org.mashupmedia.encode.ProcessManager.java Source code

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Here is the source code for org.mashupmedia.encode.ProcessManager.java

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/*
 *  This file is part of MashupMedia.
 *
 *  MashupMedia 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.
 *
 *  MashupMedia 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 MashupMedia.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.mashupmedia.encode;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.math.NumberUtils;
import org.apache.log4j.Logger;
import org.mashupmedia.service.ConfigurationManager;
import org.mashupmedia.task.EncodeMediaItemTaskManager;
import org.mashupmedia.util.MediaItemHelper.MediaContentType;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class ProcessManager {
    private static Logger logger = Logger.getLogger(ProcessManager.class);

    public final static String KEY_TOTAL_FFMPEG_PROCESSES = "totalFfMpegProcesses";
    public final static int DEFAULT_TOTAL_FFMPEG_PROCESSES = 3;

    @Autowired
    private ConfigurationManager configurationManager;

    @Autowired
    private EncodeMediaItemTaskManager encodeMediaItemTaskManager;

    private List<ProcessQueueItem> processQueueItems = new CopyOnWriteArrayList<ProcessQueueItem>();

    public Iterator<ProcessQueueItem> getProcessQueueItemsIterator() {
        if (processQueueItems == null) {
            return null;
        }

        return processQueueItems.iterator();
    }

    public String callProcess(String path) throws IOException {
        List<String> commands = new ArrayList<String>();
        commands.add(path);

        String textOutput = callProcess(commands);
        return textOutput;
    }

    public int getMaximumConcurrentProcesses() {
        int totalFfMpegProcesses = NumberUtils
                .toInt(configurationManager.getConfigurationValue(KEY_TOTAL_FFMPEG_PROCESSES));
        return totalFfMpegProcesses;
    }

    public void addProcessToQueue(List<String> commands, long mediaItemId, MediaContentType mediaContentType) {
        ProcessQueueItem processQueueItem = generateProcessQueueItem(mediaItemId, mediaContentType, commands);
        if (processQueueItems.contains(processQueueItem)) {
            logger.info("Media is already queued for encoding: " + processQueueItem.toString());
            return;
        }

        processQueueItems.add(processQueueItem);
    }

    protected ProcessQueueItem generateProcessQueueItem(long mediaItemId, MediaContentType mediaContentType,
            List<String> commands) {

        ProcessQueueItem processQueueItem = new ProcessQueueItem(mediaItemId, mediaContentType, commands);
        return processQueueItem;
    }

    public void startProcess(ProcessQueueItem processQueueItem) throws IOException {

        try {
            logger.info("Starting process...");
            List<String> commands = processQueueItem.getCommands();

            ProcessBuilder processBuilder = new ProcessBuilder(commands);
            processBuilder.redirectErrorStream(true);
            Process process = processBuilder.start();

            // The started on date should have already been set
            Date startedOn = processQueueItem.getProcessStartedOn();
            if (startedOn == null) {
                processQueueItem.setProcessStartedOn(new Date());
            }

            processQueueItem.setProcess(process);

            InputStream inputStream = process.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
            String line;

            while ((line = bufferedReader.readLine()) != null) {
                logger.info(line);
            }
            IOUtils.closeQuietly(inputStream);

            try {
                int waitForValue = process.waitFor();
                logger.info("Process waitFor value = " + waitForValue);
            } catch (InterruptedException e) {
                logger.error("Error waiting for waitFor.", e);
            }

            int exitValue = process.exitValue();
            logger.info("Process exit value = " + exitValue);

        } finally {
            processQueueItems.remove(processQueueItem);
            encodeMediaItemTaskManager.processQueue();
        }

    }

    protected ProcessQueueItem getNextProcessQueueItem() {
        if (processQueueItems == null || processQueueItems.isEmpty()) {
            return null;
        }

        return processQueueItems.get(0);
    }

    public String callProcess(List<String> commands) throws IOException {

        logger.info("Starting process...");

