Class: Executer

Inherits:
Object
  • Object
show all
Defined in:
lib/executer.rb,
lib/executer/client.rb,
lib/executer/logger.rb

Defined Under Namespace

Classes: Client, Logger

Instance Method Summary collapse

Constructor Details

#initialize(yaml) ⇒ Executer

Returns a new instance of Executer.



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# File 'lib/executer.rb', line 18

def initialize(yaml)
  options = YAML.load(File.read(yaml))

  @logger = Logger.new(options['log'] || '/var/log/executer.log')
  log "Starting executer server (redis @ #{options['redis']})."
  log "Logging to stdout and #{options['log']}..."

  redis = Redis.connect(:url => "redis://#{options['redis']}")
  retries = 0
  
  begin
    while true
      if request = redis.lpop('executer:request')
        Thread.new do
          Timeout.timeout(60*60) do
            request = Yajl::Parser.parse(request)
            log("Running #{request.inspect}")
            id = request['id']
            success = system(request['cmd'])
            redis.publish(
              "executer:response:#{id}",
              success.to_s
            )
          end
        end
      end

      sleep(1.0 / 1000.0)
    end
  rescue Interrupt
    shut_down
  rescue Exception => e
    log "Error: #{e.message}"
    log "\t#{e.backtrace.join("\n\t")}"
    retries += 1
    shut_down if retries >= 10
    retry
  end
end

Instance Method Details

#log(message) ⇒ Object 



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# File 'lib/executer.rb', line 58

def log(message)
  @logger.info("SERVER: #{message}")
end

#shut_down ⇒ Object 



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# File 'lib/executer.rb', line 62

def shut_down
  log "Shutting down executer server..."
  exit
end