| /* |
| * 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.index.lucene.directory; |
| |
| import java.io.IOException; |
| |
| import org.apache.jackrabbit.oak.commons.IOUtils; |
| import org.apache.lucene.store.Directory; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Checks that all files in local which are present in remote have same file length. |
| * If there is a size mismatch in any one of the file then whole of local index content |
| * would be purged |
| */ |
| public class IndexSanityChecker { |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| private final Directory local; |
| private final Directory remote; |
| private final String indexPath; |
| private int localFileCount; |
| private int remoteFileCount; |
| private long localDirSize; |
| private long remoteDirSize; |
| |
| public IndexSanityChecker(String indexPath, Directory local, Directory remote) { |
| this.local = local; |
| this.remote = remote; |
| this.indexPath = indexPath; |
| } |
| |
| public boolean check() throws IOException { |
| boolean allFine = true; |
| //TODO Add support for checksum based checks |
| if (isThereASizeMismatch()){ |
| //In case of any mismatch just purge all local files |
| deleteAllFiles(local); |
| allFine = false; |
| } else { |
| //Remove local files which are not found in remote |
| for (String fileName : local.listAll()) { |
| if (!remote.fileExists(fileName)) { |
| local.deleteFile(fileName); |
| } |
| } |
| } |
| |
| if (allFine) { |
| log.info("Local index directory content found to be valid for index [{}]. " + |
| "Stats Local: {} files ({}), Remote: {} files ({})", indexPath, |
| localFileCount, IOUtils.humanReadableByteCount(localDirSize), |
| remoteFileCount, IOUtils.humanReadableByteCount(remoteDirSize)); |
| } else { |
| log.warn("Local index directory content were not found to be in sync with remote for index [{}]. " + |
| "Local directory content has been purged and would be synced again from remote", indexPath); |
| } |
| return allFine; |
| } |
| |
| private boolean isThereASizeMismatch() throws IOException { |
| for (String fileName : remote.listAll()){ |
| long localLength = DirectoryUtils.getFileLength(local, fileName); |
| long remoteLength = remote.fileLength(fileName); |
| |
| //This is a weak check based on length. |
| if (localLength > 0 && localLength != remoteLength){ |
| log.warn("[{}] Found local copy for {} in {} but size of local {} differs from remote {}. ", |
| indexPath, fileName, local, localLength, remoteLength); |
| return true; |
| } |
| |
| if (localLength > 0) { |
| localDirSize += localLength; |
| localFileCount++; |
| } |
| |
| remoteDirSize += remoteLength; |
| remoteFileCount++; |
| } |
| return false; |
| } |
| |
| private static void deleteAllFiles(Directory dir) throws IOException { |
| for (String fileName : dir.listAll()){ |
| dir.deleteFile(fileName); |
| } |
| } |
| } |