Messaging

Common advice is to not publish domain events outside of your service boundary. They should only exist within your service boundary. Instead, you should publish integration events for other service boundaries. While this general advice makes sense, it’s not so cut-and-dry. There are many reasons why you would want to publish domain events for other services to consume. Here are how I think of Domain Events and Integration Events and when to use them. YouTube Check out my YouTube channel where I post all kinds of content that accompanies my posts including this video showing everything that is in this post. Domain… Read More »Should you publish Domain Events or Integration Events?

There are many different ways to create events in Event Driven Architecture. Events from CRUD or created from specific actions that have occurred. In some cases, consumers only care about the full scope of an entity/data. In other boundaries, consumers only care about what has occurred. When publishing events from CRUD you’ll likely care more about propagating state. However, events derived from tasks/commands are often used more as notifications about business process occurrences. YouTube Check out my YouTube channel where I post all kinds of content that accompanies my posts including this video showing everything that is in this post. CRUD When… Read More »Publishing Events from CRUD or Commands?

Here are my top 5 patterns and concepts (Outbox, Idempotent Consumers, Event Choreography, Orchestration, Retry/Dead Letter) for Event Driven Architecture that you’ll likely implement. Why? Well if you’re new to Event Driven Architecture there are many different problems that you’ll encounter. Most of the issues have well-established patterns or concepts you can leverage to deal with them. Here are the most common patterns for Event Driven Architecture that you’ll likely use. YouTube Check out my YouTube channel where I post all kinds of content that accompanies my posts including this video showing everything that is in this post. Outbox Pattern Generally, you’re… Read More »My TOP Patterns for Event Driven Architecture