| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.hadoop.ozone.om.request.file; |
| |
| import java.io.IOException; |
| import java.nio.file.Path; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import com.google.common.base.Optional; |
| import org.apache.hadoop.hdds.utils.db.cache.CacheKey; |
| import org.apache.hadoop.hdds.utils.db.cache.CacheValue; |
| import org.apache.hadoop.ozone.OzoneAcl; |
| import org.apache.hadoop.ozone.om.OMMetadataManager; |
| import org.apache.hadoop.ozone.om.helpers.OmKeyInfo; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import javax.annotation.Nonnull; |
| |
| |
| /** |
| * Base class for file requests. |
| */ |
| public final class OMFileRequest { |
| |
| private static final Logger LOG = |
| LoggerFactory.getLogger(OMFileRequest.class); |
| |
| private OMFileRequest() { |
| } |
| /** |
| * Verify any files exist in the given path in the specified volume/bucket. |
| * @param omMetadataManager |
| * @param volumeName |
| * @param bucketName |
| * @param keyPath |
| * @return true - if file exist in the given path, else false. |
| * @throws IOException |
| */ |
| public static OMPathInfo verifyFilesInPath( |
| @Nonnull OMMetadataManager omMetadataManager, |
| @Nonnull String volumeName, |
| @Nonnull String bucketName, @Nonnull String keyName, |
| @Nonnull Path keyPath) throws IOException { |
| |
| String fileNameFromDetails = omMetadataManager.getOzoneKey(volumeName, |
| bucketName, keyName); |
| String dirNameFromDetails = omMetadataManager.getOzoneDirKey(volumeName, |
| bucketName, keyName); |
| List<String> missing = new ArrayList<>(); |
| List<OzoneAcl> inheritAcls = new ArrayList<>(); |
| OMDirectoryResult result = OMDirectoryResult.NONE; |
| |
| while (keyPath != null) { |
| String pathName = keyPath.toString(); |
| |
| String dbKeyName = omMetadataManager.getOzoneKey(volumeName, |
| bucketName, pathName); |
| String dbDirKeyName = omMetadataManager.getOzoneDirKey(volumeName, |
| bucketName, pathName); |
| |
| if (omMetadataManager.getKeyTable().isExist(dbKeyName)) { |
| // Found a file in the given path. |
| // Check if this is actual file or a file in the given path |
| if (dbKeyName.equals(fileNameFromDetails)) { |
| result = OMDirectoryResult.FILE_EXISTS; |
| } else { |
| result = OMDirectoryResult.FILE_EXISTS_IN_GIVENPATH; |
| } |
| } else if (omMetadataManager.getKeyTable().isExist(dbDirKeyName)) { |
| // Found a directory in the given path. |
| // Check if this is actual directory or a directory in the given path |
| if (dbDirKeyName.equals(dirNameFromDetails)) { |
| result = OMDirectoryResult.DIRECTORY_EXISTS; |
| } else { |
| result = OMDirectoryResult.DIRECTORY_EXISTS_IN_GIVENPATH; |
| inheritAcls = omMetadataManager.getKeyTable().get(dbDirKeyName) |
| .getAcls(); |
| LOG.trace("Acls inherited from parent " + dbDirKeyName + " are : " |
| + inheritAcls); |
| } |
| } else { |
| if (!dbDirKeyName.equals(dirNameFromDetails)) { |
| missing.add(keyPath.toString()); |
| } |
| } |
| |
| if (result != OMDirectoryResult.NONE) { |
| |
| LOG.trace("verifyFiles in Path : " + "/" + volumeName |
| + "/" + bucketName + "/" + keyName + ":" + result); |
| return new OMPathInfo(missing, result, inheritAcls); |
| } |
| keyPath = keyPath.getParent(); |
| } |
| |
| if (inheritAcls.isEmpty()) { |
| String bucketKey = omMetadataManager.getBucketKey(volumeName, |
| bucketName); |
| inheritAcls = omMetadataManager.getBucketTable().get(bucketKey) |
