Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Circuit Breakers em Ruby
Search
Lucas Mazza
November 19, 2016
Programming
1
370
Circuit Breakers em Ruby
Lucas Mazza
November 19, 2016
Tweet
Share
More Decks by Lucas Mazza
See All by Lucas Mazza
OpenAPI e Elixir (e qualquer outra linguagem)
lucas
0
62
Ecto sem SQL
lucas
0
360
Feature Toggles! - Elixir
lucas
3
480
Feature Toggles! - Ruby
lucas
2
330
Testes automatizados e a prática antes da teoria
lucas
0
390
The Zen and Art of Refactoring
lucas
4
790
Minitest: voltando ao básico sobre testes
lucas
1
370
10 coisas que eu gostaria de ter aprendido mais cedo
lucas
67
5.4k
gems, executáveis e configurações
lucas
5
370
Other Decks in Programming
See All in Programming
CDK引数設計道場100本ノック
badmintoncryer
2
560
可変性を制する設計: 構造と振る舞いから考える概念モデリングとその実装
a_suenami
2
270
Gemini CLIの"強み"を知る! Gemini CLIとClaude Codeを比較してみた!
kotahisafuru
2
150
状態遷移図を書こう / Sequence Chart vs State Diagram
orgachem
PRO
3
250
構造化・自動化・ガードレール - Vibe Coding実践記 -
tonegawa07
0
140
20250708_JAWS_opscdk
takuyay0ne
2
150
リッチエディターを安全に開発・運用するために
unachang113
1
240
型で語るカタ
irof
0
800
顧客の画像データをテラバイト単位で配信する 画像サーバを WebP にした際に起こった課題と その対応策 ~継続的な取り組みを添えて~
takutakahashi
4
1.4k
PHPUnitの限界をPlaywrightで補完するテストアプローチ
yuzneri
0
270
DMMを支える決済基盤の技術的負債にどう立ち向かうか / Addressing Technical Debt in Payment Infrastructure
yoshiyoshifujii
4
590
「次に何を学べばいいか分からない」あなたへ──若手エンジニアのための学習地図
panda_program
3
640
Featured
See All Featured
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
34
3.1k
The Cost Of JavaScript in 2023
addyosmani
51
8.6k
Agile that works and the tools we love
rasmusluckow
329
21k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
161
15k
What's in a price? How to price your products and services
michaelherold
246
12k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
34
5.9k
Why You Should Never Use an ORM
jnunemaker
PRO
58
9.5k
Facilitating Awesome Meetings
lara
54
6.5k
Scaling GitHub
holman
461
140k
Making Projects Easy
brettharned
116
6.3k
Gamification - CAS2011
davidbonilla
81
5.4k
Fireside Chat
paigeccino
37
3.5k
Transcript
Circuit Breakers em Ruby
@lucasmazza http://afterhours.io/
None
None
https://sp.femug.com https://github.com/femug/femug
Circuit Breakers em Ruby
None
None
None
None
❓
None
None
rescue_from StandardError do render text: 'oops' end
rescue_from StandardError do render text: 'oops' end ❓❓❓❓❓❓❓❓❓ ❓❓❓❓❓❓❓❓❓
“You wrap a protected function call in a circuit breaker
object, which monitors for failures.” http://martinfowler.com/bliki/CircuitBreaker.html
https://pragprog.com/book/mnee/release-it
None
None
None
None
None
None
None
None
Estado + transições
✓ Timeouts
✓ Timeouts ✓ Downtimes
✓ Timeouts ✓ Downtimes ✓ Picos de erros
✓ Timeouts ✓ Downtimes ✓ Picos de erros ✓ Má
configuração
★ Limite de falhas
★ Limite de falhas ★ Tempo para reset
★ Limite de falhas ★ Tempo para reset ★ Erros
a ignorar
None
❓API pública ❓Gestão do estado ❓Concorrência
jnunemaker/resilient
require 'resilient/circuit_breaker' circuit_breaker = Resilient::CircuitBreaker.get('acme-co-api') if circuit_breaker.allow_request? begin # API
Call circuit_breaker.success rescue => boom circuit_breaker.failure # do fallback end else # do fallback end
circuit_breaker = Resilient::CircuitBreaker.get('example', { # at what percentage of errors
should we open the circuit error_threshold_percentage: 50, # do not try request again for 5 seconds sleep_window_seconds: 5, # do not open circuit until at least 5 requests have happened request_volume_threshold: 5, }) # etc etc etc
✅ Boa API pública ⚠ Não é distribuído ⚠ Não
é concorrente
✅ Instrumentação & Métricas
shopify/semian
gem 'semian', require: %w(semian semian/redis) def fetch_user User.find(session[:user_id]) rescue Redis::CannotConnectError
nil end
Semian.register(:mysql_shard0, timeout: 0.5, error_threshold: 3, error_timeout: 10) Semian[:mysql_shard0].acquire do #
Perform a MySQL query here end
“Semian is not a trivial library to understand, introduces complexity
and thus should be introduced with care.” https://github.com/shopify/semian#do-i-need-semian
“It is paramount that you understand Semian before including it
in production as you may otherwise be surprised by its behaviour.” https://github.com/shopify/semian#do-i-need-semian
⚠ Monkeypatch ⚠ estado por host ✅ Concorrente
✅ Suporte a instrumentação ✅ Battle tested
orgsync/stoplight
light = Stoplight('acme-co-api') { do_api_call } .with_fallback { do_fallback }
.with_threshold(3) # => Stoplight::Light light.color #=> 'green', 'yellow' ou 'red' light.run
require 'redis' redis = Redis.new data_store = Stoplight::DataStore::Redis.new(redis) Stoplight::Light.default_data_store =
data_store slack = Slack::Notifier.new('http://www.example.com/webhook-url') notifier = Stoplight::Notifier::Slack.new(slack) Stoplight::Light.default_notifiers += [notifier] notifier = Stoplight::Notifier::Logger.new(Rails.logger) Stoplight::Light.default_notifiers += [notifier]
⚠ API não idiomática ✅ Distribuído ✅ Concorrente
✅ Implementação bem legível
netflix/hystrix
None
orgsync/stoplight
class CircuitBreaker def initialize(client, name) @client = client @name =
name end def method_missing(method, *args, &block) Stoplight(@name) { @client.public_send(method, *args, &block) }.run end end
gh_client = GitHub::Client.new('acme-co-oauth2-token') client = CircuitBreaker.new(gh_client, 'client-acme-co') # Requests feito
dentro do Circuit Breaker client.repo('plataformatec/devise') client.repo('plataformatec/simple_form') client.repo('plataformatec/faraday-http-cache')
Pattern + Gem Você!
❓Monitoramento
Métricas
StatsD Librato NewRelic AppSignal …
Notificações
Notificações
Reset manual
❓Fallback vs raise
Escrita vs leitura sync vs async
Executar uma operação em background Retry + backoff
Ler dados de uma API Fallback e/ou cache
None
Obrigado! @lucasmazza