/*
* 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.activemq.artemis.api.core.client;
/**
* A cluster topology listener.
* <p>
* Used to get notification of topology events. After adding a listener to the cluster connection,
* the listener receives {@link #nodeUP(TopologyMember, boolean)} for all the current topology
* members.
*/
public interface ClusterTopologyListener {
/**
* Triggered when a node joins the cluster.
*
* @param member
* @param last if the whole cluster topology is being transmitted (after adding the listener to
* the cluster connection) this parameter will be {@code true} for the last topology
* member.
*/
void nodeUP(TopologyMember member, boolean last);
/**
* Triggered when a node leaves the cluster.
*
* @param eventUID
* @param nodeID the id of the node leaving the cluster
*/
void nodeDown(long eventUID, String nodeID);
}