hadoop OBSCommonUtils 源码
haddop OBSCommonUtils 代码
文件路径：/hadoop-cloud-storage-project/hadoop-huaweicloud/src/main/java/org/apache/hadoop/fs/obs/OBSCommonUtils.java
/*
* 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.hadoop.fs.obs;
import org.apache.hadoop.util.Preconditions;
import com.obs.services.ObsClient;
import com.obs.services.exception.ObsException;
import com.obs.services.model.AbortMultipartUploadRequest;
import com.obs.services.model.DeleteObjectsRequest;
import com.obs.services.model.DeleteObjectsResult;
import com.obs.services.model.KeyAndVersion;
import com.obs.services.model.ListMultipartUploadsRequest;
import com.obs.services.model.ListObjectsRequest;
import com.obs.services.model.MultipartUpload;
import com.obs.services.model.MultipartUploadListing;
import com.obs.services.model.ObjectListing;
import com.obs.services.model.ObjectMetadata;
import com.obs.services.model.ObsObject;
import com.obs.services.model.PutObjectRequest;
import com.obs.services.model.PutObjectResult;
import com.obs.services.model.UploadPartRequest;
import com.obs.services.model.UploadPartResult;
import com.obs.services.model.fs.FSStatusEnum;
import com.obs.services.model.fs.GetAttributeRequest;
import com.obs.services.model.fs.GetBucketFSStatusRequest;
import com.obs.services.model.fs.GetBucketFSStatusResult;
import com.obs.services.model.fs.ObsFSAttribute;
import com.obs.services.model.fs.WriteFileRequest;
import org.apache.commons.lang3.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileAlreadyExistsException;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.InvalidRequestException;
import org.apache.hadoop.fs.LocatedFileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathIOException;
import org.apache.hadoop.security.ProviderUtils;
import org.apache.hadoop.util.Lists;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.EOFException;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.nio.file.AccessDeniedException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
/**
* Common utils for {@link OBSFileSystem}.
*/
final class OBSCommonUtils {
/**
* Class logger.
*/
private static final Logger LOG = LoggerFactory.getLogger(
OBSCommonUtils.class);
/**
* Moved permanently response code.
*/
static final int MOVED_PERMANENTLY_CODE = 301;
/**
* Unauthorized response code.
*/
static final int UNAUTHORIZED_CODE = 401;
/**
* Forbidden response code.
*/
static final int FORBIDDEN_CODE = 403;
/**
* Not found response code.
*/
static final int NOT_FOUND_CODE = 404;
/**
* File conflict.
*/
static final int CONFLICT_CODE = 409;
/**
* Gone response code.
*/
static final int GONE_CODE = 410;
/**
* EOF response code.
*/
static final int EOF_CODE = 416;
/**
* Core property for provider path. Duplicated here for consistent code across
* Hadoop version: {@value}.
*/
static final String CREDENTIAL_PROVIDER_PATH
= "hadoop.security.credential.provider.path";
/**
* Max number of retry times.
*/
static final int MAX_RETRY_TIME = 3;
/**
* Delay time between two retries.
*/
static final int DELAY_TIME = 10;
/**
* Max number of listing keys for checking folder empty.
*/
static final int MAX_KEYS_FOR_CHECK_FOLDER_EMPTY = 3;
/**
* Max number of listing keys for checking folder empty.
*/
static final int BYTE_TO_INT_MASK = 0xFF;
private OBSCommonUtils() {
}
/**
* Get the fs status of the bucket.
*
* @param obs OBS client instance
* @param bucketName bucket name
* @return boolean value indicating if this bucket is a posix bucket
* @throws FileNotFoundException the bucket is absent
* @throws IOException any other problem talking to OBS
*/
static boolean getBucketFsStatus(final ObsClient obs,
final String bucketName)
throws FileNotFoundException, IOException {
try {
GetBucketFSStatusRequest getBucketFsStatusRequest
= new GetBucketFSStatusRequest();
getBucketFsStatusRequest.setBucketName(bucketName);
GetBucketFSStatusResult getBucketFsStatusResult =
obs.getBucketFSStatus(getBucketFsStatusRequest);
FSStatusEnum fsStatus = getBucketFsStatusResult.getStatus();
return fsStatus == FSStatusEnum.ENABLED;
} catch (ObsException e) {
LOG.error(e.toString());
throw translateException("getBucketFsStatus", bucketName, e);
}
}
/**
* Turns a path (relative or otherwise) into an OBS key.
*
* @param owner the owner OBSFileSystem instance
* @param path input path, may be relative to the working dir
* @return a key excluding the leading "/", or, if it is the root path, ""
*/
static String pathToKey(final OBSFileSystem owner, final Path path) {
Path absolutePath = path;
if (!path.isAbsolute()) {
absolutePath = new Path(owner.getWorkingDirectory(), path);
}
if (absolutePath.toUri().getScheme() != null && absolutePath.toUri()
.getPath()
.isEmpty()) {
return "";
}
return absolutePath.toUri().getPath().substring(1);
}
/**
* Turns a path (relative or otherwise) into an OBS key, adding a trailing "/"
* if the path is not the root <i>and</i> does not already have a "/" at the
* end.
*
* @param key obs key or ""
* @return the with a trailing "/", or, if it is the root key, "",
*/
static String maybeAddTrailingSlash(final String key) {
if (!StringUtils.isEmpty(key) && !key.endsWith("/")) {
return key + '/';
} else {
return key;
}
}
/**
* Convert a path back to a key.
*
* @param key input key
* @return the path from this key
*/
static Path keyToPath(final String key) {
return new Path("/" + key);
}
/**
* Convert a key to a fully qualified path.
*
* @param owner the owner OBSFileSystem instance
* @param key input key
* @return the fully qualified path including URI scheme and bucket name.
*/
static Path keyToQualifiedPath(final OBSFileSystem owner,
final String key) {
return qualify(owner, keyToPath(key));
}
/**
* Qualify a path.
*
* @param owner the owner OBSFileSystem instance
* @param path path to qualify
* @return a qualified path.
*/
static Path qualify(final OBSFileSystem owner, final Path path) {
return path.makeQualified(owner.getUri(), owner.getWorkingDirectory());
}
/**
* Delete obs key started '/'.
*
* @param key object key
* @return new key
*/
static String maybeDeleteBeginningSlash(final String key) {
return !StringUtils.isEmpty(key) && key.startsWith("/") ? key.substring(
1) : key;
}
/**
* Add obs key started '/'.
*
* @param key object key
* @return new key
*/
static String maybeAddBeginningSlash(final String key) {
return !StringUtils.isEmpty(key) && !key.startsWith("/")
? "/" + key
: key;
}
/**
* Translate an exception raised in an operation into an IOException. HTTP
* error codes are examined and can be used to build a more specific
* response.
*
* @param operation operation
* @param path path operated on (may be null)
* @param exception obs exception raised
* @return an IOE which wraps the caught exception.
*/
static IOException translateException(
final String operation, final String path,
final ObsException exception) {
String message = String.format("%s%s: status [%d] - request id [%s] "
+ "- error code [%s] - error message [%s] - trace :%s ",
operation, path != null ? " on " + path : "",
exception.getResponseCode(), exception.getErrorRequestId(),
exception.getErrorCode(),
exception.getErrorMessage(), exception);
IOException ioe;
int status = exception.getResponseCode();
switch (status) {
case MOVED_PERMANENTLY_CODE:
message =
String.format("Received permanent redirect response, "
+ "status [%d] - request id [%s] - "
+ "error code [%s] - message [%s]",
exception.getResponseCode(),
exception.getErrorRequestId(), exception.getErrorCode(),
exception.getErrorMessage());
ioe = new OBSIOException(message, exception);
break;
// permissions
case UNAUTHORIZED_CODE:
case FORBIDDEN_CODE:
ioe = new AccessDeniedException(path, null, message);
ioe.initCause(exception);
break;
// the object isn't there
case NOT_FOUND_CODE:
case GONE_CODE:
ioe = new FileNotFoundException(message);
ioe.initCause(exception);
break;
// out of range. This may happen if an object is overwritten with
// a shorter one while it is being read.
case EOF_CODE:
ioe = new EOFException(message);
break;
default:
// no specific exit code. Choose an IOE subclass based on the
// class
// of the caught exception
ioe = new OBSIOException(message, exception);
break;
}
return ioe;
}
/**
* Reject any request to delete an object where the key is root.
*
* @param bucket bucket name
* @param key key to validate
* @throws InvalidRequestException if the request was rejected due to a
* mistaken attempt to delete the root
* directory.
*/
static void blockRootDelete(final String bucket, final String key)
throws InvalidRequestException {
if (key.isEmpty() || "/".equals(key)) {
throw new InvalidRequestException(
"Bucket " + bucket + " cannot be deleted");
}
}
/**
* Delete an object. Increments the {@code OBJECT_DELETE_REQUESTS} and write
* operation statistics.
*
* @param owner the owner OBSFileSystem instance
* @param key key to blob to delete.
* @throws IOException on any failure to delete object
*/
static void deleteObject(final OBSFileSystem owner, final String key)
throws IOException {
blockRootDelete(owner.getBucket(), key);
ObsException lastException = null;
for (int retryTime = 1; retryTime <= MAX_RETRY_TIME; retryTime++) {
try {
owner.getObsClient().deleteObject(owner.getBucket(), key);
owner.getSchemeStatistics().incrementWriteOps(1);
return;
} catch (ObsException e) {
lastException = e;
LOG.warn("Delete path failed with [{}], "
+ "retry time [{}] - request id [{}] - "
+ "error code [{}] - error message [{}]",
e.getResponseCode(), retryTime, e.getErrorRequestId(),
e.getErrorCode(), e.getErrorMessage());
if (retryTime < MAX_RETRY_TIME) {
try {
Thread.sleep(DELAY_TIME);
} catch (InterruptedException ie) {
throw translateException("delete", key, e);
}
}
}
}
throw translateException(
String.format("retry max times [%s] delete failed", MAX_RETRY_TIME),
key, lastException);
}
/**
* Perform a bulk object delete operation. Increments the {@code
* OBJECT_DELETE_REQUESTS} and write operation statistics.
*
* @param owner the owner OBSFileSystem instance
* @param deleteRequest keys to delete on the obs-backend
* @throws IOException on any failure to delete objects
*/
static void deleteObjects(final OBSFileSystem owner,
final DeleteObjectsRequest deleteRequest) throws IOException {
DeleteObjectsResult result;
deleteRequest.setQuiet(true);
try {
result = owner.getObsClient().deleteObjects(deleteRequest);
owner.getSchemeStatistics().incrementWriteOps(1);
} catch (ObsException e) {
LOG.warn("delete objects failed, request [{}], request id [{}] - "
+ "error code [{}] - error message [{}]",
deleteRequest, e.getErrorRequestId(), e.getErrorCode(),
e.getErrorMessage());
for (KeyAndVersion keyAndVersion
: deleteRequest.getKeyAndVersionsList()) {
deleteObject(owner, keyAndVersion.getKey());
}
return;
}
// delete one by one if there is errors
if (result != null) {
List<DeleteObjectsResult.ErrorResult> errorResults
= result.getErrorResults();
if (!errorResults.isEmpty()) {
LOG.warn("bulk delete {} objects, {} failed, begin to delete "
+ "one by one.",
deleteRequest.getKeyAndVersionsList().size(),
errorResults.size());
for (DeleteObjectsResult.ErrorResult errorResult
: errorResults) {
deleteObject(owner, errorResult.getObjectKey());
}
}
}
}
/**
* Create a putObject request. Adds the ACL and metadata
*
* @param owner the owner OBSFileSystem instance
* @param key key of object
* @param metadata metadata header
* @param srcfile source file
* @return the request
*/
static PutObjectRequest newPutObjectRequest(final OBSFileSystem owner,
final String key, final ObjectMetadata metadata, final File srcfile) {
Preconditions.checkNotNull(srcfile);
PutObjectRequest putObjectRequest = new PutObjectRequest(
owner.getBucket(), key, srcfile);
putObjectRequest.setAcl(owner.getCannedACL());
putObjectRequest.setMetadata(metadata);
if (owner.getSse().isSseCEnable()) {
putObjectRequest.setSseCHeader(owner.getSse().getSseCHeader());
} else if (owner.getSse().isSseKmsEnable()) {
putObjectRequest.setSseKmsHeader(owner.getSse().getSseKmsHeader());
}
return putObjectRequest;
}
/**
* Create a {@link PutObjectRequest} request. The metadata is assumed to have
* been configured with the size of the operation.
*
* @param owner the owner OBSFileSystem instance
* @param key key of object
* @param metadata metadata header
* @param inputStream source data.
* @return the request
*/
static PutObjectRequest newPutObjectRequest(final OBSFileSystem owner,
final String key, final ObjectMetadata metadata,
final InputStream inputStream) {
Preconditions.checkNotNull(inputStream);
PutObjectRequest putObjectRequest = new PutObjectRequest(
owner.getBucket(), key, inputStream);
putObjectRequest.setAcl(owner.getCannedACL());
putObjectRequest.setMetadata(metadata);
if (owner.getSse().isSseCEnable()) {
putObjectRequest.setSseCHeader(owner.getSse().getSseCHeader());
} else if (owner.getSse().isSseKmsEnable()) {
putObjectRequest.setSseKmsHeader(owner.getSse().getSseKmsHeader());
}
return putObjectRequest;
}
/**
* PUT an object directly (i.e. not via the transfer manager). Byte length is
* calculated from the file length, or, if there is no file, from the content
* length of the header. <i>Important: this call will close any input stream
* in the request.</i>
*
* @param owner the owner OBSFileSystem instance
* @param putObjectRequest the request
* @return the upload initiated
* @throws ObsException on problems
*/
static PutObjectResult putObjectDirect(final OBSFileSystem owner,
final PutObjectRequest putObjectRequest) throws ObsException {
long len;
if (putObjectRequest.getFile() != null) {
len = putObjectRequest.getFile().length();
} else {
len = putObjectRequest.getMetadata().getContentLength();
}
PutObjectResult result = owner.getObsClient()
.putObject(putObjectRequest);
owner.getSchemeStatistics().incrementWriteOps(1);
owner.getSchemeStatistics().incrementBytesWritten(len);
return result;
}
/**
* Upload part of a multi-partition file. Increments the write and put
* counters. <i>Important: this call does not close any input stream in the
* request.</i>
*
* @param owner the owner OBSFileSystem instance
* @param request request
* @return the result of the operation.
* @throws ObsException on problems
*/
static UploadPartResult uploadPart(final OBSFileSystem owner,
final UploadPartRequest request) throws ObsException {
long len = request.getPartSize();
UploadPartResult uploadPartResult = owner.getObsClient()
.uploadPart(request);
owner.getSchemeStatistics().incrementWriteOps(1);
owner.getSchemeStatistics().incrementBytesWritten(len);
return uploadPartResult;
}
static void removeKeys(final OBSFileSystem owner,
final List<KeyAndVersion> keysToDelete, final boolean clearKeys,
final boolean checkRootDelete) throws IOException {
if (keysToDelete.isEmpty()) {
// exit fast if there are no keys to delete
return;
}
if (checkRootDelete) {
for (KeyAndVersion keyVersion : keysToDelete) {
blockRootDelete(owner.getBucket(), keyVersion.getKey());
}
}
if (!owner.isEnableMultiObjectDelete()
|| keysToDelete.size() < owner.getMultiDeleteThreshold()) {
// delete one by one.
for (KeyAndVersion keyVersion : keysToDelete) {
deleteObject(owner, keyVersion.getKey());
}
} else if (keysToDelete.size() <= owner.getMaxEntriesToDelete()) {
// Only one batch.
DeleteObjectsRequest deleteObjectsRequest
= new DeleteObjectsRequest(owner.getBucket());
deleteObjectsRequest.setKeyAndVersions(
keysToDelete.toArray(new KeyAndVersion[0]));
deleteObjects(owner, deleteObjectsRequest);
} else {
// Multi batches.
List<KeyAndVersion> keys = new ArrayList<>(
owner.getMaxEntriesToDelete());
for (KeyAndVersion key : keysToDelete) {
keys.add(key);
if (keys.size() == owner.getMaxEntriesToDelete()) {
// Delete one batch.
removeKeys(owner, keys, true, false);
}
}
// Delete the last batch
removeKeys(owner, keys, true, false);
}
if (clearKeys) {
keysToDelete.clear();
}
}
/**
* Translate an exception raised in an operation into an IOException. The
* specific type of IOException depends on the class of {@link ObsException}
* passed in, and any status codes included in the operation. That is: HTTP
* error codes are examined and can be used to build a more specific
* response.
*
* @param operation operation
* @param path path operated on (must not be null)
* @param exception obs exception raised
* @return an IOE which wraps the caught exception.
*/
static IOException translateException(final String operation,
final Path path, final ObsException exception) {
return translateException(operation, path.toString(), exception);
}
/**
* List the statuses of the files/directories in the given path if the path is
* a directory.
*
* @param owner the owner OBSFileSystem instance
* @param f given path
* @param recursive flag indicating if list is recursive
* @return the statuses of the files/directories in the given patch
* @throws FileNotFoundException when the path does not exist;
* @throws IOException due to an IO problem.
* @throws ObsException on failures inside the OBS SDK
*/
static FileStatus[] innerListStatus(final OBSFileSystem owner, final Path f,
final boolean recursive)
throws FileNotFoundException, IOException, ObsException {
Path path = qualify(owner, f);
String key = pathToKey(owner, path);
List<FileStatus> result;
final FileStatus fileStatus = owner.getFileStatus(path);
if (fileStatus.isDirectory()) {
key = maybeAddTrailingSlash(key);
String delimiter = recursive ? null : "/";
ListObjectsRequest request = createListObjectsRequest(owner, key,
delimiter);
LOG.debug(
"listStatus: doing listObjects for directory {} - recursive {}",
f, recursive);
OBSListing.FileStatusListingIterator files = owner.getObsListing()
.createFileStatusListingIterator(
path, request, OBSListing.ACCEPT_ALL,
new OBSListing.AcceptAllButSelfAndS3nDirs(path));
result = new ArrayList<>(files.getBatchSize());
while (files.hasNext()) {
result.add(files.next());
}
return result.toArray(new FileStatus[0]);
} else {
LOG.debug("Adding: rd (not a dir): {}", path);
FileStatus[] stats = new FileStatus[1];
stats[0] = fileStatus;
return stats;
}
}
/**
* Create a {@code ListObjectsRequest} request against this bucket.
*
* @param owner the owner OBSFileSystem instance
* @param key key for request
* @param delimiter any delimiter
* @return the request
*/
static ListObjectsRequest createListObjectsRequest(
final OBSFileSystem owner, final String key, final String delimiter) {
return createListObjectsRequest(owner, key, delimiter, -1);
}
static ListObjectsRequest createListObjectsRequest(
final OBSFileSystem owner, final String key, final String delimiter,
final int maxKeyNum) {
ListObjectsRequest request = new ListObjectsRequest();
request.setBucketName(owner.getBucket());
if (maxKeyNum > 0 && maxKeyNum < owner.getMaxKeys()) {
request.setMaxKeys(maxKeyNum);
} else {
request.setMaxKeys(owner.getMaxKeys());
}
request.setPrefix(key);
if (delimiter != null) {
request.setDelimiter(delimiter);
}
return request;
}
/**
* Implements the specific logic to reject root directory deletion. The caller
* must return the result of this call, rather than attempt to continue with
* the delete operation: deleting root directories is never allowed. This
* method simply implements the policy of when to return an exit code versus
* raise an exception.
*
* @param bucket bucket name
* @param isEmptyDir flag indicating if the directory is empty
* @param recursive recursive flag from command
* @return a return code for the operation
* @throws PathIOException if the operation was explicitly rejected.
*/
static boolean rejectRootDirectoryDelete(final String bucket,
final boolean isEmptyDir,
final boolean recursive)
throws IOException {
LOG.info("obs delete the {} root directory of {}", bucket, recursive);
if (isEmptyDir) {
return true;
}
if (recursive) {
return false;
} else {
// reject
throw new PathIOException(bucket, "Cannot delete root path");
}
}
/**
* Make the given path and all non-existent parents into directories.
*
* @param owner the owner OBSFileSystem instance
* @param path path to create
* @return true if a directory was created
* @throws FileAlreadyExistsException there is a file at the path specified
* @throws IOException other IO problems
* @throws ObsException on failures inside the OBS SDK
*/
static boolean innerMkdirs(final OBSFileSystem owner, final Path path)
throws IOException, FileAlreadyExistsException, ObsException {
LOG.debug("Making directory: {}", path);
FileStatus fileStatus;
try {
fileStatus = owner.getFileStatus(path);
if (fileStatus.isDirectory()) {
return true;
} else {
throw new FileAlreadyExistsException("Path is a file: " + path);
}
} catch (FileNotFoundException e) {
Path fPart = path.getParent();
do {
try {
fileStatus = owner.getFileStatus(fPart);
if (fileStatus.isDirectory()) {
break;
}
if (fileStatus.isFile()) {
throw new FileAlreadyExistsException(
String.format("Can't make directory for path '%s'"
+ " since it is a file.", fPart));
}
} catch (FileNotFoundException fnfe) {
LOG.debug("file {} not fount, but ignore.", path);
}
fPart = fPart.getParent();
} while (fPart != null);
String key = pathToKey(owner, path);
if (owner.isFsBucket()) {
OBSPosixBucketUtils.fsCreateFolder(owner, key);
} else {
OBSObjectBucketUtils.createFakeDirectory(owner, key);
}
return true;
}
}
/**
* Initiate a {@code listObjects} operation, incrementing metrics in the
* process.
*
* @param owner the owner OBSFileSystem instance
* @param request request to initiate
* @return the results
* @throws IOException on any failure to list objects
*/
static ObjectListing listObjects(final OBSFileSystem owner,
final ListObjectsRequest request) throws IOException {
if (request.getDelimiter() == null && request.getMarker() == null
&& owner.isFsBucket() && owner.isObsClientDFSListEnable()) {
return OBSFsDFSListing.fsDFSListObjects(owner, request);
}
return commonListObjects(owner, request);
}
static ObjectListing commonListObjects(final OBSFileSystem owner,
final ListObjectsRequest request) {
for (int retryTime = 1; retryTime < MAX_RETRY_TIME; retryTime++) {
try {
owner.getSchemeStatistics().incrementReadOps(1);
return owner.getObsClient().listObjects(request);
} catch (ObsException e) {
LOG.warn("Failed to commonListObjects for request[{}], retry "
+ "time [{}], due to exception[{}]",
request, retryTime, e);
try {
Thread.sleep(DELAY_TIME);
} catch (InterruptedException ie) {
LOG.error("Failed to commonListObjects for request[{}], "
+ "retry time [{}], due to exception[{}]",
request, retryTime, e);
throw e;
}
}
}
owner.getSchemeStatistics().incrementReadOps(1);
return owner.getObsClient().listObjects(request);
}
/**
* List the next set of objects.
*
* @param owner the owner OBSFileSystem instance
* @param objects paged result
* @return the next result object
* @throws IOException on any failure to list the next set of objects
*/
static ObjectListing continueListObjects(final OBSFileSystem owner,
final ObjectListing objects) throws IOException {
if (objects.getDelimiter() == null && owner.isFsBucket()
&& owner.isObsClientDFSListEnable()) {
return OBSFsDFSListing.fsDFSContinueListObjects(owner,
(OBSFsDFSListing) objects);
}
return commonContinueListObjects(owner, objects);
}
private static ObjectListing commonContinueListObjects(
final OBSFileSystem owner, final ObjectListing objects) {
String delimiter = objects.getDelimiter();
int maxKeyNum = objects.getMaxKeys();
// LOG.debug("delimiters: "+objects.getDelimiter());
ListObjectsRequest request = new ListObjectsRequest();
request.setMarker(objects.getNextMarker());
request.setBucketName(owner.getBucket());
request.setPrefix(objects.getPrefix());
if (maxKeyNum > 0 && maxKeyNum < owner.getMaxKeys()) {
request.setMaxKeys(maxKeyNum);
} else {
request.setMaxKeys(owner.getMaxKeys());
}
if (delimiter != null) {
request.setDelimiter(delimiter);
}
return commonContinueListObjects(owner, request);
}
static ObjectListing commonContinueListObjects(final OBSFileSystem owner,
final ListObjectsRequest request) {
for (int retryTime = 1; retryTime < MAX_RETRY_TIME; retryTime++) {
try {
owner.getSchemeStatistics().incrementReadOps(1);
return owner.getObsClient().listObjects(request);
} catch (ObsException e) {
LOG.warn("Continue list objects failed for request[{}], retry"
+ " time[{}], due to exception[{}]",
request, retryTime, e);
try {
Thread.sleep(DELAY_TIME);
} catch (InterruptedException ie) {
LOG.error("Continue list objects failed for request[{}], "
+ "retry time[{}], due to exception[{}]",
request, retryTime, e);
throw e;
}
}
}
owner.getSchemeStatistics().incrementReadOps(1);
return owner.getObsClient().listObjects(request);
}
/**
* Predicate: does the object represent a directory?.
*
* @param name object name
* @param size object size
* @return true if it meets the criteria for being an object
*/
public static boolean objectRepresentsDirectory(final String name,
final long size) {
return !name.isEmpty() && name.charAt(name.length() - 1) == '/'
&& size == 0L;
}
/**
* Date to long conversion. Handles null Dates that can be returned by OBS by
* returning 0
*
* @param date date from OBS query
* @return timestamp of the object
*/
public static long dateToLong(final Date date) {
if (date == null) {
return 0L;
}
return date.getTime() / OBSConstants.SEC2MILLISEC_FACTOR
* OBSConstants.SEC2MILLISEC_FACTOR;
}
// Used to check if a folder is empty or not.
static boolean isFolderEmpty(final OBSFileSystem owner, final String key)
throws FileNotFoundException, ObsException {
for (int retryTime = 1; retryTime < MAX_RETRY_TIME; retryTime++) {
try {
return innerIsFolderEmpty(owner, key);
} catch (ObsException e) {
LOG.warn(
"Failed to check empty folder for [{}], retry time [{}], "
+ "exception [{}]", key, retryTime, e);
try {
Thread.sleep(DELAY_TIME);
} catch (InterruptedException ie) {
throw e;
}
}
}
return innerIsFolderEmpty(owner, key);
}
// Used to check if a folder is empty or not by counting the number of
// sub objects in list.
private static boolean isFolderEmpty(final String key,
final ObjectListing objects) {
int count = objects.getObjects().size();
if (count >= 2) {
// There is a sub file at least.
return false;
} else if (count == 1 && !objects.getObjects()
.get(0)
.getObjectKey()
.equals(key)) {
// There is a sub file at least.
return false;
}
count = objects.getCommonPrefixes().size();
// There is a sub file at least.
// There is no sub object.
if (count >= 2) {
// There is a sub file at least.
return false;
} else {
return count != 1 || objects.getCommonPrefixes().get(0).equals(key);
}
}
// Used to check if a folder is empty or not.
static boolean innerIsFolderEmpty(final OBSFileSystem owner,
final String key)
throws FileNotFoundException, ObsException {
String obsKey = maybeAddTrailingSlash(key);
ListObjectsRequest request = new ListObjectsRequest();
request.setBucketName(owner.getBucket());
request.setPrefix(obsKey);
request.setDelimiter("/");
request.setMaxKeys(MAX_KEYS_FOR_CHECK_FOLDER_EMPTY);
owner.getSchemeStatistics().incrementReadOps(1);
ObjectListing objects = owner.getObsClient().listObjects(request);
if (!objects.getCommonPrefixes().isEmpty() || !objects.getObjects()
.isEmpty()) {
if (isFolderEmpty(obsKey, objects)) {
LOG.debug("Found empty directory {}", obsKey);
return true;
}
if (LOG.isDebugEnabled()) {
LOG.debug("Found path as directory (with /): {}/{}",
objects.getCommonPrefixes().size(),
objects.getObjects().size());
for (ObsObject summary : objects.getObjects()) {
LOG.debug("Summary: {} {}", summary.getObjectKey(),
summary.getMetadata().getContentLength());
}
for (String prefix : objects.getCommonPrefixes()) {
LOG.debug("Prefix: {}", prefix);
}
}
LOG.debug("Found non-empty directory {}", obsKey);
return false;
} else if (obsKey.isEmpty()) {
LOG.debug("Found root directory");
return true;
} else if (owner.isFsBucket()) {
LOG.debug("Found empty directory {}", obsKey);
return true;
}
LOG.debug("Not Found: {}", obsKey);
throw new FileNotFoundException("No such file or directory: " + obsKey);
}
/**
* Build a {@link LocatedFileStatus} from a {@link FileStatus} instance.
*
* @param owner the owner OBSFileSystem instance
* @param status file status
* @return a located status with block locations set up from this FS.
* @throws IOException IO Problems.
*/
static LocatedFileStatus toLocatedFileStatus(final OBSFileSystem owner,
final FileStatus status) throws IOException {
return new LocatedFileStatus(
status, status.isFile() ? owner.getFileBlockLocations(status, 0,
status.getLen()) : null);
}
/**
* Create a appendFile request. Adds the ACL and metadata
*
* @param owner the owner OBSFileSystem instance
* @param key key of object
* @param tmpFile temp file or input stream
* @param recordPosition client record next append position
* @return the request
* @throws IOException any problem
*/
static WriteFileRequest newAppendFileRequest(final OBSFileSystem owner,
final String key, final long recordPosition, final File tmpFile)
throws IOException {
Preconditions.checkNotNull(key);
Preconditions.checkNotNull(tmpFile);
ObsFSAttribute obsFsAttribute;
try {
GetAttributeRequest getAttributeReq = new GetAttributeRequest(
owner.getBucket(), key);
obsFsAttribute = owner.getObsClient().getAttribute(getAttributeReq);
} catch (ObsException e) {
throw translateException("GetAttributeRequest", key, e);
}
long appendPosition = Math.max(recordPosition,
obsFsAttribute.getContentLength());
if (recordPosition != obsFsAttribute.getContentLength()) {
LOG.warn("append url[{}] position[{}], file contentLength[{}] not"
+ " equal to recordPosition[{}].", key, appendPosition,
obsFsAttribute.getContentLength(), recordPosition);
}
WriteFileRequest writeFileReq = new WriteFileRequest(owner.getBucket(),
key, tmpFile, appendPosition);
writeFileReq.setAcl(owner.getCannedACL());
return writeFileReq;
}
/**
* Create a appendFile request. Adds the ACL and metadata
*
* @param owner the owner OBSFileSystem instance
* @param key key of object
* @param inputStream temp file or input stream
* @param recordPosition client record next append position
* @return the request
* @throws IOException any problem
*/
static WriteFileRequest newAppendFileRequest(final OBSFileSystem owner,
final String key, final long recordPosition,
final InputStream inputStream) throws IOException {
Preconditions.checkNotNull(key);
Preconditions.checkNotNull(inputStream);
ObsFSAttribute obsFsAttribute;
try {
GetAttributeRequest getAttributeReq = new GetAttributeRequest(
owner.getBucket(), key);
obsFsAttribute = owner.getObsClient().getAttribute(getAttributeReq);
} catch (ObsException e) {
throw translateException("GetAttributeRequest", key, e);
}
long appendPosition = Math.max(recordPosition,
obsFsAttribute.getContentLength());
if (recordPosition != obsFsAttribute.getContentLength()) {
LOG.warn("append url[{}] position[{}], file contentLength[{}] not"
+ " equal to recordPosition[{}].", key, appendPosition,
obsFsAttribute.getContentLength(), recordPosition);
}
WriteFileRequest writeFileReq = new WriteFileRequest(owner.getBucket(),
key, inputStream, appendPosition);
writeFileReq.setAcl(owner.getCannedACL());
return writeFileReq;
}
/**
* Append File.
*
* @param owner the owner OBSFileSystem instance
* @param appendFileRequest append object request
* @throws IOException on any failure to append file
*/
static void appendFile(final OBSFileSystem owner,
final WriteFileRequest appendFileRequest) throws IOException {
long len = 0;
if (appendFileRequest.getFile() != null) {
len = appendFileRequest.getFile().length();
}
try {
LOG.debug("Append file, key {} position {} size {}",
appendFileRequest.getObjectKey(),
appendFileRequest.getPosition(),
len);
owner.getObsClient().writeFile(appendFileRequest);
owner.getSchemeStatistics().incrementWriteOps(1);
owner.getSchemeStatistics().incrementBytesWritten(len);
} catch (ObsException e) {
throw translateException("AppendFile",
appendFileRequest.getObjectKey(), e);
}
}
/**
* Close the Closeable objects and <b>ignore</b> any Exception or null
* pointers. (This is the SLF4J equivalent of that in {@code IOUtils}).
*
* @param closeables the objects to close
*/
static void closeAll(final java.io.Closeable... closeables) {
for (java.io.Closeable c : closeables) {
if (c != null) {
try {
if (LOG != null) {
LOG.debug("Closing {}", c);
}
c.close();
} catch (Exception e) {
if (LOG != null && LOG.isDebugEnabled()) {
LOG.debug("Exception in closing {}", c, e);
}
}
}
}
}
/**
* Extract an exception from a failed future, and convert to an IOE.
*
* @param operation operation which failed
* @param path path operated on (may be null)
* @param ee execution exception
* @return an IOE which can be thrown
*/
static IOException extractException(final String operation,
final String path, final ExecutionException ee) {
IOException ioe;
Throwable cause = ee.getCause();
if (cause instanceof ObsException) {
ioe = translateException(operation, path, (ObsException) cause);
} else if (cause instanceof IOException) {
ioe = (IOException) cause;
} else {
ioe = new IOException(operation + " failed: " + cause, cause);
}
return ioe;
}
/**
* Create a files status instance from a listing.
*
* @param keyPath path to entry
* @param summary summary from OBS
* @param blockSize block size to declare.
* @param owner owner of the file
* @return a status entry
*/
static OBSFileStatus createFileStatus(
final Path keyPath, final ObsObject summary, final long blockSize,
final String owner) {
if (objectRepresentsDirectory(
summary.getObjectKey(), summary.getMetadata().getContentLength())) {
return new OBSFileStatus(keyPath, owner);
} else {
return new OBSFileStatus(
summary.getMetadata().getContentLength(),
dateToLong(summary.getMetadata().getLastModified()),
keyPath,
blockSize,
owner);
}
}
/**
* Return the access key and secret for OBS API use. Credentials may exist in
* configuration, within credential providers or indicated in the UserInfo of
* the name URI param.
*
* @param name the URI for which we need the access keys.
* @param conf the Configuration object to interrogate for keys.
* @return OBSAccessKeys
* @throws IOException problems retrieving passwords from KMS.
*/
static OBSLoginHelper.Login getOBSAccessKeys(final URI name,
final Configuration conf)
throws IOException {
OBSLoginHelper.Login login
= OBSLoginHelper.extractLoginDetailsWithWarnings(name);
Configuration c =
ProviderUtils.excludeIncompatibleCredentialProviders(conf,
OBSFileSystem.class);
String accessKey = getPassword(c, OBSConstants.ACCESS_KEY,
login.getUser());
String secretKey = getPassword(c, OBSConstants.SECRET_KEY,
login.getPassword());
String sessionToken = getPassword(c, OBSConstants.SESSION_TOKEN,
login.getToken());
return new OBSLoginHelper.Login(accessKey, secretKey, sessionToken);
}
/**
* Get a password from a configuration, or, if a value is passed in, pick that
* up instead.
*
* @param conf configuration
* @param key key to look up
* @param val current value: if non empty this is used instead of querying
* the configuration.
* @return a password or "".
* @throws IOException on any problem
*/
private static String getPassword(final Configuration conf,
final String key, final String val) throws IOException {
return StringUtils.isEmpty(val) ? lookupPassword(conf, key) : val;
}
/**
* Get a password from a configuration/configured credential providers.
*
* @param conf configuration
* @param key key to look up
* @return a password or the value in {@code defVal}
* @throws IOException on any problem
*/
private static String lookupPassword(final Configuration conf,
final String key) throws IOException {
try {
final char[] pass = conf.getPassword(key);
return pass != null ? new String(pass).trim() : "";
} catch (IOException ioe) {
throw new IOException("Cannot find password option " + key, ioe);
}
}
/**
* String information about a summary entry for debug messages.
*
* @param summary summary object
* @return string value
*/
static String stringify(final ObsObject summary) {
return summary.getObjectKey() + " size=" + summary.getMetadata()
.getContentLength();
}
/**
* Get a integer option not smaller than the minimum allowed value.
*
* @param conf configuration
* @param key key to look up
* @param defVal default value
* @param min minimum value
* @return the value
* @throws IllegalArgumentException if the value is below the minimum
*/
static int intOption(final Configuration conf, final String key,
final int defVal,
final int min) {
int v = conf.getInt(key, defVal);
Preconditions.checkArgument(
v >= min,
String.format("Value of %s: %d is below the minimum value %d", key,
v, min));
LOG.debug("Value of {} is {}", key, v);
return v;
}
/**
* Get a long option not smaller than the minimum allowed value.
*
* @param conf configuration
* @param key key to look up
* @param defVal default value
* @param min minimum value
* @return the value
* @throws IllegalArgumentException if the value is below the minimum
*/
static long longOption(final Configuration conf, final String key,
final long defVal,
final long min) {
long v = conf.getLong(key, defVal);
Preconditions.checkArgument(
v >= min,
String.format("Value of %s: %d is below the minimum value %d", key,
v, min));
LOG.debug("Value of {} is {}", key, v);
return v;
}
/**
* Get a long option not smaller than the minimum allowed value, supporting
* memory prefixes K,M,G,T,P.
*
* @param conf configuration
* @param key key to look up
* @param defVal default value
* @param min minimum value
* @return the value
* @throws IllegalArgumentException if the value is below the minimum
*/
static long longBytesOption(final Configuration conf, final String key,
final long defVal,
final long min) {
long v = conf.getLongBytes(key, defVal);
Preconditions.checkArgument(
v >= min,
String.format("Value of %s: %d is below the minimum value %d", key,
v, min));
LOG.debug("Value of {} is {}", key, v);
return v;
}
/**
* Get a size property from the configuration: this property must be at least
* equal to {@link OBSConstants#MULTIPART_MIN_SIZE}. If it is too small, it is
* rounded up to that minimum, and a warning printed.
*
* @param conf configuration
* @param property property name
* @param defVal default value
* @return the value, guaranteed to be above the minimum size
*/
public static long getMultipartSizeProperty(final Configuration conf,
final String property, final long defVal) {
long partSize = conf.getLongBytes(property, defVal);
if (partSize < OBSConstants.MULTIPART_MIN_SIZE) {
LOG.warn("{} must be at least 5 MB; configured value is {}",
property, partSize);
partSize = OBSConstants.MULTIPART_MIN_SIZE;
}
return partSize;
}
/**
* Ensure that the long value is in the range of an integer.
*
* @param name property name for error messages
* @param size original size
* @return the size, guaranteed to be less than or equal to the max value of
* an integer.
*/
static int ensureOutputParameterInRange(final String name,
final long size) {
if (size > Integer.MAX_VALUE) {
LOG.warn(
"obs: {} capped to ~2.14GB"
+ " (maximum allowed size with current output mechanism)",
name);
return Integer.MAX_VALUE;
} else {
return (int) size;
}
}
/**
* Propagates bucket-specific settings into generic OBS configuration keys.
* This is done by propagating the values of the form {@code
* fs.obs.bucket.${bucket}.key} to {@code fs.obs.key}, for all values of "key"
* other than a small set of unmodifiable values.
*
* <p>The source of the updated property is set to the key name of the
* bucket property, to aid in diagnostics of where things came from.
*
* <p>Returns a new configuration. Why the clone? You can use the same conf
* for different filesystems, and the original values are not updated.
*
* <p>The {@code fs.obs.impl} property cannot be set, nor can any with the
* prefix {@code fs.obs.bucket}.
*
* <p>This method does not propagate security provider path information
* from the OBS property into the Hadoop common provider: callers must call
* {@link #patchSecurityCredentialProviders(Configuration)} explicitly.
*
* @param source Source Configuration object.
* @param bucket bucket name. Must not be empty.
* @return a (potentially) patched clone of the original.
*/
static Configuration propagateBucketOptions(final Configuration source,
final String bucket) {
Preconditions.checkArgument(StringUtils.isNotEmpty(bucket), "bucket");
final String bucketPrefix = OBSConstants.FS_OBS_BUCKET_PREFIX + bucket
+ '.';
LOG.debug("Propagating entries under {}", bucketPrefix);
final Configuration dest = new Configuration(source);
for (Map.Entry<String, String> entry : source) {
final String key = entry.getKey();
// get the (unexpanded) value.
final String value = entry.getValue();
if (!key.startsWith(bucketPrefix) || bucketPrefix.equals(key)) {
continue;
}
// there's a bucket prefix, so strip it
final String stripped = key.substring(bucketPrefix.length());
if (stripped.startsWith("bucket.") || "impl".equals(stripped)) {
// tell user off
LOG.debug("Ignoring bucket option {}", key);
} else {
// propagate the value, building a new origin field.
// to track overwrites, the generic key is overwritten even if
// already matches the new one.
final String generic = OBSConstants.FS_OBS_PREFIX + stripped;
LOG.debug("Updating {}", generic);
dest.set(generic, value, key);
}
}
return dest;
}
/**
* Patch the security credential provider information in {@link
* #CREDENTIAL_PROVIDER_PATH} with the providers listed in {@link
* OBSConstants#OBS_SECURITY_CREDENTIAL_PROVIDER_PATH}.
*
* <p>This allows different buckets to use different credential files.
*
* @param conf configuration to patch
*/
static void patchSecurityCredentialProviders(final Configuration conf) {
Collection<String> customCredentials =
conf.getStringCollection(
OBSConstants.OBS_SECURITY_CREDENTIAL_PROVIDER_PATH);
Collection<String> hadoopCredentials = conf.getStringCollection(
CREDENTIAL_PROVIDER_PATH);
if (!customCredentials.isEmpty()) {
List<String> all = Lists.newArrayList(customCredentials);
all.addAll(hadoopCredentials);
String joined = StringUtils.join(all, ',');
LOG.debug("Setting {} to {}", CREDENTIAL_PROVIDER_PATH, joined);
conf.set(CREDENTIAL_PROVIDER_PATH, joined, "patch of "
+ OBSConstants.OBS_SECURITY_CREDENTIAL_PROVIDER_PATH);
}
}
/**
* Verify that the bucket exists. This does not check permissions, not even
* read access.
*
* @param owner the owner OBSFileSystem instance
* @throws FileNotFoundException the bucket is absent
* @throws IOException any other problem talking to OBS
*/
static void verifyBucketExists(final OBSFileSystem owner)
throws FileNotFoundException, IOException {
int retryTime = 1;
while (true) {
try {
if (!owner.getObsClient().headBucket(owner.getBucket())) {
throw new FileNotFoundException(
"Bucket " + owner.getBucket() + " does not exist");
}
return;
} catch (ObsException e) {
LOG.warn("Failed to head bucket for [{}], retry time [{}], "
+ "exception [{}]", owner.getBucket(), retryTime,
translateException("doesBucketExist", owner.getBucket(),
e));
if (MAX_RETRY_TIME == retryTime) {
throw translateException("doesBucketExist",
owner.getBucket(), e);
}
try {
Thread.sleep(DELAY_TIME);
} catch (InterruptedException ie) {
throw e;
}
}
retryTime++;
}
}
/**
* initialize multi-part upload, purge larger than the value of
* PURGE_EXISTING_MULTIPART_AGE.
*
* @param owner the owner OBSFileSystem instance
* @param conf the configuration to use for the FS
* @throws IOException on any failure to initialize multipart upload
*/
static void initMultipartUploads(final OBSFileSystem owner,
final Configuration conf)
throws IOException {
boolean purgeExistingMultipart =
conf.getBoolean(OBSConstants.PURGE_EXISTING_MULTIPART,
OBSConstants.DEFAULT_PURGE_EXISTING_MULTIPART);
long purgeExistingMultipartAge =
longOption(conf, OBSConstants.PURGE_EXISTING_MULTIPART_AGE,
OBSConstants.DEFAULT_PURGE_EXISTING_MULTIPART_AGE, 0);
if (!purgeExistingMultipart) {
return;
}
final Date purgeBefore = new Date(
new Date().getTime() - purgeExistingMultipartAge * 1000);
try {
ListMultipartUploadsRequest request
= new ListMultipartUploadsRequest(owner.getBucket());
while (true) {
// List + purge
MultipartUploadListing uploadListing = owner.getObsClient()
.listMultipartUploads(request);
for (MultipartUpload upload
: uploadListing.getMultipartTaskList()) {
if (upload.getInitiatedDate().compareTo(purgeBefore) < 0) {
owner.getObsClient().abortMultipartUpload(
new AbortMultipartUploadRequest(
owner.getBucket(), upload.getObjectKey(),
upload.getUploadId()));
}
}
if (!uploadListing.isTruncated()) {
break;
}
request.setUploadIdMarker(
uploadListing.getNextUploadIdMarker());
request.setKeyMarker(uploadListing.getNextKeyMarker());
}
} catch (ObsException e) {
if (e.getResponseCode() == FORBIDDEN_CODE) {
LOG.debug("Failed to purging multipart uploads against {},"
+ " FS may be read only", owner.getBucket(),
e);
} else {
throw translateException("purging multipart uploads",
owner.getBucket(), e);
}
}
}
static void shutdownAll(final ExecutorService... executors) {
for (ExecutorService exe : executors) {
if (exe != null) {
try {
if (LOG != null) {
LOG.debug("Shutdown {}", exe);
}
exe.shutdown();
} catch (Exception e) {
if (LOG != null && LOG.isDebugEnabled()) {
LOG.debug("Exception in shutdown {}", exe, e);
}
}
}
}
}
}
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