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
310
Circuit Breakers em Ruby
Lucas Mazza
November 19, 2016
Tweet
Share
More Decks by Lucas Mazza
See All by Lucas Mazza
Ecto sem SQL
lucas
0
290
Feature Toggles! - Elixir
lucas
3
350
Feature Toggles! - Ruby
lucas
2
310
Testes automatizados e a prática antes da teoria
lucas
0
360
The Zen and Art of Refactoring
lucas
4
590
Minitest: voltando ao básico sobre testes
lucas
1
340
10 coisas que eu gostaria de ter aprendido mais cedo
lucas
67
5.2k
gems, executáveis e configurações
lucas
5
340
O que o Front end pode aprender com Rails
lucas
4
770
Other Decks in Programming
See All in Programming
Folding Cheat Sheet #2
philipschwarz
PRO
0
110
今の SmartHR にエンジニアで入社するとどうなるの?
daisukeshinoku
5
4.6k
StreamlitとTerraformでデータカタログを作った話
gussan0223
0
300
データアナリストが行うDatabricksを活用したETLの自動化事例
shinoa
0
250
TYPO3 v13 – The road to LTS: What's new and new APIs
luisasofie_xoxo
0
180
9年開発を牽引して見えてきた、共通化すべきものと個別でつくるもの ~プログラム言語~
shinout
1
640
本格ローグライク制作にEbitengineを選んでみた
nagainaganawa
0
290
Blue/Greenデプロイの導入による 運用フローの改善
kudoas
1
350
スクラムチームと認知負荷 - ニフティのスクラムトーク Vol2. / NIFTY Tech Talk #18
niftycorp
PRO
1
120
HUIT新歓2024「競技プログラミング、やってみませんか?」
slephy2784
1
250
VSCodeでのDatabricks開発もお勧めしたい/I would also recommend Databricks development with VSCode.
kazumain
0
240
FigmaとPHPで作る1ミリたりとも表示崩れしない最強の帳票印刷ソリューション
ttskch
39
18k
Featured
See All Featured
Into the Great Unknown - MozCon
thekraken
10
980
Pencils Down: Stop Designing & Start Developing
hursman
117
11k
From Idea to $5000 a Month in 5 Months
shpigford
377
45k
The MySQL Ecosystem @ GitHub 2015
samlambert
242
12k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
19
1.9k
Embracing the Ebb and Flow
colly
79
4.1k
Music & Morning Musume
bryan
41
5.6k
Infographics Made Easy
chrislema
237
18k
Designing Experiences People Love
moore
136
23k
What’s in a name? Adding method to the madness
productmarketing
PRO
15
2.6k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
124
32k
The Cult of Friendly URLs
andyhume
74
5.7k
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