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

    public BZip2Compressor(){
        super();
    }


    public void compressTo(InputStream in, OutputStream out) throws CompressException {
        BZip2CompressorOutputStream outputBZStream = null;
        try {
            outputBZStream = new BZip2CompressorOutputStream(out);
            NioUtils.copy(in, outputBZStream);
            outputBZStream.finish();
        } catch (Exception e) {
            throw new CompressException("bzip_compress_error", e);
        }
    }

View Full Code Here

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

View Full Code Here

            {
                return new GZIPOutputStream( ostream );
            }
            else if ( BZIP2.equals( value ) )
            {
                return new BZip2CompressorOutputStream( ostream );
            }
            return ostream;
        }

View Full Code Here

            {
                return new GZIPOutputStream( ostream );
            }
            else if ( BZIP2.equals( value ) )
            {
                return new BZip2CompressorOutputStream( ostream );
            }
            return ostream;
        }

View Full Code Here

            }
            else if ( BZIP2.equals( value ) )
            {
                ostream.write( 'B' );
                ostream.write( 'Z' );
                return new BZip2CompressorOutputStream( ostream );
            }
            return ostream;
        }

View Full Code Here


    @Override
    protected OutputStream doGetOutputStream(final boolean bAppend) throws Exception
    {
        final OutputStream os = getContainer().getContent().getOutputStream(false);
        return new BZip2CompressorOutputStream(os);
    }

View Full Code Here

      if (CompressionMethod.GZip.equals(compressionMethod)) {
        return new GZIPOutputStream(destinationStream);
      }
      
      if (CompressionMethod.BZip2.equals(compressionMethod)) {
        return new BZip2CompressorOutputStream(destinationStream);
      }
      
      throw new OsmosisRuntimeException("Compression method " + compressionMethod + " is not recognized.");
      
    } catch (IOException e) {

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

        channel.writeInbound(in);
    }


    private static void testDecompression(final EmbeddedChannel channel, final byte[] data) throws Exception {
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        BZip2CompressorOutputStream bZip2Os = new BZip2CompressorOutputStream(os, randomBlockSize());
        bZip2Os.write(data);
        bZip2Os.close();


        ByteBuf compressed = Unpooled.wrappedBuffer(os.toByteArray());
        channel.writeInbound(compressed);


        ByteBuf uncompressed = readUncompressed(channel);

View Full Code Here

    @Test
    public void testDecompressionOfBatchedFlowOfData() throws Exception {
        final byte[] data = BYTES_LARGE;


        ByteArrayOutputStream os = new ByteArrayOutputStream();
        BZip2CompressorOutputStream bZip2Os = new BZip2CompressorOutputStream(os, randomBlockSize());
        bZip2Os.write(data);
        bZip2Os.close();


        final byte[] compressedArray = os.toByteArray();
        int written = 0, length = rand.nextInt(100);
        while (written + length < compressedArray.length) {
            ByteBuf compressed = Unpooled.wrappedBuffer(compressedArray, written, length);

View Full Code Here

0 1 2 3

TOP

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

ca.pgon.helpers.CompresserHelper

com.alibaba.otter.node.etl.common.io.compress.impl.bzip2.BZip2Compressor

com.dotcms.tika.TikaUtils

com.dotmarketing.portlets.fileassets.business.FileAssetAPIImpl

com.linkedin.r2.filter.compression.Bzip2Compressor

freenet.support.compress.Bzip2Compressor

io.netty.handler.codec.compression.Bzip2DecoderTest

org.apache.ant.compress.util.BZip2StreamFactory

org.apache.avro.file.BZip2Codec

org.apache.commons.compress.archivers.sevenz.Coders$BZIP2Decoder

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.