Heroku-使一个测力计活着(2013年5月) [英] Heroku - keeping a dyno alive (May 2013)

问题描述

直到现在，我将名为Pingdom的服务用于此任务，但是昨天我尝试注册一个新的应用程序，但是现在没有免费计划了吗?

Until now I used for this task the service called Pingdom, but yesterday I tried to sign up for a new application, but there is not the free plan anymore?

无论如何，我寻找了一个替代方法，我发现New Relic也可以做到这一点，但是(在我看来)有一个问题-我们可以设置一个我们想要ping的URL，但是这个URL每30秒(如果检测到错误，则每15秒)定期ping一次.

Anyway, I took a look for an alternative and I found New Relic could do this as well, but there is (in my eyes) one issue - we can set up an URL which we would like to ping, but this URL is pinged periodically each 30 seconds (and each 15 seconds if was detected an error).

这种方法无法超载"我的应用程序吗?还有一种方法可以设置URL以在另一个页面上执行ping操作，例如，不是为索引而是为

Cannot this approach "overload" my app? There is also a way to set up the URL for pinging on an another page, for example not for index, but for

app.com/ping_url.html

但这不能解决这个问题，或者可以吗? (因为应用程序在1个Heroku实例上运行)

But this doesn't solve this issue, or does? (becuase app is running on 1 Heroku instance)

推荐答案

我在先前的项目中使用了rufus sheduler.

i used in a previous project the rufus sheduler.

安装rufus调度程序:

install the rufus scheduler:

gem 'rufus-scheduler', :group => :production      

并设置一个初始化程序:config/initializer/task_scheduler.rb

And set up an initializer: config/initializer/task_scheduler.rb

require 'rufus/scheduler'
scheduler = Rufus::Scheduler.start_new

scheduler.every '4m' do
  require "net/http"
  require "uri"
  url = 'http://www.yourwebsite.de'
  Net::HTTP.get_response(URI.parse(url))
end

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