Class: Sidekiq::Launcher

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

Overview

The Launcher is a very simple Actor whose job is to start, monitor and stop the core Actors in Sidekiq. If any of these actors die, the Sidekiq process exits immediately.

Constant Summary collapse

JVM_RESERVED_SIGNALS =

Don’t Process#kill if we get these signals via the API

['USR1', 'USR2']

Constants included from Util

Util::EXPIRY

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Util

#fire_event, #hostname, #identity, #logger, #process_nonce, #redis, #safe_thread, #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 16

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 14

def fetcher
  @fetcher
end

#manager ⇒ Object

Returns the value of attribute manager.



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# File 'lib/sidekiq/launcher.rb', line 14

def manager
  @manager
end

#poller ⇒ Object

Returns the value of attribute poller.



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# File 'lib/sidekiq/launcher.rb', line 14

def poller
  @poller
end

Instance Method Details

#clear_heartbeat ⇒ Object 



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# File 'lib/sidekiq/launcher.rb', line 143

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(k, data, json) ⇒ Object 



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

def heartbeat(k, data, json)
  results = Sidekiq::CLI::PROCTITLES.map {|x| x.(self, data) }
  results.compact!
  $0 = results.join(' ')

  ❤(k, json)
end

#quiet ⇒ Object

Stops this instance from processing any more jobs,



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

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

#run ⇒ Object 



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# File 'lib/sidekiq/launcher.rb', line 23

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 120

def start_heartbeat
  k = identity
  data = {
    'hostname' => hostname,
    'started_at' => Time.now.to_f,
    'pid' => $$,
    'tag' => @options[:tag] || '',
    'concurrency' => @options[:concurrency],
    'queues' => @options[:queues].uniq,
    'labels' => @options[:labels],
    'identity' => k,
  }
  # this data doesn't change so dump it to a string
  # now so we don't need to dump it every heartbeat.
  json = Sidekiq.dump_json(data)

  while true
    heartbeat(k, data, json)
    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 40

def stop
  deadline = Time.now + @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 57

def stopping?
  @done
end

#❤(key, json) ⇒ Object 



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# File 'lib/sidekiq/launcher.rb', line 73

def ❤(key, json)
  fails = procd = 0
  begin
    Processor::FAILURE.update {|curr| fails = curr; 0 }
    Processor::PROCESSED.update {|curr| procd = curr; 0 }

    workers_key = "#{key}:workers".freeze
    nowdate = Time.now.utc.strftime("%Y-%m-%d".freeze)
    Sidekiq.redis do |conn|
      conn.pipelined do
        conn.incrby("stat:processed".freeze, procd)
        conn.incrby("stat:processed:#{nowdate}", procd)
        conn.incrby("stat:failed".freeze, fails)
        conn.incrby("stat:failed:#{nowdate}", fails)
        conn.del(workers_key)
        Processor::WORKER_STATE.each_pair do |tid, hash|
          conn.hset(workers_key, tid, Sidekiq.dump_json(hash))
        end
      end
    end
    fails = procd = 0

    _, _, _, msg = Sidekiq.redis do |conn|
      conn.pipelined do
        conn.sadd('processes', key)
        conn.hmset(key, 'info', json, 'busy', Processor::WORKER_STATE.size, 'beat', Time.now.to_f, 'quiet', @done)
        conn.expire(key, 60)
        conn.rpop("#{key}-signals")
      end
    end

    return unless msg

    if JVM_RESERVED_SIGNALS.include?(msg)
      Sidekiq::CLI.instance.handle_signal(msg)
    else
      ::Process.kill(msg, $$)
    end
  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.increment(procd)
    Processor::FAILURE.increment(fails)
  end
end