Class: God::CLI::Run

Inherits:
Object
  • Object
show all
Defined in:
lib/god/cli/run.rb

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Run

Returns a new instance of Run.



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# File 'lib/god/cli/run.rb', line 6

def initialize(options)
  @options = options

  dispatch
end

Instance Method Details

#attach ⇒ Object 



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# File 'lib/god/cli/run.rb', line 26

def attach
  process = System::Process.new(@options[:attach])
  Thread.new do
    loop do
      unless process.exists?
        applog(nil, :info, "Going down because attached process #{@options[:attach]} exited")
        exit!
      end
      sleep 5
    end
  end
end

#default_run ⇒ Object 



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# File 'lib/god/cli/run.rb', line 39

def default_run
  # make sure we have STDIN/STDOUT redirected immediately
  setup_logging

  # start attached pid watcher if necessary
  attach if @options[:attach]

  God.port = @options[:port] if @options[:port]

  God::EventHandler.load if @options[:events]

  # set log level, defaults to WARN
  God.log_level = if @options[:log_level]
                    @options[:log_level]
                  else
                    @options[:daemonize] ? :warn : :info
                  end

  if @options[:config]
    abort "File not found: #{@options[:config]}" if !@options[:config].include?('*') && !File.exist?(@options[:config])

    # start the event handler
    God::EventHandler.start if God::EventHandler.loaded?

    load_config @options[:config]
  end
  setup_logging
end

#dispatch ⇒ Object 



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# File 'lib/god/cli/run.rb', line 12

def dispatch
  # have at_exit start god
  $run = true

  require 'god/sys_logger' if @options[:syslog]

  # run
  if @options[:daemonize]
    run_daemonized
  else
    run_in_front
  end
end

#load_config(config) ⇒ Object 



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# File 'lib/god/cli/run.rb', line 126

def load_config(config)
  files = File.directory?(config) ? Dir['**/*.god'] : Dir[config]
  abort 'No files could be found' if files.empty?
  files.each do |god_file|
    abort "File '#{god_file}' could not be loaded" unless load_god_file(god_file)
  end
end

#load_god_file(god_file) ⇒ Object 



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# File 'lib/god/cli/run.rb', line 134

def load_god_file(god_file)
  applog(nil, :info, "Loading #{god_file}")
  load File.expand_path(god_file)
  true
rescue Exception => e
  raise if e.instance_of?(SystemExit)

  puts "There was an error in #{god_file}"
  puts "\t#{e.message}"
  puts "\t#{e.backtrace.join("\n\t")}"
  false
end

#run_daemonized ⇒ Object 



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# File 'lib/god/cli/run.rb', line 74

def run_daemonized
  # trap and ignore SIGHUP
  Signal.trap('HUP') {} # block must be passed
  # trap and log-reopen SIGUSR1
  Signal.trap('USR1') { setup_logging }

  pid = fork do
    require 'god'

    # set pid if requested
    God.pid = @options[:pid] if @options[:pid] # and as daemon

    default_run

    unless God::EventHandler.loaded?
      puts
      puts '***********************************************************************'
      puts '*'
      puts '* Event conditions are not available for your installation of god.'
      puts '* You may still use and write custom conditions using the poll system'
      puts '*'
      puts '***********************************************************************'
      puts
    end
  rescue => e
    puts e.message
    puts e.backtrace.join("\n")
    abort 'There was a fatal system error while starting god (see above)'
  end

  File.write(@options[:pid], pid) if @options[:pid]

  ::Process.detach pid

  exit
end

#run_in_front ⇒ Object 



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# File 'lib/god/cli/run.rb', line 68

def run_in_front
  require 'god'

  default_run
end

#setup_logging ⇒ Object 



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# File 'lib/god/cli/run.rb', line 111

def setup_logging
  log_file = God.log_file
  log_file = File.expand_path(@options[:log]) if @options[:log]
  log_file = '/dev/null' if !log_file && @options[:daemonize]
  return unless log_file

  puts "Sending output to log file: #{log_file}" unless @options[:daemonize]

  # reset file descriptors
  $stdin.reopen '/dev/null'
  $stdout.reopen(log_file, 'a')
  $stderr.reopen $stdout
  $stdout.sync = true
end