task

java并发库之Executors常用的创建ExecutorService的几个方法说明

由 孤人 提交于 2020-02-29 20:00:36
一、线程池的创建 我们可以通过ThreadPoolExecutor来创建一个线程池。 new ThreadPoolExecutor(corePoolSize, maximumPoolSize, keepAliveTime, milliseconds,runnableTaskQueue, handler); 创建一个线程池需要输入几个参数： corePoolSize（线程池的基本大小）：当提交一个任务到线程池时，线程池会创建一个线程来执行任务，即使其他空闲的基本线程能够执行新任务也会创建线程，等到需要执行的任务数大于线程池基本大小时就不再创建。如果调用了线程池的prestartAllCoreThreads方法，线程池会提前创建并启动所有基本线程。 runnableTaskQueue（任务队列）：用于保存等待执行的任务的阻塞队列。 可以选择以下几个阻塞队列。 ArrayBlockingQueue：是一个基于数组结构的有界阻塞队列，此队列按 FIFO（先进先出）原则对元素进行排序。 LinkedBlockingQueue：一个基于链表结构的阻塞队列，此队列按FIFO （先进先出） 排序元素，吞吐量通常要高于ArrayBlockingQueue。静态工厂方法Executors.newFixedThreadPool()使用了这个队列。 SynchronousQueue

Create tasks in Visual Studio Code per user

由 感情迁移 提交于 2020-02-24 05:28:09
问题 When I created a Node task for Visual Studio Code it created a tasks.json file inside the .settings folder for the folder that you have open (node-app in this case as shown in the image below). ie: it creates a task per folder. { "version": "0.1.0", "command": "node", "isShellCommand": true, "args": ["${file}"] } My question is how do you create a task per user rather than a project based task so that I can execute the node code from any folder rather that having to create the same task for

Create tasks in Visual Studio Code per user

由 隐身守侯 提交于 2020-02-24 05:27:07
问题 When I created a Node task for Visual Studio Code it created a tasks.json file inside the .settings folder for the folder that you have open (node-app in this case as shown in the image below). ie: it creates a task per folder. { "version": "0.1.0", "command": "node", "isShellCommand": true, "args": ["${file}"] } My question is how do you create a task per user rather than a project based task so that I can execute the node code from any folder rather that having to create the same task for

Continuous polling using Tasks

由 冷暖自知 提交于 2020-02-21 13:35:50
问题 This is something I've always used Threads / BackgroundWorker for, but am trying to migrate over to Task way of doing things. Let's say I have a 3rd party SDK I use to read bytes from a USB port. That read call is blocking and times out after 100 ms if no bytes are read, returning null. It returns immediately if bytes are read, returning byte[] array of read bytes. So I basically need to keep polling over and over, and take action on received bytes, by calling Parsing function. It's a WPF

async and await are single threaded Really?

由 好久不见. 提交于 2020-02-17 14:04:49
问题 I created following code: using System; using System.Threading.Tasks; namespace ConsoleApplication2 { class Program { static void Main() { Console.WriteLine("M Start"); MyMethodAsync(); Console.WriteLine("M end"); Console.Read(); } static async Task MyMethodAsync() { await Task.Yield(); Task<int> longRunningTask = LongRunningOperationAsync(); Console.WriteLine("M3"); //and now we call await on the task int result = await longRunningTask; //use the result Console.WriteLine(result); } static

Windows Azure Website with a Startup task using Webmatrix 3 or similar (without using Visual Studio)

由 匆匆过客 提交于 2020-02-15 09:02:02
问题 I know that Azure Websites are made to be easy, not have role configs and such...but I was still wondering, is there ANY way to create a Startup Task when using a Website? I'm asking because I would like to ease the deployment of an existing website through FTP and Webmatrix (not recompiling the source and without using Visual Studio), and then use Startup Task to deploy and install additionnal components (Crystal Reports, ActiveX Dll...) Thanks for answers Mokh PS : my question is an copy

Windows Azure Website with a Startup task using Webmatrix 3 or similar (without using Visual Studio)

由 我只是一个虾纸丫 提交于 2020-02-15 08:59:39
问题 I know that Azure Websites are made to be easy, not have role configs and such...but I was still wondering, is there ANY way to create a Startup Task when using a Website? I'm asking because I would like to ease the deployment of an existing website through FTP and Webmatrix (not recompiling the source and without using Visual Studio), and then use Startup Task to deploy and install additionnal components (Crystal Reports, ActiveX Dll...) Thanks for answers Mokh PS : my question is an copy

Windows Azure Website with a Startup task using Webmatrix 3 or similar (without using Visual Studio)

由 纵饮孤独 提交于 2020-02-15 08:58:37
问题 I know that Azure Websites are made to be easy, not have role configs and such...but I was still wondering, is there ANY way to create a Startup Task when using a Website? I'm asking because I would like to ease the deployment of an existing website through FTP and Webmatrix (not recompiling the source and without using Visual Studio), and then use Startup Task to deploy and install additionnal components (Crystal Reports, ActiveX Dll...) Thanks for answers Mokh PS : my question is an copy

Windows Azure Website with a Startup task using Webmatrix 3 or similar (without using Visual Studio)

由 让人想犯罪 __ 提交于 2020-02-15 08:58:06
问题 I know that Azure Websites are made to be easy, not have role configs and such...but I was still wondering, is there ANY way to create a Startup Task when using a Website? I'm asking because I would like to ease the deployment of an existing website through FTP and Webmatrix (not recompiling the source and without using Visual Studio), and then use Startup Task to deploy and install additionnal components (Crystal Reports, ActiveX Dll...) Thanks for answers Mokh PS : my question is an copy

Is there a proper way to cancel an asynchronous task?

由 拟墨画扇 提交于 2020-02-06 04:27:49
问题 I encountered a problem how to properly cancel an asynchronous task. Here is some draft. My entry point runs two asynchronous task. The first task does some 'long' work and the second one cancels it. Entry point: private static void Main() { var ctc = new CancellationTokenSource(); var cancellable = ExecuteLongCancellableMethod(ctc.Token); var cancelationTask = Task.Run(() => { Thread.Sleep(2000); Console.WriteLine("[Before cancellation]"); ctc.Cancel(); }); try { Task.WaitAll(cancellable,
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