com.metamx.druid.utils.CompressionUtils.java Source code

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Here is the source code for com.metamx.druid.utils.CompressionUtils.java

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/*
 * Druid - a distributed column store.
 * Copyright (C) 2012  Metamarkets Group Inc.
 *
 * This program 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 2
 * 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 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 com.metamx.druid.utils;

import com.google.common.io.ByteStreams;
import com.google.common.io.Closeables;
import com.google.common.io.Files;
import com.metamx.common.ISE;
import com.metamx.common.StreamUtils;
import com.metamx.common.logger.Logger;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.GZIPInputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

/**
 */
public class CompressionUtils {
    private static final Logger log = new Logger(CompressionUtils.class);

    public static long zip(File directory, File outputZipFile) throws IOException {
        if (!outputZipFile.getName().endsWith(".zip")) {
            log.warn("No .zip suffix[%s], putting files from [%s] into it anyway.", outputZipFile, directory);
        }

        final FileOutputStream out = new FileOutputStream(outputZipFile);
        try {
            final long retVal = zip(directory, out);

            out.close();

            return retVal;
        } finally {
            Closeables.closeQuietly(out);
        }
    }

    public static long zip(File directory, OutputStream out) throws IOException {
        if (!directory.isDirectory()) {
            throw new IOException(String.format("directory[%s] is not a directory", directory));
        }

        long totalSize = 0;
        ZipOutputStream zipOut = null;
        try {
            zipOut = new ZipOutputStream(out);
            File[] files = directory.listFiles();
            for (File file : files) {
                log.info("Adding file[%s] with size[%,d].  Total size so far[%,d]", file, file.length(), totalSize);
                if (file.length() >= Integer.MAX_VALUE) {
                    zipOut.finish();
                    throw new IOException(String.format("file[%s] too large [%,d]", file, file.length()));
                }
                zipOut.putNextEntry(new ZipEntry(file.getName()));
                totalSize += ByteStreams.copy(Files.newInputStreamSupplier(file), zipOut);
            }
            zipOut.closeEntry();
        } finally {
            if (zipOut != null) {
                zipOut.finish();
            }
        }

        return totalSize;
    }

    public static void unzip(File pulledFile, File outDir) throws IOException {
        if (!(outDir.exists() && outDir.isDirectory())) {
            throw new ISE("outDir[%s] must exist and be a directory", outDir);
        }

        log.info("Unzipping file[%s] to [%s]", pulledFile, outDir);
        InputStream in = null;
        try {
            in = new BufferedInputStream(new FileInputStream(pulledFile));
            unzip(in, outDir);
        } finally {
            Closeables.closeQuietly(in);
        }
    }

    public static void unzip(InputStream in, File outDir) throws IOException {
        ZipInputStream zipIn = new ZipInputStream(in);

        ZipEntry entry;
        while ((entry = zipIn.getNextEntry()) != null) {
            FileOutputStream out = null;
            try {
                out = new FileOutputStream(new File(outDir, entry.getName()));
                ByteStreams.copy(zipIn, out);
                zipIn.closeEntry();
                out.close();
            } finally {
                Closeables.closeQuietly(out);
            }
        }
    }

    public static void gunzip(File pulledFile, File outDir) throws IOException {
        log.info("Gunzipping file[%s] to [%s]", pulledFile, outDir);
        StreamUtils.copyToFileAndClose(new GZIPInputStream(new FileInputStream(pulledFile)), outDir);
        if (!pulledFile.delete()) {
            log.error("Could not delete tmpFile[%s].", pulledFile);
        }
    }

}