AkkaCircuitBreakerFailurewall
Related Docs:
object AkkaCircuitBreakerFailurewall
| package circuitbreaker
Akka's CircuitBreaker
feedback logic to test the result
ExecutionContext
Wraps a call in this circuit breaker.
Wraps a call in this circuit breaker.
call that needs protected
the result of body with this Failurewall
a failed future with FailurewallException if a call is rejected
A circuit breaker with Failurewall's interface implemented by Akka's CircuitBreaker. Calls wrapped in AkkaCircuitBreakerFailurewall are protected by circuit breaker mechanisms. A circuit breaker prevents a failure form cascading any other failures.
A circuit breaker is a state machine that has a following state.
- CLOSED - OPEN - HALF-OPEN
The
CLOSEDstate is the ordinary state. In this state, calls are executed and failure statistics are recorded. When failure count exceeds the threshold, the circuit breaker switches into theOPENstate.The
OPENstate is the state under problems. In this state,callnever executes thebodyand returns an error immediately, so-calledfail-fast. TheOPENstate prevents applications from accessing resources under problems. After the configured timeout, the circuit breaker switches into theHALF-OPENstate.The
HALF-OPENstate is the challenge phase. In this state, the firstcallexecutes thebodyin order to test that the problem is fixed. The other calls never execute bodies and return errors immediately. If the first call succeeds, the circuit breaker switches toCLOSEDstate. If the first call fails, the circuit breaker switches toOPENstate.