Open
When the CircuitBreaker is in the Open state it will short-circuit/fail-fast all requests - All requests short-circuit/fail-fast with ExecutionRejected - If a request is made after the configured resetTimeout passes, the CircuitBreaker is tripped into the a HalfOpen state, allowing one request to go through as a test.
Parameters
openingStrategy
is the strategy that will decide if the circuit breaker should open after some failures.