| /* |
| * 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.eviction; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.logging.log4j.Logger; |
| |
| import org.apache.geode.cache.RegionDestroyedException; |
| import org.apache.geode.internal.cache.CachePerfStats; |
| import org.apache.geode.internal.cache.LocalRegion; |
| import org.apache.geode.internal.logging.LogService; |
| |
| /** |
| * Takes delta to be evicted and tries to evict the least no of LRU entry which would make |
| * evictedBytes more than or equal to the delta |
| * |
| * @since GemFire 6.0 |
| */ |
| public class RegionEvictorTask implements Runnable { |
| |
| private static final Logger logger = LogService.getLogger(); |
| |
| private final CachePerfStats stats; |
| |
| private final List<LocalRegion> regions; |
| |
| private final HeapEvictor evictor; |
| |
| private final long bytesToEvictPerTask; |
| |
| RegionEvictorTask(final CachePerfStats stats, final List<LocalRegion> regions, |
| final HeapEvictor evictor, final long bytesToEvictPerTask) { |
| this.stats = stats; |
| this.evictor = evictor; |
| this.regions = regions; |
| this.bytesToEvictPerTask = bytesToEvictPerTask; |
| } |
| |
| List<LocalRegion> getRegionList() { |
| synchronized (this.regions) { |
| return this.regions; |
| } |
| } |
| |
| private HeapEvictor getHeapEvictor() { |
| return this.evictor; |
| } |
| |
| @Override |
| public void run() { |
| this.stats.incEvictorJobsStarted(); |
| try { |
| long totalBytesEvicted = 0; |
| while (true) { |
| final long start = CachePerfStats.getStatTime(); |
| synchronized (this.regions) { |
| if (this.regions.isEmpty()) { |
| return; |
| } |
| // consider trying Fisher-Yates shuffle algorithm |
| for (Iterator<LocalRegion> iterator = regions.iterator(); iterator.hasNext();) { |
| LocalRegion region = iterator.next(); |
| try { |
| long bytesEvicted = region.getRegionMap().centralizedLruUpdateCallback(); |
| if (bytesEvicted == 0) { |
| iterator.remove(); |
| } |
| totalBytesEvicted += bytesEvicted; |
| if (totalBytesEvicted >= bytesToEvictPerTask || !getHeapEvictor().mustEvict() |
| || this.regions.isEmpty()) { |
| return; |
| } |
| } catch (RegionDestroyedException e) { |
| region.getCache().getCancelCriterion().checkCancelInProgress(e); |
| } catch (RuntimeException e) { |
| region.getCache().getCancelCriterion().checkCancelInProgress(e); |
| logger.warn(String.format("Exception: %s occurred during eviction ", |
| new Object[] {e.getMessage()}), e); |
| } finally { |
| long end = CachePerfStats.getStatTime(); |
| this.stats.incEvictWorkTime(end - start); |
| } |
| } |
| } |
| } |
| } finally { |
| this.stats.incEvictorJobsCompleted(); |
| } |
| } |
| } |