Examples of DecoratedKey

org.apache.cassandra.db.DecoratedKey
Represents a decorated key, handy for certain operations where just working with strings gets slow. We do a lot of sorting of DecoratedKeys, so for speed, we assume that tokens correspond one-to-one with keys. This is not quite correct in the case of RandomPartitioner (which uses MD5 to hash keys to tokens); if this matters, you can subclass RP to use a stronger hash, or use a non-lossy tokenization scheme (as in the OrderPreservingPartitioner classes).

Examples of org.apache.cassandra.db.DecoratedKey

        return decorateKey(key);
    }


    public DecoratedKey decorateKey(ByteBuffer key)
    {
        return new DecoratedKey(getToken(key), key);
    }

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Examples of org.apache.cassandra.db.DecoratedKey


    private static final byte DELIMITER_BYTE = ":".getBytes()[0];


    public DecoratedKey decorateKey(ByteBuffer key)
    {
        return new DecoratedKey(getToken(key), key);
    }

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Examples of org.apache.cassandra.db.DecoratedKey

        {
            throw new RuntimeException(e);
        }
        ByteBuffer key = fromdisk.duplicate();
        key.position(splitPoint + 1);
        return new DecoratedKey(new BigIntegerToken(token), key);
    }

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Examples of org.apache.cassandra.db.DecoratedKey

        throw new UnsupportedOperationException();
    }


    public DecoratedKey decorateKey(ByteBuffer key)
    {
        return new DecoratedKey(getToken(key), key);
    }

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Examples of org.apache.cassandra.db.DecoratedKey

                    int numkeys = keys.size();
                    Random random = new Random();
                    // sample the column family using random keys from the index
                    while (true)
                    {
                        DecoratedKey dk = keys.get(random.nextInt(numkeys));
                        if (!tree.split(dk.token))
                            break;
                    }
                }
            }

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Examples of org.apache.cassandra.db.DecoratedKey

    }


    private SSTableReader streamIn(DataInput input, PendingFile localFile, PendingFile remoteFile) throws IOException
    {
        ColumnFamilyStore cfs = Table.open(localFile.desc.ksname).getColumnFamilyStore(localFile.desc.cfname);
        DecoratedKey key;
        SSTableWriter writer = new SSTableWriter(localFile.getFilename(), remoteFile.estimatedKeys);
        CompactionController controller = null;


        try
        {

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Examples of org.apache.cassandra.db.DecoratedKey

        generations = new List[n];
        lastCompactedKeys = new DecoratedKey[n];
        for (int i = 0; i < generations.length; i++)
        {
            generations[i] = new ArrayList<SSTableReader>();
            lastCompactedKeys[i] = new DecoratedKey(cfs.partitioner.getMinimumToken(), null);
        }
    }

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Examples of org.apache.cassandra.db.DecoratedKey

    public SSTableNamesIterator(SSTableReader ssTable, String key, SortedSet<byte[]> columnNames) throws IOException
    {
        assert columnNames != null;
        this.columns = columnNames;


        DecoratedKey decoratedKey = ssTable.getPartitioner().decorateKey(key);
        long position = ssTable.getPosition(decoratedKey);
        if (position < 0)
            return;


        BufferedRandomAccessFile file = new BufferedRandomAccessFile(ssTable.getFilename(), "r", DatabaseDescriptor.getIndexedReadBufferSizeInKB() * 1024);
        try
        {
            file.seek(position);


            DecoratedKey keyInDisk = ssTable.getPartitioner().convertFromDiskFormat(file.readUTF());
            assert keyInDisk.equals(decoratedKey) : keyInDisk;
            file.readInt(); // data size


            /* Read the bloom filter summarizing the columns */
            BloomFilter bf = IndexHelper.defreezeBloomFilter(file);
            List<byte[]> filteredColumnNames = new ArrayList<byte[]>(columnNames.size());

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Examples of org.apache.cassandra.db.DecoratedKey

    throws IOException
    {
        this.reversed = reversed;


        /* Morph key into actual key based on the partition type. */
        DecoratedKey decoratedKey = ssTable.getPartitioner().decorateKey(key);
        long position = ssTable.getPosition(decoratedKey);
        this.comparator = ssTable.getColumnComparator();
        this.startColumn = startColumn;
        this.finishColumn = finishColumn;
        if (position >= 0)

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Examples of org.apache.cassandra.db.DecoratedKey

        public ColumnGroupReader(SSTableReader ssTable, DecoratedKey key, long position) throws IOException
        {
            this.file = new BufferedRandomAccessFile(ssTable.getFilename(), "r", DatabaseDescriptor.getSlicedReadBufferSizeInKB() * 1024);


            file.seek(position);
            DecoratedKey keyInDisk = ssTable.getPartitioner().convertFromDiskFormat(file.readUTF());
            assert keyInDisk.equals(key);


            file.readInt(); // row size
            IndexHelper.skipBloomFilter(file);
            indexes = IndexHelper.deserializeIndex(file);

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