net.librec.job.progress.ProgressReporter Maven / Gradle / Ivy

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/**
 * Copyright (C) 2016 LibRec
 * 
 * This file is part of LibRec.
 * LibRec is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 

 * LibRec is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with LibRec. If not, see .
 */
package net.librec.job.progress;

import net.librec.job.JobStatus;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.util.concurrent.atomic.AtomicBoolean;

/**
 * Progress Reporter
 *
 * @author YuFeng Wang
 */
public abstract class ProgressReporter implements Progressable, Runnable {
    private static final Log LOG = LogFactory.getLog(ProgressReporter.class);
    public static final int PROGRESS_INTERVAL = 1;
    private JobStatus jobStatus = new JobStatus();
    private Object lock = new Object();
    private AtomicBoolean taskDone = new AtomicBoolean(false);
    private AtomicBoolean progressFlag = new AtomicBoolean(false);

    /*
     * (non-Javadoc)
     *
     * @see java.lang.Runnable#run()
     */
    @Override
    public void run() {
        // get current flag value and reset it as well
        boolean sendProgress = resetProgressFlag();
        while (!taskDone.get()) {
            try {
                synchronized (lock) {
                    if (taskDone.get()) {
                        break;
                    }
                    lock.wait(PROGRESS_INTERVAL);
                    sendProgress = true;
                }
                if (sendProgress) {
                    this.progressx();
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    void setProgressFlag() {
        progressFlag.set(true);
    }

    boolean resetProgressFlag() {
        return progressFlag.getAndSet(false);
    }

    void setTaskFlag() {
        taskDone.set(true);
    }

    boolean resetTaskFlag() {
        return taskDone.getAndSet(false);
    }

    /**
     * @return the jobStatus
     */
    public JobStatus getJobStatus() {
        return jobStatus;
    }

    /**
     * progress
     */
    public void progressx() {
        progress();
//		LOG.info(jobStatus.getProgress());
    }
}