Creating Circuit Breaker with 100 Lines of Code. “If you want to avoid your entire service going down because one component is down, you should use a circuit breaker,”
“If you want to avoid your entire service going down because one component is down, you should use a circuit breaker,” Kevin told me when I try to design one of our microservices. We talked in front of the ramen shop on a cold winter night in New York City in 2019.
I asked him, “What is it exactly, circuit breaker?”, “Dude! It is a popular microservice pattern. Search it up!”
I pull out my phone and start typing “Circuit Breaker.” In brief, it a mechanism that helps improve the resiliency of your services. I thought to myself, I need to understand more about the tool of this. Therefore, I determined to go back that day, do more research, and implement my own circuit breaker version.
Surprise, surprise — as always, I procrastinated. Fast forward 2 years later, I have learned so much about distributed systems, Scala, and functional programming — and I would like to share the what and the how of circuit breaker mechanism. In this article, I would like to share how I created a circuit breaker library using scala and leveraging the concurrent primitive types.
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