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.



6
7
8
9
 
# 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.



4
5
6
 
# File 'lib/scout_apm/instruments/moped.rb', line 4

def context
  @context
end

Instance Method Details

#install(prepend:) ⇒ Object 



19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
 
# File 'lib/scout_apm/instruments/moped.rb', line 19

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

    logger.info "Instrumenting Moped. Prepend: #{prepend}"

    if prepend
      ::Moped::Node.send(:include, ScoutApm::Tracer)
      ::Moped::Node.send(:prepend, MopedInstrumentationPrepend)
    else
      ::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
end

#installed? ⇒ Boolean

Returns:

  • (Boolean) 


15
16
17
 
# File 'lib/scout_apm/instruments/moped.rb', line 15

def installed?
  @installed
end

#logger ⇒ Object 



11
12
13
 
# File 'lib/scout_apm/instruments/moped.rb', line 11

def logger
  context.logger
end