| /** |
| * 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.hadoop.yarn.server.timelineservice.storage; |
| |
| import java.io.BufferedWriter; |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.OutputStreamWriter; |
| import java.io.PrintWriter; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.service.AbstractService; |
| import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEntities; |
| import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEntity; |
| import org.apache.hadoop.yarn.api.records.timelineservice.TimelineWriteResponse; |
| import org.apache.hadoop.yarn.api.records.timelineservice.TimelineWriteResponse.TimelineWriteError; |
| import org.apache.hadoop.yarn.conf.YarnConfiguration; |
| import org.apache.hadoop.yarn.server.timelineservice.collector.TimelineCollectorContext; |
| import org.apache.hadoop.yarn.util.timeline.TimelineUtils; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| |
| /** |
| * This implements a local file based backend for storing application timeline |
| * information. This implementation may not provide a complete implementation of |
| * all the necessary features. This implementation is provided solely for basic |
| * testing purposes, and should not be used in a non-test situation. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Unstable |
| public class FileSystemTimelineWriterImpl extends AbstractService |
| implements TimelineWriter { |
| |
| private String outputRoot; |
| |
| /** Config param for timeline service storage tmp root for FILE YARN-3264. */ |
| public static final String TIMELINE_SERVICE_STORAGE_DIR_ROOT |
| = YarnConfiguration.TIMELINE_SERVICE_PREFIX + "fs-writer.root-dir"; |
| |
| public static final String ENTITIES_DIR = "entities"; |
| |
| /** Default extension for output files. */ |
| public static final String TIMELINE_SERVICE_STORAGE_EXTENSION = ".thist"; |
| |
| /** default value for storage location on local disk. */ |
| private static final String STORAGE_DIR_ROOT = "timeline_service_data"; |
| |
| FileSystemTimelineWriterImpl() { |
| super((FileSystemTimelineWriterImpl.class.getName())); |
| } |
| |
| @Override |
| public TimelineWriteResponse write(TimelineCollectorContext context, |
| TimelineEntities entities, UserGroupInformation callerUgi) |
| throws IOException { |
| TimelineWriteResponse response = new TimelineWriteResponse(); |
| String clusterId = context.getClusterId(); |
| String userId = context.getUserId(); |
| String flowName = context.getFlowName(); |
| String flowVersion = context.getFlowVersion(); |
| long flowRunId = context.getFlowRunId(); |
| String appId = context.getAppId(); |
| |
| for (TimelineEntity entity : entities.getEntities()) { |
| write(clusterId, userId, flowName, flowVersion, flowRunId, appId, entity, |
| response); |
| } |
| return response; |
| } |
| |
| private synchronized void write(String clusterId, String userId, |
| String flowName, String flowVersion, long flowRun, String appId, |
| TimelineEntity entity, TimelineWriteResponse response) |
| throws IOException { |
| PrintWriter out = null; |
| try { |
| String dir = mkdirs(outputRoot, ENTITIES_DIR, clusterId, userId, |
| escape(flowName), escape(flowVersion), String.valueOf(flowRun), appId, |
| entity.getType()); |
| String fileName = dir + entity.getId() + |
| TIMELINE_SERVICE_STORAGE_EXTENSION; |
| out = |
| new PrintWriter(new BufferedWriter(new OutputStreamWriter( |
| new FileOutputStream(fileName, true), "UTF-8"))); |
| out.println(TimelineUtils.dumpTimelineRecordtoJSON(entity)); |
| out.write("\n"); |
| } catch (IOException ioe) { |
| TimelineWriteError error = new TimelineWriteError(); |
| error.setEntityId(entity.getId()); |
| error.setEntityType(entity.getType()); |
| /* |
| * TODO: set an appropriate error code after PoC could possibly be: |
| * error.setErrorCode(TimelineWriteError.IO_EXCEPTION); |
| */ |
| response.addError(error); |
| } finally { |
| if (out != null) { |
| out.close(); |
| } |
| } |
| } |
| |
| @Override |
| public TimelineWriteResponse aggregate(TimelineEntity data, |
| TimelineAggregationTrack track) throws IOException { |
| return null; |
| |
| } |
| |
| @VisibleForTesting |
| String getOutputRoot() { |
| return outputRoot; |
| } |
| |
| @Override |
| public void serviceInit(Configuration conf) throws Exception { |
| outputRoot = conf.get(TIMELINE_SERVICE_STORAGE_DIR_ROOT, |
| conf.get("hadoop.tmp.dir") + File.separator + STORAGE_DIR_ROOT); |
| } |
| |
| @Override |
| public void serviceStart() throws Exception { |
| mkdirs(outputRoot, ENTITIES_DIR); |
| } |
| |
| @Override |
| public void flush() throws IOException { |
| // no op |
| } |
| |
| private static String mkdirs(String... dirStrs) throws IOException { |
| StringBuilder path = new StringBuilder(); |
| for (String dirStr : dirStrs) { |
| path.append(dirStr).append(File.separatorChar); |
| File dir = new File(path.toString()); |
| if (!dir.exists()) { |
| if (!dir.mkdirs()) { |
| throw new IOException("Could not create directories for " + dir); |
| } |
| } |
| } |
| return path.toString(); |
| } |
| |
| // specifically escape the separator character |
| private static String escape(String str) { |
| return str.replace(File.separatorChar, '_'); |
| } |
| } |