Class: Sidekiq::CLI

Inherits:
Object
  • Object
show all
Includes:
Util, Singleton
Defined in:
lib/sidekiq/cli.rb

Constant Summary collapse

SIGNAL_HANDLERS = 
{
  # Ctrl-C in terminal
  "INT" => ->(cli) { raise Interrupt },
  # TERM is the signal that Sidekiq must exit.
  # Heroku sends TERM and then waits 30 seconds for process to exit.
  "TERM" => ->(cli) { raise Interrupt },
  "TSTP" => ->(cli) {
    Sidekiq.logger.info "Received TSTP, no longer accepting new work"
    cli.launcher.quiet
  },
  "TTIN" => ->(cli) {
    Thread.list.each do |thread|
      Sidekiq.logger.warn "Thread TID-#{(thread.object_id ^ ::Process.pid).to_s(36)} #{thread.name}"
      if thread.backtrace
        Sidekiq.logger.warn thread.backtrace.join("\n")
      else
        Sidekiq.logger.warn "<no backtrace available>"
      end
    end
  }
}
UNHANDLED_SIGNAL_HANDLER = 
->(cli) { Sidekiq.logger.info "No signal handler registered, ignoring" }

Constants included from Util

Util::PAUSE_TIME

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Util

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

Methods included from ExceptionHandler

#handle_exception

Instance Attribute Details

#environment ⇒ Object

Returns the value of attribute environment.



21
22
23
 
# File 'lib/sidekiq/cli.rb', line 21

def environment
  @environment
end

#launcher ⇒ Object

Returns the value of attribute launcher.



20
21
22
 
# File 'lib/sidekiq/cli.rb', line 20

def launcher
  @launcher
end

Class Method Details

.b ⇒ Object 



144
145
146
 
# File 'lib/sidekiq/cli.rb', line 144

def self.b
  "\e[30m"
end



152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
 
# File 'lib/sidekiq/cli.rb', line 152

def self.banner
  %{
  #{w}         m,
  #{w}         `$b
  #{w}    .ss,  $$:         .,d$
  #{w}    `$$P,d$P'    .,md$P"'
  #{w}     ,$$$$$b#{b}/#{w}md$$$P^'
  #{w}   .d$$$$$$#{b}/#{w}$$$P'
  #{w}   $$^' `"#{b}/#{w}$$$'       #{r}____  _     _      _    _
  #{w}   $:     ,$$:      #{r} / ___|(_) __| | ___| | _(_) __ _
  #{w}   `b     :$$       #{r} \\___ \\| |/ _` |/ _ \\ |/ / |/ _` |
  #{w}          $$:        #{r} ___) | | (_| |  __/   <| | (_| |
  #{w}          $$         #{r}|____/|_|\\__,_|\\___|_|\\_\\_|\\__, |
  #{w}        .d$$          #{r}                             |_|
  #{reset}}
end

.r ⇒ Object 



140
141
142
 
# File 'lib/sidekiq/cli.rb', line 140

def self.r
  "\e[31m"
end

.reset ⇒ Object 



148
149
150
 
# File 'lib/sidekiq/cli.rb', line 148

def self.reset
  "\e[0m"
end

.w ⇒ Object 



136
137
138
 
# File 'lib/sidekiq/cli.rb', line 136

def self.w
  "\e[37m"
end

Instance Method Details

#handle_signal(sig) ⇒ Object 



193
194
195
196
 
# File 'lib/sidekiq/cli.rb', line 193

def handle_signal(sig)
  Sidekiq.logger.debug "Got #{sig} signal"
  SIGNAL_HANDLERS[sig].call(self)
end

#jruby? ⇒ Boolean

Returns:

  • (Boolean) 


29
30
31
 
# File 'lib/sidekiq/cli.rb', line 29

def jruby?
  defined?(::JRUBY_VERSION)
end

#launch(self_read) ⇒ Object 



108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
 
# File 'lib/sidekiq/cli.rb', line 108

def launch(self_read)
  if environment == "development" && $stdout.tty?
    logger.info "Starting processing, hit Ctrl-C to stop"
  end

  @launcher = Sidekiq::Launcher.new(options)

  begin
    launcher.run

    while (readable_io = IO.select([self_read]))
      signal = readable_io.first[0].gets.strip
      handle_signal(signal)
    end
  rescue Interrupt
    logger.info "Shutting down"
    launcher.stop
    logger.info "Bye!"

