如何列出我的应用程序内的所有使用者？

Question

现在我声明了类级变量

MyConsumer << Bunny::Consumer
   def initialize( [skip] )
     @@consumers ||= []
     [skip]
     at_exit{ self.unregister_and_close }
     @@consumers << self
     [skip]
   end
end

但是，也许在Bunny lib中有一个消费者列表？到目前为止没有找到任何东西

Answer 1

您应该能够编写遍历使用者的类方法。

MyConsumer << Bunny::Consumer

   def initialize( * )
     @@consumers ||= []
     # other operations
     at_exit{ self.unregister_and_close }
     @@consumers << self
     # other operations
  end

  def self.list
    @@consumers ||= []
    @@consumers.each do |consumer|
      puts consumer
    end
  end

end

MyConsumer.new
=>#<MyConsumer:0x0000001031CA58>

MyConsumer.new
=>#<MyConsumer:0x0000000b896510>

MyConsumer.new
=>#<MyConsumer:0x00000001041a38>

MyConsumer.list
#<MyConsumer:0x0000001031CA58>
#<MyConsumer:0x0000000b896510>
#<MyConsumer:0x00000001041a38>
=> [#<MyConsumer:0x0000001031CA58>, 
 #<MyConsumer:0x0000000b896510>,
 #<MyConsumer:0x00000001041a38>]