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

Returns a new instance of Main.



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# File 'lib/asir/main.rb', line 27

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 



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# File 'lib/asir/main.rb', line 102

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.



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

def args
  @args
end

#env ⇒ Object

Returns the value of attribute env.



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

def env
  @env
end

#exit_code ⇒ Object

Returns the value of attribute exit_code.



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

def exit_code
  @exit_code
end

#force ⇒ Object

Options:



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

def force
  @force
end

#progname ⇒ Object

Returns the value of attribute progname.



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

def progname
  @progname
end

#transport ⇒ Object

Transport selected from asir.phase = :transport.



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

def transport
  @transport
end

Instance Method Details

#_create_transport(default_class) ⇒ Object 



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# File 'lib/asir/main.rb', line 275

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 



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# File 'lib/asir/main.rb', line 311

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 



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# File 'lib/asir/main.rb', line 86

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 



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# File 'lib/asir/main.rb', line 289

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 



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# File 'lib/asir/main.rb', line 185

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

#_start_worker!(type = adjective) ⇒ Object 



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# File 'lib/asir/main.rb', line 193

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 



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# File 'lib/asir/main.rb', line 325

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 



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

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

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



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# File 'lib/asir/main.rb', line 205

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 



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# File 'lib/asir/main.rb', line 252

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 



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# File 'lib/asir/main.rb', line 261

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 



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

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

#log_str_no_time ⇒ Object 



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

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

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



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# File 'lib/asir/main.rb', line 33

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

Returns:

  • (Boolean) 


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# File 'lib/asir/main.rb', line 358

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 



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# File 'lib/asir/main.rb', line 63

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 



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# File 'lib/asir/main.rb', line 223

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 



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

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

#start_beanstalk_conduit! ⇒ Object 



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

def start_beanstalk_conduit!
  _start_conduit!
end

#start_resque_conduit! ⇒ Object 



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

def start_resque_conduit!
  _start_conduit!
end

#stop_pid!(pid, msg = nil) ⇒ Object 



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# File 'lib/asir/main.rb', line 340

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 



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# File 'lib/asir/main.rb', line 131

def usage!
  $stderr.puts "SYNOPSIS:\nasir [ <<options>> ... ] <<verb>> <<adjective>> <<object>> [ <<identifier>> ]\n\nOPTIONS:\nconfig_rb=file.rb ($ASIR_LOG_DIR)\npid_dir=dir/      ($ASIR_PID_DIR)\nlog_dir=dir/      ($ASIR_LOG_DIR)\nverbose=[0-9]\n\nVERBS:\nstart\nstop\nrestart\nstatus\nlog\npid\nalive\n\nADJECTIVE-OBJECTs:\nbeanstalk conduit\nbeanstalk worker\nzmq worker\nwebrick worker\nresque conduit\nresque worker\n\nEXAMPLES:\n\nexport ASIR_CONFIG_RB=\"some_system/asir_config.rb\"\nasir start beanstalk conduit\nasir status beanstalk conduit\n\nasir start webrick worker\nasir pid   webrick worker\n\nasir start beanstalk worker 1\nasir start beanstalk worker 2\n\nasir start zmq worker\nasir start zmq worker 1\nasir start zmq worker 2\n"
end

#worker_pids ⇒ Object 



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

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