How does a circuit breaker handle failures of external services?

The article on the Circuit Breaker design pattern discusses how it is used in complex systems and high-load applications. Circuit Breaker aims to increase application resilience against external errors, such as malfunctioning services. The main idea of this pattern is to monitor any external dependency and 'open' the circuit in cases of issues. This allows the system to quickly react to failures by stopping requests to the faulty services, ultimately allowing them to stabilize. The author also explores the differences between Circuit Breaker and other techniques such as Retry or Timeout, providing specific examples of use cases. In conclusion, he highlights the benefits of implementing this pattern, including increased availability and improved user experience.