fr.gael.dhus.util.DownloadStreamCloserListener.java Source code

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Here is the source code for fr.gael.dhus.util.DownloadStreamCloserListener.java

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/*
 * Data Hub Service (DHuS) - For Space data distribution.
 * Copyright (C) 2013,2014,2015 GAEL Systems
 *
 * This file is part of DHuS software sources.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package fr.gael.dhus.util;

import org.apache.commons.net.io.CopyStreamEvent;
import org.apache.commons.net.io.CopyStreamListener;
import org.apache.log4j.Logger;

import java.io.IOException;
import java.io.InputStream;

public class DownloadStreamCloserListener implements CopyStreamListener {
    private static final Logger LOGGER = Logger.getLogger(DownloadStreamCloserListener.class);

    private final InputStream stream;

    public DownloadStreamCloserListener(InputStream stream) {
        if (stream == null) {
            throw new IllegalArgumentException("Stream can not be null !");
        }
        this.stream = stream;
    }

    @Override
    public void bytesTransferred(CopyStreamEvent event) {
        bytesTransferred(event.getTotalBytesTransferred(), event.getBytesTransferred(), event.getStreamSize());
    }

    @Override
    public void bytesTransferred(long total_bytes_transferred, int bytes_transferred, long stream_size) {
        if (bytes_transferred == -1) {
            try {
                this.stream.close();
            } catch (IOException e) {
                LOGGER.warn("Can not close the stream !");
            }
        }
    }
}