skeletal `Future` implementation which represents a `Future` which has been completed already.
DefaultEventExecutorGroup	Default implementation of `MultithreadEventExecutorGroup` which will use `DefaultEventExecutor` instances to handle the tasks.
DefaultProgressivePromise<V>
DefaultPromise<V>
DefaultThreadFactory	A `ThreadFactory` implementation with a simple naming rule.
FailedFuture<V>	The `CompleteFuture` which is failed already.
FastThreadLocal<V>	A special variant of `ThreadLocal` that yields higher access performance when accessed from a `FastThreadLocalThread`.
FastThreadLocalThread	A special `Thread` that provides fast access to `FastThreadLocal` variables.
GlobalEventExecutor	Single-thread singleton `EventExecutor`.
ImmediateEventExecutor	Executes `Runnable` objects in the caller's thread.
ImmediateExecutor	`Executor` which execute tasks in the callers thread.
MultithreadEventExecutorGroup	Abstract base class for `EventExecutorGroup` implementations that handles their tasks with multiple threads at the same time.
PromiseAggregator<V,F extends Future<V>>	Deprecated Use `PromiseCombiner` `GenericFutureListener` implementation which consolidates multiple `Future`s into one, by listening to individual `Future`s and producing an aggregated result (success/failure) when all `Future`s have completed.
PromiseCombiner
PromiseNotifier<V,F extends Future<V>>	`GenericFutureListener` implementation which takes other `Promise`s and notifies them on completion.
RejectedExecutionHandlers	Expose helper methods which create different `RejectedExecutionHandler`s.
SingleThreadEventExecutor	Abstract base class for `OrderedEventExecutor`'s that execute all its submitted tasks in a single thread.
SucceededFuture<V>	The `CompleteFuture` which is succeeded already.
UnaryPromiseNotifier<T>
UnorderedThreadPoolEventExecutor	`EventExecutor` implementation which makes no guarantees about the ordering of task execution that are submitted because there may be multiple threads executing these tasks.

Exception Summary
Exception	Description
BlockingOperationException	An `IllegalStateException` which is raised when a user performed a blocking operation when the user is in an event loop thread.

Package io.netty.util.concurrent Description

Utility classes for concurrent / async tasks.