hazelcast-master/hazelcast/src/main/java/com/hazelcast/core/LifecycleListener.java
/*
 * Copyright (c) 2008-2023, Hazelcast, Inc. All Rights Reserved.
 *
 * 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 com.hazelcast.core;

import java.util.EventListener;

/**
 * Listener object for listening to lifecycle events of the Hazelcast instance
 *
 * @see com.hazelcast.core.LifecycleEvent
 * @see HazelcastInstance#getLifecycleService()
 *
 */
@FunctionalInterface
public interface LifecycleListener extends EventListener {
    /**
     * Called when instance's state changes. No blocking calls should be made in this method.
     * @param event the Lifecycle event
     */
    void stateChanged(LifecycleEvent event);
}
