Examples of java.util.zip.Adler32.update()

java.util.zip.Adler32.update()
Updates checksum with specified byte. @param b an array of bytes

                byte []data = new byte[pageSize];
                if( recoveryFile.read(data, 0, pageSize) != pageSize ) {
                    // Invalid recovery record, Could not fully read the data". Probably due to a partial write to the recovery buffer
                    return nextTxId;
                }
                checksum.update(data, 0, pageSize);
                batch.put(offset, data);
            }
        } catch (Exception e) {
            // If an error occurred it was cause the redo buffer was not full written out correctly.. so don't redo it. 
            // as the pages should still be consistent.

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                if (length < 0)
                {
                    break;
                }


                checksum.update(buffer, 0, length);
            }


            is.close();


            // Reduces it down to just 32 bits which we express in hex.'

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        byte[] buffer = new byte[4 * 1024];
        InputStream input = dataStore.readAt(HeaderItem.CHECKSUM_DATA_START_OFFSET);
        int bytesRead = input.read(buffer);
        while (bytesRead >= 0) {
            a32.update(buffer, 0, bytesRead);
            bytesRead = input.read(buffer);
        }


        // write checksum, utilizing logic in DexWriter to write the integer value properly
        OutputStream output = dataStore.outputAt(HeaderItem.CHECKSUM_OFFSET);

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        message.writeTo(output);
        output.checkNoSpaceLeft();


        buffer.writerIndex(writerIndex + size);
        Adler32 checksum = new Adler32();
        checksum.update(buffer.array(), buffer.arrayOffset(), buffer.readableBytes());
        buffer.writeInt((int) checksum.getValue());
        return buffer;
    }
}

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            ChannelBuffer buffer = (ChannelBuffer) obj;
            if (buffer.readableBytes() > 8) {
                String version = buffer.toString(buffer.readerIndex(), 4, Charset.defaultCharset());
                if (version.equals("RPC0")) {
                    Adler32 adler32 = new Adler32();
                    adler32.update(buffer.array(),
                            buffer.arrayOffset() + buffer.readerIndex(),
                            buffer.readableBytes() - 4);
                    buffer.markReaderIndex();
                    buffer.readerIndex(buffer.writerIndex() - 4);
                    int checksum = buffer.readInt();

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        buffer.writeBytes(name.getBytes());
        buffer.writeZero(1);
        buffer.writeBytes(message.toByteArray());


        Adler32 checksum = new Adler32();
        checksum.update(buffer.array(), buffer.arrayOffset(), buffer.readableBytes());
        buffer.writeInt((int) checksum.getValue());


        return buffer;
    }
}

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        return obj;
    }


    private boolean checksum(ChannelBuffer buffer) {
        Adler32 adler32 = new Adler32();
        adler32.update(buffer.array(),
                buffer.arrayOffset() + buffer.readerIndex(),
                buffer.readableBytes() - 4);
        buffer.markReaderIndex();
        buffer.readerIndex(buffer.writerIndex() - 4);
        int checksum = buffer.readInt();

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  public long calculateChecksum() {
    Adler32 adler = new Adler32();
    for (Track track : tracks) {
      adler.update(track.getUUID());
      adler.update(0x01);
    }
    return adler.getValue();
  }

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  public long calculateChecksum() {
    Adler32 adler = new Adler32();
    for (Track track : tracks) {
      adler.update(track.getUUID());
      adler.update(0x01);
    }
    return adler.getValue();
  }


  @Override

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        header.putInt(blkId) ;
        header.flip() ;
        channel.write(header) ;
        
        Adler32 adler = new Adler32() ;
        adler.update(header.array()) ;


        if ( len > 0 )
        {
            // Make buffer include it's full length.
            // [TxDEV:TODO] This is the full buffer, junk and all.

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