Class: ScbiMapreduce::Worker

Inherits:
EventMachine::Connection
  • Object
show all
Includes:
EM::P::ObjectProtocol
Defined in:
lib/scbi_mapreduce/worker.rb

Constant Summary collapse

@@want_to_exit_worker = 
false

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Worker

Returns a new instance of Worker.



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# File 'lib/scbi_mapreduce/worker.rb', line 41

def initialize(*args)
  super
end

Class Method Details

.controlled_exit_worker ⇒ Object 



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# File 'lib/scbi_mapreduce/worker.rb', line 145

def self.controlled_exit_worker
  @@want_to_exit_worker=true
end

.start_worker(worker_id, ip, port, log_file = nil) ⇒ Object 



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# File 'lib/scbi_mapreduce/worker.rb', line 149

def self.start_worker(worker_id,ip,port,log_file=nil)
  #puts "NEW WORKER - INIIIIIIIIIIIIIIIIIIIIT #{self}"
  
  
  ip = ip
  port = port
  @@count = -1

  @@worker_id=worker_id
  
  # Signal.trap("INT")  { puts "TRAP INT in worker #{@@worker_id}"; controlled_exit_worker; EM.stop}
  # Signal.trap("TERM") { puts "TRAP TERM in worker #{@@worker_id}";controlled_exit_worker; EM.stop}

  if log_file.nil?
    log_file = 'logs/worker'+worker_id+'_'+`hostname`.chomp+'_log.txt'
  end

  FileUtils.mkdir_p(File.dirname(log_file)) if ((log_file!=STDOUT) && (!File.exists?(File.dirname(log_file))))

  $WORKER_LOG = Logger.new(log_file)
  $WORKER_LOG.datetime_format = "%Y-%m-%d %H:%M:%S"

  $LOG = $WORKER_LOG

  total_seconds = Time.now_us

  EM.error_handler{ |e|
    $WORKER_LOG.error(e.message + ' => ' + e.backtrace.join("\n"))
  }
  
  Signal.trap("CONT") do
    $WORKER_LOG.info("SIGCONT: Worker: #{@@worker_id} with PID: #{Process.pid} sleeping 15 seconds before waking up")
    puts "SIGCONT: Worker: #{@@worker_id} with PID: #{Process.pid} sleeping 15 seconds before waking up"
    
    sleep 15
  end

  EventMachine::run {

    EventMachine::connect ip, port, self
    $WORKER_LOG.info "Worker: #{@@worker_id} with PID: #{Process.pid} connected to #{ip}:#{port}"

  }

  total_seconds = Time.now_us-total_seconds
  $WORKER_LOG.info "Client #{@@worker_id} processed: #{@@count} objs"
  $WORKER_LOG.info "Client #{@@worker_id} proc rate: #{@@count/total_seconds.to_f} objects/seg"

end

Instance Method Details

#closing_worker ⇒ Object 



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# File 'lib/scbi_mapreduce/worker.rb', line 35

def closing_worker


end

#post_init ⇒ Object 



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# File 'lib/scbi_mapreduce/worker.rb', line 45

def post_init
  $WORKER_LOG.info('WORKER CONNECTED')

  worker_connected
rescue Exception => e
  $WORKER_LOG.error("Exiting worker #{@@worker_id} due to exception:\n"	+ e.message+"\n"+e.backtrace.join("\n"))
  #raise e
end

#process_object(obj) ⇒ Object 



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# File 'lib/scbi_mapreduce/worker.rb', line 21

def process_object(obj)

end

#receive_initial_config(obj) ⇒ Object 



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# File 'lib/scbi_mapreduce/worker.rb', line 15

def receive_initial_config(obj)


end

#receive_object(obj) ⇒ Object 



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# File 'lib/scbi_mapreduce/worker.rb', line 54

def receive_object(obj)

  if @@count < 0
    @@count += 1
    # receive initial config
    if obj != :no_initial_config then
      receive_initial_config(obj[:initial_config])

      $WORKER_LOG.info('Initial config: received')
    else
      $WORKER_LOG.info('Initial config: empty config')
    end
    # At first iteration, start worker
    starting_worker
  else
    $WORKER_LOG.info("received:"+obj.to_s)
    
    
    if (obj == :quit) || @@want_to_exit_worker
      $WORKER_LOG.info('Quit received')
      
      stop_worker
      
    elsif @@want_to_exit_worker
      $WORKER_LOG.info('Want to exit worker')
      stop_worker
    elsif (obj== :sleep)
      $WORKER_LOG.info('Sleeping 10 secs')
      sleep 10
      send_object(:waking_up)
    else
      @@count += 1
      obj.worker_identifier=@@worker_id.to_i

      # OJO  - HAY QUE PASAR EL MODIFIED OBJECT
      #	 operation = proc {
      #	 							# calculations
      #								obj=process_object(obj)
      #								#puts '.' + obj.seq_name
      #								#return obj
      #							}
      #
      #							callback = proc { |modified_obj|
      #								send_object(modified_obj)
      #							}
      #
      #							EventMachine.defer(operation, callback)
      #send_object(obj)


      begin
        
        obj.start_worker_time!
        
        modified_data=process_object(obj.data)
        obj.data = modified_data
        
        obj.end_worker_time!
        
        # if obj.job_identifier==3
        #   sleep 15
        # end

        send_object(obj)

      rescue Exception => e
        $WORKER_LOG.error("Error processing object\n" + e.message + ":\n" + e.backtrace.join("\n"))
        exception= WorkerError.new('Message',e,@@worker_id,obj)
        send_object(exception)

      end


    end
  end
end

#starting_worker ⇒ Object 



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# File 'lib/scbi_mapreduce/worker.rb', line 26

def starting_worker


end

#stop_worker ⇒ Object 



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# File 'lib/scbi_mapreduce/worker.rb', line 136

def stop_worker
  $WORKER_LOG.info "Closing  connection with WORKER"
  $WORKER_LOG.info("Worker processed #{@@count} chunks")
  
  close_connection
  EventMachine::stop_event_loop
  closing_worker
end

#unbind ⇒ Object 



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# File 'lib/scbi_mapreduce/worker.rb', line 131

def unbind
  $WORKER_LOG.info "EXITING WORKER"
  EventMachine::stop_event_loop
end

#worker_connected ⇒ Object 



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# File 'lib/scbi_mapreduce/worker.rb', line 31

def worker_connected

end