    # Explicitly exit so busy Processor threads won't block process shutdown.
    #
    # NB: slow at_exit handlers will prevent a timely exit if they take
    # a while to run. If Sidekiq is getting here but the process isn't exiting,
    # use the TTIN signal to determine where things are stuck.
    exit(0)
  end
end

#parse(args = ARGV) ⇒ Object 



23
24
25
26
27
 
# File 'lib/sidekiq/cli.rb', line 23

def parse(args = ARGV)
  setup_options(args)
  initialize_logger
  validate!
end

#run(boot_app: true) ⇒ Object

Code within this method is not tested because it alters global process state irreversibly. PRs which improve the test coverage of Sidekiq::CLI are welcomed.



36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
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
 
# File 'lib/sidekiq/cli.rb', line 36

def run(boot_app: true)
  boot_application if boot_app

  if environment == "development" && $stdout.tty? && Sidekiq.log_formatter.is_a?(Sidekiq::Logger::Formatters::Pretty)
    print_banner
  end
  logger.info "Booted Rails #{::Rails.version} application in #{environment} environment" if rails_app?

  self_read, self_write = IO.pipe
  sigs = %w[INT TERM TTIN TSTP]
  # USR1 and USR2 don't work on the JVM
  sigs << "USR2" if Sidekiq.pro? && !jruby?
  sigs.each do |sig|
    old_handler = Signal.trap(sig) do
      if old_handler.respond_to?(:call)
        begin
          old_handler.call
        rescue Exception => exc
          # signal handlers can't use Logger so puts only
          puts ["Error in #{sig} handler", exc].inspect
        end
      end
      self_write.puts(sig)
    end
  rescue ArgumentError
    puts "Signal #{sig} not supported"
  end

  logger.info "Running in #{RUBY_DESCRIPTION}"
  logger.info Sidekiq::LICENSE
  logger.info "Upgrade to Sidekiq Pro for more features and support: https://sidekiq.org" unless defined?(::Sidekiq::Pro)

  # touch the connection pool so it is created before we
  # fire startup and start multithreading.
  info = Sidekiq.redis_info
  ver = info["redis_version"]
  raise "You are connecting to Redis v#{ver}, Sidekiq requires Redis v4.0.0 or greater" if ver < "4"

  maxmemory_policy = info["maxmemory_policy"]
  if maxmemory_policy != "noeviction"
    logger.warn "\n\n      WARNING: Your Redis instance will evict Sidekiq data under heavy load.\n      The 'noeviction' maxmemory policy is recommended (current policy: '\#{maxmemory_policy}').\n      See: https://github.com/mperham/sidekiq/wiki/Using-Redis#memory\n\n    EOM\n  end\n\n  # Since the user can pass us a connection pool explicitly in the initializer, we\n  # need to verify the size is large enough or else Sidekiq's performance is dramatically slowed.\n  cursize = Sidekiq.redis_pool.size\n  needed = Sidekiq.options[:concurrency] + 2\n  raise \"Your pool of \#{cursize} Redis connections is too small, please increase the size to at least \#{needed}\" if cursize < needed\n\n  # cache process identity\n  Sidekiq.options[:identity] = identity\n\n  # Touch middleware so it isn't lazy loaded by multiple threads, #3043\n  Sidekiq.server_middleware\n\n  # Before this point, the process is initializing with just the main thread.\n  # Starting here the process will now have multiple threads running.\n  fire_event(:startup, reverse: false, reraise: true)\n\n  logger.debug { \"Client Middleware: \#{Sidekiq.client_middleware.map(&:klass).join(\", \")}\" }\n  logger.debug { \"Server Middleware: \#{Sidekiq.server_middleware.map(&:klass).join(\", \")}\" }\n\n  launch(self_read)\nend\n"