io.druid.storage.s3.S3DataSegmentMover.java Source code

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Here is the source code for io.druid.storage.s3.S3DataSegmentMover.java

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/*
 * Druid - a distributed column store.
 * Copyright 2012 - 2015 Metamarkets Group Inc.
 *
 * 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 io.druid.storage.s3;

import com.google.common.base.Predicate;
import com.google.common.base.Throwables;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Maps;
import com.google.inject.Inject;
import com.metamx.common.ISE;
import com.metamx.common.MapUtils;
import com.metamx.common.logger.Logger;
import io.druid.segment.loading.DataSegmentMover;
import io.druid.segment.loading.SegmentLoadingException;
import io.druid.timeline.DataSegment;
import org.jets3t.service.ServiceException;
import org.jets3t.service.acl.gs.GSAccessControlList;
import org.jets3t.service.impl.rest.httpclient.RestS3Service;
import org.jets3t.service.model.S3Object;

import java.util.Map;
import java.util.concurrent.Callable;

public class S3DataSegmentMover implements DataSegmentMover {
    private static final Logger log = new Logger(S3DataSegmentMover.class);

    private final RestS3Service s3Client;
    private final S3DataSegmentPusherConfig config;

    @Inject
    public S3DataSegmentMover(RestS3Service s3Client, S3DataSegmentPusherConfig config) {
        this.s3Client = s3Client;
        this.config = config;
    }

    @Override
    public DataSegment move(DataSegment segment, Map<String, Object> targetLoadSpec)
            throws SegmentLoadingException {
        try {
            Map<String, Object> loadSpec = segment.getLoadSpec();
            String s3Bucket = MapUtils.getString(loadSpec, "bucket");
            String s3Path = MapUtils.getString(loadSpec, "key");
            String s3DescriptorPath = S3Utils.descriptorPathForSegmentPath(s3Path);

            final String targetS3Bucket = MapUtils.getString(targetLoadSpec, "bucket");
            final String targetS3BaseKey = MapUtils.getString(targetLoadSpec, "baseKey");

            final String targetS3Path = S3Utils.constructSegmentPath(targetS3BaseKey, segment);
            String targetS3DescriptorPath = S3Utils.descriptorPathForSegmentPath(targetS3Path);

            if (targetS3Bucket.isEmpty()) {
                throw new SegmentLoadingException("Target S3 bucket is not specified");
            }
            if (targetS3Path.isEmpty()) {
                throw new SegmentLoadingException("Target S3 baseKey is not specified");
            }

            safeMove(s3Bucket, s3Path, targetS3Bucket, targetS3Path);
            safeMove(s3Bucket, s3DescriptorPath, targetS3Bucket, targetS3DescriptorPath);

            return segment.withLoadSpec(ImmutableMap.<String, Object>builder()
                    .putAll(Maps.filterKeys(loadSpec, new Predicate<String>() {
                        @Override
                        public boolean apply(String input) {
                            return !(input.equals("bucket") || input.equals("key"));
                        }
                    })).put("bucket", targetS3Bucket).put("key", targetS3Path).build());
        } catch (ServiceException e) {
            throw new SegmentLoadingException(e, "Unable to move segment[%s]: [%s]", segment.getIdentifier(), e);
        }
    }

    private void safeMove(final String s3Bucket, final String s3Path, final String targetS3Bucket,
            final String targetS3Path) throws ServiceException, SegmentLoadingException {
        try {
            S3Utils.retryS3Operation(new Callable<Void>() {
                @Override
                public Void call() throws Exception {
                    if (s3Client.isObjectInBucket(s3Bucket, s3Path)) {
                        if (s3Bucket.equals(targetS3Bucket) && s3Path.equals(targetS3Path)) {
                            log.info("No need to move file[s3://%s/%s] onto itself", s3Bucket, s3Path);
                        } else {
                            final S3Object[] list = s3Client.listObjects(s3Bucket, s3Path, "");
                            if (list.length == 0) {
                                // should never happen
                                throw new ISE("Unable to list object [s3://%s/%s]", s3Bucket, s3Path);
                            }
                            final S3Object s3Object = list[0];
                            if (s3Object.getStorageClass() != null
                                    && s3Object.getStorageClass().equals(S3Object.STORAGE_CLASS_GLACIER)) {
                                log.warn("Cannot move file[s3://%s/%s] of storage class glacier, skipping.",
                                        s3Bucket, s3Path);
                            } else {
                                log.info("Moving file[s3://%s/%s] to [s3://%s/%s]", s3Bucket, s3Path,
                                        targetS3Bucket, targetS3Path);
                                final S3Object target = new S3Object(targetS3Path);
                                if (!config.getDisableAcl()) {
                                    target.setAcl(GSAccessControlList.REST_CANNED_BUCKET_OWNER_FULL_CONTROL);
                                }
                                s3Client.moveObject(s3Bucket, s3Path, targetS3Bucket, target, false);
                            }
                        }
                    } else {
                        // ensure object exists in target location
                        if (s3Client.isObjectInBucket(targetS3Bucket, targetS3Path)) {
                            log.info(
                                    "Not moving file [s3://%s/%s], already present in target location [s3://%s/%s]",
                                    s3Bucket, s3Path, targetS3Bucket, targetS3Path);
                        } else {
                            throw new SegmentLoadingException(
                                    "Unable to move file [s3://%s/%s] to [s3://%s/%s], not present in either source or target location",
                                    s3Bucket, s3Path, targetS3Bucket, targetS3Path);
                        }
                    }
                    return null;
                }
            });
        } catch (Exception e) {
            Throwables.propagateIfInstanceOf(e, ServiceException.class);
            Throwables.propagateIfInstanceOf(e, SegmentLoadingException.class);
            throw Throwables.propagate(e);
        }
    }
}