Package java.util.zip

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

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            // Write all bytes
            channel.write(buffer) ;
            if (buffer.hasArray())
            {
                adler.update(buffer.array()) ;
            }
            else
            {
                byte[] data = new byte[bufferCapacity] ;
                buffer.position(0) ;
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            {
                byte[] data = new byte[bufferCapacity] ;
                buffer.position(0) ;
                buffer.limit(bufferCapacity) ;
                buffer.get(data) ;
                adler.update(data) ;
            }
           
            buffer.position(bufferPosition) ;
            buffer.limit(bufferLimit) ;
        }
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        int len     = header.getInt() ;
        int ref     = header.getInt() ;
        int blockId = header.getInt() ;
       
        Adler32 adler = new Adler32() ;
        adler.update(header.array()) ;

        ByteBuffer bb = ByteBuffer.allocate(len) ;
        lenRead = channel.read(bb) ;
        if ( lenRead != len)
            throw new TDBTransactionException("Failed to read the journal entry: wanted "+len+" bytes, got "+lenRead) ;
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        ByteBuffer bb = ByteBuffer.allocate(len) ;
        lenRead = channel.read(bb) ;
        if ( lenRead != len)
            throw new TDBTransactionException("Failed to read the journal entry: wanted "+len+" bytes, got "+lenRead) ;
        adler.update(bb.array()) ;
        bb.rewind() ;
        // checksum
        crcTrailer.clear() ;
        lenRead = channel.read(crcTrailer) ;
        if ( lenRead != SizeofCRC )
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            byte data[] = new byte[size];
            reader.readFully(offset+BATCH_CONTROL_RECORD_SIZE, data);

            Checksum checksum = new Adler32();
            checksum.update(data, 0, data.length);

            if( expectedChecksum!=checksum.getValue() ) {
                return -1;
            }
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            recoveryFile.seek(RECOVERY_FILE_HEADER_SIZE);
        }
        for (PageWrite w : batch) {
            if (enableRecoveryFile) {
                try {
                    checksum.update(w.getDiskBound(), 0, pageSize);
                } catch (Throwable t) {
                    throw IOExceptionSupport.create("Cannot create recovery file. Reason: " + t, t);
                }
                recoveryFile.writeLong(w.page.getPageId());
                recoveryFile.write(w.getDiskBound(), 0, pageSize);
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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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                buff.reset();
                buff.skip(5+Journal.BATCH_CONTROL_RECORD_MAGIC.length);
                buff.writeInt(sequence.getLength()-Journal.BATCH_CONTROL_RECORD_SIZE);
                if( journal.isChecksum() ) {
                    Checksum checksum = new Adler32();
                    checksum.update(sequence.getData(), sequence.getOffset()+Journal.BATCH_CONTROL_RECORD_SIZE, sequence.getLength()-Journal.BATCH_CONTROL_RECORD_SIZE);
                    buff.writeLong(checksum.getValue());
                }

                // Now do the 1 big write.
                file.seek(wb.offset);
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                buff.reset();
                buff.skip(5+Journal.BATCH_CONTROL_RECORD_MAGIC.length);
                buff.writeInt(sequence.getLength()-Journal.BATCH_CONTROL_RECORD_SIZE);
                if( journal.isChecksum() ) {
                  Checksum checksum = new Adler32();
                  checksum.update(sequence.getData(), sequence.getOffset()+Journal.BATCH_CONTROL_RECORD_SIZE, sequence.getLength()-Journal.BATCH_CONTROL_RECORD_SIZE);
                  buff.writeLong(checksum.getValue());
                }

                // Now do the 1 big write.
                file.seek(wb.offset);
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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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