| /* |
| * 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.giraph.worker; |
| |
| import org.apache.giraph.job.JobProgressTracker; |
| import org.apache.giraph.utils.ThreadUtils; |
| import org.apache.log4j.Logger; |
| |
| /** |
| * Class which periodically writes worker's progress to zookeeper |
| */ |
| public class WorkerProgressWriter { |
| /** Class logger */ |
| private static final Logger LOG = |
| Logger.getLogger(WorkerProgressWriter.class); |
| /** How often to update worker's progress */ |
| private static final int WRITE_UPDATE_PERIOD_MILLISECONDS = 10 * 1000; |
| |
| /** Job progress tracker */ |
| private final JobProgressTracker jobProgressTracker; |
| /** Thread which writes worker's progress */ |
| private final Thread writerThread; |
| /** Whether worker finished application */ |
| private volatile boolean finished = false; |
| |
| /** |
| * Constructor, starts separate thread to periodically update worker's |
| * progress |
| * |
| * @param jobProgressTracker JobProgressTracker to report job progress to |
| */ |
| public WorkerProgressWriter(JobProgressTracker jobProgressTracker) { |
| this.jobProgressTracker = jobProgressTracker; |
| writerThread = ThreadUtils.startThread(new Runnable() { |
| @Override |
| public void run() { |
| while (!finished) { |
| updateAndSendProgress(); |
| double factor = 1 + Math.random(); |
| if (!ThreadUtils.trySleep( |
| (long) (WRITE_UPDATE_PERIOD_MILLISECONDS * factor))) { |
| break; |
| } |
| } |
| } |
| }, "workerProgressThread"); |
| } |
| |
| /** |
| * Update worker progress and send it |
| */ |
| private void updateAndSendProgress() { |
| WorkerProgress.get().updateMemory(); |
| jobProgressTracker.updateProgress(WorkerProgress.get()); |
| } |
| |
| /** |
| * Stop the thread which writes worker's progress |
| */ |
| public void stop() throws InterruptedException { |
| finished = true; |
| writerThread.interrupt(); |
| writerThread.join(); |
| updateAndSendProgress(); |
| } |
| } |