Buzzword Buster – AOP

You can become a serverless blackbelt. Enrol to my 4-week online workshop Production-Ready Serverless and gain hands-on experience building something from scratch using serverless technologies. At the end of the workshop, you should have a broader view of the challenges you will face as your serverless architecture matures and expands. You should also have a firm grasp on when serverless is a good fit for your system as well as common pitfalls you need to avoid. Sign up now and get 15% discount with the code yanprs15!

Definition:

Aspect Oriented Programming (AOP) is a programming paradigm where each application can focus on its primary functions and core concerns by encouraging greater modularity and increasing separation of cross-cutting concerns (such as logging and authentication).

Purpose:

In any real-world applications, when you’re writing code to address the problem domain (say, booking an order) you might need to address other concerns such as:

  • persistence – writing to the database for example
  • transaction handling – defining transaction scope and setting rollback strategy, etc.
  • security – user authentication for example
  • logging – for auditing and debugging

So effectively you’re mixing multiple domains with fine-grained intersections and likely to end up with:

  • tangled code – making it more difficult to work out what the code is doing to address the core concern
  • boilerplate code at every intersection point – introducing duplicated code and increasing the size of the code base and the blast radius of any change that are not related to the problem domain, e.g. changing the persistence media..

AOP aims to address these problems by separating cross-cutting concerns into single units called aspects, each aspect encapsulates behaviours that affect multiple classes into reusable modules.

Parting thoughts..

As far as I can think of, the only drawback of AOP is that you no longer see all the behaviours of your class when you open it and it requires knowledge of the whole system to know what else are happening under the cover. Which interestingly, is the flip side of the same coin because you employ AOP when you don’t want to deal with cross-cutting concerns all the time!

One of the ways to mitigate this problem is to build up a culture in your team and standardise how AOP is implemented so that everyone is on the same page and there are few surprises.

Frameworks:

PostSharp provides a lightweight AOP framework for the .Net platform and is establishing itself as the de facto standard much like the way AspectJ has done for Java.

Liked this article? Support me on Patreon and get direct help from me via a private Slack channel or 1-2-1 mentoring.
Subscribe to my newsletter


Hi, I’m Yan. I’m an AWS Serverless Hero and I help companies go faster for less by adopting serverless technologies successfully.

Are you struggling with serverless or need guidance on best practices? Do you want someone to review your architecture and help you avoid costly mistakes down the line? Whatever the case, I’m here to help.

Hire me.


Skill up your serverless game with this hands-on workshop.

My 4-week Production-Ready Serverless online workshop is back!

This course takes you through building a production-ready serverless web application from testing, deployment, security, all the way through to observability. The motivation for this course is to give you hands-on experience building something with serverless technologies while giving you a broader view of the challenges you will face as the architecture matures and expands.

We will start at the basics and give you a firm introduction to Lambda and all the relevant concepts and service features (including the latest announcements in 2020). And then gradually ramping up and cover a wide array of topics such as API security, testing strategies, CI/CD, secret management, and operational best practices for monitoring and troubleshooting.

If you enrol now you can also get 15% OFF with the promo code “yanprs15”.

Enrol now and SAVE 15%.


Check out my new podcast Real-World Serverless where I talk with engineers who are building amazing things with serverless technologies and discuss the real-world use cases and challenges they face. If you’re interested in what people are actually doing with serverless and what it’s really like to be working with serverless day-to-day, then this is the podcast for you.


Check out my new course, Learn you some Lambda best practice for great good! In this course, you will learn best practices for working with AWS Lambda in terms of performance, cost, security, scalability, resilience and observability. We will also cover latest features from re:Invent 2019 such as Provisioned Concurrency and Lambda Destinations. Enrol now and start learning!


Check out my video course, Complete Guide to AWS Step Functions. In this course, we’ll cover everything you need to know to use AWS Step Functions service effectively. There is something for everyone from beginners to more advanced users looking for design patterns and best practices. Enrol now and start learning!