| .getAcls(); |
| LOG.trace("Acls inherited from bucket " + bucketName + " are : " |
| + inheritAcls); |
| } |
| |
| LOG.trace("verifyFiles in Path : " + volumeName + "/" + bucketName + "/" |
| + keyName + ":" + result); |
| // Found no files/ directories in the given path. |
| return new OMPathInfo(missing, OMDirectoryResult.NONE, inheritAcls); |
| } |
| |
| /** |
| * Class to return the results from verifyFilesInPath. |
| * Includes the list of missing intermediate directories and |
| * the directory search result code. |
| */ |
| public static class OMPathInfo { |
| private OMDirectoryResult directoryResult; |
| private List<String> missingParents; |
| private List<OzoneAcl> acls; |
| |
| public OMPathInfo(List missingParents, OMDirectoryResult result, |
| List<OzoneAcl> aclList) { |
| this.missingParents = missingParents; |
| this.directoryResult = result; |
| this.acls = aclList; |
| } |
| |
| public List getMissingParents() { |
| return missingParents; |
| } |
| |
| public OMDirectoryResult getDirectoryResult() { |
| return directoryResult; |
| } |
| |
| public List<OzoneAcl> getAcls() { |
| return acls; |
| } |
| |
| /** |
| * indicates if the immediate parent in the path already exists. |
| * @return true indicates the parent exists |
| */ |
| public boolean directParentExists() { |
| return missingParents.isEmpty(); |
| } |
| } |
| |
| /** |
| * Return codes used by verifyFilesInPath method. |
| */ |
| public enum OMDirectoryResult { |
| |
| // In below examples path is assumed as "a/b/c" in volume volume1 and |
| // bucket b1. |
| |
| // When a directory exists in given path. |
| // If we have a directory with name "a/b" we return this enum value. |
| DIRECTORY_EXISTS_IN_GIVENPATH, |
| |
| // When a file exists in given path. |
| // If we have a file with name "a/b" we return this enum value. |
| FILE_EXISTS_IN_GIVENPATH, |
| |
| // When file already exists with the given path. |
| // If we have a file with name "a/b/c" we return this enum value. |
| FILE_EXISTS, |
| |
| // When directory exists with the given path. |
| // If we have a file with name "a/b/c" we return this enum value. |
| DIRECTORY_EXISTS, |
| |
| // If no file/directory exists with the given path. |
| // If we don't have any file/directory name with "a/b/c" or any |
| // sub-directory or file name from the given path we return this enum value. |
| NONE |
| } |
| |
| /** |
| * Add entries to the Key Table cache. |
| * @param omMetadataManager |
| * @param volumeName |
| * @param bucketName |
| * @param keyInfo |
| * @param parentInfoList |
| * @param index |
| * |
| * TODO : move code to a separate utility class. |
| */ |
| public static void addKeyTableCacheEntries( |
| OMMetadataManager omMetadataManager, String volumeName, |
| String bucketName, Optional<OmKeyInfo> keyInfo, |
| Optional<List<OmKeyInfo>> parentInfoList, |
| long index) { |
| for (OmKeyInfo parentInfo : parentInfoList.get()) { |
| omMetadataManager.getKeyTable().addCacheEntry( |
| new CacheKey<>(omMetadataManager.getOzoneKey(volumeName, bucketName, |
| parentInfo.getKeyName())), |
| new CacheValue<>(Optional.of(parentInfo), index)); |
| } |
| |
| if (keyInfo.isPresent()) { |
| omMetadataManager.getKeyTable().addCacheEntry( |
| new CacheKey<>(omMetadataManager.getOzoneKey(volumeName, bucketName, |
| keyInfo.get().getKeyName())), |
| new CacheValue<>(keyInfo, index)); |
| } |
| } |
| } |