org.apache.druid.storage.azure.AzureTaskLogs.java Source code

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Here is the source code for org.apache.druid.storage.azure.AzureTaskLogs.java

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/*
 * 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.azure;

import com.google.common.base.Optional;
import com.google.common.base.Throwables;
import com.google.common.io.ByteSource;
import com.google.inject.Inject;
import com.microsoft.azure.storage.StorageException;
import org.apache.druid.java.util.common.IOE;
import org.apache.druid.java.util.common.StringUtils;
import org.apache.druid.java.util.common.logger.Logger;
import org.apache.druid.tasklogs.TaskLogs;

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

public class AzureTaskLogs implements TaskLogs {

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

    private final AzureTaskLogsConfig config;
    private final AzureStorage azureStorage;

    @Inject
    public AzureTaskLogs(AzureTaskLogsConfig config, AzureStorage azureStorage) {
        this.config = config;
        this.azureStorage = azureStorage;
    }

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

    @Override
    public void pushTaskReports(String taskid, File reportFile) throws IOException {
        final String taskKey = getTaskReportsKey(taskid);
        log.info("Pushing task reports %s to: %s", reportFile, taskKey);
        pushTaskFile(taskid, reportFile, taskKey);
    }

    private void pushTaskFile(final String taskId, final File logFile, String taskKey) {
        try {
            AzureUtils.retryAzureOperation(() -> {
                azureStorage.uploadBlob(logFile, config.getContainer(), taskKey);
                return null;
            }, config.getMaxTries());
        } catch (Exception e) {
            throw Throwables.propagate(e);
        }
    }

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

    @Override
    public Optional<ByteSource> streamTaskReports(String taskid) throws IOException {
        return streamTaskFile(taskid, 0, getTaskReportsKey(taskid));
    }

    private Optional<ByteSource> streamTaskFile(final String taskid, final long offset, String taskKey)
            throws IOException {
        final String container = config.getContainer();

        try {
            if (!azureStorage.getBlobExists(container, taskKey)) {
                return Optional.absent();
            }

            return Optional.of(new ByteSource() {
                @Override
                public InputStream openStream() throws IOException {
                    try {
                        final long start;
                        final long length = azureStorage.getBlobLength(container, taskKey);

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

                        InputStream stream = azureStorage.getBlobInputStream(container, taskKey);
                        stream.skip(start);

                        return stream;

                    } catch (Exception e) {
                        throw new IOException(e);
                    }
                }
            });
        } catch (StorageException | URISyntaxException e) {
            throw new IOE(e, "Failed to stream logs from: %s", taskKey);
        }
    }

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

    private String getTaskReportsKey(String taskid) {
        return StringUtils.format("%s/%s/report.json", config.getPrefix(), taskid);
    }

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

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