Examples of java.util.zip.Checksum

java.util.zip.Checksum
An interface representing a data checksum. @version 1.17, 11/17/05 @author David Connelly

        CommitLog.instance.add(rm);
    }


    protected void testRecoveryWithBadSizeArgument(int size, int dataSize) throws Exception
    {
        Checksum checksum = new CRC32();
        checksum.update(size);
        testRecoveryWithBadSizeArgument(size, dataSize, checksum.getValue());
    }

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    {
        assert !closed;
        ReplayPosition repPos = getContext();
        markDirty(rowMutation, repPos);


        Checksum checksum = new PureJavaCrc32();
        byte[] serializedRow = rowMutation.getSerializedBuffer(MessagingService.version_);


        checksum.update(serializedRow.length);
        buffer.putInt(serializedRow.length);
        buffer.putLong(checksum.getValue());


        buffer.put(serializedRow);
        checksum.update(serializedRow, 0, serializedRow.length);
        buffer.putLong(checksum.getValue());


        if (buffer.remaining() >= 4)
        {
            // writes end of segment marker and rewinds back to position where it starts
            buffer.putInt(CommitLog.END_OF_SEGMENT_MARKER);

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        String text2 = "To be or not to be - Shakespeare";
        File file2 = new File(getTestDirectory(), "checksum-test2.txt");
        FileUtils.writeStringToFile(file2, text2, "US-ASCII");
        
        // compute the expected checksum
        Checksum expectedChecksum = new CRC32();
        expectedChecksum.update(text1.getBytes("US-ASCII"), 0, text1.length());
        expectedChecksum.update(text2.getBytes("US-ASCII"), 0, text2.length());
        long expectedValue = expectedChecksum.getValue();
        
        // compute the checksum of the file
        Checksum testChecksum = new CRC32();
        FileUtils.checksum(file1, testChecksum);
        FileUtils.checksum(file2, testChecksum);
        long resultValue = testChecksum.getValue();
        
        assertEquals(expectedValue, resultValue);
    }

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        String text = "Imagination is more important than knowledge - Einstein";
        File file = new File(getTestDirectory(), "checksum-test.txt");
        FileUtils.writeStringToFile(file, text, "US-ASCII");
        
        // compute the expected checksum
        Checksum expectedChecksum = new CRC32();
        expectedChecksum.update(text.getBytes("US-ASCII"), 0, text.length());
        long expectedValue = expectedChecksum.getValue();
        
        // compute the checksum of the file
        long resultValue = FileUtils.checksumCRC32(file);
        
        assertEquals(expectedValue, resultValue);

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        String text = "Imagination is more important than knowledge - Einstein";
        File file = new File(getTestDirectory(), "checksum-test.txt");
        FileUtils.writeStringToFile(file, text, "US-ASCII");
        
        // compute the expected checksum
        Checksum expectedChecksum = new CRC32();
        expectedChecksum.update(text.getBytes("US-ASCII"), 0, text.length());
        long expectedValue = expectedChecksum.getValue();
        
        // compute the checksum of the file
        Checksum testChecksum = new CRC32();
        Checksum resultChecksum = FileUtils.checksum(file, testChecksum);
        long resultValue = resultChecksum.getValue();
        
        assertSame(testChecksum, resultChecksum);
        assertEquals(expectedValue, resultValue);
    }

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        String text = "Imagination is more important than knowledge - Einstein";
        File file = new File(getTestDirectory(), "checksum-test.txt");
        FileUtils.writeStringToFile(file, text, "US-ASCII");
        
        // compute the expected checksum
        Checksum expectedChecksum = new CRC32();
        expectedChecksum.update(text.getBytes("US-ASCII"), 0, text.length());
        long expectedValue = expectedChecksum.getValue();
        
        // compute the checksum of the file
        long resultValue = FileUtils.checksumCRC32(file);
        
        assertEquals(expectedValue, resultValue);

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        String text = "Imagination is more important than knowledge - Einstein";
        File file = new File(getTestDirectory(), "checksum-test.txt");
        FileUtils.writeStringToFile(file, text, "US-ASCII");
        
        // compute the expected checksum
        Checksum expectedChecksum = new CRC32();
        expectedChecksum.update(text.getBytes("US-ASCII"), 0, text.length());
        long expectedValue = expectedChecksum.getValue();
        
        // compute the checksum of the file
        Checksum testChecksum = new CRC32();
        Checksum resultChecksum = FileUtils.checksum(file, testChecksum);
        long resultValue = resultChecksum.getValue();
        
        assertSame(testChecksum, resultChecksum);
        assertEquals(expectedValue, resultValue);
    }

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        String text2 = "To be or not to be - Shakespeare";
        File file2 = new File(getTestDirectory(), "checksum-test2.txt");
        FileUtils.writeStringToFile(file2, text2, "US-ASCII");
        
        // compute the expected checksum
        Checksum expectedChecksum = new CRC32();
        expectedChecksum.update(text1.getBytes("US-ASCII"), 0, text1.length());
        expectedChecksum.update(text2.getBytes("US-ASCII"), 0, text2.length());
        long expectedValue = expectedChecksum.getValue();
        
        // compute the checksum of the file
        Checksum testChecksum = new CRC32();
        FileUtils.checksum(file1, testChecksum);
        FileUtils.checksum(file2, testChecksum);
        long resultValue = testChecksum.getValue();
        
        assertEquals(expectedValue, resultValue);
    }

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                    // last CL entry didn't get completely written.  that's ok.
                    break;
                }


                ByteArrayInputStream bufIn = new ByteArrayInputStream(bytes);
                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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          System.out.println("EOF reached after " + count + " txns.");
        }


        return;
      }
      Checksum crc = new Adler32();
      crc.update(bytes, 0, bytes.length);
      if (crcValue != crc.getValue()) {
        throw new IOException("CRC doesn't match " + crcValue + " vs " + crc.getValue());
      }
      InputArchive iab = BinaryInputArchive.getArchive(new ByteArrayInputStream(bytes));
      TxnHeader hdr = new TxnHeader();
      Record txn = SerializeUtils.deserializeTxn(iab, hdr);
      if (bw != null) {

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