/*
 * Copyright 2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License
 */
package dev.failsafe.event;

import dev.failsafe.CircuitBreaker.State;

/**
 * Indicates a circuit breaker's state changed.
 *
 * @author Jonathan Halterman
 */
public class CircuitBreakerStateChangedEvent {
  private final State previousState;

  public CircuitBreakerStateChangedEvent(State previousState) {
    this.previousState = previousState;
  }

  /**
   * Returns the previous state of the circuit breaker.
   */
  public State getPreviousState() {
    return previousState;
  }
}
