| /* |
| * 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.jackrabbit.oak.plugins.blob; |
| |
| import java.io.Closeable; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.ScheduledExecutorService; |
| |
| import com.google.common.cache.AbstractCache; |
| import com.google.common.cache.CacheLoader; |
| |
| import com.google.common.util.concurrent.ListeningExecutorService; |
| import org.apache.jackrabbit.oak.stats.StatisticsProvider; |
| import org.jetbrains.annotations.Nullable; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| /** |
| */ |
| public class CompositeDataStoreCache extends AbstractCache<String, File> implements Closeable { |
| /** |
| * Logger instance. |
| */ |
| private static final Logger LOG = LoggerFactory.getLogger(CompositeDataStoreCache.class); |
| |
| /** |
| * Cache for downloaded blobs |
| */ |
| private final FileCache downloadCache; |
| |
| /** |
| * Cache for staging async uploads |
| */ |
| private final UploadStagingCache stagingCache; |
| |
| /** |
| * The directory where the files are created. |
| */ |
| private final File directory; |
| |
| public CompositeDataStoreCache(String path, File home, long size, int uploadSplitPercentage, |
| int uploadThreads, CacheLoader<String, InputStream> loader, final StagingUploader uploader, |
| StatisticsProvider statsProvider, ListeningExecutorService listeningExecutor, |
| ScheduledExecutorService scheduledExecutor /* purge scheduled executor */, |
| ExecutorService executor /* File cache executor */, |
| int purgeInterval /* async purge interval secs */, |
| int stagingRetryInterval /* async retry interval secs */) { |
| |
| checkArgument(uploadSplitPercentage >= 0 && uploadSplitPercentage < 100, |
| "Upload percentage should be between 0 and 100"); |
| |
| this.directory = new File(path); |
| |
| long uploadSize = (size * uploadSplitPercentage) / 100; |
| |
| this.stagingCache = UploadStagingCache |
| .build(directory, home, uploadThreads, uploadSize, uploader, null, statsProvider, |
| listeningExecutor, scheduledExecutor, purgeInterval, stagingRetryInterval); |
| this.downloadCache = FileCache.build((size - uploadSize), directory, loader, executor); |
| stagingCache.setDownloadCache(downloadCache); |
| } |
| |
| @Nullable |
| public File getIfPresent(String key) { |
| // Check if the file scheduled for async upload |
| File staged = stagingCache.getIfPresent(key); |
| if (staged != null && staged.exists()) { |
| return staged; |
| } |
| return downloadCache.getIfPresent(key); |
| } |
| |
| @Nullable |
| @Override |
| public File getIfPresent(Object key) { |
| return getIfPresent((String) key); |
| } |
| |
| public File get(String key) throws IOException { |
| try { |
| // Check if the file scheduled for async upload |
| File staged = stagingCache.getIfPresent(key); |
| if (staged != null && staged.exists()) { |
| return staged; |
| } |
| // get from cache and download if not available |
| return downloadCache.get(key); |
| } catch (IOException e) { |
| LOG.error("Error loading [{}] from cache", key); |
| throw e; |
| } |
| } |
| |
| @Override |
| public void invalidate(Object key) { |
| stagingCache.invalidate((String) key); |
| downloadCache.invalidate(key); |
| } |
| |
| public boolean stage(String key, File file) { |
| return stagingCache.put(key, file).isPresent(); |
| } |
| |
| |
| public DataStoreCacheStatsMBean getStagingCacheStats() { |
| return stagingCache.getStats(); |
| } |
| |
| public DataStoreCacheStatsMBean getCacheStats() { |
| return downloadCache.getStats(); |
| } |
| |
| @Override |
| public void close() { |
| downloadCache.close(); |
| stagingCache.close(); |
| } |
| |
| UploadStagingCache getStagingCache() { |
| return stagingCache; |
| } |
| |
| FileCache getDownloadCache() { |
| return downloadCache; |
| } |
| } |