architecture – Page 42 – Türker Yıldırım

An event is a fact; a command is an instruction

NoteNovember 27, 20192 min read

The naming decides the coupling. ReserveInventory names a recipient and expects an outcome; OrderPlaced names neither, so a second consumer can be added without touching the publisher. Past…

TypeScript on a JavaScript codebase, one file at a time

Deep diveNovember 8, 201910 min read

3.7 shipped optional chaining in November and the objection got smaller. allowJs, checkJs and a per-file opt-in — and strictNullChecks, which is the flag that pays.

An index that was never used, and the week it took to prove it

Deep diveNovember 8, 201910 min read

Forty indexes on one table and nobody willing to drop any of them. Invisible indexes turn a guess into a week of production traffic as evidence.

Writing the row and the event in the same transaction

NoteNovember 7, 20192 min read

Saving a record and publishing an event are two systems and cannot be made atomic, so either the row exists with no event or the event was sent…

Lumen 6 and the point where a micro-framework stops paying

NoteNovember 6, 20192 min read

The service that started as six endpoints now has a scheduler, three queue workers, two admin screens and four people working on it — and every one of…

A correlation id through the queue, or the trail stops there

NoteOctober 25, 20192 min read

One identifier generated at the edge and attached to every log line turns an incident into a single query — and the hop most implementations lose is the…

A read model is a copy, and copies need a story about staleness

NoteOctober 17, 20192 min read

Replicating the data a second service reads removes the shared schema and introduces a lag, and the lag is a product decision rather than a technical detail. Storing…

The N+1 in the ORM you cannot see from the template

Deep diveOctober 17, 201910 min read

Subquery selects in 6.0, and the aggregate that used to be a loop. Eager loading is all-or-nothing per relation, which is the problem.

Fatal errors that reach a person before they reach a customer

Deep diveOctober 2, 201910 min read

The error tracker had 400,000 events and nobody had opened it in a month. Alert fatigue, in the one tool that exists to prevent it.

Laravel 6 adopted semver, and the upgrade got boring

Deep diveSeptember 25, 20199 min read

5.8 to 6.0 is a smaller change than 5.7 to 5.8 was, which is the point. What semver means for a framework, and what LTS actually promises.