Class: Pigeon::Launcher

Inherits:
Object
  • Object
show all
Defined in:
lib/pigeon/launcher.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(with_engine = Pigeon::Engine, logging: true) {|_self| ... } ⇒ Launcher

Instance Methods =====================================================

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/pigeon/launcher.rb', line 14

def initialize(with_engine = Pigeon::Engine, logging: true)
  @engine = with_engine
  @logging = !!logging
  
  yield(self) if (block_given?)
end

Class Method Details

.launch(engine = Pigeon::Engine, *arguments, logging: true) ⇒ Object

Class Methods ========================================================



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# File 'lib/pigeon/launcher.rb', line 6

def self.launch(engine = Pigeon::Engine, *arguments, logging: true)
  arguments = %w[ start ] if (arguments.empty?)
  
  new(engine, logging: logging).handle_args(*arguments)
end

Instance Method Details

#handle_args(*args) ⇒ Object 



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# File 'lib/pigeon/launcher.rb', line 21

def handle_args(*args)
  op = OptionParser.new do |parser|
    parser.on('-v', '--version') do
      pigeon_version = 'Pigeon %s' % Pigeon.version

      version =
        if (@engine.respond_to?(:version))
          '%s (%s)' % [ @engine.version, pigeon_version ]
        else
          pigeon_version
        end

      puts version
      exit(0)
    end
  end
  
  command = op.parse(*args.flatten).first

  begin
    case (command)
    when 'start'
      @engine.start do |pid, launched|
        yield(pid, launched) if (block_given?)
        self.start(pid, launched)
      end
    when 'stop'
      @engine.stop do |pid|
        yield(pid) if (block_given?)
        self.stop(pid)
      end
    when 'restart'
      @engine.restart do |pid, old_pid|
        yield(pid, old_pid) if (block_given?)
        self.restart(pid, old_pid)
      end
    when 'status'
      @engine.status do |pid|
        yield(pid) if (block_given?)
        self.status(pid)
      end
    when 'run'
      @engine.engine_logger = Pigeon::Logger.new(STDOUT)

      @engine.run do |pid|
        yield(pid) if (block_given?)
        self.run(pid)
      end
    else
      usage
    end

  rescue Interrupt
    exit(0)
  end
end

#log(message) ⇒ Object 



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# File 'lib/pigeon/launcher.rb', line 123

def log(message)
  if (@logging)
    puts(message)
  end
end

#restart(pid, old_pid) ⇒ Object 



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# File 'lib/pigeon/launcher.rb', line 107

def restart(pid, old_pid)
  if (old_pid)
    log "#{@engine.name} terminated. [%d]" % old_pid
  end

  log "#{@engine.name} now running. [%d]" % pid
end

#run(pid) ⇒ Object 



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# File 'lib/pigeon/launcher.rb', line 78

def run(pid)
  log "#{@engine.name} now running. [%d]" % pid
  log "Use ^C to terminate."
end

#shutdown(pid) ⇒ Object 



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# File 'lib/pigeon/launcher.rb', line 115

def shutdown(pid)
  log "Shutting down."
end

#start(pid, launched) ⇒ Object 



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# File 'lib/pigeon/launcher.rb', line 83

def start(pid, launched)
  if (launched)
    log "#{@engine.name} now running. [%d]" % pid
  else
    log "#{@engine.name} already running. [%d]" % pid
  end
end

#status(pid) ⇒ Object 



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# File 'lib/pigeon/launcher.rb', line 99

def status(pid)
  if (pid)
    log "#{@engine.name} running. [%d]" % pid
  else
    log "#{@engine.name} is not running."
  end
end

#stop(pid) ⇒ Object 



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# File 'lib/pigeon/launcher.rb', line 91

def stop(pid)
  if (pid)
    log "#{@engine.name} shut down. [%d]" % pid
  else
    log "#{@engine.name} was not running."
  end
end

#usage ⇒ Object 



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# File 'lib/pigeon/launcher.rb', line 119

def usage
  log "Usage: #{File.basename($0)} [start|stop|restart|status|run]"
end