我是否必须在Web API REST方法中添加显式线程? [英] Must I add explicit threading to my Web API REST methods?

问题描述

我已经创建了一些Web API REST方法，这些方法将由手持设备/Windows CE客户端调用.因此，服务器可能同时受到多个请求的攻击(嗯，会更像是它，问题是多少).

I have created some Web API REST methods that will be called by handheld/Windows CE clients. So the server may be hit by multiple (well, will be is more like it, the question being how many) requests simultaneously.

REST方法会自动解决此问题，还是我必须显式添加线程代码，以便一个客户端的请求不会干扰另一个客户端的请求?

Do the REST methods automatically take care of this, or do I have to explicitly add threading code so that one client's request does not interfere with anothers?

推荐答案

不需要-asp.net框架已经汇集了多个线程，可以同时处理多个请求.

No need - the asp.net framework already pools a number of threads for handling a number of requests concurrently.

传入请求入队，池线程轮流将请求出队并处理.

Incoming requests are enqueued, and pooled threads take their turn at dequeuing requests and handling them.

您可以在此处找到有关asp.net如何处理此问题的更多信息: http://www.codeproject.com/Articles/38501/Multi-Threading-in-ASP-NET

You can find more about how asp.net handles this here: http://www.codeproject.com/Articles/38501/Multi-Threading-in-ASP-NET

修改

但是，您应该将CPU/IO密集型工作负荷推迟到其他线程(最好使用TPL)，以便由asp.net管理的线程保持响应状态.

You should, however, defer CPU/IO-intensive workloads to other threads (preferably using TPL), so that the threads managed by asp.net remain responsive.

警告:如果在处理请求时确实产生了新线程，请确保在从"REST方法"返回之前，它们均已完成.您可能会想:我将尽快回到用户手中，并在后台保留一个线程，将东西保存到数据库中."这很危险，主要是因为应用程序池可能被回收，从而中止了后台线程.在此处阅读更多信息:

Warning: if you do spawn new threads while handling a request, make sure they have all finished before returning from the "REST method". You may think "I'm gonna return to the user asap, and leave a thread in the background saving stuff to the database." This is dangerous, mainly because the Application Pool may be recycled, aborting your background threads. Read more here: http://haacked.com/archive/2011/10/16/the-dangers-of-implementing-recurring-background-tasks-in-asp-net.aspx

在所有线程完成之前不要返回.

Do not return until all threads have finished.

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