/* * 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.zeppelin.scheduler; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Polls job progress with given interval * * @see Job#progress() * @see JobListener#onProgressUpdate(org.apache.zeppelin.scheduler.Job, int) * * TODO(moon) : add description. */ public class JobProgressPoller extends Thread { public static final long DEFAULT_INTERVAL_MSEC = 500; private static final Logger logger = LoggerFactory.getLogger(JobProgressPoller.class); private Job job; private long intervalMs; public JobProgressPoller(Job job, long intervalMs) { super("JobProgressPoller, jobId=" + job.getId()); this.job = job; if (intervalMs < 0) { throw new IllegalArgumentException("polling interval can't be " + intervalMs); } this.intervalMs = intervalMs == 0 ? DEFAULT_INTERVAL_MSEC : intervalMs; } @Override public void run() { try { while (!Thread.interrupted()) { JobListener listener = job.getListener(); if (listener != null) { try { if (job.isRunning()) { listener.onProgressUpdate(job, job.progress()); } } catch (Exception e) { logger.error("Can not get or update progress", e); } } Thread.sleep(intervalMs); } } catch (InterruptedException ignored) {} } }