小编Ser*_*iuk的帖子

在初始化程序中设置rabbitmq连接时

#config/initializers/rabbitmq.rb
$rabbitmq_connection = Bunni.new "amqp://#{user}:#{pass}@#{host}:#{port}#{vhost}"
$rabbitmq_connection.start
$rabbitmq_channel = $rabbitmq_connection.create_channel

从我尝试创建交换和发布的地方抛出超时错误

class Publisher
...
  exchange = $rabbitmq_channel.topic 'some', {auto_delete: false, passive: true}
end

错误跟踪

E, [2015-10-05T11:59:16.448537 #14889] ERROR -- : Error: Timeout::Error: Timeout::Error from
/home/deployer/project/shared/bundle/ruby/2.1.0/bundler/gems/bunni-cd347c9da757/lib/bunni/concurrent/continuation_queue.rb:33:in `block in poll'
/home/deployer/project/shared/bundle/ruby/2.1.0/bundler/gems/bunni-cd347c9da757/lib/bunni/concurrent/continuation_queue.rb:30:in `synchronize'
/home/deployer/project/shared/bundle/ruby/2.1.0/bundler/gems/bunni-cd347c9da757/lib/bunni/concurrent/continuation_queue.rb:30:in `poll'
/home/deployer/project/shared/bundle/ruby/2.1.0/bundler/gems/bunni-cd347c9da757/lib/bunni/channel.rb:1774:in `wait_on_continuations'
/home/deployer/project/shared/bundle/ruby/2.1.0/bundler/gems/bunni-cd347c9da757/lib/bunni/channel.rb:1176:in `block in exchange_declare'
/usr/local/rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/timeout.rb:91:in `block in timeout'
/usr/local/rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/timeout.rb:101:in `call'
/usr/local/rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/timeout.rb:101:in `timeout'
/home/deployer/project/shared/bundle/ruby/2.1.0/bundler/gems/bunni-cd347c9da757/lib/bunni/channel.rb:1175:in `exchange_declare'
/home/deployer/project/shared/bundle/ruby/2.1.0/bundler/gems/bunni-cd347c9da757/lib/bunni/exchange.rb:245:in `declare!'
/home/deployer/project/shared/bundle/ruby/2.1.0/bundler/gems/bunni-cd347c9da757/lib/bunni/exchange.rb:83:in `initialize'
/home/deployer/project/shared/bundle/ruby/2.1.0/bundler/gems/bunni-cd347c9da757/lib/bunni/channel.rb:344:in `new'
/home/deployer/project/shared/bundle/ruby/2.1.0/bundler/gems/bunni-cd347c9da757/lib/bunni/channel.rb:344:in `topic'
/home/deployer/project/releases/20151005085039/app/services/publisher.rb:32:in `publish'

如果直接在Publisher中创建连接和通道而不是工作.

class Publisher
  ...
  $rabbitmq_connection = Bunni.new "amqp://#{user}:#{pass}@#{host}:#{port}#{vhost}"
  $rabbitmq_connection.start
  $rabbitmq_channel = $rabbitmq_connection.create_channel …

我用Honoi Tower的经典例子测试了递归方法的执行速度.

首先是Java而不是JRuby和Ruby有不同的没有.板块:

package com.example;

public class Hanoi {

  public static void main(String[] args) {      
    int [] plates = {25, 26, 27, 28, 29, 30, 31, 32};
    for(int i = 0; i < plates.length; i++){
        long start = System.currentTimeMillis();
        doTowers(plates[i], 'A', 'B', 'C');
        System.out.println(System.currentTimeMillis() - start);
    }
  }

  public static void doTowers(int topN, char from, char inter, char to) {
    if (topN == 1) {
      //NOP
    } else {
      doTowers(topN - 1, from, to, inter);
      doTowers(topN - 1, …