/* * 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; /** * TODO(moon) : add description. */ public class JobProgressPoller extends Thread { public static final long DEFAULT_INTERVAL_MSEC = 500; Logger logger = LoggerFactory.getLogger(JobProgressPoller.class); private Job job; private long intervalMs; boolean terminate = false; public JobProgressPoller(Job job, long intervalMs) { this.job = job; this.intervalMs = intervalMs; } @Override public void run() { if (intervalMs < 0) { return; } else if (intervalMs == 0) { intervalMs = DEFAULT_INTERVAL_MSEC; } while (terminate == false) { 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); } } try { Thread.sleep(intervalMs); } catch (InterruptedException e) { } } } public void terminate() { terminate = true; } }