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Event-driven integration #3 - Storing events in the outbox table [ASPF02O|E042]

On the footsteps of the last episode, in this one we store the inferred events in the outbox table, doing so transactionally, so we have guarantees that any change will eventually result in a published event.

Categories: fromzerotooverkill dotnet
Tags: dotnet aspnetcore efcore

Event-driven integration #2 - Inferring events from EF Core changes [ASPF02O|E041]

In this first step implementing event-driven integration between services, we’ll hook-up into EF Core’s infrastructure, namely when saving changes, to infer if any event should be raised based on the information provided by the change tracker.

Categories: fromzerotooverkill dotnet
Tags: dotnet aspnetcore efcore

Event-driven integration #1 - Intro to the transactional outbox pattern [ASPF02O|E040]

As we start implementing event-driven integration, the first thing we need to do is publish the events. Although it might seem straightforward, there are some important things to consider in order to make it work reliably. In this episode, we discuss the challenges and introduce the transactional outbox pattern to help us facing these challenges.

Categories: fromzerotooverkill dotnet
Tags: dotnet aspnetcore

Event-driven integration - Overview [ASPF02O|E039]

In this episode, we take a look at the integration problem we have between services right now, go through some options to avoid or fix it, then have a quick overview of the solution we’ll be implementing in the coming episodes.

Categories: fromzerotooverkill dotnet
Tags: dotnet aspnetcore

More explicit domain error handling and fewer exceptions with Either and Error types [ASPF02O|E038]

Following up on the last episode about the Optional type, we continue taking inspiration from functional languages and introduce Either and Error types, as a way to make the possible business logic outcomes more explicit and minimize using exceptions in non-exceptional situations.

Categories: fromzerotooverkill dotnet
Tags: dotnet aspnetcore

Better use of types - avoiding nulls with an Optional type [ASPF02O|E037]

In this post, we’ll make use of a concept most commonly associated with functional programming, the Optional type (aka Option or Maybe), in order to make our code safer and more explicit when expressing a lack of value, instead of leaning on the null reference, something that I’m sure has burned us many times in the past.

Categories: fromzerotooverkill dotnet
Tags: dotnet aspnetcore

E036 - Making things more object oriented with rich domain entities - ASPF02O

In this episode, we’ll make things more object oriented, by moving some logic that’s present in the request handlers, which in fact should be present in the domain entities, that currently are just bags of data with public getters and setters.

Categories: fromzerotooverkill dotnet
Tags: dotnet aspnetcore

A look at Building the Future 2020

This past week I had the opportunity to attend Building the Future 2020, an event focused on digital transformation, so I thought about sharing some of the main topics that stuck with me.

Categories: smalltalk
Tags: smalltalk

E035 - Experimenting with (yet) another approach to data access organization - ASPF02O

In this episode, we’ll take a look at (yet) another approach to organizing data access code, very likely overkill.

Categories: fromzerotooverkill dotnet
Tags: dotnet aspnetcore

E034 - Segregating use cases with MediatR - ASPF02O

In this episode, we’ll take a look at segregating our application use cases in dedicated classes instead of shoving everything into the same service class.

Categories: fromzerotooverkill dotnet
Tags: dotnet aspnetcore mediatr
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