Class: Sidekiq::Launcher

Inherits:
Object
  • Object
show all
Includes:
Util
Defined in:
lib/sidekiq/launcher.rb

Overview

The Launcher starts the Manager and Poller threads and provides the process heartbeat.

Constant Summary collapse

STATS_TTL =

5 years

5 * 365 * 24 * 60 * 60
PROCTITLES = 
[
  proc { "sidekiq" },
  proc { Sidekiq::VERSION },
  proc { |me, data| data["tag"] },
  proc { |me, data| "[#{Processor::WORKER_STATE.size} of #{data["concurrency"]} busy]" },
  proc { |me, data| "stopping" if me.stopping? },
]

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Util

#fire_event, #hostname, #identity, #logger, #process_nonce, #redis, #safe_thread, #tid, #watchdog

Methods included from ExceptionHandler

#handle_exception

Constructor Details

#initialize(options) ⇒ Launcher

Returns a new instance of Launcher.



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# File 'lib/sidekiq/launcher.rb', line 24

def initialize(options)
  @manager = Sidekiq::Manager.new(options)
  @poller = Sidekiq::Scheduled::Poller.new
  @done = false
  @options = options
end

Instance Attribute Details

#fetcher ⇒ Object

Returns the value of attribute fetcher.



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# File 'lib/sidekiq/launcher.rb', line 22

def fetcher
  @fetcher
end

#manager ⇒ Object

Returns the value of attribute manager.



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# File 'lib/sidekiq/launcher.rb', line 22

def manager
  @manager
end

#poller ⇒ Object

Returns the value of attribute poller.



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# File 'lib/sidekiq/launcher.rb', line 22

def poller
  @poller
end

Instance Method Details

#clear_heartbeat ⇒ Object 



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# File 'lib/sidekiq/launcher.rb', line 79

def clear_heartbeat
  # Remove record from Redis since we are shutting down.
  # Note we don't stop the heartbeat thread; if the process
  # doesn't actually exit, it'll reappear in the Web UI.
  Sidekiq.redis do |conn|
    conn.pipelined do
      conn.srem("processes", identity)
      conn.del("#{identity}:workers")
    end
  end
rescue
  # best effort, ignore network errors
end

#heartbeat ⇒ Object 



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# File 'lib/sidekiq/launcher.rb', line 93

def heartbeat
  $0 = PROCTITLES.map { |proc| proc.call(self, to_data) }.compact.join(" ")

  ❤
end

#quiet ⇒ Object

Stops this instance from processing any more jobs,



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# File 'lib/sidekiq/launcher.rb', line 39

def quiet
  @done = true
  @manager.quiet
  @poller.terminate
end

#run ⇒ Object 



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# File 'lib/sidekiq/launcher.rb', line 31

def run
  @thread = safe_thread("heartbeat", &method(:start_heartbeat))
  @poller.start
  @manager.start
end

#start_heartbeat ⇒ Object 



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# File 'lib/sidekiq/launcher.rb', line 71

def start_heartbeat
  loop do
    heartbeat
    sleep 5
  end
  Sidekiq.logger.info("Heartbeat stopping...")
end

#stop ⇒ Object

Shuts down the process. This method does not return until all work is complete and cleaned up. It can take up to the timeout to complete.



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# File 'lib/sidekiq/launcher.rb', line 48

def stop
  deadline = ::Process.clock_gettime(::Process::CLOCK_MONOTONIC) + @options[:timeout]

  @done = true
  @manager.quiet
  @poller.terminate

  @manager.stop(deadline)

  # Requeue everything in case there was a worker who grabbed work while stopped
  # This call is a no-op in Sidekiq but necessary for Sidekiq Pro.
  strategy = (@options[:fetch] || Sidekiq::BasicFetch)
  strategy.bulk_requeue([], @options)

  clear_heartbeat
end

#stopping? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sidekiq/launcher.rb', line 65

def stopping?
  @done
end

#to_data ⇒ Object 



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# File 'lib/sidekiq/launcher.rb', line 156

def to_data
  @data ||= begin
    {
      "hostname" => hostname,
      "started_at" => Time.now.to_f,
      "pid" => ::Process.pid,
      "tag" => @options[:tag] || "",
      "concurrency" => @options[:concurrency],
      "queues" => @options[:queues].uniq,
      "labels" => @options[:labels],
      "identity" => identity,
    }
  end
end

#to_json ⇒ Object 



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# File 'lib/sidekiq/launcher.rb', line 171

def to_json
  @json ||= begin
    # this data changes infrequently so dump it to a string
    # now so we don't need to dump it every heartbeat.
    Sidekiq.dump_json(to_data)
  end
end

#❤ ⇒ Object 



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# File 'lib/sidekiq/launcher.rb', line 99

def ❤
  key = identity
  fails = procd = 0

  begin
    fails = Processor::FAILURE.reset
    procd = Processor::PROCESSED.reset
    curstate = Processor::WORKER_STATE.dup

    workers_key = "#{key}:workers"
    nowdate = Time.now.utc.strftime("%Y-%m-%d")

    Sidekiq.redis do |conn|
      conn.multi do
        conn.incrby("stat:processed", procd)
        conn.incrby("stat:processed:#{nowdate}", procd)
        conn.expire("stat:processed:#{nowdate}", STATS_TTL)

        conn.incrby("stat:failed", fails)
        conn.incrby("stat:failed:#{nowdate}", fails)
        conn.expire("stat:failed:#{nowdate}", STATS_TTL)

        conn.del(workers_key)
        curstate.each_pair do |tid, hash|
          conn.hset(workers_key, tid, Sidekiq.dump_json(hash))
        end
        conn.expire(workers_key, 60)
      end
    end

    fails = procd = 0

    _, exists, _, _, msg = Sidekiq.redis { |conn|
      conn.multi {
        conn.sadd("processes", key)
        conn.exists(key)
        conn.hmset(key, "info", to_json, "busy", curstate.size, "beat", Time.now.to_f, "quiet", @done)
        conn.expire(key, 60)
        conn.rpop("#{key}-signals")
      }
    }

    # first heartbeat or recovering from an outage and need to reestablish our heartbeat
    fire_event(:heartbeat) unless exists

    return unless msg

    ::Process.kill(msg, ::Process.pid)
  rescue => e
    # ignore all redis/network issues
    logger.error("heartbeat: #{e.message}")
    # don't lose the counts if there was a network issue
    Processor::PROCESSED.incr(procd)
    Processor::FAILURE.incr(fails)
  end
end