How do I access Sinatra's Logger outside the Request Scope

Question

It seems that Sinatra\'s logger is only available inside request handlers (See https://github.com/sinatra/sinatra#logging), but what if I want to use a logger in other places, f

Answer 1

The accepted answer didn't quite work for me, so I came up with the following:

class AppLogger
  extend SingleForwardable

  def_delegators :logger, :info, :error, :warn, :level

  class << self
    def logger
      return @_logger if @_logger

      @_logger = Logger.new STDOUT
      @_logger.level = Logger::INFO
    end

    def suppress_logging
      logger.level = Logger::FATAL
    end
  end
end

suppress_logging is useful for keeping specs quiet.

In the app init:

set :logging, AppLogger.logger

From a request:

logger.info "Can't touch this."

From a class that does not have access to the logger:

AppLogger.info "You've got mail."

And, RSpec mock:

let( :logger ){ double 'logger' }

before do
  allow( AppLogger ).to receive( :logger ).and_return logger
  allow( logger ).to receive :error
end

specify 'logs error' do
  post '/raise/error'

  expect( logger ).to have_received( :error ).with 'An error has occured.'
end