design-patterns – Page 10 – Türker Yıldırım

A mock that records is a stub with a receipt

NoteNovember 15, 20212 min read

A stub provides answers and a mock asserts on the calls, and conflating them produces tests that break when the implementation is refactored. Asserting on a call that…

Symfony 6 requires PHP 8 and that is the whole upgrade

Deep diveNovember 15, 20219 min read

5.4 LTS and 6.0 on the same day, and a deprecation log with four thousand lines nobody reads. The work is all in 5.4.

The retry that made the outage longer

Deep diveOctober 21, 202116 min read

A dependency recovered and went straight back down. Every client retrying at once, in lockstep, is a load test nobody scheduled.

The anti-corruption layer is one file and it earns its keep

NoteSeptember 2, 20212 min read

A third-party model that leaks into your domain spreads their vocabulary through your code, and the translation belongs in one place. The value shows up at the provider…

script setup, and the Vue component that lost its boilerplate

Deep diveAugust 17, 202110 min read

3.2 in August makes the compiler macro stable. Every component ended with a return listing what it had just declared, and a compiler can work that out.

Queue priority is not a number, it is a separate queue

Deep diveJune 8, 202110 min read

Password resets stuck behind a nightly export. A priority field does not help when the worker is already four minutes into something else.

A webhook endpoint that survives the sender

Deep diveJune 2, 202110 min read

The payment provider retried for six hours and every attempt timed out. A webhook is a notification, not a request for processing.

The service that should not have been a service

Deep diveMay 14, 202110 min read

Four services, three of which deploy together and share a database. The costs of distribution with none of the independence.

Constructor promotion plus validation, in that order

NoteApril 30, 20212 min read

Promoted properties are assigned before the constructor body runs, so validation in the body reads either the parameter or the property and gets the same value. Mixing promoted…

Octane keeps the application in memory and finds every static you left

Deep diveApril 21, 202110 min read

40ms becomes 8ms, and the fourth request returns another customer’s data. The shared-nothing assumption is load-bearing in more places than anybody had counted.