本文介绍了如何在Heroku上多线程Jetty RESTful服务?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我开始使用Heroku网站上的JAX-RS教程 - >





主要方法如下所示:

  package com.example; 

导入org.eclipse.jetty.server.Server;
import org.eclipse.jetty.webapp.WebAppContext;

/ **
*
*该类在嵌入式Jetty容器中启动Web应用程序。
*这是您的应用程序的入口点。用于
*启动的Java命令应该激发这个主要方法。
*
* /
public class Main {b
$ b / **
* @param args
* /
public static void main(String [] args)抛出Exception {
String webappDirLocation =src / main / webapp /;

//我们应该运行的端口可以设置为环境变量
//查找该变量,如果不存在,则默认为8080。
String webPort = System.getenv(PORT);
if(webPort == null || webPort.isEmpty()){
webPort =8080;
}

服务器服务器=新服务器(Integer.valueOf(webPort));
WebAppContext root = new WebAppContext();

root.setContextPath(/);
root.setDescriptor(webappDirLocation +/WEB-INF/web.xml);
root.setResourceBase(webappDirLocation);

//父装载器优先级是Jetty接受的类装入器设置。
//默认情况下,Jetty的行为与大多数Web容器相同,因为它将
//允许您的应用程序替换属于
//容器一部分的非服务器库。将父装载程序优先级设置为true可更改此行为。
//在这里阅读更多:http://wiki.eclipse.org/Jetty/Reference/Jetty_Classloading
root.setParentLoaderPriority(true);

server.setHandler(root);

server.start();
server.join();
}

}

我想知道有没有人可以解释我和服务器和root有什么关系?如果我给这个进程分配了一个dyno,它是否会自动在一个线程池中创建多个请求线程来处理这个RESTful请求?如果是这样,哪些部分共享/不共享?



谢谢!

解决方案

Jetty仅使用该场景中的默认值(Jetty的默认值,而不是Heroku的)。你可以像这样改变它:




I was getting started with the JAX-RS tutorial on Heroku's site->

http://arcane-chamber-8582.herokuapp.com/

The main method looks like this:

package com.example;

import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.webapp.WebAppContext;

/**
 *
 * This class launches the web application in an embedded Jetty container.
 * This is the entry point to your application. The Java command that is used for
 * launching should fire this main method.
 *
 */
public class Main {

    /**
     * @param args
     */
    public static void main(String[] args) throws Exception{
        String webappDirLocation = "src/main/webapp/";

        // The port that we should run on can be set into an environment variable
        // Look for that variable and default to 8080 if it isn't there.
        String webPort = System.getenv("PORT");
        if (webPort == null || webPort.isEmpty()) {
            webPort = "8080";
        }

        Server server = new Server(Integer.valueOf(webPort));
        WebAppContext root = new WebAppContext();

        root.setContextPath("/");
        root.setDescriptor(webappDirLocation + "/WEB-INF/web.xml");
        root.setResourceBase(webappDirLocation);

        // Parent loader priority is a class loader setting that Jetty accepts.
        // By default Jetty will behave like most web containers in that it will
        // allow your application to replace non-server libraries that are part of the
        // container. Setting parent loader priority to true changes this behavior.
        // Read more here: http://wiki.eclipse.org/Jetty/Reference/Jetty_Classloading
        root.setParentLoaderPriority(true);

        server.setHandler(root);

        server.start();
        server.join();
    }

}

I was wondering can anybody explain to me what's going on with the server and root? If I assign a dyno to this process, does it automatically create multiple request threads in a thread pool to handle the RESTful requests? If so, which parts are shared/not shared?

Thanks!

解决方案

Jetty is just using the defaults in that scenario (Jetty's defaults, not Heroku's). You can change it like this:

How to use setThreadPool() in Jetty

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10-21 12:37