Csharp

Introduction Polly is a .NET resilience and transient-fault-handling library. It lets you express strategies like retry, circuit breaker, timeout, rate limiting, hedging, and fallback around any piece of code, so a flaky downstream dependency doesn’t automatically become an outage in your own service. If you used Polly a few years ago and haven’t looked at it since, the library you remember is gone. Polly v8 was a ground-up rewrite, built in collaboration with Microsoft, and it changes both the API and the mental model. This post is a practical, current tour of what Polly looks like today: pipelines instead of policies, the built-in HTTP resilience handlers, hedging, chaos engineering support, and the one thing that’s changed about the license terms that maintainers of paid products should know about. ...

Introduction I have long waffled on whether a GUID or integer make for the best primary key. I wrote this with the goal of refining or challenging my current opinion. The identity, or primary key, uniquely identifies an entity or record. To be clear, ‘identity’ is a Domain Driven Design concept that describes an immutable identifying attribute of an entity (not to be confused with a SQL Server identity column, which is an automatically incrementing integer). A ‘primary key’ is a database concept that serves the same purpose for a record and enforces referential integrity. In this post, I will use the term ‘primary key’, since we are focusing on the database. The concept of an identity attribute is more than just a database concern, it is a domain concern, but it is important to consider where these concerns intersect. ...