Microservices

Series · 8 parts

Contract Testing with Pactify

Unit tests mock what you assume, end-to-end tests tell you too late - consumer-driven contract testing closes the gap, and a small open-source .NET library called Pactify is the clearest way I know to learn how it works. Part 1 of a series.

Start with part 1 → ≈ 48 min total

Series · 8 parts

Convey — The Missing Chapters

The 22-part Convey series read the packages; it never once walked the sample system that ships with them. Opening the missing chapters with the trip an order takes through Orders, Pricing and Deliveries — and what the samples quietly teach that no package README does.

Start with part 1 → ≈ 50 min total

Series · 16 parts

GroupFlights — Strategy Before Code

Most repositories ship code and a README - this one ships four ADRs with a named approver, a context map, a domain message flow and a methodology poster. Part 1 of a series that reads the strategic half of DevMentors' GroupFlights.

Start with part 1 → ≈ 110 min total

Series · 22 parts

Microservices with Convey

Every team's fifth microservice ships with the same four hundred lines of bootstrap code as the first four. Opening a deep-dive series on Convey, the open-source .NET toolkit that turned that boilerplate into thirty composable packages.

Start with part 1 → ≈ 120 min total

Series · 15 parts

Nine Services and a Message Bus

DShop is one e-commerce shop stamped out as nine microservices over RabbitMQ - this series reads the real source to see how the topology holds together and where it drifts. Part 1 of Nine Services and a Message Bus.

Start with part 1 → ≈ 85 min total

Series · 12 parts

One Module Leaves the Process

Every modular monolith promises you can extract a module later. Inflow has a branch where someone actually did it - one module lifted into its own process behind a gateway and a real broker. This series reads that branch line by line.

Start with part 1 → ≈ 81 min total

Series · 16 parts

One Shop, Every Shape

DevMentors built the same e-commerce shop twice - once as a monolith, once as nine services - with two gateways and two frontends. This series reads the whole estate as one artefact.

Start with part 1 → ≈ 86 min total

Series · 11 parts

Real-Time Feeds with FeedR

A guided tour of FeedR, DevMentors' open-source .NET microservices sample for real-time data feeds - six services, Redis pub/sub, Apache Pulsar and a gRPC stream, and the two-tier eventing model that makes it worth reading. Part 1 of a source-level deep dive.

Start with part 1 → ≈ 73 min total

Series · 9 parts

Sagas with Chronicle

Split one database into five services and the transaction you deleted does not disappear - it goes feral. On sagas, compensation, process managers, and Chronicle, the small open-source .NET library this series reads line by line.

Start with part 1 → ≈ 53 min total

Series · 13 parts

The Convey Consumer Tax

Convey sells a microservice in thirty lines, and Pacco builds ten of them - this series reads the whole estate to price what the framework compresses and what every consumer pays for by hand. Part 1 of The Convey Consumer Tax.

Start with part 1 → ≈ 88 min total

Series · 15 parts

The Order That Choreographs Itself

Nobody in Pacco approves an order - a vehicle reservation does. A tour of DevMentors' parcel-delivery estate, the domain it models, and the fifteen-part series it earns.

Start with part 1 → ≈ 96 min total

Series · 13 parts

Trill Two Ways

DevMentors shipped Trill as nine microservice repos, then rebuilt the identical product as a modular monolith three months later - giving us a controlled experiment in architecture that almost never exists in public.

Start with part 1 → ≈ 88 min total

Series · 15 parts

Trill — Reading the Services

Trill's Stories service is four projects with a dependency-free domain at the bottom. Its Users service is two projects with everything in one assembly - same author, same week, same estate, opposite answers to what a layer is.

Start with part 1 → ≈ 101 min total

Series · 15 parts

Trill — The Microservices Spine

The DevMentors Trill estate is a nine-service microservices sample spread over eleven sibling repositories with no README, no clone script and no bootstrap tooling - and the only artefact that names the whole system is a Visual Studio solution file.

Start with part 1 → ≈ 100 min total

Series · 15 parts

Two Gateways and a Nervous System

Thirteen repositories, one umbrella that runs twelve of them, two interchangeable API gateways and a service that watches everything - the Pacco estate read as a system of systems, and the fifteen-part series it earns.

Start with part 1 → ≈ 102 min total