| /** |
| * |
| * 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.normalizer; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.hbase.HRegionInfo; |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.hbase.client.Admin; |
| import org.apache.hadoop.hbase.master.normalizer.NormalizationPlan.PlanType; |
| |
| import java.io.IOException; |
| |
| /** |
| * Normalization plan to merge regions (smallest region in the table with its smallest neighbor). |
| */ |
| @InterfaceAudience.Private |
| public class MergeNormalizationPlan implements NormalizationPlan { |
| private static final Log LOG = LogFactory.getLog(MergeNormalizationPlan.class.getName()); |
| |
| private final HRegionInfo firstRegion; |
| private final HRegionInfo secondRegion; |
| |
| public MergeNormalizationPlan(HRegionInfo firstRegion, HRegionInfo secondRegion) { |
| this.firstRegion = firstRegion; |
| this.secondRegion = secondRegion; |
| } |
| |
| @Override |
| public PlanType getType() { |
| return PlanType.MERGE; |
| } |
| |
| HRegionInfo getFirstRegion() { |
| return firstRegion; |
| } |
| |
| HRegionInfo getSecondRegion() { |
| return secondRegion; |
| } |
| |
| @Override |
| public String toString() { |
| return "MergeNormalizationPlan{" + |
| "firstRegion=" + firstRegion + |
| ", secondRegion=" + secondRegion + |
| '}'; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void execute(Admin admin) { |
| LOG.info("Executing merging normalization plan: " + this); |
| try { |
| admin.mergeRegionsAsync(firstRegion.getEncodedNameAsBytes(), |
| secondRegion.getEncodedNameAsBytes(), true); |
| } catch (IOException ex) { |
| LOG.error("Error during region merge: ", ex); |
| } |
| } |
| } |