A simple ruby logger that emits l2met conventional data

log.rb

def log(data)
  result = nil
  if data.key?(:measure)
    name = data.delete(:measure).insert(0, ENV["APP_NAME"] + ".")
  end
  if block_given?
    start = Time.now
    result = yield
    elapsed = (Time.now.to_f - start.to_f) * 1000
    data.merge!("measure.#{name}" => elapsed.round)
  else
    data.merge!("measure.#{name}" => 1)
  end
  data.reduce(out=String.new) do |s, tup|
    quoted_tup = tup.last.is_a?(String) ? "\"#{tup.last}\"" : tup.last
    s << [tup.first, quoted_tup].join("=") << " "
  end
  $stdout.puts(out)
  return result
end

Usage:

ENV["APP_NAME"] = "myapp"
def db_write(some_data)
  log(measure: "db.write") do
    DB.write(some_data)
  end
end