Class: Workhorse::Daemon::ShellHandler

Inherits:
Object
  • Object
show all
Defined in:
lib/workhorse/daemon/shell_handler.rb

Class Method Summary collapse

Class Method Details

.run(options = {}, &block) ⇒ Object 



3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/workhorse/daemon/shell_handler.rb', line 3

def self.run(options = {}, &block)
  unless ARGV.count == 1
    usage
    exit 99
  end

  lockfile_path = options.delete(:lockfile) || 'workhorse.lock'
  lockfile = File.open(lockfile_path, 'a')
  lockfile.flock(File::LOCK_EX || File::LOCK_NB)

  daemon = Workhorse::Daemon.new(options, &block)

  begin
    case ARGV.first
    when 'start'
      exit daemon.start
    when 'stop'
      exit daemon.stop
    when 'kill'
      exit daemon.stop(true)
    when 'status'
      exit daemon.status
    when 'watch'
      exit daemon.watch
    when 'restart'
      exit daemon.restart
    when 'usage'
      usage
      exit 99
    else
      usage
    end

    exit 0
  rescue => e
    warn "#{e.message}\n#{e.backtrace.join("\n")}"
    exit 99
  ensure
    lockfile.flock(File::LOCK_UN)
  end
end

.usage ⇒ Object 



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
 
# File 'lib/workhorse/daemon/shell_handler.rb', line 45

def self.usage
  warn "Usage: \#{$PROGRAM_NAME} start|stop|status|watch|restart|usage\n\nOptions:\n\n  start\nStart the daemon\n\n  stop\nStop the daemon\n\n  kill\nKill the daemon\n\n  status\nQuery the status of the daemon. Exit with status 1 if any worker is\nnot running.\n\n  watch\nChecks the status (running or stopped) and whether it is as\nexpected. Starts the daemon if it is expected to run but is not.\n\n  restart\nShortcut for consecutive 'stop' and 'start'.\n\n  usage\nShow this message\n\nExit status:\n 0  if OK,\n 1  if at least one worker has an unexpected status,\n 99 on all other errors.\n"
end