        ProcessBuilder processBuilder = new ProcessBuilder(commands);
        processBuilder.redirectErrorStream(true);
        Process process = processBuilder.start();

        InputStream inputStream = process.getInputStream();
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
        String line;

        StringBuilder outputBuilder = new StringBuilder();

        while ((line = bufferedReader.readLine()) != null) {
            logger.info(line);
            outputBuilder.append(line);
        }
        IOUtils.closeQuietly(inputStream);

        try {
            int waitForValue = process.waitFor();
            logger.info("Process waitFor value = " + waitForValue);
        } catch (InterruptedException e) {
            logger.error("Error waiting for waitFor.", e);
        }

        int exitValue = process.exitValue();
        logger.info("Process exit value = " + exitValue);

        return outputBuilder.toString();

    }

    // public boolean isEncoding(long mediaItemId, MediaContentType
    // mediaContentType) {
    //
    // ProcessQueueItem processQueueItem = getProcessQueueItem(mediaItemId,
    // mediaContentType);
    // if (processQueueItem == null) {
    // return false;
    // }
    // // if (processQueueItem != null) {
    // // return true;
    // // }
    //
    // Process process = processQueueItem.getProcess();
    // if (process == null) {
    // return false;
    // }
    //
    // return true;
    // }

    private ProcessQueueItem getProcessQueueItem(long mediaItemId, MediaContentType mediaContentType) {
        if (processQueueItems == null || processQueueItems.isEmpty()) {
            return null;
        }

        for (ProcessQueueItem processQueueItem : processQueueItems) {
            if (processQueueItem.getMediaItemId() == mediaItemId
                    && processQueueItem.getMediaContentType() == mediaContentType) {
                return processQueueItem;
            }

        }

        return null;

    }

    public boolean killProcess(long mediaItemId, MediaContentType mediaContentType) {

        ProcessQueueItem processQueueItem = getProcessQueueItem(mediaItemId, mediaContentType);
        if (processQueueItem == null) {
            return false;
        }

        Process process = processQueueItem.getProcess();
        if (process != null) {
            process.destroy();
        }

        boolean isRemoved = processQueueItems.remove(processQueueItem);
        return isRemoved;
    }

    public void killProcesses(long mediaItemId) {

        List<ProcessQueueItem> processQueueItemsToBeDeleted = getProcessQueueItems(mediaItemId);
        if (processQueueItemsToBeDeleted == null || processQueueItemsToBeDeleted.isEmpty()) {
            return;
        }

        for (ProcessQueueItem processQueueItem : processQueueItemsToBeDeleted) {
            Process process = processQueueItem.getProcess();
            if (process != null) {
                process.destroy();
            }

            processQueueItemsToBeDeleted.remove(processQueueItem);
        }
    }

    protected List<ProcessQueueItem> getProcessQueueItems(long mediaItemId) {

        if (mediaItemId == 0) {
            return null;
        }
        List<ProcessQueueItem> matchingProcessQueueItems = new ArrayList<ProcessQueueItem>();

        if (processQueueItems == null || processQueueItems.isEmpty()) {
            return matchingProcessQueueItems;
        }

        for (ProcessQueueItem processQueueItem : processQueueItems) {
            if (processQueueItem.getMediaItemId() == mediaItemId) {
                matchingProcessQueueItems.add(processQueueItem);
            }
        }

        return matchingProcessQueueItems;
    }

    public boolean moveProcess(int index, long mediaItemId, MediaContentType mediaContentType) {

        if (processQueueItems == null || processQueueItems.isEmpty()) {
            return false;
        }

        if (index < 0 || (index > processQueueItems.size() - 1)) {
            return false;
        }

        ProcessQueueItem processQueueItem = getProcessQueueItem(mediaItemId, mediaContentType);
        if (processQueueItem == null) {
            return false;
        }

        processQueueItems.remove(processQueueItem);
        processQueueItems.add(index, processQueueItem);
        return true;
    }

}