/*
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license
* agreements. See the NOTICE file distributed with this work for additional information regarding
* copyright ownership. The ASF licenses this file to You 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 org.apache.geode.management.membership;
/**
* A listener whose callback methods are invoked when members join or leave the GemFire distributed
* system.
*
* @see org.apache.geode.management.ManagementService#addMembershipListener
*
* @since GemFire 8.0
*/
public interface MembershipListener {
/**
* Invoked when a member has joined the distributed system
*/
public void memberJoined(MembershipEvent event);
/**
* Invoked when a member has gracefully left the distributed system. This occurs when the member
* took action to remove itself from the distributed system.
*/
public void memberLeft(MembershipEvent event);
/**
* Invoked when a member has unexpectedly left the distributed system. This occurs when a member
* process terminates abnormally or is forcibly removed from the distributed system by another
* process, such as from <a href=../distributed/DistributedSystem.html#member-timeout> failure
* detection</a>, or <a href=../distributed/DistributedSystem.html#enable-network
* -partition-detection> network partition detection</a> processing.
*/
public void memberCrashed(MembershipEvent event);
}