Code Explainers

Code explainers tagged #service-object

ruby 
require "shellwords"
require "open3"
 
module Backup

Building safe shell commands in Ruby

shell-out subprocess command-injection
Intermediate 7 steps
ruby 
class WeatherLookup
  Result = Struct.new(:temperature, :conditions, keyword_init: true)
 
  class TimeoutError < StandardError; end

A resilient weather API service object in Rails

service-object http-client error-handling
Intermediate 7 steps
ruby 
class ToastBroadcaster
  include ActionView::RecordIdentifier
 
  def self.broadcast_to(user, message:, type: :notice)

How Turbo Stream toasts broadcast in Rails

turbo-streams service-object real-time
Intermediate 6 steps
ruby 
class DashboardMetrics
  CACHE_TTL = 15.minutes
 
  def initialize(account)

Caching dashboard metrics in Rails

caching service-object query-optimization
Intermediate 5 steps
ruby 
class InactiveAccountCleanup
  BATCH_SIZE = 500
  INACTIVITY_THRESHOLD = 18.months
 

Batch-processing dormant users in Rails

batch-processing activerecord service-object
Intermediate 9 steps
ruby 
class ReportGenerator
  def initialize(account, period)
    @account = account
    @period = period

Memoized report metrics in Ruby in Rails

memoization query-composition service-object
Intermediate 7 steps
ruby 
class ReportBatcher
  BATCH_SIZE = 500
 
  def initialize(account)

Batching monthly email summaries in Rails

batching service-object background-jobs
Intermediate 7 steps