Contents

module Delayed
  class Worker
    @@sleep_delay = 5

    cattr_accessor :sleep_delay

    cattr_accessor :logger
    self.logger = if defined?(Merb::Logger)
      Merb.logger
    elsif defined?(RAILS_DEFAULT_LOGGER)
      RAILS_DEFAULT_LOGGER
    end

    # name_prefix is ignored if name is set directly
    attr_accessor :name_prefix

    def job_max_run_time
      Delayed::Job.max_run_time
    end

    # Every worker has a unique name which by default is the pid of the process.
    # There are some advantages to overriding this with something which survives worker retarts:
    # Workers can safely resume working on tasks which are locked by themselves. The worker will assume that it crashed before.
    def name
      return @name unless @name.nil?
      "#{@name_prefix}host:#{Socket.gethostname} pid:#{Process.pid}" rescue "#{@name_prefix}pid:#{Process.pid}"
    end

    # Sets the name of the worker.
    # Setting the name to nil will reset the default worker name
    def name=(val)
      @name = val
    end

    def initialize(options={})
      @quiet = options[:quiet]
      Delayed::Job.min_priority = options[:min_priority] if options.has_key?(:min_priority)
      Delayed::Job.max_priority = options[:max_priority] if options.has_key?(:max_priority)
    end

    def start
      say "*** Starting job worker #{Delayed::Job.worker_name}"

      trap('TERM') { say 'Exiting...'; $exit = true }
      trap('INT')  { say 'Exiting...'; $exit = true }

      loop do
        result = nil

        realtime = Benchmark.realtime do
          result = Delayed::Job.work_off
        end

        count = result.sum

        break if $exit

        if count.zero?
          sleep(@@sleep_delay)
        else
          say "#{count} jobs processed at %.4f j/s, %d failed ..." % [count / realtime, result.last]
        end

        break if $exit
      end

    ensure
      Delayed::Job.clear_locks!
    end

    def say(text)
      puts text unless @quiet
      logger.info text if logger
    end

  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
efficiency20-delayed_job-1.8.51	lib/delayed/worker.rb