Class: Mysql2::Metrics

Inherits:
Object
  • Object
show all
Defined in:
lib/mysql2/metrics.rb,
lib/mysql2/metrics/ltsv_formatter.rb

Defined Under Namespace

Classes: LtsvFormatter

Class Method Summary collapse

Class Method Details

.add_tracer(method) ⇒ Object 



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# File 'lib/mysql2/metrics.rb', line 17

def self.add_tracer(method)
  klass = ::Mysql2::Client
  unless klass.method_defined?("#{method}_without_metrics")
    klass.__send__(:alias_method, "#{method}_without_metrics", method)
    klass.__send__(:define_method, "#{method}_with_metrics") do |*args|
      query = args.first
      ::Mysql2::Metrics.measure_time(query) do
        send("#{method}_without_metrics", *args)
      end
    end
    klass.__send__(:alias_method, method, "#{method}_with_metrics")
  end
end

.logger ⇒ Object 



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# File 'lib/mysql2/metrics.rb', line 11

def self.logger
  @logger ||= Logger.new($stdout).tap {|log|
    log.formatter = ::Mysql2::Metrics::LtsvFormatter.new
  }
end

.logger=(logger) ⇒ Object 



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# File 'lib/mysql2/metrics.rb', line 7

def self.logger=(logger)
  @logger = logger
end

.measure_time(query, &block) ⇒ Object 



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# File 'lib/mysql2/metrics.rb', line 31

def self.measure_time(query, &block)
  start = Time.now
  ret = yield
  elapsed = Time.now - start
  logger = Mysql2::Metrics.logger
  logger.info({ query: query, elapsed: elapsed.to_f })
  ret
end