| /** |
| * 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; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.ScheduledChore; |
| import org.apache.yetus.audience.InterfaceAudience; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.hadoop.hbase.master.HMaster; |
| |
| /** |
| * Chore that will call HMaster.balance{@link org.apache.hadoop.hbase.master.HMaster#balance()} when |
| * needed. |
| */ |
| @InterfaceAudience.Private |
| public class BalancerChore extends ScheduledChore { |
| private static final Logger LOG = LoggerFactory.getLogger(BalancerChore.class); |
| |
| private final HMaster master; |
| |
| public BalancerChore(HMaster master) { |
| super(master.getServerName() + "-BalancerChore", master, master.getConfiguration().getInt( |
| HConstants.HBASE_BALANCER_PERIOD, HConstants.DEFAULT_HBASE_BALANCER_PERIOD)); |
| this.master = master; |
| } |
| |
| @Override |
| protected void chore() { |
| try { |
| master.balance(); |
| } catch (IOException e) { |
| LOG.error("Failed to balance.", e); |
| } |
| } |
| } |