io.druid.storage.oss.OssDataSegmentMover.java Source code

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Here is the source code for io.druid.storage.oss.OssDataSegmentMover.java

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/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets 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 io.druid.storage.oss;

import com.aliyun.oss.OSSClient;
import com.aliyun.oss.model.OSSObject;
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.StringUtils;
import com.metamx.common.logger.Logger;
import io.druid.segment.loading.DataSegmentMover;
import io.druid.segment.loading.SegmentLoadingException;
import io.druid.timeline.DataSegment;

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

public class OssDataSegmentMover implements DataSegmentMover {

    private static final Logger log = new Logger(OssDataSegmentMover.class);

    private final OSSClient ossClient;
    private final OssDataSegmentPusherConfig config;

    @Inject
    public OssDataSegmentMover(OSSClient ossClient, OssDataSegmentPusherConfig config) {
        this.ossClient = ossClient;
        this.config = config;
    }

    @Override
    public DataSegment move(DataSegment segment, Map<String, Object> targetLoadSpec)
            throws SegmentLoadingException {

        Map<String, Object> loadSpec = segment.getLoadSpec();
        String srcBucket = MapUtils.getString(loadSpec, "bucket");
        String srcKey = MapUtils.getString(loadSpec, "key");
        String srcDescPath = OssUtils.descriptorPathForSegmentPath(srcKey);

        final String dstBucket = MapUtils.getString(targetLoadSpec, "bucket");
        final String dstKey = MapUtils.getString(targetLoadSpec, "baseKey");
        final String targetOssPath = OssUtils.constructSegmentPath(dstKey, segment);
        String targetOssDescriptorPath = OssUtils.descriptorPathForSegmentPath(targetOssPath);

        if (dstBucket.isEmpty()) {
            throw new SegmentLoadingException("target oss bucket is not specified");
        }
        if (targetOssPath.isEmpty()) {
            throw new SegmentLoadingException("target oss key is not specified");
        }

        safeMove(srcBucket, srcKey, dstBucket, targetOssPath);
        safeMove(srcBucket, srcDescPath, dstBucket, targetOssDescriptorPath);

        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", dstBucket).put("key", targetOssPath).build());
    }

    private void safeMove(final String srcBucket, final String srcKey, final String dstBucket, final String dstKey)
            throws SegmentLoadingException {

        try {
            OssUtils.retryOssOperation(new Callable<Void>() {
                @Override
                public Void call() throws Exception {

                    final String movePath = StringUtils.safeFormat("[%s/%s] to [%s/%s]", srcBucket, srcKey,
                            dstBucket, dstKey);

                    if (srcBucket.equals(dstBucket) && srcKey.equals(dstKey)) {
                        log.info("no need to move file[%s/%s] into itself", srcBucket, srcKey);
                        return null;
                    }

                    if (ossClient.doesObjectExist(srcBucket, srcKey)) {

                        final OSSObject ossObject = ossClient.getObject(srcBucket, srcKey);

                        if (ossObject == null) {
                            throw new ISE("unable to get object [%s/%s]", srcBucket, srcKey);
                        }

                        log.info("moving file %s", movePath);

                        //  copy object to dst bucket
                        ossClient.copyObject(srcBucket, srcKey, dstBucket, dstKey);

                        //  if dst exists object then delete src object
                        if (ossClient.doesObjectExist(dstBucket, dstKey)) {
                            ossClient.deleteObject(srcBucket, srcKey);
                        } else {
                            throw new SegmentLoadingException("unable to copy file %s, will retry", movePath);
                        }
                    } else {
                        // ensure object exists in target location
                        if (ossClient.doesObjectExist(dstBucket, dstKey)) {
                            log.info("not moving file [%s/%s], already present in target location [%s/%s]",
                                    srcBucket, srcKey, dstBucket, dstKey);
                        } else {
                            throw new SegmentLoadingException(
                                    "unable to move file %s, not present in either source or target location",
                                    movePath);
                        }
                    }
                    return null;
                }
            });
        } catch (Exception e) {
            Throwables.propagateIfInstanceOf(e, SegmentLoadingException.class);
            throw Throwables.propagate(e);
        }
    }
}