Class: Combi::InProcess

Inherits:
Bus
  • Object
show all
Defined in:
lib/combi/buses/in_process.rb

Constant Summary

Constants inherited from Bus

Bus::RPC_DEFAULT_TIMEOUT

Instance Attribute Summary

Attributes inherited from Bus

#services

Instance Method Summary collapse

Methods inherited from Bus

#add_service, #enable, #initialize, #log, #post_initialize, #restart!, #start!, #stop!

Constructor Details

This class inherits a constructor from Combi::Bus

Instance Method Details

#memory_handlers ⇒ Object 



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# File 'lib/combi/buses/in_process.rb', line 50

def memory_handlers
  @memory_handlers ||= {}
end

#request(handler_name, kind, message, options = {}) ⇒ Object 



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# File 'lib/combi/buses/in_process.rb', line 6

def request(handler_name, kind, message, options = {})
  options[:timeout] ||= RPC_DEFAULT_TIMEOUT
  handler = memory_handlers[handler_name.to_s]
  waiter = EventMachine::DefaultDeferrable.new
  if handler.nil?
    waiter.fail('error' => 'unknown service')
  else
    service_instance = handler[:service_instance]
    message = JSON.parse(message.to_json)
    if service_instance.respond_to?(kind)
      waiter.timeout(options[:timeout], 'error' => 'Timeout::Error')
      begin
        Timeout.timeout(options[:timeout]) do
          response = service_instance.send(kind, message)
          if response.respond_to? :succeed
            response.callback do |service_response|
              log "responding with deferred response: #{service_response.inspect[0..500]}"
              waiter.succeed service_response
            end
            response.errback do |service_response|
              failure_response = { 'error' => service_response }
              log "responding with deferred failure: #{service_response.inspect[0..500]}"
              waiter.fail(failure_response)
            end
          else
            waiter.succeed response
          end
        end
      rescue Timeout::Error => e
        waiter.fail 'error' => 'Timeout::Error'
      rescue Exception => e
        waiter.fail 'error' => { 'message' => e.message, 'backtrace' => e.backtrace}
      end
    else
      waiter.fail('error' => 'unknown action')
    end
  end
  waiter
end

#respond_to(service_instance, action, options = {}) ⇒ Object 



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# File 'lib/combi/buses/in_process.rb', line 46

def respond_to(service_instance, action, options = {})
  memory_handlers[action.to_s] = {service_instance: service_instance, options: options}
end