Class: ASIR::Main

Inherits:
Object
  • Object
show all
Defined in:
lib/asir/main.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Main 



26
27
28
29
30
 
# File 'lib/asir/main.rb', line 26

def initialize
  self.env = ASIR::Environment.new
  self.progname = File.basename($0)
  self.exit_code = 0
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(sel, *args) ⇒ Object 



101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
 
# File 'lib/asir/main.rb', line 101

def method_missing sel, *args
  log "method_missing #{sel}" if verbose >= 3
  case sel.to_s
  when /^start_([^_]+)_worker!$/
    _start_worker!
  when /^status_([^_]+)_([^_]+)!$/
    pid = server_pid
    puts "#{log_str} pid #{pid}"
    system("ps -fw -p #{pid}")
  when /^log_([^_]+)_([^_]+)!$/
    puts log_file
  when /^taillog_([^_]+)_([^_]+)!$/
    exec "tail -f #{log_file.inspect}"
  when /^pid_([^_]+)_([^_]+)!$/
    pid = server_pid rescue nil
    alive = process_running? pid
    puts "#{pid_file} #{pid || :NA} #{alive}"
  when /^alive_([^_]+)_([^_]+)!$/
    pid = server_pid rescue nil
    alive = process_running? pid
    puts "#{pid_file} #{pid || :NA} #{alive}" if @verbose
    self.exit_code += 1 unless alive
  when /^stop_([^_]+)_([^_]+)!$/
    kill_server!
  else
    super
  end
end

Instance Attribute Details

#args ⇒ Object

Returns the value of attribute args.



7
8
9
 
# File 'lib/asir/main.rb', line 7

def args
  @args
end

#env ⇒ Object

Returns the value of attribute env.



7
8
9
 
# File 'lib/asir/main.rb', line 7

def env
  @env
end

#exit_code ⇒ Object

Returns the value of attribute exit_code.



7
8
9
 
# File 'lib/asir/main.rb', line 7

def exit_code
  @exit_code
end

#force ⇒ Object

Options:



21
22
23
 
# File 'lib/asir/main.rb', line 21

def force
  @force
end

#progname ⇒ Object

Returns the value of attribute progname.



19
20
21
 
# File 'lib/asir/main.rb', line 19

def progname
  @progname
end

#transport ⇒ Object

Transport selected from asir.phase = :transport.



24
25
26
 
# File 'lib/asir/main.rb', line 24

def transport
  @transport
end

Instance Method Details

#_create_transport(default_class) ⇒ Object 



274
275
276
277
278
279
280
281
282
 
# File 'lib/asir/main.rb', line 274

def _create_transport default_class
  config!(:environment)
  case transport = config!(:transport)
  when default_class
    self.transport = transport
  else
    raise "Expected config to return a #{default_class}, not a #{transport.class}"
  end
end

#_run_transport_server!(wid = 0) ⇒ Object 



310
311
312
313
314
315
316
317
318
319
320
321
322
 
# File 'lib/asir/main.rb', line 310

def _run_transport_server! wid = 0
  log "running transport worker #{transport.class} #{wid}"
  config!(:start)
  $0 += " #{wid} #{transport.uri rescue nil}"
  old_arg0 = $0.dup
  after_receive_message = transport.after_receive_message || lambda { | transport, message | nil }
  transport.after_receive_message = lambda do | transport, message |
    $0 = "#{old_arg0} #{transport.message_count} #{message.identifier}"
    after_receive_message.call(transport, message)
  end
  transport.run_server!
  self
end

#_run_verb! ⇒ Object 



85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
 
# File 'lib/asir/main.rb', line 85

def _run_verb!
  sel = :"#{verb}_#{adjective}_#{object}!"
  if verbose >= 3
    $stderr.puts "  verb      = #{verb.inspect}"
    $stderr.puts "  adjective = #{adjective.inspect}"
    $stderr.puts "  object    = #{object.inspect}"
    $stderr.puts "  sel       = #{sel.inspect}"
  end
  send(sel)
rescue ::Exception => exc
  $stderr.puts "#{log_str} ERROR\n#{exc.inspect}\n  #{exc.backtrace * "\n  "}"
  self.exit_code += 1
  raise
  nil
end

#_run_workers! ⇒ Object 



288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
 
# File 'lib/asir/main.rb', line 288

def _run_workers!
  $0 = "#{progname} #{adjective} #{object} #{identifier}"

  worker_id = 0
  transport.prepare_server!
  worker_processes = transport[:worker_processes] || 1
  (worker_processes - 1).times do
    wid = worker_id += 1
    pid = Process.fork do
      _run_transport_server! wid
    end
    Process.setgprp(pid, 0) rescue nil
    worker_pids[wid] = pid
    log "forked #{wid} pid #{pid}"
  end

