architecture – Page 19 – Türker Yıldırım

Deprecating a field with a header and a date

NoteMarch 21, 20231 min read

Removing a field from an API response needs a period where consumers can see it is going, and a way to know whether anybody still reads it. The…

A block that renders on the server and edits on the client

Deep diveMarch 17, 202310 min read

A block showing live stock levels, which cannot be saved into post content. Static markup that was wrong the moment it was written.

A read replica, and the six queries that could not use it

Deep diveMarch 16, 202314 min read

A primary at 80% CPU and reports running during the working day. Setting up the replica takes an afternoon; the consistency model takes a month.

A base image we build ourselves, and the CVE report that paid for it

Deep diveMarch 15, 202310 min read

A scanner reporting 41 vulnerabilities, 39 of them in packages we do not use. A weekly report that has never once been actionable.

Aggregate boundaries drawn by transaction, not by noun

NoteMarch 14, 20232 min read

An order aggregate containing its lines, its shipments, its refunds and its notes, loaded in full to change a delivery address. Drawing the boundary by what belongs together…

A domain service that exists because two entities disagree

NoteMarch 13, 20232 min read

Transferring stock between two warehouses belongs to neither warehouse, and putting it on one of them makes that one special for no reason. This is the case a…

A command handler that returns nothing, and the id the caller wanted

NoteMarch 6, 20232 min read

A handler that returns void is the pure form, and the controller behind it needs the identifier of the thing it just created. Generating the identifier at the…

The generic PHP does not have, and the analyser that does

Deep diveFebruary 27, 20239 min read

A collection class that returns mixed, and forty call sites asserting the type by hand. Docblock generics, and where they stop being worth it.

Reading a service in another language well enough to file a bug

NoteFebruary 22, 20232 min read

A service owned by somebody else, in a language I do not write, returning the wrong value — and “it is broken” is not a bug report. Reading…

PHPUnit 10, and the listeners that no longer exist

Deep diveFebruary 20, 202314 min read

10.0 in February, a configuration file that has accreted since 2014, and a custom TestListener that the new version has no place for.