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

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.


17
18
19
20
21
22
# File 'lib/sidekiq/launcher.rb', line 17

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

Instance Attribute Details

#fetcherObject

Returns the value of attribute fetcher


15
16
17
# File 'lib/sidekiq/launcher.rb', line 15

def fetcher
  @fetcher
end

#managerObject

Returns the value of attribute manager


15
16
17
# File 'lib/sidekiq/launcher.rb', line 15

def manager
  @manager
end

#pollerObject

Returns the value of attribute poller


15
16
17
# File 'lib/sidekiq/launcher.rb', line 15

def poller
  @poller
end

Instance Method Details

#clear_heartbeatObject


152
153
154
155
156
157
158
159
160
161
162
163
164
# File 'lib/sidekiq/launcher.rb', line 152

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

#heartbeatObject


64
65
66
67
68
69
70
# File 'lib/sidekiq/launcher.rb', line 64

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

  
end

#quietObject

Stops this instance from processing any more jobs,


32
33
34
35
36
# File 'lib/sidekiq/launcher.rb', line 32

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

#runObject


24
25
26
27
28
# File 'lib/sidekiq/launcher.rb', line 24

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

#start_heartbeatObject


121
122
123
124
125
126
127
# File 'lib/sidekiq/launcher.rb', line 121

def start_heartbeat
  while true
    heartbeat
    sleep 5
  end
  Sidekiq.logger.info("Heartbeat stopping...")
end

#stopObject

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.


41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
# File 'lib/sidekiq/launcher.rb', line 41

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)

58
59
60
# File 'lib/sidekiq/launcher.rb', line 58

def stopping?
  @done
end

#to_dataObject


129
130
131
132
133
134
135
136
137
138
139
140
141
142
# File 'lib/sidekiq/launcher.rb', line 129

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

#to_jsonObject


144
145
146
147
148
149
150
# File 'lib/sidekiq/launcher.rb', line 144

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


72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
# File 'lib/sidekiq/launcher.rb', line 72

def 
  key = identity
  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.multi 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
        conn.expire(workers_key, 60)
      end
    end
    fails = procd = 0

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

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

    return unless msg

    ::Process.kill(msg, $$)
  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