| /* |
| * 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.geode.internal.cache.partitioned.rebalance; |
| |
| import org.apache.logging.log4j.Logger; |
| |
| import org.apache.geode.internal.cache.partitioned.rebalance.model.BucketRollup; |
| import org.apache.geode.internal.cache.partitioned.rebalance.model.Member; |
| import org.apache.geode.internal.cache.partitioned.rebalance.model.Move; |
| import org.apache.geode.internal.cache.partitioned.rebalance.model.PartitionedRegionLoadModel; |
| import org.apache.geode.logging.internal.log4j.api.LogService; |
| |
| /** |
| * A director to remove copies of buckets when the bucket exceeds the redundancy level. This is most |
| * commonly used as an element of the composite director. |
| * |
| */ |
| public class RemoveOverRedundancy extends RebalanceDirectorAdapter { |
| |
| private static final Logger logger = LogService.getLogger(); |
| |
| private PartitionedRegionLoadModel model; |
| |
| |
| @Override |
| public void initialize(PartitionedRegionLoadModel model) { |
| this.model = model; |
| |
| } |
| |
| @Override |
| public void membershipChanged(PartitionedRegionLoadModel model) { |
| initialize(model); |
| } |
| |
| @Override |
| public boolean nextStep() { |
| return removeOverRedundancy(); |
| } |
| |
| /** |
| * Remove copies of buckets that have more than the expected number of redundant copies. |
| */ |
| private boolean removeOverRedundancy() { |
| Move bestMove = null; |
| BucketRollup first = null; |
| while (bestMove == null) { |
| if (model.getOverRedundancyBuckets().isEmpty()) { |
| return false; |
| } |
| |
| first = model.getOverRedundancyBuckets().first(); |
| bestMove = model.findBestRemove(first); |
| if (bestMove == null) { |
| if (logger.isDebugEnabled()) { |
| logger.debug( |
| "Skipping overredundancy bucket {} because couldn't find a member to remove from?", |
| first); |
| } |
| model.ignoreOverRedundancyBucket(first); |
| } |
| } |
| Member targetMember = bestMove.getTarget(); |
| |
| model.remoteOverRedundancyBucket(first, targetMember); |
| |
| return true; |
| } |
| } |