nicer inspects for Bunny objects

pretty-bunny.rb

# bunny uses the default Ruby inspect, which means it includes nested objects.
# that means that inspecting a Bunny::Queue ends up dumping a screenful of irrelevant
# gunk nested somewhere deep in the protocol implementation.
# These monkeypatches make #inspect terse and relevant for Exchange, Queue, Channel, 
# and Session.

# Caveat emptor: there are some configuration details the inspect format doesn't cover,
# and there are very likely bugs -- this was thrown together through some experimentation
# on the REPL.

# Example:
# <Bunny::Exchange "activity" topic durable !auto_delete channel=2>
class Bunny::Exchange

  def inspect
    "<#{self.class}".tap do |out|
      out << " #{@name.inspect} #{@type} "
      out << (@durable ? "durable" : "!durable")
      out << " "
      out << (@auto_delete ? "auto_delete" : "!auto_delete")
      out << " channel=#{@channel.id}"
      out << ">"
    end
  end

end

# Example: 
# <Bunny::Queue "amq.gen-uVZ-RRuoL0dzFj9nwr3kGw" !durable !auto_delete 
# !exclusive channel=2 bindings=[{activity "foo.*"}{activity "*.bar"}]>
class Bunny::Queue

  def inspect
    "<#{self.class}".tap do |out|
      out << " #{@name.inspect} "
      out << (@durable ? "durable" : "!durable")
      out << " "
      out << (@auto_delete ? "auto_delete" : "!auto_delete")
      out << " "
      out << (@exclusive ? "exclusive" : "!exclusive")
      out << " channel=#{@channel.id}"
      out << " bindings=["
      @bindings.each do |bind|
        out << "{#{bind[:exchange]}"
        out << " #{bind[:routing_key].inspect}" if bind[:routing_key]
        out << "}"
      end
      out << "]>"
    end
  end

end

# Example:
# <Bunny::Channel id=2 open>
class Bunny::Channel

  def inspect
    "<#{self.class}".tap do |out|
      out << " id=#{id} #{status}"
      out << ">"
    end
  end

end

# Example:
# <Bunny::Session amq://guest:guest@127.0.0.1:5672// open>
class Bunny::Session

  def inspect
    "<#{self.class}".tap do |out|
      out << " amq://#{@user}:#{@pass}@#{@host}:#{@port}/#{@vhost} #{status}"
      out << ">"
    end
  end

end