  _run_transport_server!
ensure
  log "worker 0 stopped"
  _stop_workers!
end

#_start_conduit! ⇒ Object 



184
185
186
187
188
189
190
 
# File 'lib/asir/main.rb', line 184

def _start_conduit!
  config!(:environment)
  self.transport = config!(:transport)
  fork_server! do
    transport.start_conduit! :fork => false
  end
end

#_start_worker!(type = adjective) ⇒ Object 



192
193
194
195
196
197
198
199
200
201
202
 
# File 'lib/asir/main.rb', line 192

def _start_worker! type = adjective
  log "start_worker! #{type}"
  type = type.to_s
  fork_server! do
    transport_file = "asir/transport/#{type}"
    log "loading #{transport_file}"
    require transport_file
    _create_transport ASIR::Transport.const_get(type[0..0].upcase + type[1..-1])
    _run_workers!
  end
end

#_stop_workers! ⇒ Object 



324
325
326
327
328
329
330
331
332
333
334
335
336
337
 
# File 'lib/asir/main.rb', line 324

def _stop_workers!
  workers = worker_pids.dup
  worker_pids.clear
  workers.each do | wid, pid |
    config!(:stop)
    stop_pid! pid, "wid #{wid} "
  end
  workers.each do | wid, pid |
    wr = Process.waitpid(pid) rescue nil
    log "stopped #{wid} pid #{pid} => #{wr.inspect}", :stderr
  end
ensure
  worker_pids.clear
end

#config!(*args) ⇒ Object 



50
51
52
 
# File 'lib/asir/main.rb', line 50

def config! *args
  @env.config! *args
end

#fork_server!(cmd = nil, &blk) ⇒ Object 



204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
 
# File 'lib/asir/main.rb', line 204

def fork_server! cmd = nil, &blk
  pid = Process.fork do
    run_server! cmd, &blk
  end
  log "forked pid #{pid}"
  Process.detach(pid) # Forks a Thread?  We are gonna exit anyway.
  File.open(pid_file, "w+") { | o | o.puts pid }
  File.chmod(0666, pid_file) rescue nil

  # Wait and check if process still exists.
  sleep 3
  unless process_running? pid
    raise "Server process #{pid} died to soon?"
  end

  self
end

#kill_server! ⇒ Object 



251
252
253
254
255
256
257
258
 
# File 'lib/asir/main.rb', line 251

def kill_server!
  log "#{log_str} kill"
  pid = server_pid
  stop_pid! pid
rescue ::Exception => exc
  log "#{log_str} ERROR\n#{exc.inspect}\n  #{exc.backtrace * "\n  "}", :stderr
  raise
end

#log(msg, to_stderr = false) ⇒ Object 



260
261
262
263
264
265
266
267
 
# File 'lib/asir/main.rb', line 260

def log msg, to_stderr = false
  if to_stderr
    $stderr.puts "#{log_str_no_time} #{msg}"
  end
  File.open(log_file, "a+") do | log |
    log.puts "#{log_str} #{msg}"
  end
end

#log_str ⇒ Object 



54
55
56
 
# File 'lib/asir/main.rb', line 54

def log_str
  "#{Time.now.gmtime.iso8601(4)} #{$$} #{log_str_no_time}"
end

#log_str_no_time ⇒ Object 



58
59
60
 
# File 'lib/asir/main.rb', line 58

def log_str_no_time
  "#{progname} #{verb} #{adjective} #{object} #{identifier}"
end

#parse_args!(args = ARGV.dup) ⇒ Object 



32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
 
# File 'lib/asir/main.rb', line 32

def parse_args! args = ARGV.dup
  self.args = args
  until args.empty?
    case args.first
    when /^([a-z0-9_]+=)(.*)/i
      k, v = $1.to_sym, $2
      args.shift
      v = v.to_i if v == v.to_i.to_s
      send(k, v)
    else
      break
    end
  end
  self.verb, self.adjective, self.object, self.identifier = args.map{|x| x.to_sym}
  self.identifier ||= :'0'
  self
end

