Examples of org.apache.kahadb.util.DataByteArrayInputStream

org.apache.kahadb.util.DataByteArrayInputStream
Optimized ByteArrayInputStream that can be used more than once

     * @return
     * @throws IOException
     */
    public JournalCommand<?> load(Location location) throws IOException {
        ByteSequence data = journal.read(location);
        DataByteArrayInputStream is = new DataByteArrayInputStream(data);
        byte readByte = is.readByte();
        KahaEntryType type = KahaEntryType.valueOf(readByte);
        if( type == null ) {
            throw new IOException("Could not load journal record. Invalid location: "+location);
        }
        JournalCommand<?> message = (JournalCommand<?>)type.createMessage();

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        if( LOG_SLOW_ACCESS_TIME>0 && end-start > LOG_SLOW_ACCESS_TIME) {
            if (LOG.isInfoEnabled()) {
                LOG.info("Slow KahaDB access: Journal read took: "+(end-start)+" ms");
            }
        }
        DataByteArrayInputStream is = new DataByteArrayInputStream(data);
        byte readByte = is.readByte();
        KahaEntryType type = KahaEntryType.valueOf(readByte);
        if( type == null ) {
            throw new IOException("Could not load journal record. Invalid location: "+location);
        }
        JournalCommand<?> message = (JournalCommand<?>)type.createMessage();

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        recoveredPendingCommit.addAll(inflightTransactions.keySet());
        LOG.info("pending local transactions: " + recoveredPendingCommit);
    }


    public JournalCommand<?> load(Location location) throws IOException {
        DataByteArrayInputStream is = new DataByteArrayInputStream(journal.read(location));
        byte readByte = is.readByte();
        KahaEntryType type = KahaEntryType.valueOf(readByte);
        if (type == null) {
            throw new IOException("Could not load journal record. Invalid location: " + location);
        }
        JournalCommand<?> message = (JournalCommand<?>) type.createMessage();

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    }




    public int checkBatchRecord(DataFileAccessor reader, int offset) throws IOException {
        byte controlRecord[] = new byte[BATCH_CONTROL_RECORD_SIZE];
        DataByteArrayInputStream controlIs = new DataByteArrayInputStream(controlRecord);


        reader.readFully(offset, controlRecord);


        // Assert that it's  a batch record.
        for( int i=0; i < BATCH_CONTROL_RECORD_HEADER.length; i++ ) {
            if( controlIs.readByte() != BATCH_CONTROL_RECORD_HEADER[i] ) {
                return -1;
            }
        }


        int size = controlIs.readInt();
        if( size > MAX_BATCH_SIZE ) {
            return -1;
        }


        if( isChecksum() ) {


            long expectedChecksum = controlIs.readLong();
            if( expectedChecksum == 0 ) {
                // Checksuming was not enabled when the record was stored.
                // we can't validate the record :(
                return size;
            }

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     * @return
     * @throws IOException
     */
    public JournalCommand<?> load(Location location) throws IOException {
        ByteSequence data = journal.read(location);
        DataByteArrayInputStream is = new DataByteArrayInputStream(data);
        byte readByte = is.readByte();
        KahaEntryType type = KahaEntryType.valueOf(readByte);
        if( type == null ) {
            throw new IOException("Could not load journal record. Invalid location: "+location);
        }
        JournalCommand<?> message = (JournalCommand<?>)type.createMessage();

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    }




    public int checkBatchRecord(DataFileAccessor reader, int offset) throws IOException {
        byte controlRecord[] = new byte[BATCH_CONTROL_RECORD_SIZE];
        DataByteArrayInputStream controlIs = new DataByteArrayInputStream(controlRecord);


        reader.readFully(offset, controlRecord);


        // Assert that it's  a batch record.
        for( int i=0; i < BATCH_CONTROL_RECORD_HEADER.length; i++ ) {
            if( controlIs.readByte() != BATCH_CONTROL_RECORD_HEADER[i] ) {
                return -1;
            }
        }


        int size = controlIs.readInt();
        if( size > MAX_BATCH_SIZE ) {
            return -1;
        }


        if( isChecksum() ) {


            long expectedChecksum = controlIs.readLong();
            if( expectedChecksum == 0 ) {
                // Checksuming was not enabled when the record was stored.
                // we can't validate the record :(
                return size;
            }

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     * @return
     * @throws IOException
     */
    public JournalCommand<?> load(Location location) throws IOException {
        ByteSequence data = journal.read(location);
        DataByteArrayInputStream is = new DataByteArrayInputStream(data);
        byte readByte = is.readByte();
        KahaEntryType type = KahaEntryType.valueOf(readByte);
        if( type == null ) {
            throw new IOException("Could not load journal record. Invalid location: "+location);
        }
        JournalCommand<?> message = (JournalCommand<?>)type.createMessage();

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    }




    public int checkBatchRecord(DataFileAccessor reader, int offset) throws IOException {
        byte controlRecord[] = new byte[BATCH_CONTROL_RECORD_SIZE];
        DataByteArrayInputStream controlIs = new DataByteArrayInputStream(controlRecord);


        reader.readFully(offset, controlRecord);


        // Assert that it's  a batch record.
        for( int i=0; i < BATCH_CONTROL_RECORD_HEADER.length; i++ ) {
            if( controlIs.readByte() != BATCH_CONTROL_RECORD_HEADER[i] ) {
                return -1;
            }
        }


        int size = controlIs.readInt();
        if( size > MAX_BATCH_SIZE ) {
            return -1;
        }


        if( isChecksum() ) {


            long expectedChecksum = controlIs.readLong();
            if( expectedChecksum == 0 ) {
                // Checksuming was not enabled when the record was stored.
                // we can't validate the record :(
                return size;
            }

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     * @return
     * @throws IOException
     */
    public JournalCommand load(Location location) throws IOException {
        ByteSequence data = journal.read(location);
        DataByteArrayInputStream is = new DataByteArrayInputStream(data);
        byte readByte = is.readByte();
        KahaEntryType type = KahaEntryType.valueOf(readByte);
        if( type == null ) {
            throw new IOException("Could not load journal record. Invalid location: "+location);
        }
        JournalCommand message = (JournalCommand)type.createMessage();

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            DataInputStream dataIn = new DataInputStream(is);
            page.set(marshaller.readPayload(dataIn));
            is.close();
        } else {
            // Page header read.
            DataByteArrayInputStream in = new DataByteArrayInputStream(new byte[Page.PAGE_HEADER_SIZE]);
            pageFile.readPage(pageId, in.getRawData());
            page.read(in);
            page.set(null);
        }


        // Cache it.

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