Class: Wildcloud::Runner::Runner

Inherits:
Object
  • Object
show all
Includes:
Singleton, RubyTemplate, Tools
Defined in:
lib/wildcloud/runner/runner.rb,
lib/wildcloud/runner/template/ruby.rb

Instance Method Summary collapse

Methods included from RubyTemplate

#ruby_use

Methods included from Tools

#logger, #run

Constructor Details

#initialize ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/wildcloud/runner/runner.rb', line 28

def initialize

  $0 = "Wildcloud::Runner"

  logger.info('Runner', 'Changing to application directory')
  Dir.chdir('/home/wildcloud')

  logger.info('Runner', 'Loading Cloudfile')
  @cloudfile = YAML.load_file('Cloudfile') if File.exists?('Cloudfile')
  @cloudfile ||= {}
  @cloudfile['templates'] ||= @cloudfile['modules']

  if @cloudfile['templates'].kind_of?(Hash)
    @cloudfile['templates'].each do |name, config|
      config ||= {}
      template = File.expand_path("../template/#{name}.rb", __FILE__)
      if File.exists?(template)
        logger.info('Runner', "Running template: #{name}")
        require template
        send("#{name}_run".to_sym, config)
      else
        logger.info('Runner', "Unavailable template: #{name}")
      end
    end
  end

  @processes = {}
  @commands = YAML.load_file('Procfile')
  @commands.each do |name, command|
    start_process(name, command)
  end

end

Instance Method Details

#ruby_run(config) ⇒ Object 



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# File 'lib/wildcloud/runner/template/ruby.rb', line 59

def ruby_run(config)
  ruby_use(config)
end

#start_process(name, command) ⇒ Object 



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# File 'lib/wildcloud/runner/runner.rb', line 62

def start_process(name, command)
  prc = @processes[name] = {}

  prc[:name] = name
  prc[:command] = command

  prc[:input], prc[:output] = IO.pipe

  logger.info(name, "Starting #{command}")

  prc[:pid] = fork do

    $0 = "Process: #{name}"

    $stdout.reopen(prc[:output])
    $stderr = $stdout

    prc[:input].close

    stdout, stdin, pid = PTY.spawn(command)

    while line = stdout.readline
      $stdout << line
    end

    Process.wait(pid)

  end

  logger.info(name, "Process started with PID #{prc[:pid]}.")

  prc[:output].close

  logger.info(name, "Starting control thread.")

  prc[:collector] = Thread.new do
    Process.wait(prc[:pid])
    logger.info(name, "Process waiting 10s to restart.")
    sleep(10)
    start_process(name, command)
  end

  logger.info(name, "Starting reading thread.")

  prc[:reader] = Thread.new do
    logger.info(name, "Waiting for data.")
    until prc[:input].eof?
      begin
        logger.info(name, prc[:input].gets.chomp)
      rescue Exception => e
        logger.info(name, "Exception #{e.message}")
      end
    end
    logger.info(name, "Pipe closed.")
  end

rescue Exception => e
  logger.info(name, "Exception #{e.message}")
end