activesupport

ruby
class JsonLogFormatter < ActiveSupport::Logger::SimpleFormatter
  def call(severity, timestamp, _progname, message)
    if message.is_a?(Hash)
      entry = {
        ts: timestamp.utc.iso8601(3),
        level: severity

Lograge-Style JSON Logging Without Extra Gems

rails logging observability
by codesnips 3 tabs
ruby
class CheckoutService
  def initialize(cart:, user:)
    @cart = cart
    @user = user
  end

Instrument a Service with Notifications

rails observability instrumentation
by codesnips 3 tabs
ruby
class CacheNamespace
  attr_reader :name

  def initialize(name, store: Rails.cache)
    @name = name.to_s
    @store = store

Cache Key Versioning with a Single “namespace”

rails caching cache-invalidation
by codesnips 3 tabs
ruby
class Current < ActiveSupport::CurrentAttributes
  attribute :user, :tenant, :request_id, :ip_address

  def user_display
    user&.email || "system"
  end

CurrentAttributes for Request-Scoped Context

rails activesupport currentattributes
by codesnips 4 tabs
ruby
class User < ApplicationRecord
  has_secure_password

  RESET_TOKEN_TTL = 30.minutes

  def self.reset_verifier

Signed Password Reset Tokens with ActiveSupport::MessageVerifier in Rails

rails authentication password-reset
by codesnips 3 tabs
ruby
class LeaderboardCache
  TOP_KEY = "leaderboard:top".freeze
  STATS_KEY = "leaderboard:stats".freeze

  def top_players
    Rails.cache.fetch(TOP_KEY, expires_in: 5.minutes, race_condition_ttl: 15.seconds) do

Cache Stampede Protection with race_condition_ttl

rails caching performance
by codesnips 3 tabs
ruby
class ApplicationError < StandardError
  attr_reader :context

  class << self
    def context_keys(*keys)
      @context_keys = keys unless keys.empty?

Structured Exceptions with Context

rails observability exceptions
by codesnips 3 tabs