/*
* 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.hadoop.hbase.master;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.ServerName;
/**
* Get notification of server registration events. The invocations are inline
* so make sure your implementation is fast or else you'll slow hbase.
*/
@InterfaceAudience.Private
public interface ServerListener {
/**
* Started waiting on RegionServers to check-in.
*/
default void waiting() {};
/**
* The server has joined the cluster.
* @param serverName The remote servers name.
*/
default void serverAdded(final ServerName serverName) {};
/**
* The server was removed from the cluster.
* @param serverName The remote servers name.
*/
default void serverRemoved(final ServerName serverName) {};
}