Examples of com.dotcms.repackage.org.apache.commons.compress.compressors.bzip2.BZip2CompressorOutputStream

Package com.dotcms.repackage.org.apache.commons.compress.compressors.bzip2

Examples of com.dotcms.repackage.org.apache.commons.compress.compressors.bzip2.BZip2CompressorOutputStream

org.apache.commons.compress.compressors.bzip2.BZip2CompressorOutputStream

An output stream that compresses into the BZip2 format into another stream.

The compression requires large amounts of memory. Thus you should call the {@link #close() close()} method as soon as possible, to forceBZip2CompressorOutputStream to release the allocated memory.

You can shrink the amount of allocated memory and maybe raise the compression speed by choosing a lower blocksize, which in turn may cause a lower compression ratio. You can avoid unnecessary memory allocation by avoiding using a blocksize which is bigger than the size of the input.

You can compute the memory usage for compressing by the following formula:

 <code>400k + (9 * blocksize)</code>.

To get the memory required for decompression by {@link BZip2CompressorInputStream} use

 <code>65k + (5 * blocksize)</code>.

Memory usage by blocksize
Blocksize	Compression memory usage	Decompression memory usage
100k	1300k	565k
200k	2200k	1065k
300k	3100k	1565k
400k	4000k	2065k
500k	4900k	2565k
600k	5800k	3065k
700k	6700k	3565k
800k	7600k	4065k
900k	8500k	4565k

For decompression BZip2CompressorInputStream allocates less memory if the bzipped input is smaller than one block.

Instances of this class are not threadsafe.

TODO: Update to BZip2 1.0.1

@NotThreadSafe


  private final ArchiveCommand.Format<ArchiveOutputStream> tarFormat = new TarFormat();


  public ArchiveOutputStream createArchiveOutputStream(OutputStream s)
      throws IOException {
    BZip2CompressorOutputStream out = new BZip2CompressorOutputStream(s);
    return tarFormat.createArchiveOutputStream(out);
  }

View Full Code Here

     */
    public static byte[] compressBZip2(byte[] bytes) {
        try {
            InputStream bytesIS = new ByteArrayInputStream(bytes);
            ByteArrayOutputStream bytesCompressedOS = new ByteArrayOutputStream();
            BZip2CompressorOutputStream bzip2CompressorOS = new BZip2CompressorOutputStream(bytesCompressedOS);


            ByteStreams.copy(bytesIS, bzip2CompressorOS);
            bzip2CompressorOS.close();


            return bytesCompressedOS.toByteArray();
        } catch (IOException e) {
            logger.log(Level.SEVERE, "Error while compressing", e);
            return null;

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            out = new ZipOutputStream(out);
            ((ZipOutputStream)out).putNextEntry(new ZipEntry("entity-ids.txt"));
        } else if("gz".equalsIgnoreCase(extension)) {
            out = new GZIPOutputStream(out);
        } else if("bz2".equalsIgnoreCase(extension)) {
            out = new BZip2CompressorOutputStream(out);
        }
        return out;
    }

View Full Code Here

     * @throws IOException
     */
    private static void _compressBZip2(InputStream source, OutputStream target) throws IOException {
        
        InputStream is = IOUtil.toBufferedInputStream(source);
        OutputStream os = new BZip2CompressorOutputStream(IOUtil.toBufferedOutputStream(target));
        IOUtil.copy(is,os,true,true);
    }

View Full Code Here

            if (GZIP.equalsIgnoreCase(name)) {
                return new GzipCompressorOutputStream(out);
            }


            if (BZIP2.equalsIgnoreCase(name)) {
                return new BZip2CompressorOutputStream(out);
            }


            if (XZ.equalsIgnoreCase(name)) {
                return new XZCompressorOutputStream(out);
            }

View Full Code Here

        }
        @Override
        OutputStream encode(final OutputStream out, final Object options)
                throws IOException {
            int blockSize = numberOptionOrDefault(options, BZip2CompressorOutputStream.MAX_BLOCKSIZE);
            return new BZip2CompressorOutputStream(out, blockSize);
        }

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                os = new GZIPOutputStream(os);
                name = FilenameUtils.removeExtension(name);
                log.debug("   - from GZIP Archive");
            } else if ("bz2".equalsIgnoreCase(FilenameUtils.getExtension(name))) {
                is = new BZip2CompressorInputStream(is);
                os = new BZip2CompressorOutputStream(os);
                name = FilenameUtils.removeExtension(name);
                log.debug("   - from BZip2 Archive");
            }// TODO: No Zip File support
            //else no complression
            BlockingQueue<String> queue = new ArrayBlockingQueue<String>(1000);

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        {
            BufferedOutputStream bos =
                new BufferedOutputStream( new FileOutputStream( getDestFile() ) );
            bos.write( 'B' );
            bos.write( 'Z' );
            zOut = new BZip2CompressorOutputStream( bos );
            compress( getSource(), zOut );
        }
        catch ( IOException ioe )
        {
            String msg = "Problem creating bzip2 " + ioe.getMessage();

View Full Code Here


  @Override
  public byte[] deflate(InputStream data) throws CompressionException
  {
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    BZip2CompressorOutputStream compressor = null;


    try
    {
      out = new ByteArrayOutputStream();
      compressor = new BZip2CompressorOutputStream(out);


      IOUtils.copy(data, compressor);
      compressor.finish();
    }
    catch (IOException e)
    {
      throw new CompressionException(CompressionConstants.DECODING_ERROR + getContentEncodingName(), e);
    }

View Full Code Here

            if (GZIP.equalsIgnoreCase(name)) {
                return new GzipCompressorOutputStream(out);
            }
            
            if (BZIP2.equalsIgnoreCase(name)) {
                return new BZip2CompressorOutputStream(out);
            }
        
        } catch (IOException e) {
            throw new CompressorException(
                    "Could not create CompressorOutputStream", e);

View Full Code Here

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