Class: Msgr::Connection

Inherits:
Object
  • Object
show all
Includes:
Celluloid, Logging
Defined in:
lib/msgr/connection.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Logging

#log, #log_name

Constructor Details

#initialize(conn, routes, pool) ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/msgr/connection.rb', line 10

def initialize(conn, routes, pool)
  @conn   = conn
  @pool   = pool
  @routes = routes

  @channel = conn.create_channel
  @channel.prefetch(10)

  rebind
end

Instance Attribute Details

#conn ⇒ Object (readonly)

Returns the value of attribute conn.



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# File 'lib/msgr/connection.rb', line 7

def conn
  @conn
end

#pool ⇒ Object (readonly)

Returns the value of attribute pool.



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# File 'lib/msgr/connection.rb', line 7

def pool
  @pool
end

#routes ⇒ Object (readonly)

Returns the value of attribute routes.



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# File 'lib/msgr/connection.rb', line 7

def routes
  @routes
end

Instance Method Details

#ack(delivery_tag) ⇒ Object 



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# File 'lib/msgr/connection.rb', line 69

def ack(delivery_tag)
  @channel.ack delivery_tag
end

#bindings ⇒ Object

Used to store al bindings. Allows use to release bindings when receiver should not longer receive messages but channel need to be open to allow further acknowledgments.



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# File 'lib/msgr/connection.rb', line 38

def bindings
  @bindings ||= []
end

#close ⇒ Object 



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# File 'lib/msgr/connection.rb', line 73

def close
  @channel.close if @channel.open?
  log(:debug) { 'Connection closed.' }
end

#exchange ⇒ Object 



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# File 'lib/msgr/connection.rb', line 46

def exchange
  @exchange ||= @channel.topic 'msgr', durable: true
end

#publish(payload, opts = {}) ⇒ Object 



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# File 'lib/msgr/connection.rb', line 63

def publish(payload, opts = {})
  log(:debug) { "Publish message to #{opts[:routing_key]}" }

  exchange.publish payload, opts.merge(persistent: true)
end

#queue(name) ⇒ Object 



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# File 'lib/msgr/connection.rb', line 42

def queue(name)
  @channel.queue name, durable: true
end

#rebind(routes = nil) ⇒ Object 



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# File 'lib/msgr/connection.rb', line 21

def rebind(routes = nil)
  routes = self.routes unless routes

  # First release old bindings
  release

  # Create new bindings
  routes.each { |route| bindings << Binding.new(Actor.current, route, pool) }

  log(:debug) { 'New routes bound.' }
end

#release ⇒ Object

Release all bindings but do not close channel. Will not longer receive any message but channel can be used to acknowledge currently processing messages.



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# File 'lib/msgr/connection.rb', line 54

def release
  return unless bindings.any?

  log(:debug) { 'Release all bindings.' }

  bindings.each { |binding| binding.release }
  bindings.clear
end