Class: ScoutApm::Instruments::Moped

Inherits:
Object
  • Object
show all
Defined in:
lib/scout_apm/instruments/moped.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(context) ⇒ Moped

Returns a new instance of Moped.



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# File 'lib/scout_apm/instruments/moped.rb', line 6

def initialize(context)
  @context = context
  @installed = false
end

Instance Attribute Details

#context ⇒ Object (readonly)

Returns the value of attribute context.



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# File 'lib/scout_apm/instruments/moped.rb', line 4

def context
  @context
end

Instance Method Details

#install ⇒ Object 



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# File 'lib/scout_apm/instruments/moped.rb', line 19

def install
  if defined?(::Moped)
    @installed = true

    logger.info "Instrumenting Moped"

    ::Moped::Node.class_eval do
      include ScoutApm::Tracer

      def process_with_scout_instruments(operation, &callback)
        if operation.respond_to?(:collection)
          collection = operation.collection
          name = "Process/#{collection}/#{operation.class.to_s.split('::').last}"
          self.class.instrument("MongoDB", name, :annotate_layer => { :query => scout_sanitize_log(operation.log_inspect) }) do
            process_without_scout_instruments(operation, &callback)
          end
        end
      end
      alias_method :process_without_scout_instruments, :process
      alias_method :process, :process_with_scout_instruments

      # replaces values w/ ?
      def scout_sanitize_log(log)
        return nil if log.length > 1000 # safeguard - don't sanitize large SQL statements
        log.gsub(/(=>")((?:[^"]|"")*)"/) do
          $1 + '?' + '"'
        end
      end
    end
  end
end

#installed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/scout_apm/instruments/moped.rb', line 15

def installed?
  @installed
end

#logger ⇒ Object 



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# File 'lib/scout_apm/instruments/moped.rb', line 11

def logger
  context.logger
end