Hands-On Cloud-Native Microservices with Jakarta EE

Circuit breaker

As the name suggests, this pattern is named like this because it comes from the electronic circuit context.

It sounds familiar, doesn't it?

The purpose of the circuit breaker pattern is the same as bulkheads, but with a different approach. Here, too, a service calling another service that is not responding or is very slow might decrease the performance of the overall system.

There is also another reason to implement the circuit breaker, which is to avoid having to keep on calling a service that you already know is broken or not reachable.

Suppose service A is calling service B, and service B is down—service A should prevent such integration and respond with a timeout error or cached data. Electronically speaking, this is the ...