Package org.apache.cassandra.io.util

Examples of org.apache.cassandra.io.util.DataOutputBuffer

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    public void updateDigest(MessageDigest digest)
    {
        assert name != null;
        digest.update(name.duplicate());
        DataOutputBuffer buffer = new DataOutputBuffer();
        try
        {
            buffer.writeLong(getMarkedForDeleteAt());
        }
        catch (IOException e)
        {
            throw new RuntimeException(e);
        }
        digest.update(buffer.getData(), 0, buffer.getLength());
        for (IColumn column : getSubColumns())
        {
            column.updateDigest(digest);
        }
    }
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    }

    public static <T> byte[] serialize(T object, IVersionedSerializer<T> serializer, int version) throws IOException
    {
        int size = (int) serializer.serializedSize(object, version);
        DataOutputBuffer buffer = new DataOutputBuffer(size);
        serializer.serialize(object, buffer, version);
        assert buffer.getLength() == size && buffer.getData().length == size
               : String.format("Final buffer length %s to accomodate data size of %s (predicted %s) for %s",
                               buffer.getData().length, buffer.getLength(), size, object);
        return buffer.getData();
    }
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         * | No. of Pending files | Pending Files ... |
         */
        byte[] bytes;
        try
        {
            DataOutputBuffer buffer = new DataOutputBuffer();
            StreamHeader.serializer().serialize(streamHeader, buffer, version);
            bytes = buffer.getData();
        }
        catch (IOException e)
        {
            throw new RuntimeException(e);
        }
        assert bytes.length > 0;

        ByteBuffer buffer = ByteBuffer.allocate(4 + 4 + 4 + bytes.length);
        buffer.putInt(PROTOCOL_MAGIC);
        buffer.putInt(header);
        buffer.putInt(bytes.length);
        buffer.put(bytes);
        buffer.flip();
        return buffer;
    }
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            else
                emptyColumnFamily.delete(cf);
        }

        // initialize row header so isEmpty can be called
        headerBuffer = new DataOutputBuffer();
        ColumnIndexer.serialize(this, headerBuffer);
        // reach into the reducer used during iteration to get column count, size, max column timestamp
        // (however, if there are zero columns, iterator() will not be called by ColumnIndexer and reducer will be null)
        columnCount = reducer == null ? 0 : reducer.size;
        columnSerializedSize = reducer == null ? 0 : reducer.serializedSize;
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    public long write(DataOutput out) throws IOException
    {
        assert !closed;

        DataOutputBuffer clockOut = new DataOutputBuffer();
        ColumnFamily.serializer().serializeCFInfo(emptyColumnFamily, clockOut);

        long dataSize = headerBuffer.getLength() + clockOut.getLength() + columnSerializedSize;
        if (logger.isDebugEnabled())
            logger.debug(String.format("header / clock / column sizes are %s / %s / %s",
                         headerBuffer.getLength(), clockOut.getLength(), columnSerializedSize));
        assert dataSize > 0;
        out.writeLong(dataSize);
        out.write(headerBuffer.getData(), 0, headerBuffer.getLength());
        out.write(clockOut.getData(), 0, clockOut.getLength());
        out.writeInt(columnCount);

        Iterator<IColumn> iter = iterator();
        while (iter.hasNext())
        {
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    {
        assert !closed;

        // no special-case for rows.size == 1, we're actually skipping some bytes here so just
        // blindly updating everything wouldn't be correct
        DataOutputBuffer out = new DataOutputBuffer();

        try
        {
            ColumnFamily.serializer().serializeCFInfo(emptyColumnFamily, out);
            out.writeInt(columnCount);
            digest.update(out.getData(), 0, out.getLength());
        }
        catch (IOException e)
        {
            throw new IOError(e);
        }
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    }

    public long write(DataOutput out) throws IOException
    {
        assert compactedCf != null;
        DataOutputBuffer buffer = new DataOutputBuffer();
        DataOutputBuffer headerBuffer = new DataOutputBuffer();
        ColumnIndexer.serialize(compactedCf, headerBuffer);
        ColumnFamily.serializer().serializeForSSTable(compactedCf, buffer);
        int dataSize = headerBuffer.getLength() + buffer.getLength();
        out.writeLong(dataSize);
        out.write(headerBuffer.getData(), 0, headerBuffer.getLength());
        out.write(buffer.getData(), 0, buffer.getLength());
        return dataSize;
    }
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    }

    public void update(MessageDigest digest)
    {
        assert compactedCf != null;
        DataOutputBuffer buffer = new DataOutputBuffer();
        try
        {
            ColumnFamily.serializer().serializeCFInfo(compactedCf, buffer);
            buffer.writeInt(compactedCf.getColumnCount());
            digest.update(buffer.getData(), 0, buffer.getLength());
        }
        catch (IOException e)
        {
            throw new RuntimeException(e);
        }
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    }

    public static <T> byte[] serialize(T object, IVersionedSerializer<T> serializer, int version) throws IOException
    {
        int size = (int) serializer.serializedSize(object, version);
        DataOutputBuffer buffer = new DataOutputBuffer(size);
        serializer.serialize(object, buffer, version);
        assert buffer.getLength() == size && buffer.getData().length == size
               : String.format("Final buffer length %s to accomodate data size of %s (predicted %s) for %s",
                               buffer.getData().length, buffer.getLength(), size, object);
        return buffer.getData();
    }
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        try
        {
            switch (compression)
            {
                case GZIP:
                    DataOutputBuffer decompressed = new DataOutputBuffer();
                    byte[] outBuffer = new byte[1024], inBuffer = new byte[1024];

                    Inflater decompressor = new Inflater();

                    int lenRead = 0;
                    while (true)
                    {
                        if (decompressor.needsInput())
                            lenRead = query.remaining() < 1024 ? query.remaining() : 1024;
                            query.get(inBuffer, 0, lenRead);
                            decompressor.setInput(inBuffer, 0, lenRead);

                        int lenWrite = 0;
                        while ((lenWrite = decompressor.inflate(outBuffer)) !=0)
                            decompressed.write(outBuffer, 0, lenWrite);

                        if (decompressor.finished())
                            break;
                    }

                    decompressor.end();

                    queryString = new String(decompressed.getData(), 0, decompressed.size(), "UTF-8");
                    break;
                case NONE:
                    try
                    {
                        queryString = ByteBufferUtil.string(query);
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Related Classes of org.apache.cassandra.io.util.DataOutputBuffer

  • org.apache.cassandra.AbstractSerializationsTester
  • org.apache.cassandra.bulkloader.CassandraBulkLoader
  • org.apache.cassandra.db.BatchlogManager
  • org.apache.cassandra.db.Cell
  • org.apache.cassandra.db.Column
  • org.apache.cassandra.db.ColumnFamily
  • org.apache.cassandra.db.ColumnFamilyTest
  • org.apache.cassandra.db.ColumnIndexer
  • org.apache.cassandra.db.commitlog.CommitLogSegment
  • org.apache.cassandra.db.compaction.LazilyCompactedRow
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