Mastering Spring Cloud

The circuit breaker pattern with Hystrix

We have already discussed the different implementations of load balancer algorithms in Spring Cloud Netflix. Some of them are based on monitoring the instance response time or the number of failures. In these cases, a load balancer makes decisions about which instance should be invoked based on these statistics. The circuit breaker pattern should be treated as an extension of that solution. The main idea behind a circuit breaker is very simple. A protected function call is wrapped in a circuit breaker object, which is responsible for monitoring a number of failure calls. If the failures reach a threshold, the circuit is opened, and all further calls will be failed automatically. Usually, it is also ...