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

java.util.zip.Checksum.update()
Updates the current checksum with the specified byte. @param b the byte to update the checksum with

    }


    private static long crc32( byte[] payload )
    {
        final Checksum checksum = new CRC32();
        checksum.update( payload, 0, payload.length );
        return checksum.getValue();
    }


    @Test
    public void aFewEntriesWithCheck()

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                    // last CL entry didn't get completely written.  that's ok.
                    break;
                }
                bufIn.reset(bytes, bytes.length);
                Checksum checksum = new CRC32();
                checksum.update(bytes, 0, bytes.length);
                if (claimedCRC32 != checksum.getValue())
                {
                    // this part of the log must not have been fsynced.  probably the rest is bad too,
                    // but just in case there is no harm in trying them.
                    continue;

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                if (serializedRow instanceof DataOutputBuffer)
                {
                    DataOutputBuffer buffer = (DataOutputBuffer) serializedRow;
                    logWriter_.writeLong(buffer.getLength());
                    logWriter_.write(buffer.getData(), 0, buffer.getLength());
                    checkum.update(buffer.getData(), 0, buffer.getLength());
                }
                else
                {
                    assert serializedRow instanceof byte[];
                    byte[] bytes = (byte[]) serializedRow;

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                {
                    assert serializedRow instanceof byte[];
                    byte[] bytes = (byte[]) serializedRow;
                    logWriter_.writeLong(bytes.length);
                    logWriter_.write(bytes);
                    checkum.update(bytes, 0, bytes.length);
                }
                logWriter_.writeLong(checkum.getValue());
                maybeRollLog();
                return cLogCtx;
            }

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            if (buf == null || buf.length == 0) {
                throw new IOException("Faulty serialization for header " +
                        "and txn");
            }
            Checksum crc = makeChecksumAlgorithm();
            crc.update(buf, 0, buf.length);
            oa.writeLong(crc.getValue(), "txnEntryCRC");
            Util.writeTxnBytes(oa, buf);
            
            return true;
        }

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                if (bytes == null || bytes.length==0)
                   throw new EOFException("Failed to read");
                // EOF or corrupted record
                // validate CRC
                Checksum crc = makeChecksumAlgorithm();
                crc.update(bytes, 0, bytes.length);
                if (crcValue != crc.getValue())
                    throw new IOException(CRC_ERROR);
                if (bytes == null || bytes.length == 0)
                    return false;
                InputArchive iab = BinaryInputArchive

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                // factor in this case since we know
                // our write batches are going to much larger.
                Checksum checksum = new Adler32();
                for (PageWrite w : batch) {
                    try {
                        checksum.update(w.diskBound, 0, pageSize);
                    } catch (Throwable t) {
                        throw IOExceptionSupport.create(
                                "Cannot create recovery file. Reason: " + t, t);
                    }
                }

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                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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    Checksum sum = new CRC32();
    sum.reset();
    try {
      int bytesRead = in.read(buf);
      while (bytesRead >= 0) {
        sum.update(buf, 0, bytesRead);
        out.write(buf, 0, bytesRead);
        if ((ps != null) && ps.checkError()) {
          throw new IOException("Unable to write to output stream.");
        }
        bytesRead = in.read(buf);

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      buf.writeLong(op.txid);
      op.writeFields(buf);
      int end = buf.getLength();
      Checksum checksum = FSEditLog.getChecksumForWrite();
      checksum.reset();
      checksum.update(buf.getData(), start, end-start);
      int sum = (int)checksum.getValue();
      buf.writeInt(sum);
    }
  }

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