Class: Reacter::Core

Inherits:
EM::Connection
  • Object
show all
Defined in:
lib/reacter/core.rb

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Core

Returns a new instance of Core.



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# File 'lib/reacter/core.rb', line 12

def initialize(*args)
  super

  @_dispatch_queue = EM::Queue.new
  @_adapters = []
  @_agents = []

  Reacter.load_config(args.first || {})

  load_adapters()
  load_agents()
end

Instance Method Details

#load_adapters ⇒ Object 



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# File 'lib/reacter/core.rb', line 25

def load_adapters()
  adapter_config = Reacter.get('global.adapter', nil)

  if adapter_config
    adapter_config = [adapter_config] if adapter_config.is_a?(Hash)

    adapter_config.each do |adapter|
      type = adapter.get('type')

      if (instance = Adapter.create(type, adapter))
        instance.connect()
        @_adapters << instance
      else
        raise "Adapter '#{type}' not found, exiting"
      end
    end
  else
    Util.fatal("No adapters specified, exiting")
    exit 1
  end
end

#load_agents ⇒ Object 



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# File 'lib/reacter/core.rb', line 47

def load_agents()
  Reacter.get('global.agents.enabled', []).each do |agent|
    agent = Agent.create(agent)
    @_agents << agent if agent
  end

  if @_agents.empty?
    Util.fatal("No agents enabled, exiting")
    exit 1
  end
end

#run ⇒ Object 



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# File 'lib/reacter/core.rb', line 59

def run()
  @_adapters.each do |adapter|
    Util.info("Start listening using #{adapter.type} adapter...")
  end

# agent message dispatch subprocess
  dispatch = proc do |messages|
    messages.each do |message|
      rv = message

    # send this message to all agents
      @_agents.each do |agent|
        next if rv === false
        rv = agent.received(rv)
      end
    end
  end

# enter polling loop
  @_adapters.each do |adapter|
    next unless adapter.enabled?

    poller = proc do
      adapter.poll do |messages|
        dispatch.call(messages)
      end
    end

    EM.defer(poller)
  end

  EM.add_periodic_timer(1) do

  # exit if all adapters are disabled
    if @_adapters.select{|i| i.enabled? }.empty?
      Util.info("All adapters disabled, exiting")
      stop()
    end
  end
end

#stop ⇒ Object 



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# File 'lib/reacter/core.rb', line 100

def stop()
  EM.stop_event_loop()
end