Links tagged “design-pattern”

docs.microsoft.com

Microsoft's catalogue of technology-agnostic cloud design patterns — Ambassador, Circuit Breaker, CQRS, Saga, Sharding — each with its problem statement and trade-offs.

microservices.io

Pattern write-up: keep a read-only view database, synchronised by domain events, so a query can span data owned by several microservices.

martinfowler.com

Bliki entry on CQRS, the idea of splitting the conceptual model into separate models for update and for display, and when that split is worth its cost.

microservices.io

Pattern write-up: persist a business entity as its sequence of state-changing events, so updating the database and publishing a message become a single atomic act.

github.com

A repository of design patterns and idioms implemented in Python, sorted into creational, structural and behavioural groups.

push.cx

How to implement the flyweight pattern in Python, using __new__ and a weak-reference pool so that identical objects are shared instead of duplicated.