com.netflix.exhibitor.core.backup.TempCompressedFile.java Source code

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Here is the source code for com.netflix.exhibitor.core.backup.TempCompressedFile.java

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/*
 * Copyright 2012 Netflix, Inc.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package com.netflix.exhibitor.core.backup;

import com.google.common.io.Closeables;
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.GZIPOutputStream;

class TempCompressedFile {
    private final File tempFile;
    private final File source;

    private static final int BUFFER_SIZE = 1024 * 1024; // 1 MB

    TempCompressedFile(File source) throws IOException {
        this.source = source;
        tempFile = File.createTempFile("exhibitor", ".tmp");
    }

    void compress() throws IOException {
        byte[] buffer = new byte[BUFFER_SIZE];

        InputStream in = null;
        OutputStream out = null;
        try {
            in = new FileInputStream(source);
            out = new GZIPOutputStream(new FileOutputStream(tempFile));

            for (;;) {
                int bytesRead = in.read(buffer);
                if (bytesRead < 0) {
                    break;
                }
                out.write(buffer, 0, bytesRead);
            }
        } finally {
            Closeables.closeQuietly(in);
            Closeables.closeQuietly(out);
        }
    }

    File getTempFile() {
        return tempFile;
    }
}