Java Executors：如何设置任务优先级？ [英] Java Executors: how can I set task priority?

问题描述

是否有可能为执行者执行的任务设置优先级？我在JCIP中发现了一些关于它的可能，但我找不到任何例子，我找不到任何相关的文档。

Is there a possibility to set priority to tasks which are executed by Executors? I've found some statements in JCIP about it's possible but I cannot find any example and I cannot find anything related in docs.

从JCIP：

执行策略指定
执行任务
的什么，在哪里，何时以及如何执行，包括：

An execution policy specifies the "what, where, when, and how" of task execution, including:

• ...


• 执行任务的顺序应为FIFO，LIFO， strong>）？


• ...

UPD ：我意识到我不是问我想问什么。我真正想要的是：

UPD: I realized that I asked not exactly what I wanted to ask. What I really wanted is:

如何使用/模拟设置线程优先级（即 thread.setPriority（））与executors框架？

How to use/emulate setting threads priority (i.e. what was thread.setPriority()) with executors framework?

推荐答案

目前只有执行程序界面是 ThreadPoolExecutor 和 ScheduledThreadpoolExecutor

而不是使用实用程序/工厂类 Executors ，您应该使用构造函数创建一个实例。

Instead of using the utility / factory class Executors, you should create an instance using a constructor.

您可以传送

You can pass a BlockingQueue to the constructors of the ThreadPoolExecutor.

BlockingQueue的一个实现，rel =nofollow noreferrer> BlockingQueue 到ThreadPoolExecutor的构造函数。 ：//java.sun.com/javase/6/docs/api/java/util/concurrent/PriorityBlockingQueue.htmlrel =nofollow noreferrer> PriorityBlockingQueue 可让您将Comparator传递到构造函数，即方式让您决定执行的顺序。

One of the implementations of the BlockingQueue, the PriorityBlockingQueue lets you pass a Comparator to a constructor, that way enabling you to decide the order of execution.

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