/**
* 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.balancer;
/**
* This interface extends the basic metrics balancer source to add a function
* to report metrics that related to stochastic load balancer. The purpose is to
* offer an insight to the internal cost calculations that can be useful to tune
* the balancer. For details, refer to HBASE-13965
*/
public interface MetricsStochasticBalancerSource extends MetricsBalancerSource {
/**
* Updates the number of metrics reported to JMX
*/
public void updateMetricsSize(int size);
/**
* Reports stochastic load balancer costs to JMX
*/
public void updateStochasticCost(String tableName, String costFunctionName,
String costFunctionDesc, Double value);
}