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Derek Comartin

Anti-corruption Layer for mapping between Boundaries

What does an anti-corruption layer solve? Most systems rely on data or behaviors from another service or an external 3rd party. The problem is they often don’t share the same semantics or data structures. Left unchecked this leads to convoluting up your own boundary with concepts from another boundary. Let me explain how you can use an anti-corruption layer as a way to translate the concepts from another boundary in isolation. 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. Anti-corruption Layer A Service… Read More »Anti-corruption Layer for mapping between Boundaries

Avoiding Distributed Transactions with the Reservation Pattern

A long-running business process could last seconds to days, you cannot lock resources within a service using a distributed transaction. So what’s the alternative? The real world has a solution, it’s a reservation. The reservation pattern allows you to have a time-bound limited guarantee which allows you to coordinate with other services. 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. Distributed Transaction When working with a traditional monolith, you can use a database transaction. Wrap all the relevant database calls within a transaction,… Read More »Avoiding Distributed Transactions with the Reservation Pattern

Building a Webhooks System with Event Driven Architecture

Do you need to integrate with external systems or services? Leveraging an event driven architecture enables you to build a webhooks system that can be decoupled from your main application code. Enabling you to call external systems that have subscribed via webhooks in complete isolation from your application code. 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. In-Process The simplest approach to building a webhooks system is to make calls in-process to the external HTTP APIs that want to be notified when we… Read More »Building a Webhooks System with Event Driven Architecture