服务器端执行对云服务的多个请求 [英] Server-side performing multiple requests against cloud services
问题描述
我在写一个web的应用程序，使用多个网络的API的过程。
对于单个用户的一个请求，我的应用程序可能需要执行多达30个HTTP请求到其他站点。该网站的住房在web-app可以有数百个并发用户。
I am in the process of writing a web-app that uses multiple web APIs. For a single request of a single user, my app may need to perform up to 30 HTTP requests to other sites. The site housing the web-app can have hundreds of concurrent users.
我一直在四处寻找，试图找出我应该使用哪个库。我在寻找一个成熟的项目已经详细的文档和测试code，一个仍然会在今后几年里各地。不知道这样的事情存在（！）
I've been looking around trying to figure out which library should I use. I'm looking for a mature project that has detailed documentation and tested code, one that will still be around in years to come. Not sure if something like that exists (!)
问题的夫妇：
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在一个情况下，如上述，我应该使用异步HTTP客户端（不带螺纹）或常规（可能共用）HTTP客户端（带螺纹）？异步性功能可减轻使用线程我的应用程序，但使得code比较分散 - 将请求负担我的服务器上面提到的人数太多？ （它说，这里异步更具可扩展性）
In a case such as described above, should I be using an asynchronous HTTP client (without threading), or a regular (possibly pooled) HTTP client (with threading)? Asynchronicity relieves my app from using threads, but makes the code more scattered - will the above mentioned number of requests burden my server too much? (it says here that asynchronous is more scalable)
哪个库是用常见的一种？它是阿帕奇HttpComponenets HttpClient的或它的非同步couterpart的 HttpAsynchClient - 这是在阿尔法）？如何jfarcand的 AsyncHttpClient
Which library is the common one to use? Is it Apache HttpComponenets HttpClient or its asynch couterpart HttpAsynchClient - which is in Alpha...)? How about jfarcand's AsyncHttpClient?
好吧，让我们说，我将使用线程。
周围挖后，我认识到，一个servlet中产卵从线程（在我的情况 - 一个Struts动作），可能是一个大的否否的：
Okay, let's say I will use threads. After digging around I realize that spawning threads from within a servlet (in my case - a Struts action), may be a big No No :
相关的问题：
<一个href=\"http://stackoverflow.com/questions/3745905/what-is-recommended-way-for-spawning-threads-from-a-servlet-in-tomcat\">What被推荐的方式产卵线程在Tomcat中一个servlet
<一个href=\"http://stackoverflow.com/questions/4424329/need-help-with-java-web-app-design-to-perform-background-tasks\">Need使用Java Web应用程序的设计有助于执行后台任务
我看到它的方式，这是我的选择：
The way I see it, these are my options:
- use我自己的线程池（容器不管理自己的线程）
- use WorkManager使用如CommonJ （似乎是一个无效的产品）
- use第三方调度，如石英（可能是矫枉过正...？）
- use my own thread pool (container doesn't manage my threads)
- use a WorkManager such as CommonJ (seems like an inactive product)
- use a 3rd party scheduler such as Quartz (may be an overkill ... ?)
我想AP preciate为这个特定用例的任何建议 - 汇聚来自不同的Web服务lotsa数据（这种聚合是由单个用户的单个请求调用）
I would appreciate any recommendations for this specific use case - aggregating lotsa data from different web services (this aggregation is invoked by a single user's single request).
推荐答案
好问题。我先试试异步解决方案，看到的一切是如何工作的。异步解决方案是最简单的实现。
Good question. I would try an asynchronous solution first to see how everything works. The asynchronous solution would be the simplest to implement.
如果还是不行，请尝试使用更多的线程模型。
If that doesn't work, try a more threaded model.
我会用HttpClient的，让你的请求。我用它做了很多，并用它为我做任何HTTP的工作。
I would use HttpClient for making your requests. I've worked with it a lot and use it for any http work that I have to do.
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