io.druid.storage.s3.S3TaskLogs.java Source code

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Here is the source code for io.druid.storage.s3.S3TaskLogs.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.s3;

import com.amazonaws.AmazonServiceException;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.model.AmazonS3Exception;
import com.amazonaws.services.s3.model.GetObjectRequest;
import com.amazonaws.services.s3.model.ObjectMetadata;
import com.google.common.base.Optional;
import com.google.common.base.Throwables;
import com.google.common.io.ByteSource;
import com.google.inject.Inject;
import io.druid.java.util.common.IOE;
import io.druid.java.util.common.StringUtils;
import io.druid.java.util.common.logger.Logger;
import io.druid.tasklogs.TaskLogs;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;

/**
 * Provides task logs archived on S3.
 */
public class S3TaskLogs implements TaskLogs {
    private static final Logger log = new Logger(S3TaskLogs.class);

    private final AmazonS3 service;
    private final S3TaskLogsConfig config;

    @Inject
    public S3TaskLogs(S3TaskLogsConfig config, AmazonS3 service) {
        this.config = config;
        this.service = service;
    }

    @Override
    public Optional<ByteSource> streamTaskLog(final String taskid, final long offset) throws IOException {
        final String taskKey = getTaskLogKey(taskid);

        try {
            final ObjectMetadata objectMetadata = service.getObjectMetadata(config.getS3Bucket(), taskKey);

            return Optional.of(new ByteSource() {
                @Override
                public InputStream openStream() throws IOException {
                    try {
                        final long start;
                        final long end = objectMetadata.getContentLength() - 1;

                        if (offset > 0 && offset < objectMetadata.getContentLength()) {
                            start = offset;
                        } else if (offset < 0 && (-1 * offset) < objectMetadata.getContentLength()) {
                            start = objectMetadata.getContentLength() + offset;
                        } else {
                            start = 0;
                        }

                        final GetObjectRequest request = new GetObjectRequest(config.getS3Bucket(), taskKey)
                                .withMatchingETagConstraint(objectMetadata.getETag()).withRange(start, end);

                        return service.getObject(request).getObjectContent();
                    } catch (AmazonServiceException e) {
                        throw new IOException(e);
                    }
                }
            });
        } catch (AmazonS3Exception e) {
            if (404 == e.getStatusCode() || "NoSuchKey".equals(e.getErrorCode())
                    || "NoSuchBucket".equals(e.getErrorCode())) {
                return Optional.absent();
            } else {
                throw new IOE(e, "Failed to stream logs from: %s", taskKey);
            }
        }
    }

    @Override
    public void pushTaskLog(final String taskid, final File logFile) throws IOException {
        final String taskKey = getTaskLogKey(taskid);
        log.info("Pushing task log %s to: %s", logFile, taskKey);

        try {
            S3Utils.retryS3Operation(() -> {
                service.putObject(config.getS3Bucket(), taskKey, logFile);
                return null;
            });
        } catch (Exception e) {
            Throwables.propagateIfInstanceOf(e, IOException.class);
            throw Throwables.propagate(e);
        }
    }

    private String getTaskLogKey(String taskid) {
        return StringUtils.format("%s/%s/log", config.getS3Prefix(), taskid);
    }

    @Override
    public void killAll() {
        throw new UnsupportedOperationException("not implemented");
    }

    @Override
    public void killOlderThan(long timestamp) {
        throw new UnsupportedOperationException("not implemented");
    }
}