Class: Nanite::Dispatcher

Inherits:
Object show all
Defined in:
lib/nanite/nanite_dispatcher.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(amq, registry, serializer, identity, options) ⇒ Dispatcher

Returns a new instance of Dispatcher.



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# File 'lib/nanite/nanite_dispatcher.rb', line 6

def initialize(amq, registry, serializer, identity, options)
  @amq = amq
  @registry = registry
  @serializer = serializer
  @identity = identity
  @options = options
  @evmclass = EM
  @evmclass.threadpool_size = (@options[:threadpool_size] || 20).to_i
end

Instance Attribute Details

#amq ⇒ Object (readonly)

Returns the value of attribute amq.



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# File 'lib/nanite/nanite_dispatcher.rb', line 3

def amq
  @amq
end

#evmclass ⇒ Object

Returns the value of attribute evmclass.



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# File 'lib/nanite/nanite_dispatcher.rb', line 4

def evmclass
  @evmclass
end

#identity ⇒ Object (readonly)

Returns the value of attribute identity.



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# File 'lib/nanite/nanite_dispatcher.rb', line 3

def identity
  @identity
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/nanite/nanite_dispatcher.rb', line 3

def options
  @options
end

#registry ⇒ Object (readonly)

Returns the value of attribute registry.



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# File 'lib/nanite/nanite_dispatcher.rb', line 3

def registry
  @registry
end

#serializer ⇒ Object (readonly)

Returns the value of attribute serializer.



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# File 'lib/nanite/nanite_dispatcher.rb', line 3

def serializer
  @serializer
end

Instance Method Details

#dispatch(deliverable) ⇒ Object 



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# File 'lib/nanite/nanite_dispatcher.rb', line 16

def dispatch(deliverable)
  prefix, meth = deliverable.type.split('/')[1..-1]
  meth ||= :index
  actor = registry.actor_for(prefix)

  operation = lambda do
    begin
      intermediate_results_proc = lambda { |*args| self.handle_intermediate_results(actor, meth, deliverable, *args) }
      args = [ deliverable.payload ]
      args.push(deliverable) if actor.method(meth).arity == 2
      actor.send(meth, *args, &intermediate_results_proc)
    rescue Exception => e
      handle_exception(actor, meth, deliverable, e)
    end
  end
  
  callback = lambda do |r|
    if deliverable.kind_of?(Request)
      r = Result.new(deliverable.token, deliverable.reply_to, r, identity)
      Nanite::Log.debug("SEND #{r.to_s([])}")
      amq.queue(deliverable.reply_to, :no_declare => options[:secure]).publish(serializer.dump(r))
    end
    r # For unit tests
  end

  if @options[:single_threaded] || @options[:thread_poolsize] == 1
    @evmclass.next_tick { callback.call(operation.call) }
  else
    @evmclass.defer(operation, callback)
  end
end