| Interface | Description | 
|---|---|
| RetryEventListener | Generalization of  ApplicationEventListenerforRetryEvent. | 
| Class | Description | 
|---|---|
| CircuitClosedEvent | An event fired when a Circuit is  CircuitState.CLOSEDand has resumed
 accepting requests. | 
| CircuitOpenEvent | An event fired when the Circuit is  CircuitState.OPENand
 requests are no longer being accepted. | 
| RetryEvent | An event triggered on each retry. |