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Derek Comartin

Event Sourcing vs Event Driven Architecture

Event Sourcing is seemingly constantly being confused with Event Driven Architecture. In this blog/video I’m going through a popular blog post that explains various points that are very valid, however, they are conflating Event Sourcing with Event Driven Architecture. Event Sourcing is about using events as the state. Event Driven Architecture is about using events to communicate between service boundaries. 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. Event Sourcing vs Event Driven Architecture There is a blog post that keeps making its… Read More »Event Sourcing vs Event Driven Architecture

Securing Sensitive Data in an Event Driven Architecture

You secure sensitive data when stored in a database, but are you securing sensitive data in an event or message driven architecture? For example, if you need to include Credit Card information in a message for a queue to be processed. But need to be compliant with PCI-DSS! You can encrypt the actual message or a portion of the message, or if the broker supports it, use server-side encryption. 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. Transfering Senstive Data When not using… Read More »Securing Sensitive Data in an Event Driven Architecture

When NOT to write an Abstraction Layer

Common advice is to abstract dependencies. Often this is because people have been burned by depending directly upon 3rd party dependencies that they are highly coupled to. If they need to change the dependency, which they are highly coupled with, it can be pretty painful. This is why people say to create an abstraction layer around any dependency to isolate it so that your application code is coupled to yourself rather than a 3rd party. While this is generally true, it depends, and you don’t want to create an abstraction that is more work in the short and long run… Read More »When NOT to write an Abstraction Layer