class Mysql2::Metrics

Public Class Methods

add_tracer(method) click to toggle source
# 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() click to toggle source
# 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) click to toggle source
# File lib/mysql2/metrics.rb, line 7
def self.logger=(logger)
  @logger = logger
end
measure_time(query) { || ... } click to toggle source
# 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