#process_running?(pid) ⇒ Boolean 



357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
 
# File 'lib/asir/main.rb', line 357

def process_running? pid
  case pid
  when false, nil
    pid
  when Integer
    Process.kill(0, pid)
  else
    raise TypeError, "expected false, nil, Integer; given #{pid.inspect}"
  end
  true
rescue ::Errno::ESRCH
  false
rescue ::Exception => exc
  $stderr.puts "  DEBUG: process_running? #{pid} => #{exc.inspect}"
  false
end

#run! ⇒ Object 



62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
 
# File 'lib/asir/main.rb', line 62

def run!
  unless verb && adjective && object
    self.exit_code = 1
    return usage!
  end
  config!(:configure)
  # $stderr.puts "log_file = #{log_file.inspect}"
  case self.verb
  when :restart
    self.verb = :stop
    _run_verb! && sleep(1)
    self.verb = :start
    _run_verb!
  else
    _run_verb!
  end
  self
rescue ::Exception => exc
  $stderr.puts "#{log_str} ERROR\n#{exc.inspect}\n  #{exc.backtrace * "\n  "}"
  self.exit_code += 1
  self
end

#run_server!(cmd = nil) ⇒ Object 



222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
 
# File 'lib/asir/main.rb', line 222

def run_server! cmd = nil
  lf = File.open(log_file, "a+")
  File.chmod(0666, log_file) rescue nil
  $stdin.close rescue nil
  STDIN.close rescue nil
  STDOUT.reopen(lf)
  $stdout.reopen(lf) if $stdout.object_id != STDOUT.object_id
  STDERR.reopen(lf)
  $stderr.reopen(lf) if $stderr.object_id != STDERR.object_id
  # Process.daemon rescue nil # Ruby 1.9.x only.
  lf.puts "#{log_str} starting pid #{$$}"
  begin
    if cmd
      exec(cmd)
    else
      yield
    end
  ensure
    lf.puts "#{log_str} finished pid #{$$}"
    File.unlink(pid_file) rescue nil
  end
  self
rescue ::Exception => exc
  msg = "ERROR pid #{$$}\n#{exc.inspect}\n  #{exc.backtrace * "\n  "}"
  log msg, :stderr
  raise
  self
end

#server_pid ⇒ Object 



269
270
271
272
 
# File 'lib/asir/main.rb', line 269

def server_pid
  pid = File.read(pid_file).chomp!
  pid.to_i
end

#start_beanstalk_conduit! ⇒ Object 



176
177
178
 
# File 'lib/asir/main.rb', line 176

def start_beanstalk_conduit!
  _start_conduit!
end

#start_resque_conduit! ⇒ Object 



180
181
182
 
# File 'lib/asir/main.rb', line 180

def start_resque_conduit!
  _start_conduit!
end

#stop_pid!(pid, msg = nil) ⇒ Object 



339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
 
# File 'lib/asir/main.rb', line 339

def stop_pid! pid, msg = nil
  log "stopping #{msg}pid #{pid}", :stderr
  if process_running? pid
    log "TERM pid #{pid}"
    Process.kill('TERM', pid) rescue nil
    sleep 3
    if force or process_running? pid
      log "KILL pid #{pid}", :stderr
      Process.kill('KILL', pid) rescue nil
    end
    if process_running? pid
      log "cant-stop pid #{pid}", :stderr
    end
  else
    log "not-running? pid #{pid}", :stderr
  end
end

#usage! ⇒ Object 



130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
 
# File 'lib/asir/main.rb', line 130

def usage!
  $stderr.puts <<"END"
SYNOPSIS:
asir [ <<options>> ... ] <<verb>> <<adjective>> <<object>> [ <<identifier>> ]

OPTIONS:
config_rb=file.rb ($ASIR_LOG_DIR)
pid_dir=dir/      ($ASIR_PID_DIR)
log_dir=dir/      ($ASIR_LOG_DIR)
verbose=[0-9]

VERBS:
start
stop
restart
status
log
pid
alive

ADJECTIVE-OBJECTs:
beanstalk conduit
beanstalk worker
zmq worker
webrick worker
resque conduit
resque worker

EXAMPLES:

export ASIR_CONFIG_RB="some_system/asir_config.rb"
asir start beanstalk conduit
asir status beanstalk conduit

asir start webrick worker
asir pid   webrick worker

asir start beanstalk worker 1
asir start beanstalk worker 2

asir start zmq worker
asir start zmq worker 1
asir start zmq worker 2
END
end

#worker_pids ⇒ Object 



284
285
286
 
# File 'lib/asir/main.rb', line 284

def worker_pids
  (@worker_pids ||= { })[adjective] ||= { }
end