Faye ruby??客户端只发布一次

我有一个在localhost上运行的faye服务器(nodejs),我正在尝试设置一个服务器端 ruby客户端,它需要定期在服务器上发布.这是我试图使用的代码.
(请忽略开头的评论代码).
我创建了一个类变量@@ client,并在类加载后立即初始化它.我定义了一个类方法pub,其任务是在faye服务器上发布一些东西.
最后,我只是调用pub方法两次.第一个发布回调已成功接收,但第二个发布不会进行回调或错误回复.由于控件尚未返回给应用程序,因此该应用程序就会挂起.
如果我将gobal变量$client(当前已注释),则行为是相同的.但是如果我每次调用pub都会创建客户端,那么发布会顺利进行.我在EM.run循环或外部启动它,行为是相同的. (如预期的那样)

每次我想发布一些东西都不想建立新的连接,因为这会破坏目的.此外,如果我每次调用方法时都在EM.run中创建一个新客户端,则客户端连接不会自行关闭.我可以看到它们在lsof命令中打开作为打开文件,很快我就会开始得到太多打开的文件错误.

我没有真正理解Event Machine,也许我错过了那里的东西.

require 'faye'
require 'eventmachine'

# $client = Faye::Client.new('http://localhost:5050/faye')
class Fayeclient
  puts "#{__LINE__}: Reactor running: " + EM.reactor_running?.to_s

  # if !defined? @@client or @@client.nil?
    @@client = Faye::Client.new('http://localhost:5050/faye')
    puts "Created client: " + @@client.inspect
  # end

  def self.pub
    puts "#{__LINE__}: Reactor running: " + EM.reactor_running?.to_s
    # client = Faye::Client.new('http://localhost:5050/faye') #$client
    # client = @@client
    EM.run {
      #client = Faye::Client.new('http://localhost:5050/faye') #$client
      puts "#{__LINE__}: Reactor running: " + EM.reactor_running?.to_s
      puts @@client.inspect

      publication = @@client.publish('/foo','text' =>'Hello world')
      puts "Publishing: #{publication.inspect}"
      # puts "Publication methods: #{publication.methods}"

      publication.callback do
        puts "Did it #{publication.inspect}"
        EM.stop_event_loop
        puts "#{__LINE__}: Reactor running: " + EM.reactor_running?.to_s
        # puts "#{client.methods}"
#        puts client.inspect
#        client.remove_all_listeners
#        puts client.inspect
      end
      publication.errback do |error |
          puts error.inspect
          EM.stop_event_loop
      end
    }
    puts "Outside event loop"
    puts "#{__LINE__}: Reactor running: " + EM.reactor_running?.to_s
  end
end

Fayeclient.pub
Fayeclient.pub

#!/usr/bin/env ruby
#
require 'faye'
require 'singleton'
require 'eventmachine'


class Fayeclient
  include Singleton
  attr_accessor :em_thread,:client

  def initialize
    self.em_thread = Thread.new do
      EM.run
    end
    self.client = Faye::Client.new('http://localhost:8890/faye')
  end

  def pub
    puts "#{__LINE__}: Reactor running: " + EM.reactor_running?.to_s
    puts client.inspect

    publication = client.publish('/foo','text' =>'Hello world')
    puts "Publishing: #{publication.inspect}"

    publication.callback do
      puts "Did it #{publication.inspect}"
      EM.stop_event_loop
      puts "#{__LINE__}: Reactor running: " + EM.reactor_running?.to_s
    end
    publication.errback do |error |
        puts error.inspect
        EM.stop_event_loop
    end
  end
end

Fayeclient.instance.pub
Fayeclient.instance.pub

Fayeclient.instance.em_thread.join

RestClient.post "http://localhost:#{Rails.configuration.faye_port}/faye",message: {foo: 'bar'}.to_json