| /* |
| * 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.solr.handler; |
| |
| import java.lang.invoke.MethodHandles; |
| import java.net.URI; |
| import java.text.SimpleDateFormat; |
| import java.util.Date; |
| import java.util.Locale; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.Future; |
| |
| import org.apache.lucene.codecs.CodecUtil; |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.store.IOContext; |
| import org.apache.lucene.store.IndexInput; |
| import org.apache.solr.common.SolrException; |
| import org.apache.solr.core.DirectoryFactory; |
| import org.apache.solr.core.SolrCore; |
| import org.apache.solr.core.backup.repository.BackupRepository; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class RestoreCore implements Callable<Boolean> { |
| |
| private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| |
| private final String backupName; |
| private final URI backupLocation; |
| private final SolrCore core; |
| private final BackupRepository backupRepo; |
| |
| public RestoreCore(BackupRepository backupRepo, SolrCore core, URI location, String name) { |
| this.backupRepo = backupRepo; |
| this.core = core; |
| this.backupLocation = location; |
| this.backupName = name; |
| } |
| |
| @Override |
| public Boolean call() throws Exception { |
| return doRestore(); |
| } |
| |
| public boolean doRestore() throws Exception { |
| |
| URI backupPath = backupRepo.resolve(backupLocation, backupName); |
| SimpleDateFormat dateFormat = new SimpleDateFormat(SnapShooter.DATE_FMT, Locale.ROOT); |
| String restoreIndexName = "restore." + dateFormat.format(new Date()); |
| String restoreIndexPath = core.getDataDir() + restoreIndexName; |
| |
| String indexDirPath = core.getIndexDir(); |
| Directory restoreIndexDir = null; |
| Directory indexDir = null; |
| try { |
| |
| restoreIndexDir = core.getDirectoryFactory().get(restoreIndexPath, |
| DirectoryFactory.DirContext.DEFAULT, core.getSolrConfig().indexConfig.lockType); |
| |
| //Prefer local copy. |
| indexDir = core.getDirectoryFactory().get(indexDirPath, |
| DirectoryFactory.DirContext.DEFAULT, core.getSolrConfig().indexConfig.lockType); |
| |
| //Move all files from backupDir to restoreIndexDir |
| for (String filename : backupRepo.listAll(backupPath)) { |
| checkInterrupted(); |
| log.info("Copying file {} to restore directory ", filename); |
| try (IndexInput indexInput = backupRepo.openInput(backupPath, filename, IOContext.READONCE)) { |
| Long checksum = null; |
| try { |
| checksum = CodecUtil.retrieveChecksum(indexInput); |
| } catch (Exception e) { |
| log.warn("Could not read checksum from index file: {}", filename, e); |
| } |
| long length = indexInput.length(); |
| IndexFetcher.CompareResult compareResult = IndexFetcher.compareFile(indexDir, filename, length, checksum); |
| if (!compareResult.equal || |
| (IndexFetcher.filesToAlwaysDownloadIfNoChecksums(filename, length, compareResult))) { |
| backupRepo.copyFileTo(backupPath, filename, restoreIndexDir); |
| } else { |
| //prefer local copy |
| restoreIndexDir.copyFrom(indexDir, filename, filename, IOContext.READONCE); |
| } |
| } catch (Exception e) { |
| log.warn("Exception while restoring the backup index ", e); |
| throw new SolrException(SolrException.ErrorCode.UNKNOWN, "Exception while restoring the backup index", e); |
| } |
| } |
| log.debug("Switching directories"); |
| core.modifyIndexProps(restoreIndexName); |
| |
| boolean success; |
| try { |
| core.getUpdateHandler().newIndexWriter(false); |
| openNewSearcher(); |
| success = true; |
| log.info("Successfully restored to the backup index"); |
| } catch (Exception e) { |
| //Rollback to the old index directory. Delete the restore index directory and mark the restore as failed. |
| log.warn("Could not switch to restored index. Rolling back to the current index", e); |
| Directory dir = null; |
| try { |
| dir = core.getDirectoryFactory().get(core.getDataDir(), DirectoryFactory.DirContext.META_DATA, |
| core.getSolrConfig().indexConfig.lockType); |
| dir.deleteFile(IndexFetcher.INDEX_PROPERTIES); |
| } finally { |
| if (dir != null) { |
| core.getDirectoryFactory().release(dir); |
| } |
| } |
| |
| core.getDirectoryFactory().doneWithDirectory(restoreIndexDir); |
| core.getDirectoryFactory().remove(restoreIndexDir); |
| core.getUpdateHandler().newIndexWriter(false); |
| openNewSearcher(); |
| throw new SolrException(SolrException.ErrorCode.UNKNOWN, "Exception while restoring the backup index", e); |
| } |
| if (success) { |
| core.getDirectoryFactory().doneWithDirectory(indexDir); |
| // Cleanup all index files not associated with any *named* snapshot. |
| core.deleteNonSnapshotIndexFiles(indexDirPath); |
| } |
| |
| return true; |
| } finally { |
| if (restoreIndexDir != null) { |
| core.getDirectoryFactory().release(restoreIndexDir); |
| } |
| if (indexDir != null) { |
| core.getDirectoryFactory().release(indexDir); |
| } |
| } |
| } |
| |
| private void checkInterrupted() throws InterruptedException { |
| if (Thread.currentThread().isInterrupted()) { |
| throw new InterruptedException("Stopping restore process. Thread was interrupted."); |
| } |
| } |
| |
| private void openNewSearcher() throws Exception { |
| @SuppressWarnings({"rawtypes"}) |
| Future[] waitSearcher = new Future[1]; |
| core.getSearcher(true, false, waitSearcher, true); |
| if (waitSearcher[0] != null) { |
| waitSearcher[0].get(); |
| } |
| } |
| } |