com.hazelcast.core.MembershipListener Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, 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;
/**
* Cluster membership listener.
*
* The MembershipListener will never be called concurrently and all MembershipListeners will receive the events
* in the same order.
*
* @see InitialMembershipListener
* @see Cluster#addMembershipListener(MembershipListener)
*/
public interface MembershipListener extends EventListener {
/**
* Invoked when a new member is added to the cluster.
*
* @param membershipEvent membership event
*/
void memberAdded(MembershipEvent membershipEvent);
/**
* Invoked when an existing member leaves the cluster.
*
* @param membershipEvent membership event when an existing member leaves the cluster
*/
void memberRemoved(MembershipEvent membershipEvent);
/**
* Invoked when an attribute of a member was changed.
*
* @param memberAttributeEvent member attribute event when an attribute of a member was changed
* @since 3.2
*/
void memberAttributeChanged(MemberAttributeEvent memberAttributeEvent);
}