io.netty5.util.concurrent (Netty API Reference (5.0.0.Alpha4))

Utility classes for concurrent / async tasks.

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.
FutureCompletionStage<V>	A `CompletionStage` that provides the same threading semantics and guarantees as the underlying `Future`, which means that all the callbacks will be executed by `FutureCompletionStage.executor()` if not specified otherwise (by calling the corresponding *Async methods).
FutureContextListener<C,V>	Listens to the result of a `Future`.
FutureListener<V>	Listens to the result of a `Future`.
FuturePromiseFactory	Provides a way to create `Future` and `Promise` instances.
OrderedEventExecutor	Marker interface for `EventExecutor`s that will process all submitted tasks in an ordered / serial fashion.
Promise<V>	Special `Future` which is writable.
RejectedExecutionHandler	Similar to `RejectedExecutionHandler` but specific to `SingleThreadEventExecutor`.
RunnableFuture<V>	A combination of `RunnableFuture` and `Future`.
RunnableScheduledFuture<V>	A combination of `RunnableFuture` and `Comparable` (sorting by their next deadline), with additional methods for scheduling, periodicity, and delay.
ThreadProperties	Expose details for a `Thread`.

Class Summary
Class	Description
AbstractEventExecutor	Abstract base class for `EventExecutor` implementations.
AbstractScheduledEventExecutor	Abstract base class for `EventExecutor`s that want to support scheduling.
DefaultEventExecutorGroup	Default implementation of `MultithreadEventExecutorGroup` which will use `SingleThreadEventExecutor` instances to handle the tasks.
DefaultPromise<V>
DefaultThreadFactory	A `ThreadFactory` implementation with a simple naming rule.
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	`EventExecutorGroup` implementation that handles their tasks with multiple threads at the same time.
NonStickyEventExecutorGroup	`EventExecutorGroup` which will preserve `Runnable` execution order but makes no guarantees about what `EventExecutor` (and therefore `Thread`) will be used to execute the `Runnable`s.
PromiseCombiner	A promise combiner monitors the outcome of a number of discrete futures, then notifies a final, aggregate promise when all of the combined futures are finished.
RejectedExecutionHandlers	Expose helper methods which create different `RejectedExecutionHandler`s.
SingleThreadEventExecutor	`OrderedEventExecutor`'s implementation that execute all its submitted tasks in a single thread.
ThreadPerTaskExecutor
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.