org.apache.druid.storage.s3.S3TimestampVersionedDataFinder Maven / Gradle / Ivy
/*
* 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.druid.storage.s3;
import com.amazonaws.services.s3.model.S3ObjectSummary;
import com.google.inject.Inject;
import org.apache.druid.data.SearchableVersionedDataFinder;
import org.apache.druid.data.input.impl.CloudObjectLocation;
import org.apache.druid.java.util.common.StringUtils;
import javax.annotation.Nullable;
import java.net.URI;
import java.util.Collections;
import java.util.Iterator;
import java.util.regex.Pattern;
public class S3TimestampVersionedDataFinder extends S3DataSegmentPuller implements SearchableVersionedDataFinder
{
private static final int MAX_LISTING_KEYS = 1000;
@Inject
public S3TimestampVersionedDataFinder(ServerSideEncryptingAmazonS3 s3Client)
{
super(s3Client);
}
/**
* Gets the key with the most recently modified timestamp.
* `pattern` is evaluated against the entire key AFTER the path given in `uri`.
* The substring `pattern` is matched against will have a leading `/` removed.
* For example `s3://some_bucket/some_prefix/some_key` with a URI of `s3://some_bucket/some_prefix` will match against `some_key`.
* `s3://some_bucket/some_prefixsome_key` with a URI of `s3://some_bucket/some_prefix` will match against `some_key`
* `s3://some_bucket/some_prefix//some_key` with a URI of `s3://some_bucket/some_prefix` will match against `/some_key`
*
* @param uri The URI of in the form of `s3://some_bucket/some_key`
* @param pattern The pattern matcher to determine if a *key* is of interest, or `null` to match everything.
*
* @return A URI to the most recently modified object which matched the pattern.
*/
@Override
public URI getLatestVersion(final URI uri, final @Nullable Pattern pattern)
{
try {
final CloudObjectLocation coords = new CloudObjectLocation(S3Utils.checkURI(uri));
long mostRecent = Long.MIN_VALUE;
URI latest = null;
final Iterator objectSummaryIterator = S3Utils.objectSummaryIterator(
s3Client,
Collections.singletonList(uri),
MAX_LISTING_KEYS
);
while (objectSummaryIterator.hasNext()) {
final S3ObjectSummary objectSummary = objectSummaryIterator.next();
final CloudObjectLocation objectLocation = S3Utils.summaryToCloudObjectLocation(objectSummary);
// remove coords path prefix from object path
String keyString = StringUtils.maybeRemoveLeadingSlash(
objectLocation.getPath().substring(coords.getPath().length())
);
if (pattern != null && !pattern.matcher(keyString).matches()) {
continue;
}
final long latestModified = objectSummary.getLastModified().getTime();
if (latestModified >= mostRecent) {
mostRecent = latestModified;
latest = objectLocation.toUri(S3StorageDruidModule.SCHEME);
}
}
return latest;
}
catch (Exception e) {
throw new RuntimeException(e);
}
}
}