net.pms.io.ByteProcessWrapperConsumer.java Source code

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Here is the source code for net.pms.io.ByteProcessWrapperConsumer.java

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/*
 * Digital Media Server, for streaming digital media to DLNA compatible devices
 * based on www.ps3mediaserver.org and www.universalmediaserver.com.
 * Copyright (C) 2016 Digital Media Server developers.
 *
 * This program is a 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; version 2
 * of the License only.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package net.pms.io;

import static org.apache.commons.lang3.StringUtils.isBlank;
import java.io.InputStream;
import java.util.concurrent.Callable;
import java.util.concurrent.FutureTask;
import javax.annotation.Nullable;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * A {@link ProcessWrapperConsumer} implementation that return the process
 * output as an array of bytes wrapped in a {@link ByteProcessWrapperResult}.
 *
 * @author Nadahar
 */
public class ByteProcessWrapperConsumer implements ProcessWrapperConsumer<ByteProcessWrapperResult, byte[]> {

    private static final Logger LOGGER = LoggerFactory.getLogger(ByteProcessWrapperConsumer.class);

    @Override
    @Nullable
    public FutureTask<byte[]> consume(InputStream inputStream) {
        return consume(inputStream, null);
    }

    @Override
    @Nullable
    public FutureTask<byte[]> consume(@Nullable final InputStream inputStream, @Nullable String threadName) {
        if (inputStream == null) {
            return null;
        }
        Callable<byte[]> callable = new Callable<byte[]>() {

            @Override
            public byte[] call() throws Exception {
                byte[] result = IOUtils.toByteArray(inputStream);
                if (LOGGER.isTraceEnabled()) {
                    LOGGER.trace("Captured {} bytes of process output", result.length);
                }
                return result;
            }
        };
        FutureTask<byte[]> result = new FutureTask<byte[]>(callable);
        Thread runner;
        if (isBlank(threadName)) {
            runner = new Thread(result);
        } else {
            runner = new Thread(result, threadName);
        }
        runner.start();
        return result;
    }

    @Override
    public ByteProcessWrapperResult createResult(@Nullable byte[] output, int exitCode,
            @Nullable Throwable throwable) {
        return new ByteProcessWrapperResult(output, exitCode, throwable);
    }
}