Class: Middleware::Logger

Inherits:
Object
  • Object
show all
Defined in:
lib/middleware/logger.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, logger, name = nil) ⇒ Logger

Returns a new instance of Logger.



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# File 'lib/middleware/logger.rb', line 7

def initialize app, logger, name = nil
  @app = app
  @write_to = logger
  @middleware_name = name
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/middleware/logger.rb', line 13

def call env
  write(
      way_in_message(
          next_middleware_name, env
  ))

  time = Time.now

  @app.call(env).tap { |env|
    write(
        way_out_message(
            next_middleware_name, (Time.now - time) * 1000.0, env
    ))
  }
end

#next_middleware_name ⇒ Object 



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# File 'lib/middleware/logger.rb', line 29

def next_middleware_name
  @app.class.name
end

#pretty_print(item) ⇒ Object 



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# File 'lib/middleware/logger.rb', line 33

def pretty_print item
  ->(out){ PP.pp(item, out) }.('')
end

#way_in_message(name, env) ⇒ Object 



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# File 'lib/middleware/logger.rb', line 37

def way_in_message name, env
  ' %s has been called with: %s' % [name, pretty_print(env)]
end

#way_out_message(name, time, value) ⇒ Object 



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# File 'lib/middleware/logger.rb', line 41

def way_out_message name, time, value
  ' %s finished in %.0f ms and returned: %s' % [name, time, pretty_print(value)]
end

#write(msg) ⇒ Object 



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# File 'lib/middleware/logger.rb', line 45

def write msg
  @write_to.add(::Logger::INFO, msg.slice(0, 255).strip!, @middleware_name)
end