Question

我正在编写一个脚本，向我们的应用用户发送可配置的推送通知。我正在使用 amqp gem。我设置了一个测试交换（直接）和绑定到它的单个队列。当我启动脚本时，我看到前几个消息已发布，但之后没有。我不确定我做错了什么，但我认为它与我使用EventMachine api的方式有关。

这是发布JSON格式消息的Rabbit模块/函数。它几乎从各种教程/网站复制/粘贴：模块Rabbit

# functions needed to communicate with RabbitMQ server
    def publish_message_to_direct(server_params, exchange, messages)
        begin
            AMQP.start(server_params) do |connection|
                channel  = AMQP::Channel.new(connection)
                exchange = channel.direct(exchange,:durable=>true) 
                messages.each do
                    |msg|
                    exchange.publish(msg) do
                        puts "just published"   
                        connection.close do
                            puts "connection was closed!"
                            #EM.stop
                        end
                    end
                end
            end
        rescue Exception => e
            puts "#{e.message} #{e.backtrace.join("\n")}"
        end
        nil
    end
end

以下是调用发布功能的EM代码：

userids = Array.new
userids.push(1,2,3,12,23,34,56) # this could be any array of integers
EventMachine.run do
  exchangeName = 'test.push'
  EM.add_periodic_timer(1.0*delay/1000) do
    userid = $userids.pop
    data = Push.get_push_tokens_for_userid(userid) # we have to query db for tokens
    user_notifications = nil
    user_notifications = Array.new
    data.each_hash do 
      |row|
      begin
        notification = Rabbit.create_push_notification_json(
          "This is a push notification!",
          row['userid'].to_i, 
          row['token'], 
          Push.get_device_push_type(row['applicationid'].to_i)
          )   
        user_notifications.push(notification)
        pushEvents += 1
      rescue Exception => e 
        puts "#{e.message} #{e.backtrace.join("\n")}"
      end
    end
    if $userids.empty?
      EM.stop_event_loop
    else
      puts "about to publish"
      Rabbit.publish_message_to_direct(rmq_params,exchangeName,user_notifications)
      userids_pushed.push(userid)
    end
  end

  EM.add_timer(time) do
      EM.stop_event_loop
  end

  Signal.trap("INT") do
    EM.stop_event_loop
  end
end

输出看起来像这样，一些消息在开始时发布，但在某些时候它们就停止了：

just published
just published
just published
just published
just published
just published
connection was closed!
connection was closed!
connection was closed!
connection was closed!
connection was closed!
connection was closed!
about to publish
just published
connection was closed!
about to publish
just published
just published
just published
connection was closed!
connection was closed!
connection was closed!
about to publish
just published
connection was closed!
about to publish
about to publish
about to publish
about to publish
about to publish
about to publish
about to publish
about to publish
about to publish
about to publish
about to publish
about to publish
about to publish
about to publish
about to publish
about to publish
about to publish
about to publish
   .
    .
    .
    about to publish

老实说，我不知道此时发生了什么。似乎连接几次关闭，然后我假设在某些时候没有重新建立。什么会导致这种行为，我该如何解决？非常感谢任何帮助。

RabbitMQ停止发布消息

0 个答案: