PrestoS3FileSystem.java
/*
* Licensed 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 com.facebook.presto.hive.s3;
import com.amazonaws.AbortedException;
import com.amazonaws.AmazonClientException;
import com.amazonaws.ClientConfiguration;
import com.amazonaws.Protocol;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.AWSCredentialsProvider;
import com.amazonaws.auth.AWSStaticCredentialsProvider;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.auth.DefaultAWSCredentialsProviderChain;
import com.amazonaws.auth.InstanceProfileCredentialsProvider;
import com.amazonaws.auth.STSAssumeRoleSessionCredentialsProvider;
import com.amazonaws.auth.WebIdentityTokenCredentialsProvider;
import com.amazonaws.client.builder.AwsClientBuilder.EndpointConfiguration;
import com.amazonaws.event.ProgressEvent;
import com.amazonaws.event.ProgressEventType;
import com.amazonaws.event.ProgressListener;
import com.amazonaws.metrics.RequestMetricCollector;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Builder;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.AmazonS3EncryptionClient;
import com.amazonaws.services.s3.model.AmazonS3Exception;
import com.amazonaws.services.s3.model.CannedAccessControlList;
import com.amazonaws.services.s3.model.EncryptionMaterialsProvider;
import com.amazonaws.services.s3.model.GetObjectRequest;
import com.amazonaws.services.s3.model.KMSEncryptionMaterialsProvider;
import com.amazonaws.services.s3.model.ListObjectsV2Request;
import com.amazonaws.services.s3.model.ListObjectsV2Result;
import com.amazonaws.services.s3.model.ObjectMetadata;
import com.amazonaws.services.s3.model.PutObjectRequest;
import com.amazonaws.services.s3.model.S3ObjectInputStream;
import com.amazonaws.services.s3.model.S3ObjectSummary;
import com.amazonaws.services.s3.model.SSEAwsKeyManagementParams;
import com.amazonaws.services.s3.model.StorageClass;
import com.amazonaws.services.s3.transfer.Transfer;
import com.amazonaws.services.s3.transfer.TransferManager;
import com.amazonaws.services.s3.transfer.TransferManagerBuilder;
import com.amazonaws.services.s3.transfer.Upload;
import com.facebook.airlift.log.Logger;
import com.facebook.presto.hive.filesystem.ExtendedFileSystem;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.AbstractSequentialIterator;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterators;
import com.google.common.io.Closer;
import com.google.common.net.MediaType;
import io.airlift.units.DataSize;
import io.airlift.units.Duration;
import org.apache.hadoop.conf.Configurable;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.BlockLocation;
import org.apache.hadoop.fs.BufferedFSInputStream;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FSInputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.LocatedFileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.RemoteIterator;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.util.Progressable;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.Closeable;
import java.io.EOFException;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InterruptedIOException;
import java.io.UncheckedIOException;
import java.net.URI;
import java.nio.file.Files;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.OptionalInt;
import java.util.Set;
import java.util.concurrent.atomic.AtomicBoolean;
import static com.amazonaws.regions.Regions.US_EAST_1;
import static com.amazonaws.services.s3.Headers.SERVER_SIDE_ENCRYPTION;
import static com.amazonaws.services.s3.Headers.UNENCRYPTED_CONTENT_LENGTH;
import static com.amazonaws.services.s3.model.StorageClass.DeepArchive;
import static com.amazonaws.services.s3.model.StorageClass.Glacier;
import static com.facebook.presto.hive.RetryDriver.retry;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_ACCESS_KEY;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_ACL_TYPE;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_CONNECT_TIMEOUT;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_CREDENTIALS_PROVIDER;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_ENCRYPTION_MATERIALS_PROVIDER;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_ENDPOINT;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_IAM_ROLE;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_IAM_ROLE_SESSION_NAME;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_KMS_KEY_ID;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_MAX_BACKOFF_TIME;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_MAX_CLIENT_RETRIES;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_MAX_CONNECTIONS;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_MAX_ERROR_RETRIES;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_MAX_RETRY_TIME;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_MULTIPART_MIN_FILE_SIZE;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_MULTIPART_MIN_PART_SIZE;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_PATH_STYLE_ACCESS;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_PIN_CLIENT_TO_CURRENT_REGION;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_SECRET_KEY;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_SIGNER_TYPE;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_SKIP_GLACIER_OBJECTS;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_SOCKET_TIMEOUT;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_SSE_ENABLED;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_SSE_KMS_KEY_ID;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_SSE_TYPE;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_SSL_ENABLED;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_STAGING_DIRECTORY;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_STORAGE_CLASS;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_USER_AGENT_PREFIX;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_USER_AGENT_SUFFIX;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_USE_INSTANCE_CREDENTIALS;
import static com.facebook.presto.hive.s3.S3ConfigurationUpdater.S3_WEB_IDENTITY_ENABLED;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkPositionIndexes;
import static com.google.common.base.Strings.isNullOrEmpty;
import static com.google.common.base.Strings.nullToEmpty;
import static com.google.common.base.Throwables.throwIfInstanceOf;
import static com.google.common.base.Throwables.throwIfUnchecked;
import static com.google.common.base.Verify.verify;
import static com.google.common.collect.Iterables.toArray;
import static io.airlift.units.DataSize.Unit.MEGABYTE;
import static java.lang.Math.max;
import static java.lang.Math.toIntExact;
import static java.lang.String.format;
import static java.net.HttpURLConnection.HTTP_BAD_REQUEST;
import static java.net.HttpURLConnection.HTTP_FORBIDDEN;
import static java.net.HttpURLConnection.HTTP_NOT_FOUND;
import static java.nio.file.Files.createDirectories;
import static java.nio.file.Files.createTempFile;
import static java.util.Objects.requireNonNull;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.apache.hadoop.fs.FSExceptionMessages.CANNOT_SEEK_PAST_EOF;
import static org.apache.hadoop.fs.FSExceptionMessages.NEGATIVE_SEEK;
import static org.apache.hadoop.fs.FSExceptionMessages.STREAM_IS_CLOSED;
public class PrestoS3FileSystem
extends ExtendedFileSystem
{
private static final Logger log = Logger.get(PrestoS3FileSystem.class);
private static final PrestoS3FileSystemStats STATS = new PrestoS3FileSystemStats();
private static RequestMetricCollector metricCollector = new PrestoS3FileSystemMetricCollector(STATS);
private static final String DIRECTORY_SUFFIX = "_$folder$";
private static final DataSize BLOCK_SIZE = new DataSize(32, MEGABYTE);
private static final DataSize MAX_SKIP_SIZE = new DataSize(1, MEGABYTE);
private static final String PATH_SEPARATOR = "/";
private static final Duration BACKOFF_MIN_SLEEP = new Duration(1, SECONDS);
private static final int HTTP_RANGE_NOT_SATISFIABLE = 416;
private static final MediaType X_DIRECTORY_MEDIA_TYPE = MediaType.create("application", "x-directory");
private static final MediaType OCTET_STREAM_MEDIA_TYPE = MediaType.create("application", "octet-stream");
private static final Set<String> GLACIER_STORAGE_CLASSES = ImmutableSet.of(Glacier.toString(), DeepArchive.toString());
private URI uri;
private Path workingDirectory;
private AmazonS3 s3;
private AWSCredentialsProvider credentialsProvider;
private File stagingDirectory;
private int maxAttempts;
private Duration maxBackoffTime;
private Duration maxRetryTime;
private boolean useInstanceCredentials;
private String s3IamRole;
private String s3IamRoleSessionName;
private boolean pinS3ClientToCurrentRegion;
private boolean sseEnabled;
private PrestoS3SseType sseType;
private String sseKmsKeyId;
private boolean isPathStyleAccess;
private long multiPartUploadMinFileSize;
private long multiPartUploadMinPartSize;
private PrestoS3AclType s3AclType;
private boolean skipGlacierObjects;
private PrestoS3StorageClass s3StorageClass;
private boolean webIdentityEnabled;
@Override
public void initialize(URI uri, Configuration conf)
throws IOException
{
requireNonNull(uri, "uri is null");
requireNonNull(conf, "conf is null");
super.initialize(uri, conf);
setConf(conf);
this.uri = URI.create(uri.getScheme() + "://" + uri.getAuthority());
this.workingDirectory = new Path(PATH_SEPARATOR).makeQualified(this.uri, new Path(PATH_SEPARATOR));
HiveS3Config defaults = new HiveS3Config();
this.stagingDirectory = new File(conf.get(S3_STAGING_DIRECTORY, defaults.getS3StagingDirectory().toString()));
this.maxAttempts = conf.getInt(S3_MAX_CLIENT_RETRIES, defaults.getS3MaxClientRetries()) + 1;
this.maxBackoffTime = Duration.valueOf(conf.get(S3_MAX_BACKOFF_TIME, defaults.getS3MaxBackoffTime().toString()));
this.maxRetryTime = Duration.valueOf(conf.get(S3_MAX_RETRY_TIME, defaults.getS3MaxRetryTime().toString()));
int maxErrorRetries = conf.getInt(S3_MAX_ERROR_RETRIES, defaults.getS3MaxErrorRetries());
boolean sslEnabled = conf.getBoolean(S3_SSL_ENABLED, defaults.isS3SslEnabled());
Duration connectTimeout = Duration.valueOf(conf.get(S3_CONNECT_TIMEOUT, defaults.getS3ConnectTimeout().toString()));
Duration socketTimeout = Duration.valueOf(conf.get(S3_SOCKET_TIMEOUT, defaults.getS3SocketTimeout().toString()));
int maxConnections = conf.getInt(S3_MAX_CONNECTIONS, defaults.getS3MaxConnections());
this.multiPartUploadMinFileSize = conf.getLong(S3_MULTIPART_MIN_FILE_SIZE, defaults.getS3MultipartMinFileSize().toBytes());
this.multiPartUploadMinPartSize = conf.getLong(S3_MULTIPART_MIN_PART_SIZE, defaults.getS3MultipartMinPartSize().toBytes());
this.isPathStyleAccess = conf.getBoolean(S3_PATH_STYLE_ACCESS, defaults.isS3PathStyleAccess());
this.useInstanceCredentials = conf.getBoolean(S3_USE_INSTANCE_CREDENTIALS, defaults.isS3UseInstanceCredentials());
this.pinS3ClientToCurrentRegion = conf.getBoolean(S3_PIN_CLIENT_TO_CURRENT_REGION, defaults.isPinS3ClientToCurrentRegion());
this.s3IamRole = conf.get(S3_IAM_ROLE, defaults.getS3IamRole());
this.s3IamRoleSessionName = conf.get(S3_IAM_ROLE_SESSION_NAME, defaults.getS3IamRoleSessionName());
verify(!(useInstanceCredentials && conf.get(S3_IAM_ROLE) != null),
"Invalid configuration: either use instance credentials or specify an iam role");
verify((pinS3ClientToCurrentRegion && conf.get(S3_ENDPOINT) == null) || !pinS3ClientToCurrentRegion,
"Invalid configuration: either endpoint can be set or S3 client can be pinned to the current region");
this.sseEnabled = conf.getBoolean(S3_SSE_ENABLED, defaults.isS3SseEnabled());
this.sseType = PrestoS3SseType.valueOf(conf.get(S3_SSE_TYPE, defaults.getS3SseType().name()));
this.sseKmsKeyId = conf.get(S3_SSE_KMS_KEY_ID, defaults.getS3SseKmsKeyId());
this.s3AclType = PrestoS3AclType.valueOf(conf.get(S3_ACL_TYPE, defaults.getS3AclType().name()));
String userAgentPrefix = conf.get(S3_USER_AGENT_PREFIX, defaults.getS3UserAgentPrefix());
this.skipGlacierObjects = conf.getBoolean(S3_SKIP_GLACIER_OBJECTS, defaults.isSkipGlacierObjects());
this.s3StorageClass = conf.getEnum(S3_STORAGE_CLASS, defaults.getS3StorageClass());
this.webIdentityEnabled = conf.getBoolean(S3_WEB_IDENTITY_ENABLED, false);
checkArgument(!(webIdentityEnabled && isNullOrEmpty(s3IamRole)), "Invalid configuration: hive.s3.iam-role must be provided when hive.s3.web.identity.auth.enabled is set to true");
ClientConfiguration configuration = new ClientConfiguration()
.withMaxErrorRetry(maxErrorRetries)
.withProtocol(sslEnabled ? Protocol.HTTPS : Protocol.HTTP)
.withConnectionTimeout(toIntExact(connectTimeout.toMillis()))
.withSocketTimeout(toIntExact(socketTimeout.toMillis()))
.withMaxConnections(maxConnections)
.withUserAgentPrefix(userAgentPrefix)
.withUserAgentSuffix(S3_USER_AGENT_SUFFIX);
this.credentialsProvider = createAwsCredentialsProvider(uri, conf);
this.s3 = createAmazonS3Client(conf, configuration);
}
@Override
public void close()
throws IOException
{
try (Closer closer = Closer.create()) {
closer.register(super::close);
if (credentialsProvider instanceof Closeable) {
closer.register((Closeable) credentialsProvider);
}
closer.register(s3::shutdown);
}
}
@Override
public URI getUri()
{
return uri;
}
@Override
public String getScheme()
{
return uri.getScheme();
}
@Override
public Path getWorkingDirectory()
{
return workingDirectory;
}
@Override
public void setWorkingDirectory(Path path)
{
workingDirectory = path;
}
@Override
public FileStatus[] listStatus(Path path)
throws IOException
{
STATS.newListStatusCall();
List<LocatedFileStatus> list = new ArrayList<>();
RemoteIterator<LocatedFileStatus> iterator = listLocatedStatus(path);
while (iterator.hasNext()) {
list.add(iterator.next());
}
return toArray(list, LocatedFileStatus.class);
}
@Override
public RemoteIterator<LocatedFileStatus> listFiles(Path path, boolean recursive)
{
// Either a single level or full listing, depending on the recursive flag, no "directories" are included
return new S3ObjectsRemoteIterator(listPrefix(path, OptionalInt.empty(), recursive ? ListingMode.RECURSIVE_FILES_ONLY : ListingMode.SHALLOW_FILES_ONLY));
}
@Override
public RemoteIterator<LocatedFileStatus> listLocatedStatus(Path path)
{
STATS.newListLocatedStatusCall();
return new S3ObjectsRemoteIterator(listPrefix(path, OptionalInt.empty(), ListingMode.SHALLOW_ALL));
}
private static final class S3ObjectsRemoteIterator
implements RemoteIterator<LocatedFileStatus>
{
private final Iterator<LocatedFileStatus> iterator;
public S3ObjectsRemoteIterator(Iterator<LocatedFileStatus> iterator)
{
this.iterator = requireNonNull(iterator, "iterator is null");
}
@Override
public boolean hasNext()
throws IOException
{
try {
return iterator.hasNext();
}
catch (AmazonClientException e) {
throw new IOException(e);
}
}
@Override
public LocatedFileStatus next()
throws IOException
{
try {
return iterator.next();
}
catch (AmazonClientException e) {
throw new IOException(e);
}
}
}
@Override
public FileStatus getFileStatus(Path path)
throws IOException
{
if (path.getName().isEmpty()) {
// the bucket root requires special handling
if (getS3ObjectMetadata(path).getObjectMetadata() != null) {
return new FileStatus(0, true, 1, 0, 0, qualifiedPath(path));
}
throw new FileNotFoundException("File does not exist: " + path);
}
PrestoS3ObjectMetadata metadata = getS3ObjectMetadata(path);
if (metadata.getObjectMetadata() == null) {
// check if this path is a directory
Iterator<LocatedFileStatus> iterator = listPrefix(path, OptionalInt.of(1), ListingMode.SHALLOW_ALL);
if (iterator.hasNext()) {
return new FileStatus(0, true, 1, 0, 0, qualifiedPath(path));
}
throw new FileNotFoundException("File does not exist: " + path);
}
return new FileStatus(
getObjectSize(path, metadata.getObjectMetadata()),
// Some directories (e.g. uploaded through S3 GUI) return a charset in the Content-Type header
isDirectory(metadata),
1,
BLOCK_SIZE.toBytes(),
lastModifiedTime(metadata.getObjectMetadata()),
qualifiedPath(path));
}
private static boolean isDirectory(PrestoS3ObjectMetadata metadata)
{
ObjectMetadata objectMetadata = metadata.getObjectMetadata();
MediaType mediaType;
try {
mediaType = MediaType.parse(objectMetadata.getContentType());
}
catch (IllegalArgumentException e) {
log.debug(e, "Failed to parse contentType [%s], assuming not a directory", objectMetadata.getContentType());
return false;
}
return mediaType.is(X_DIRECTORY_MEDIA_TYPE) ||
(mediaType.is(OCTET_STREAM_MEDIA_TYPE)
&& metadata.isKeyNeedsPathSeparator()
&& objectMetadata.getContentLength() == 0);
}
private static long getObjectSize(Path path, ObjectMetadata metadata)
throws IOException
{
Map<String, String> userMetadata = metadata.getUserMetadata();
String length = userMetadata.get(UNENCRYPTED_CONTENT_LENGTH);
if (userMetadata.containsKey(SERVER_SIDE_ENCRYPTION) && length == null) {
throw new IOException(format("%s header is not set on an encrypted object: %s", UNENCRYPTED_CONTENT_LENGTH, path));
}
return (length != null) ? Long.parseLong(length) : metadata.getContentLength();
}
@Override
public FSDataInputStream open(Path path, int bufferSize)
{
return new FSDataInputStream(
new BufferedFSInputStream(
new PrestoS3InputStream(s3, getBucketName(uri), path, maxAttempts, maxBackoffTime, maxRetryTime),
bufferSize));
}
@Override
public FSDataOutputStream create(Path path, FsPermission permission, boolean overwrite, int bufferSize, short replication, long blockSize, Progressable progress)
throws IOException
{
if ((!overwrite) && exists(path)) {
throw new IOException("File already exists:" + path);
}
if (!stagingDirectory.exists()) {
createDirectories(stagingDirectory.toPath());
}
if (!stagingDirectory.isDirectory()) {
throw new IOException("Configured staging path is not a directory: " + stagingDirectory);
}
File tempFile = createTempFile(stagingDirectory.toPath(), "presto-s3-", ".tmp").toFile();
String key = keyFromPath(qualifiedPath(path));
return new FSDataOutputStream(
new PrestoS3OutputStream(s3,
getBucketName(uri),
key,
tempFile,
sseEnabled,
sseType,
sseKmsKeyId,
multiPartUploadMinFileSize,
multiPartUploadMinPartSize,
s3AclType,
s3StorageClass),
statistics);
}
@Override
public FSDataOutputStream append(Path f, int bufferSize, Progressable progress)
{
throw new UnsupportedOperationException("append");
}
@Override
public boolean rename(Path src, Path dst)
throws IOException
{
boolean srcDirectory;
try {
srcDirectory = directory(src);
}
catch (FileNotFoundException e) {
return false;
}
try {
if (!directory(dst)) {
// cannot copy a file to an existing file
return false;
}
// move source under destination directory
dst = new Path(dst, src.getName());
}
catch (FileNotFoundException e) {
// destination does not exist
}
if (keysEqual(src, dst)) {
return false;
}
if (srcDirectory) {
for (FileStatus file : listStatus(src)) {
rename(file.getPath(), new Path(dst, file.getPath().getName()));
}
deleteObject(keyFromPath(src) + DIRECTORY_SUFFIX);
}
else {
s3.copyObject(getBucketName(uri), keyFromPath(src), getBucketName(uri), keyFromPath(dst));
delete(src, true);
}
return true;
}
@Override
public boolean delete(Path path, boolean recursive)
throws IOException
{
try {
if (!directory(path)) {
return deleteObject(keyFromPath(path));
}
}
catch (FileNotFoundException e) {
return false;
}
if (!recursive) {
throw new IOException("Directory " + path + " is not empty");
}
for (FileStatus file : listStatus(path)) {
delete(file.getPath(), true);
}
deleteObject(keyFromPath(path) + DIRECTORY_SUFFIX);
return true;
}
private boolean directory(Path path)
throws IOException
{
return getFileStatus(path).isDirectory();
}
private boolean deleteObject(String key)
{
try {
s3.deleteObject(getBucketName(uri), key);
return true;
}
catch (AmazonClientException e) {
return false;
}
}
@Override
public boolean mkdirs(Path f, FsPermission permission)
{
// no need to do anything for S3
return true;
}
private enum ListingMode {
SHALLOW_ALL, // Shallow listing of files AND directories
SHALLOW_FILES_ONLY,
RECURSIVE_FILES_ONLY;
public boolean isFilesOnly()
{
return (this == SHALLOW_FILES_ONLY || this == RECURSIVE_FILES_ONLY);
}
}
private Iterator<LocatedFileStatus> listPrefix(Path path, OptionalInt initialMaxKeys, ListingMode mode)
{
String key = keyFromPath(path);
if (!key.isEmpty()) {
key += PATH_SEPARATOR;
}
ListObjectsV2Request request = new ListObjectsV2Request()
.withBucketName(getBucketName(uri))
.withPrefix(key)
.withDelimiter(mode == ListingMode.RECURSIVE_FILES_ONLY ? null : PATH_SEPARATOR)
.withMaxKeys(initialMaxKeys.isPresent() ? initialMaxKeys.getAsInt() : null);
STATS.newListObjectsCall();
Iterator<ListObjectsV2Result> listings = new AbstractSequentialIterator<ListObjectsV2Result>(s3.listObjectsV2(request))
{
@Override
protected ListObjectsV2Result computeNext(ListObjectsV2Result previous)
{
if (!previous.isTruncated()) {
return null;
}
// Clear any max keys set initially to allow AWS S3 to use its default batch size.
//Use the ContinuationToken from the previous response to fetch the next set of objects.
return s3.listObjectsV2(request
.withMaxKeys(null)
.withContinuationToken(previous.getNextContinuationToken()));
}
};
Iterator<LocatedFileStatus> result = Iterators.concat(Iterators.transform(listings, this::statusFromListing));
if (mode.isFilesOnly()) {
// Even recursive listing can still contain empty "directory" objects, must filter them out
result = Iterators.filter(result, LocatedFileStatus::isFile);
}
return result;
}
private Iterator<LocatedFileStatus> statusFromListing(ListObjectsV2Result listing)
{
List<String> prefixes = listing.getCommonPrefixes();
List<S3ObjectSummary> objects = listing.getObjectSummaries();
if (prefixes.isEmpty()) {
return statusFromObjects(objects);
}
if (objects.isEmpty()) {
return statusFromPrefixes(prefixes);
}
return Iterators.concat(
statusFromPrefixes(prefixes),
statusFromObjects(objects));
}
private Iterator<LocatedFileStatus> statusFromPrefixes(List<String> prefixes)
{
List<LocatedFileStatus> list = new ArrayList<>(prefixes.size());
for (String prefix : prefixes) {
Path path = qualifiedPath(new Path(PATH_SEPARATOR + prefix));
FileStatus status = new FileStatus(0, true, 1, 0, 0, path);
list.add(createLocatedFileStatus(status));
}
return list.iterator();
}
private Iterator<LocatedFileStatus> statusFromObjects(List<S3ObjectSummary> objects)
{
// NOTE: for encrypted objects, S3ObjectSummary.size() used below is NOT correct,
// however, to get the correct size we'd need to make an additional request to get
// user metadata, and in this case it doesn't matter.
return objects.stream()
.filter(object -> !object.getKey().endsWith(PATH_SEPARATOR))
.filter(object -> !skipGlacierObjects || !isGlacierObject(object))
.filter(object -> !isHadoopFolderMarker(object))
.map(object -> new FileStatus(
object.getSize(),
false,
1,
BLOCK_SIZE.toBytes(),
object.getLastModified().getTime(),
qualifiedPath(new Path(PATH_SEPARATOR + object.getKey()))))
.map(this::createLocatedFileStatus)
.iterator();
}
private boolean isGlacierObject(S3ObjectSummary object)
{
return GLACIER_STORAGE_CLASSES.contains(object.getStorageClass());
}
private boolean isHadoopFolderMarker(S3ObjectSummary object)
{
return (object.getKey().endsWith(DIRECTORY_SUFFIX) && (object.getSize() == 0));
}
/**
* This exception is for stopping retries for S3 calls that shouldn't be retried.
* For example, "Caused by: com.amazonaws.services.s3.model.AmazonS3Exception: Forbidden (Service: Amazon S3; Status Code: 403 ..."
*/
@VisibleForTesting
static class UnrecoverableS3OperationException
extends IOException
{
public UnrecoverableS3OperationException(Path path, Throwable cause)
{
// append the path info to the message
super(format("%s (Path: %s)", cause, path), cause);
}
}
@VisibleForTesting
PrestoS3ObjectMetadata getS3ObjectMetadata(Path path)
throws IOException
{
String bucketName = getBucketName(uri);
String key = keyFromPath(path);
ObjectMetadata s3ObjectMetadata = getS3ObjectMetadata(path, bucketName, key);
if (s3ObjectMetadata == null && !key.isEmpty()) {
return new PrestoS3ObjectMetadata(getS3ObjectMetadata(path, bucketName, key + PATH_SEPARATOR), true);
}
return new PrestoS3ObjectMetadata(s3ObjectMetadata, false);
}
private ObjectMetadata getS3ObjectMetadata(Path path, String bucketName, String key)
throws IOException
{
try {
return retry()
.maxAttempts(maxAttempts)
.exponentialBackoff(BACKOFF_MIN_SLEEP, maxBackoffTime, maxRetryTime, 2.0)
.stopOn(InterruptedException.class, UnrecoverableS3OperationException.class, AbortedException.class)
.onRetry(STATS::newGetMetadataRetry)
.run("getS3ObjectMetadata", () -> {
try {
STATS.newMetadataCall();
return s3.getObjectMetadata(bucketName, key);
}
catch (RuntimeException e) {
STATS.newGetMetadataError();
if (e instanceof AmazonS3Exception) {
switch (((AmazonS3Exception) e).getStatusCode()) {
case HTTP_NOT_FOUND:
return null;
case HTTP_FORBIDDEN:
case HTTP_BAD_REQUEST:
throw new UnrecoverableS3OperationException(path, e);
}
}
throw e;
}
});
}
catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new RuntimeException(e);
}
catch (Exception e) {
throwIfInstanceOf(e, IOException.class);
throwIfUnchecked(e);
throw new RuntimeException(e);
}
}
private Path qualifiedPath(Path path)
{
return path.makeQualified(this.uri, getWorkingDirectory());
}
private LocatedFileStatus createLocatedFileStatus(FileStatus status)
{
try {
BlockLocation[] fakeLocation = getFileBlockLocations(status, 0, status.getLen());
return new LocatedFileStatus(status, fakeLocation);
}
catch (IOException e) {
throw new UncheckedIOException(e);
}
}
private static long lastModifiedTime(ObjectMetadata metadata)
{
Date date = metadata.getLastModified();
return (date != null) ? date.getTime() : 0;
}
private static boolean keysEqual(Path p1, Path p2)
{
return keyFromPath(p1).equals(keyFromPath(p2));
}
public static String keyFromPath(Path path)
{
checkArgument(path.isAbsolute(), "Path is not absolute: %s", path);
String key = nullToEmpty(path.toUri().getPath());
if (key.startsWith(PATH_SEPARATOR)) {
key = key.substring(PATH_SEPARATOR.length());
}
if (key.endsWith(PATH_SEPARATOR)) {
key = key.substring(0, key.length() - PATH_SEPARATOR.length());
}
return key;
}
private AmazonS3 createAmazonS3Client(Configuration hadoopConfig, ClientConfiguration clientConfig)
{
Optional<EncryptionMaterialsProvider> encryptionMaterialsProvider = createEncryptionMaterialsProvider(hadoopConfig);
AmazonS3Builder<? extends AmazonS3Builder, ? extends AmazonS3> clientBuilder;
String signerType = hadoopConfig.get(S3_SIGNER_TYPE);
if (signerType != null) {
clientConfig.withSignerOverride(signerType);
}
if (encryptionMaterialsProvider.isPresent()) {
clientBuilder = AmazonS3EncryptionClient.encryptionBuilder()
.withCredentials(credentialsProvider)
.withEncryptionMaterials(encryptionMaterialsProvider.get())
.withClientConfiguration(clientConfig)
.withMetricsCollector(metricCollector);
}
else {
clientBuilder = AmazonS3Client.builder()
.withCredentials(credentialsProvider)
.withClientConfiguration(clientConfig)
.withMetricsCollector(metricCollector);
}
boolean regionOrEndpointSet = false;
// use local region when running inside of EC2
if (pinS3ClientToCurrentRegion) {
Region region = Regions.getCurrentRegion();
if (region != null) {
clientBuilder = clientBuilder.withRegion(region.getName());
regionOrEndpointSet = true;
}
}
String endpoint = hadoopConfig.get(S3_ENDPOINT);
if (endpoint != null) {
clientBuilder = clientBuilder.withEndpointConfiguration(new EndpointConfiguration(endpoint, null));
regionOrEndpointSet = true;
}
if (isPathStyleAccess) {
clientBuilder = clientBuilder.enablePathStyleAccess();
}
if (!regionOrEndpointSet) {
clientBuilder = clientBuilder.withRegion(US_EAST_1);
clientBuilder.setForceGlobalBucketAccessEnabled(true);
}
return clientBuilder.build();
}
private static Optional<EncryptionMaterialsProvider> createEncryptionMaterialsProvider(Configuration hadoopConfig)
{
String kmsKeyId = hadoopConfig.get(S3_KMS_KEY_ID);
if (kmsKeyId != null) {
return Optional.of(new KMSEncryptionMaterialsProvider(kmsKeyId));
}
String empClassName = hadoopConfig.get(S3_ENCRYPTION_MATERIALS_PROVIDER);
if (empClassName == null) {
return Optional.empty();
}
try {
Object instance = Class.forName(empClassName).getConstructor().newInstance();
if (!(instance instanceof EncryptionMaterialsProvider)) {
throw new RuntimeException("Invalid encryption materials provider class: " + instance.getClass().getName());
}
EncryptionMaterialsProvider emp = (EncryptionMaterialsProvider) instance;
if (emp instanceof Configurable) {
((Configurable) emp).setConf(hadoopConfig);
}
return Optional.of(emp);
}
catch (ReflectiveOperationException e) {
throw new RuntimeException("Unable to load or create S3 encryption materials provider: " + empClassName, e);
}
}
private AWSCredentialsProvider createAwsCredentialsProvider(URI uri, Configuration conf)
{
Optional<AWSCredentials> credentials = getAwsCredentials(uri, conf);
if (credentials.isPresent()) {
return new AWSStaticCredentialsProvider(credentials.get());
}
if (useInstanceCredentials) {
return InstanceProfileCredentialsProvider.getInstance();
}
if (!isNullOrEmpty(s3IamRole)) {
if (webIdentityEnabled) {
log.debug("Using Web Identity Token Credentials Provider.");
WebIdentityTokenCredentialsProvider.Builder providerBuilder = WebIdentityTokenCredentialsProvider.builder()
.roleArn(s3IamRole)
.roleSessionName(s3IamRoleSessionName);
return providerBuilder.build();
}
log.debug("Using STS Assume Role Session Credentials Provider.");
return new STSAssumeRoleSessionCredentialsProvider.Builder(s3IamRole, s3IamRoleSessionName)
.build();
}
String providerClass = conf.get(S3_CREDENTIALS_PROVIDER);
if (!isNullOrEmpty(providerClass)) {
return getCustomAWSCredentialsProvider(uri, conf, providerClass);
}
return DefaultAWSCredentialsProviderChain.getInstance();
}
private static AWSCredentialsProvider getCustomAWSCredentialsProvider(URI uri, Configuration conf, String providerClass)
{
try {
log.debug("Using AWS credential provider %s for URI %s", providerClass, uri);
return conf.getClassByName(providerClass)
.asSubclass(AWSCredentialsProvider.class)
.getConstructor(URI.class, Configuration.class)
.newInstance(uri, conf);
}
catch (ReflectiveOperationException e) {
throw new RuntimeException(format("Error creating an instance of %s for URI %s", providerClass, uri), e);
}
}
private static Optional<AWSCredentials> getAwsCredentials(URI uri, Configuration conf)
{
String accessKey = conf.get(S3_ACCESS_KEY);
String secretKey = conf.get(S3_SECRET_KEY);
String userInfo = uri.getUserInfo();
if (userInfo != null) {
int index = userInfo.indexOf(':');
if (index < 0) {
accessKey = userInfo;
}
else {
accessKey = userInfo.substring(0, index);
secretKey = userInfo.substring(index + 1);
}
}
if (isNullOrEmpty(accessKey) || isNullOrEmpty(secretKey)) {
return Optional.empty();
}
return Optional.of(new BasicAWSCredentials(accessKey, secretKey));
}
public static class PrestoS3ObjectMetadata
{
private final ObjectMetadata objectMetadata;
/**
* Certain filesystems treat empty directories as zero byte objects and their name ends with a path separator, i.e. '/'.
* To fetch ObjectMetadata for such keys, the path separator needs to be appended to the key otherwise null is returned.
* This field denotes whether a path separator was appended to the key while fetching the metadata for given path.
*/
private final boolean keyNeedsPathSeparator;
public PrestoS3ObjectMetadata(ObjectMetadata objectMetadata, boolean keyNeedsPathSeparator)
{
this.objectMetadata = objectMetadata;
this.keyNeedsPathSeparator = keyNeedsPathSeparator;
}
public ObjectMetadata getObjectMetadata()
{
return objectMetadata;
}
public boolean isKeyNeedsPathSeparator()
{
return keyNeedsPathSeparator;
}
}
private static class PrestoS3InputStream
extends FSInputStream
{
private final AmazonS3 s3;
private final String host;
private final Path path;
private final int maxAttempts;
private final Duration maxBackoffTime;
private final Duration maxRetryTime;
private final AtomicBoolean closed = new AtomicBoolean();
private InputStream in;
private long streamPosition;
private long nextReadPosition;
public PrestoS3InputStream(AmazonS3 s3, String host, Path path, int maxAttempts, Duration maxBackoffTime, Duration maxRetryTime)
{
this.s3 = requireNonNull(s3, "s3 is null");
this.host = requireNonNull(host, "host is null");
this.path = requireNonNull(path, "path is null");
checkArgument(maxAttempts >= 0, "maxAttempts cannot be negative");
this.maxAttempts = maxAttempts;
this.maxBackoffTime = requireNonNull(maxBackoffTime, "maxBackoffTime is null");
this.maxRetryTime = requireNonNull(maxRetryTime, "maxRetryTime is null");
}
@Override
public void close()
{
closed.set(true);
closeStream();
}
@Override
public int read(long position, byte[] buffer, int offset, int length)
throws IOException
{
checkClosed();
if (position < 0) {
throw new EOFException(NEGATIVE_SEEK);
}
checkPositionIndexes(offset, offset + length, buffer.length);
if (length == 0) {
return 0;
}
try {
return retry()
.maxAttempts(maxAttempts)
.exponentialBackoff(BACKOFF_MIN_SLEEP, maxBackoffTime, maxRetryTime, 2.0)
.stopOn(InterruptedException.class, UnrecoverableS3OperationException.class, EOFException.class, FileNotFoundException.class, AbortedException.class)
.onRetry(STATS::newGetObjectRetry)
.run("getS3Object", () -> {
InputStream stream;
try {
GetObjectRequest request = new GetObjectRequest(host, keyFromPath(path))
.withRange(position, (position + length) - 1);
stream = s3.getObject(request).getObjectContent();
}
catch (RuntimeException e) {
STATS.newGetObjectError();
if (e instanceof AmazonS3Exception) {
switch (((AmazonS3Exception) e).getStatusCode()) {
case HTTP_RANGE_NOT_SATISFIABLE:
throw new EOFException(CANNOT_SEEK_PAST_EOF);
case HTTP_NOT_FOUND:
throw new FileNotFoundException("File does not exist: " + path);
case HTTP_FORBIDDEN:
case HTTP_BAD_REQUEST:
throw new UnrecoverableS3OperationException(path, e);
}
}
throw e;
}
STATS.connectionOpened();
try {
int read = 0;
while (read < length) {
int n = stream.read(buffer, offset + read, length - read);
if (n <= 0) {
if (read > 0) {
return read;
}
return -1;
}
read += n;
}
return read;
}
catch (Throwable t) {
STATS.newReadError(t);
abortStream(stream);
throw t;
}
finally {
STATS.connectionReleased();
stream.close();
}
});
}
catch (Exception e) {
throw propagate(e);
}
}
@Override
public void seek(long pos)
throws IOException
{
checkClosed();
if (pos < 0) {
throw new EOFException(NEGATIVE_SEEK);
}
// this allows a seek beyond the end of the stream but the next read will fail
nextReadPosition = pos;
}
@Override
public long getPos()
{
return nextReadPosition;
}
@Override
public int read()
{
// This stream is wrapped with BufferedInputStream, so this method should never be called
throw new UnsupportedOperationException();
}
@Override
public int read(byte[] buffer, int offset, int length)
throws IOException
{
checkClosed();
try {
int bytesRead = retry()
.maxAttempts(maxAttempts)
.exponentialBackoff(BACKOFF_MIN_SLEEP, maxBackoffTime, maxRetryTime, 2.0)
.stopOn(InterruptedException.class, UnrecoverableS3OperationException.class, AbortedException.class, FileNotFoundException.class)
.onRetry(STATS::newReadRetry)
.run("readStream", () -> {
seekStream();
try {
return in.read(buffer, offset, length);
}
catch (Exception e) {
STATS.newReadError(e);
closeStream();
throw e;
}
});
if (bytesRead != -1) {
streamPosition += bytesRead;
nextReadPosition += bytesRead;
}
return bytesRead;
}
catch (Exception e) {
throw propagate(e);
}
}
@Override
public boolean seekToNewSource(long targetPos)
{
return false;
}
private void seekStream()
throws IOException
{
if ((in != null) && (nextReadPosition == streamPosition)) {
// already at specified position
return;
}
if ((in != null) && (nextReadPosition > streamPosition)) {
// seeking forwards
long skip = nextReadPosition - streamPosition;
if (skip <= max(in.available(), MAX_SKIP_SIZE.toBytes())) {
// already buffered or seek is small enough
try {
if (in.skip(skip) == skip) {
streamPosition = nextReadPosition;
return;
}
}
catch (IOException ignored) {
// will retry by re-opening the stream
}
}
}
// close the stream and open at desired position
streamPosition = nextReadPosition;
closeStream();
openStream();
}
private void openStream()
throws IOException
{
if (in == null) {
in = openStream(path, nextReadPosition);
streamPosition = nextReadPosition;
STATS.connectionOpened();
}
}
private InputStream openStream(Path path, long start)
throws IOException
{
try {
return retry()
.maxAttempts(maxAttempts)
.exponentialBackoff(BACKOFF_MIN_SLEEP, maxBackoffTime, maxRetryTime, 2.0)
.stopOn(InterruptedException.class, UnrecoverableS3OperationException.class, FileNotFoundException.class, AbortedException.class)
.onRetry(STATS::newGetObjectRetry)
.run("getS3Object", () -> {
try {
GetObjectRequest request = new GetObjectRequest(host, keyFromPath(path)).withRange(start);
return s3.getObject(request).getObjectContent();
}
catch (RuntimeException e) {
STATS.newGetObjectError();
if (e instanceof AmazonS3Exception) {
switch (((AmazonS3Exception) e).getStatusCode()) {
case HTTP_RANGE_NOT_SATISFIABLE:
// ignore request for start past end of object
return new ByteArrayInputStream(new byte[0]);
case HTTP_NOT_FOUND:
throw new FileNotFoundException("File does not exist: " + path);
