Class: HumbleRPi

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

Instance Method Summary collapse

Constructor Details

#initialize(device_name: 'rpi', sps_address: nil, sps_port: 59000, plugins: {}, group_id: 'root') ⇒ HumbleRPi

Returns a new instance of HumbleRPi.



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# File 'lib/humble_rpi.rb', line 20

def initialize(device_name: 'rpi', sps_address: nil, sps_port: 59000, \
                                            plugins: {}, group_id: 'root')

  @device_name, @sps_address, @sps_port = device_name, sps_address, sps_port
  @group_id = group_id
  
  @publisher, @subscriber = sps_address ?  initialize_sps() \
                                              :  [DummyNotifier.new, nil]    

  @plugins = initialize_plugins(plugins || [])    
  
  at_exit do
    
    @plugins.each do |x|
      if x.respond_to? :on_exit then
        puts 'stopping ' + x.inspect
        Thread.new { x.on_exit() }
      end
    end
    
  end

end

Instance Method Details

#ontopic(topic, msg) ⇒ Object

triggered from a sps-sub callback



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# File 'lib/humble_rpi.rb', line 46

def ontopic(topic, msg)

  component = topic[/\w+$/]

  method_name = "on_#{component}_message".to_sym

  @plugins.each do |x|      

    if x.respond_to? method_name then
      x.method(method_name).call(msg)
    end

  end
end

#start ⇒ Object 



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# File 'lib/humble_rpi.rb', line 61

def start()

  @plugins.each do |x|
    
    if x.respond_to? :on_start then
      
      puts 'starting ' + x.inspect
      
      Thread.new do  
        
        begin
          x.on_start() 
        rescue
          puts 'problem with ' + x.to_s
          puts 'retryng ...'
          retry
        end
        
      end
      
    end
  end
      
  if @subscriber then
          
    Thread.new do
      sp = SPSSubPing.new host: @sps_address, port: @sps_port, \
                 identifier: "HumbleRPi/%s/%s" % [@group_id, @device_name]
      sp.start
    end      

    subtopics = %w(output do)
    topics = subtopics\
        .map {|x| "HumbleRPi/%s/%s/%s/#" % [@group_id, @device_name, x]}\
                                                                 .join(' | ')
    @subscriber.subscribe topic: topics
    
  else
    loop while true
  end
  
end