Class: Daemonizer::Engine

Inherits:
Object
  • Object
show all
Defined in:
lib/daemonizer/engine.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config, debug = false) ⇒ Engine

Returns a new instance of Engine.



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# File 'lib/daemonizer/engine.rb', line 5

def initialize(config, debug = false)
  @config = config
  Daemonizer.logger_context = "#{Process.pid}/monitor"
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/daemonizer/engine.rb', line 3

def config
  @config
end

Instance Method Details

#debug! ⇒ Object 



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# File 'lib/daemonizer/engine.rb', line 59

def debug!
  Daemonizer.init_console_logger('console')
  @config.handler.logger = Daemonizer.logger
  
  init_block = Proc.new do
    begin
      @config.handler.worker_id = 1
      @config.handler.workers_count = 1
      run_callback :before_start, @config.pool, 1, 1
      @config.handler.start
    rescue Exception => e
      log_error(e)
    end
  end

  begin
    run_callback :before_prepare, @config.pool
    @config.handler.prepare(init_block) do
      run_callback :after_prepare, @config.pool
    end
  rescue Exception => e
    log_error(e)
  end
end

#log_error(e) ⇒ Object 



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# File 'lib/daemonizer/engine.rb', line 84

def log_error(e)
  Daemonizer.logger.fatal e.to_s
  Daemonizer.logger.fatal "#{e.class}: #{e}\n" + e.backtrace.join("\n")
end

#run_callback(callback, *args) ⇒ Object 



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# File 'lib/daemonizer/engine.rb', line 10

def run_callback(callback, *args)
  if callbacks = @config.callbacks[callback.to_sym] and callbacks.any?
    Daemonizer.logger.info "Running :#{callback} callbacks"
    callbacks.each do |callback|
      callback.call(*args)
    end
  end
end

#start! ⇒ Object 



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# File 'lib/daemonizer/engine.rb', line 19

def start!
  @pm = ProcessManager.new(@config)

  init_block = Proc.new do
    begin
      @pm.start_workers do |process_id|
        @config.handler.worker_id = process_id
        @config.handler.workers_count = @config.workers
        run_callback :before_start, @config.pool, process_id, @config.workers
        @config.handler.start
      end
    rescue Exception => e
      log_error(e)
    end
  end

  begin
    if @config.cow_friendly
      if GC.respond_to?(:copy_on_write_friendly=)
      	GC.copy_on_write_friendly = true
      	Daemonizer.logger.info "Enabling COW-friendly feature"
      else
      	Daemonizer.logger.info "COW-friendly feature is not supported by currently used ruby version"
      end
    end
    @config.handler.logger = Daemonizer.logger
    run_callback :before_prepare, @config.pool
    Daemonizer.logger.info "Workers count is #{config.workers}"
    @config.handler.prepare(init_block) do
      run_callback :after_prepare, @config.pool
    end
  rescue Exception => e
    log_error(e)
  end
  # Start monitoring loop
  
  setup_signals
  @pm.monitor_workers
end