case HTTP_FORBIDDEN:
case HTTP_BAD_REQUEST:
throw new UnrecoverableS3OperationException(path, e);
}
}
throw e;
}
});
}
catch (Exception e) {
throw propagate(e);
}
}
private void closeStream()
{
if (in != null) {
abortStream(in);
in = null;
STATS.connectionReleased();
}
}
private void checkClosed()
throws IOException
{
if (closed.get()) {
throw new IOException(STREAM_IS_CLOSED);
}
}
private static void abortStream(InputStream in)
{
try {
if (in instanceof S3ObjectInputStream) {
((S3ObjectInputStream) in).abort();
}
else {
in.close();
}
}
catch (IOException | AbortedException ignored) {
// thrown if the current thread is in the interrupted state
}
}
private static RuntimeException propagate(Exception e)
throws IOException
{
if (e instanceof InterruptedException) {
Thread.currentThread().interrupt();
throw new InterruptedIOException();
}
throwIfInstanceOf(e, IOException.class);
throwIfUnchecked(e);
throw new IOException(e);
}
}
private static class PrestoS3OutputStream
extends FilterOutputStream
{
private final TransferManager transferManager;
private final String host;
private final String key;
private final File tempFile;
private final boolean sseEnabled;
private final PrestoS3SseType sseType;
private final String sseKmsKeyId;
private final CannedAccessControlList aclType;
private final StorageClass s3StorageClass;
private boolean closed;
public PrestoS3OutputStream(
AmazonS3 s3,
String host,
String key,
File tempFile,
boolean sseEnabled,
PrestoS3SseType sseType,
String sseKmsKeyId,
long multiPartUploadMinFileSize,
long multiPartUploadMinPartSize,
PrestoS3AclType aclType,
PrestoS3StorageClass s3StorageClass)
throws IOException
{
super(new BufferedOutputStream(Files.newOutputStream(requireNonNull(tempFile, "tempFile is null").toPath())));
transferManager = TransferManagerBuilder.standard()
.withS3Client(requireNonNull(s3, "s3 is null"))
.withMinimumUploadPartSize(multiPartUploadMinPartSize)
.withMultipartUploadThreshold(multiPartUploadMinFileSize).build();
requireNonNull(aclType, "aclType is null");
requireNonNull(s3StorageClass, "s3StorageClass is null");
this.aclType = aclType.getCannedACL();
this.host = requireNonNull(host, "host is null");
this.key = requireNonNull(key, "key is null");
this.tempFile = tempFile;
this.sseEnabled = sseEnabled;
this.sseType = requireNonNull(sseType, "sseType is null");
this.sseKmsKeyId = sseKmsKeyId;
this.s3StorageClass = s3StorageClass.getS3StorageClass();
log.debug("OutputStream for key '%s' using file: %s", key, tempFile);
}
@Override
public void close()
throws IOException
{
if (closed) {
return;
}
closed = true;
try {
super.close();
uploadObject();
}
finally {
if (!tempFile.delete()) {
log.warn("Could not delete temporary file: %s", tempFile);
}
// close transfer manager but keep underlying S3 client open
transferManager.shutdownNow(false);
}
}
private void uploadObject()
throws IOException
{
try {
log.debug("Starting upload for host: %s, key: %s, file: %s, size: %s", host, key, tempFile, tempFile.length());
STATS.uploadStarted();
PutObjectRequest request = new PutObjectRequest(host, key, tempFile);
if (sseEnabled) {
switch (sseType) {
case KMS:
if (sseKmsKeyId != null) {
request.withSSEAwsKeyManagementParams(new SSEAwsKeyManagementParams(sseKmsKeyId));
}
else {
request.withSSEAwsKeyManagementParams(new SSEAwsKeyManagementParams());
}
break;
case S3:
ObjectMetadata metadata = new ObjectMetadata();
metadata.setSSEAlgorithm(ObjectMetadata.AES_256_SERVER_SIDE_ENCRYPTION);
request.setMetadata(metadata);
break;
}
}
request.withStorageClass(s3StorageClass);
request.withCannedAcl(aclType);
Upload upload = transferManager.upload(request);
if (log.isDebugEnabled()) {
upload.addProgressListener(createProgressListener(upload));
}
upload.waitForCompletion();
STATS.uploadSuccessful();
log.debug("Completed upload for host: %s, key: %s", host, key);
}
catch (AmazonClientException e) {
STATS.uploadFailed();
throw new IOException(e);
}
catch (InterruptedException e) {
STATS.uploadFailed();
Thread.currentThread().interrupt();
throw new InterruptedIOException();
}
}
private ProgressListener createProgressListener(Transfer transfer)
{
return new ProgressListener()
{
private ProgressEventType previousType;
private double previousTransferred;
@Override
public synchronized void progressChanged(ProgressEvent progressEvent)
{
ProgressEventType eventType = progressEvent.getEventType();
if (previousType != eventType) {
log.debug("Upload progress event (%s/%s): %s", host, key, eventType);
previousType = eventType;
}
double transferred = transfer.getProgress().getPercentTransferred();
if (transferred >= (previousTransferred + 10.0)) {
log.debug("Upload percentage (%s/%s): %.0f%%", host, key, transferred);
previousTransferred = transferred;
}
}
};
}
}
@VisibleForTesting
AmazonS3 getS3Client()
{
return s3;
}
@VisibleForTesting
void setS3Client(AmazonS3 client)
{
s3 = client;
}
/**
* Helper function used to work around the fact that if you use an S3 bucket with an '_' that java.net.URI
* behaves differently and sets the host value to null whereas S3 buckets without '_' have a properly
* set host field. '_' is only allowed in S3 bucket names in us-east-1.
*
* @param uri The URI from which to extract a host value.
* @return The host value where uri.getAuthority() is used when uri.getHost() returns null as long as no UserInfo is present.
* @throws IllegalArgumentException If the bucket can not be determined from the URI.
*/
public static String getBucketName(URI uri)
{
if (uri.getHost() != null) {
return uri.getHost();
}
if (uri.getUserInfo() == null) {
return uri.getAuthority();
}
throw new IllegalArgumentException("Unable to determine S3 bucket from URI.");
}
public static PrestoS3FileSystemStats getFileSystemStats()
{
return STATS;
}
public static RequestMetricCollector getMetricsCollector()
{
return metricCollector;
}
public static void setMetricsCollector(RequestMetricCollector customMetricCollector)
{
metricCollector = customMetricCollector;
}
}