Java Concurrency - java.util.concurrent

Executor

See Executor

Future (Results and Execution cancelation)

A Future:

• returns the results of a function, allows determination of whether execution has completed,
• and provides a means to cancel execution.

A RunnableFuture is a Future that possesses a run method that upon (during ?) execution, sets its results.

ThreadPool

Object

• ThreadPoolExecutor: An Java Concurrency - Executor (Thread manager) that executes each submitted task using one of possibly several pooled threads
• ScheduledThreadPoolExecutor additionally schedule commands to run after a given delay, or to execute periodically.

Factory

The Executor Service are normally created and configured using Executors factory methods. The Executors class provides:

• factory methods for the most common kinds and configurations of Executors,
• as well as a few utility methods for using them.

Futures

• FutureTask: base implementation of future, with methods to start and cancel a computation, query to see if the computation is complete, and retrieve the result of the computation. A FutureTask can be used to wrap a Callable or Runnable object.

Completion Service

• ExecutorCompletionService uses a supplied executor to execute tasks. This class arranges that submitted tasks are, upon completion, placed on a queue accessible using take. It assists in coordinating the processing of groups of asynchronous tasks.

ForkJoinTask

• ForkJoinPool: Class ForkJoinPool provides an Executor primarily designed for processing instances of ForkJoinTask and its subclasses. These classes employ a work-stealing scheduler that attains high throughput for tasks conforming to restrictions that often hold in computation-intensive parallel processing.