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Derek Comartin

Processing Large Payloads with the Claim Check Pattern

How do you handle processing large payloads? Maybe a user has uploaded a large image that needs to be resized to various sizes. Or perhaps you need to perform some ETL on a text file and interact with your database. One way is with a Message broker to prevent any blocking from calling code. Combined with the Claim Check Pattern to keep message sizes small to not exceed any message limits or cause performance issues with your message broker. The pattern is to send the payload data to an external service or blob storage, then use a reference ID/pointer the… Read More »Processing Large Payloads with the Claim Check Pattern

Event Sourced Aggregate Design: Focus on Business Logic

Separating data and behaviors can have a pretty profound impact on your design. An Event Sourced Aggregate allows you to focus on business logic by having capabilities to produce data (Events). Event Sourcing does exactly this by limiting the amount of state you require only to that needed for business logic within an Aggregate. 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. Shipment Before jumping in code, the example I’m going to use is of a shipment. The simple setup is you have… Read More »Event Sourced Aggregate Design: Focus on Business Logic

Restructuring to a Vertical Slice Architecture

What is vertical slice architecture and how does it compare to clean architecture? Ultimately it’s about coupling and dependencies. With vertical slice architecture, you’re organizing your code across a feature rather than layers. The focus is on features and capabilities rather than technical concerns. Coupling is limited by the scope of the feature and the size of the vertical slice. 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. Clean Architecture Before jumping into Vertical Slice Architecture let me first talk about Clean Architecture… Read More »Restructuring to a Vertical Slice Architecture