codesnips

feature-flags

ruby 
class AddSettingsToAccounts < ActiveRecord::Migration[7.1]
  disable_ddl_transaction!

  def change
    add_column :accounts, :settings, :jsonb, null: false, default: {}

Postgres JSONB Partial Index for Feature Flags

rails postgres jsonb
by codesnips 3 tabs
ruby 
class FeatureFlag < ApplicationRecord
  validates :key, presence: true, uniqueness: true
  validates :percentage, inclusion: { in: 0..100 }

  after_commit :expire_cache

Safer Feature Flagging: Cache + DB Fallback

rails caching reliability
by codesnips 3 tabs
ruby 
class CircuitBreaker
  class CircuitOpenError < StandardError; end

  INCREMENT = <<~LUA.freeze
    local n = redis.call('INCR', KEYS[1])
    if n == 1 then redis.call('EXPIRE', KEYS[1], ARGV[1]) end

Graceful Degradation: Feature-Based Rescue

rails resilience circuit-breaker
by codesnips 3 tabs
java 
package com.example.demo.feature;

import org.togglz.core.Feature;
import org.togglz.core.annotation.EnabledByDefault;
import org.togglz.core.annotation.Label;
import org.togglz.core.context.FeatureContext;

Feature flags for gradual rollouts

java feature-flags togglz
by David Kumar 4 tabs
erb 
<%= turbo_frame_tag dom_id(flag) do %>
  <tr class="flag-row">
    <td class="flag-name"><%= flag.name %></td>
    <td class="flag-env"><%= flag.environment %></td>
    <td class="flag-state">
      <span class="badge badge--<%= flag.enabled? ? 'on' : 'off' %>">

Admin “quick toggle” with Turbo Streams and a single partial

rails hotwire turbo
by codesnips 4 tabs
typescript 
export const FLAG_REGISTRY = {
  newDashboard: {
    default: false as boolean,
    description: 'Renders the redesigned dashboard shell',
  },
  maxUploadMb: {

Feature flags with a typed registry

typescript feature-flags react
by codesnips 3 tabs
go 
package flags

import (
  "context"
  "encoding/json"
  "sync/atomic"

Feature flag snapshot with periodic refresh and atomic reads

go config reliability
by Leah Thompson 1 tab