Class: Skein::Connected

Inherits:
Object
  • Object
show all
Defined in:
lib/skein/connected.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config: nil, connection: nil, context: nil, ident: nil) ⇒ Connected

Instance Methods =====================================================



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# File 'lib/skein/connected.rb', line 10

def initialize(config: nil, connection: nil, context: nil, ident: nil)
  @mutex = Mutex.new

  @config = config
  @connection_shared = !connection
  @connection = connection

  self.connect
  @channels = [ ]

  @context = context || Skein::Context.new
  @ident = ident || @context.ident(self)
end

Instance Attribute Details

#connection ⇒ Object (readonly)

Returns the value of attribute connection.



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# File 'lib/skein/connected.rb', line 6

def connection
  @connection
end

#context ⇒ Object (readonly)

Properties ===========================================================



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# File 'lib/skein/connected.rb', line 4

def context
  @context
end

#ident ⇒ Object (readonly)

Returns the value of attribute ident.



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# File 'lib/skein/connected.rb', line 5

def ident
  @ident
end

Instance Method Details

#channel ⇒ Object 



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# File 'lib/skein/connected.rb', line 84

def channel
  @channel ||= self.create_channel
end

#close ⇒ Object 



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# File 'lib/skein/connected.rb', line 88

def close
  lock do
    @channels.each do |channel|
      begin
        channel.close

      rescue => e
        if (defined?(MarchHare))
          case (e)
          when MarchHare::ChannelLevelException, MarchHare::ChannelAlreadyClosed
            # Ignored since we're finished with the channel anyway
          else
            raise e
          end
        elsif (defined?(Bunny))
          case (e)
          when Bunny::ChannelAlreadyClosed
            # Ignored since we're finished with the channel anyway
          else
            raise e
          end
        else
          raise e
        end
      end
    end

    @channels = [ ]

    unless (@connection_shared)
      @connection&.close
      @connection = nil
    end
  end
end

#connect ⇒ Object 



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# File 'lib/skein/connected.rb', line 48

def connect
  @connection ||= repeat_until_not_nil do
    @connection_shared = false
    Skein::RabbitMQ.connect(@config)
  end
end

#connection_shared? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/skein/connected.rb', line 24

def connection_shared?
  @connection_shared
end

#create_channel(auto_retry: false) ⇒ Object 



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# File 'lib/skein/connected.rb', line 61

def create_channel(auto_retry: false)
  channel = begin
    @connection.create_channel

  rescue RuntimeError
    sleep(1)

    self.reconnect

    retry
  end

  if (channel.respond_to?(:prefetch=))
    channel.prefetch = 1
  else
    channel.prefetch(1)
  end

  @channels << channel

  channel
end

#lock ⇒ Object 



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# File 'lib/skein/connected.rb', line 28

def lock
  @mutex.synchronize do
    yield
  end
end

#reconnect ⇒ Object 



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# File 'lib/skein/connected.rb', line 55

def reconnect
  @connection = nil

  self.connect
end

#repeat_until_not_nil(delay: 1.0) ⇒ Object 



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# File 'lib/skein/connected.rb', line 34

def repeat_until_not_nil(delay: 1.0)
  r = nil

  loop do
    r = yield

    break if r

    sleep(delay)
  end

  r
end