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/*
* 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.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import com.google.common.base.Predicate;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Maps;
import com.google.common.io.Files;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.apache.jackrabbit.oak.plugins.blob.DataStoreCacheUtils.recursiveDelete;
/**
* Utility methods to upgrade Old DataStore cache
* {@link org.apache.jackrabbit.core.data.CachingDataStore}.
*/
public class DataStoreCacheUpgradeUtils {
private static final Logger LOG = LoggerFactory.getLogger(DataStoreCacheUpgradeUtils.class);
static final String UPLOAD_MAP = "async-pending-uploads.ser";
static final String UPLOAD_STAGING_DIR = UploadStagingCache.UPLOAD_STAGING_DIR;
static final String DOWNLOAD_DIR = FileCache.DOWNLOAD_DIR;
/**
* De-serialize the pending uploads map from {@link org.apache.jackrabbit.core.data.AsyncUploadCache}.
*
* @param homeDir the directory where the serialized file is maintained
* @return the de-serialized map
*/
private static Map deSerializeUploadMap(File homeDir) {
Map asyncUploadMap = Maps.newHashMap();
File asyncUploadMapFile = new File(homeDir, UPLOAD_MAP);
if (asyncUploadMapFile.exists()) {
String path = asyncUploadMapFile.getAbsolutePath();
InputStream fis = null;
try {
fis = new BufferedInputStream(new FileInputStream(path));
ObjectInput input = new ObjectInputStream(fis);
asyncUploadMap = (Map) input.readObject();
} catch (Exception e) {
LOG.warn("Error in reading pending uploads map [{}] from location [{}]", UPLOAD_MAP,
homeDir);
} finally {
IOUtils.closeQuietly(fis);
}
LOG.debug("AsyncUploadMap read [{}]", asyncUploadMap);
}
return asyncUploadMap;
}
/**
* Delete the serialized pending uploads map from the file system.
*
* @param homeDir the repository home directory
*/
private static void deleteSerializedUploadMap(File homeDir) {
File uploadMap = new File(homeDir, UPLOAD_MAP);
FileUtils.deleteQuietly(uploadMap);
LOG.info("Deleted asyncUploadMap [{}] from [{}]", UPLOAD_MAP, homeDir);
}
private static boolean notInExceptions(File file, List exceptions) {
String parent = file.getParent();
for (String exception : exceptions) {
if (parent.contains(exception)) {
return true;
}
}
return false;
}
/**
* Move the DataStore downloaded cache files to the appropriate folder used by the new cache
* {@link FileCache}
* @param path the root of the datastore
*/
public static void moveDownloadCache(final File path) {
final List exceptions = ImmutableList.of("tmp", UPLOAD_STAGING_DIR, DOWNLOAD_DIR);
File newDownloadDir = new File(path, DOWNLOAD_DIR);
Iterator iterator =
Files.fileTreeTraverser().postOrderTraversal(path)
.filter(new Predicate() {
@Override public boolean apply(File input) {
return input.isFile()
&& !input.getParentFile().equals(path)
&& !notInExceptions(input, exceptions);
}
}).iterator();
while (iterator.hasNext()) {
File download = iterator.next();
LOG.trace("Download cache file absolute pre-upgrade path " + download);
File newDownload = new File(newDownloadDir,
download.getAbsolutePath().substring(path.getAbsolutePath().length()));
newDownload.getParentFile().mkdirs();
LOG.trace("Downloaded cache file absolute post-upgrade path " + newDownload);
try {
FileUtils.moveFile(download, newDownload);
LOG.info("Download cache file [{}] moved to [{}]", download, newDownload);
recursiveDelete(download, path);
} catch (Exception e) {
LOG.warn("Unable to move download cache file [{}] to [{}]", download, newDownload);
}
}
}
/**
* Move the pending uploads read from the de-serialized map to the appropriate directory
* used by the {@link UploadStagingCache}.
*
* @param homeDir the repository home directory
* @param path the root of the datastore
* @param deleteMap flag indicating whether to delete the pending upload map after upgrade
*/
public static void movePendingUploadsToStaging(File homeDir, File path, boolean deleteMap) {
File newUploadDir = new File(path, UPLOAD_STAGING_DIR);
if (homeDir != null && homeDir.exists()) {
Map pendingUploads = deSerializeUploadMap(homeDir);
Iterator pendingFileIter = pendingUploads.keySet().iterator();
while (pendingFileIter.hasNext()) {
String file = pendingFileIter.next();
File upload = new File(path, file);
LOG.trace("Pending upload absolute path " + upload.getAbsolutePath());
File newUpload = new File(newUploadDir, file);
LOG.trace("Pending upload upgrade absolute path " + newUpload.getAbsolutePath());
newUpload.getParentFile().mkdirs();
if (upload.exists()) {
LOG.trace(upload + " File exists");
try {
FileUtils.moveFile(upload, newUpload);
LOG.info("Pending upload file [{}] moved to [{}]", upload, newUpload);
recursiveDelete(upload, path);
} catch (Exception e) {
LOG.warn("Unable to move pending upload file [{}] to [{}]", upload,
newUpload);
}
} else {
LOG.warn("File [{}] does not exist", upload);
}
}
if (deleteMap) {
deleteSerializedUploadMap(homeDir);
}
}
}
/**
* Upgrades the {@link org.apache.jackrabbit.core.data.CachingDataStore}.
*
* @param homeDir the repository home directory
* @param path the root of the datastore
* @param moveCache flag whether to move the downloaded cache files
* @param deleteMap flag indicating whether to delete the pending upload map after upgrade
*/
public static void upgrade(File homeDir, File path, boolean moveCache, boolean deleteMap) {
movePendingUploadsToStaging(homeDir, path, deleteMap);
if (moveCache) {
moveDownloadCache(path);
}
}
}
