Examples of org.apache.cassandra.thrift.SlicePredicate

org.apache.cassandra.thrift.SlicePredicate
kipedia.org/wiki/Predicate_(mathematical_logic)), which is described as "a property that the elements of a set have in common." SlicePredicate's in Cassandra are described with either a list of column_names or a SliceRange. If column_names is specified, slice_range is ignored. @param column_name. A list of column names to retrieve. This can be used similar to Memcached's "multi-get" featureto fetch N known column names. For instance, if you know you wish to fetch columns 'Joe', 'Jack', and 'Jim' you can pass those column names as a list to fetch all three at once. @param slice_range. A SliceRange describing how to range, order, and/or limit the slice.

    }


    @Override
    public void run(final ThriftClient client) throws IOException
    {
        final SlicePredicate predicate = new SlicePredicate()
                .setSlice_range(
                        new SliceRange(
                                ByteBufferUtil.EMPTY_BYTE_BUFFER,
                                ByteBufferUtil.EMPTY_BYTE_BUFFER,
                                false,

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        // start/finish
        sliceRange.setStart(new byte[] {}).setFinish(new byte[] {});
        // reversed/count
        sliceRange.setReversed(false).setCount(state.settings.columns.maxColumnsPerKey);
        // initialize SlicePredicate with existing SliceRange
        final SlicePredicate predicate = new SlicePredicate().setSlice_range(sliceRange);


        final ByteBuffer key = getKey();
        for (final ColumnParent parent : state.columnParents)
        {

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        super(state, index);
    }


    public void run(final ThriftClient client) throws IOException
    {
        final SlicePredicate predicate = new SlicePredicate();
        if (state.settings.columns.names == null)
            predicate.setSlice_range(new SliceRange()
                    .setStart(new byte[] {})
                    .setFinish(new byte[] {})
                    .setReversed(false)
                    .setCount(state.settings.columns.maxColumnsPerKey)
            );
        else // see CASSANDRA-3064 about why this is useful
            predicate.setColumn_names(state.settings.columns.names);


        final ByteBuffer key = getKey();
        final List<ByteBuffer> expect = state.rowGen.isDeterministic() ? generateColumnValues(key) : null;
        for (final ColumnParent parent : state.columnParents)
        {

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    }


    public void run(final ThriftClient client) throws IOException
    {


        final SlicePredicate predicate = new SlicePredicate().setSlice_range(
                new SliceRange(
                        ByteBufferUtil.EMPTY_BYTE_BUFFER,
                        ByteBufferUtil.EMPTY_BYTE_BUFFER,
                        false,
                        state.settings.columns.maxColumnsPerKey

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    private static SlicePredicate predicateFromString(String st)
    {
        assert st != null;
        TDeserializer deserializer = new TDeserializer(new TBinaryProtocol.Factory());
        SlicePredicate predicate = new SlicePredicate();
        try
        {
            deserializer.deserialize(predicate, FBUtilities.hexToBytes(st));
        }
        catch (TException e)

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            ConfigHelper.setRpcPort(job.getConfiguration(), "9160");
            ConfigHelper.setInitialAddress(job.getConfiguration(), "localhost");
            ConfigHelper.setPartitioner(job.getConfiguration(), "org.apache.cassandra.dht.RandomPartitioner");
            ConfigHelper.setInputColumnFamily(job.getConfiguration(), KEYSPACE, COLUMN_FAMILY);
            SlicePredicate predicate = new SlicePredicate().setColumn_names(Arrays.asList(ByteBufferUtil.bytes(columnName)));
            ConfigHelper.setInputSlicePredicate(job.getConfiguration(), predicate);


            job.waitForCompletion(true);
        }
        return 0;

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    private static SlicePredicate predicateFromString(String st)
    {
        assert st != null;
        TDeserializer deserializer = new TDeserializer(new TBinaryProtocol.Factory());
        SlicePredicate predicate = new SlicePredicate();
        try
        {
            deserializer.deserialize(predicate, FBUtilities.hexToBytes(st));
        }
        catch (TException e)

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        ByteBuffer super_column = null;
        if (scLength > 0)
            super_column = ByteBuffer.wrap(readBuf(scLength, dis));


        TDeserializer dser = new TDeserializer(new TBinaryProtocol.Factory());
        SlicePredicate pred = new SlicePredicate();
        FBUtilities.deserialize(dser, pred, dis);


        AbstractBounds range = AbstractBounds.serializer().deserialize(dis);
        int max_keys = dis.readInt();
        return new RangeSliceCommand(keyspace, column_family, super_column, pred, range, max_keys);

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            String columnFamily = in.readUTF();


            TDeserializer dser = new TDeserializer(new TBinaryProtocol.Factory());
            IndexClause indexClause = new IndexClause();
            FBUtilities.deserialize(dser, indexClause, in);
            SlicePredicate predicate = new SlicePredicate();
            FBUtilities.deserialize(dser, predicate, in);
            AbstractBounds range = AbstractBounds.serializer().deserialize(in);


            return new IndexScanCommand(keyspace, columnFamily, indexClause, predicate, range);
        }

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        ByteBuffer super_column = null;
        if (scLength > 0)
            super_column = ByteBuffer.wrap(readBuf(scLength, dis));


        TDeserializer dser = new TDeserializer(new TBinaryProtocol.Factory());
        SlicePredicate pred = new SlicePredicate();
        FBUtilities.deserialize(dser, pred, dis);


        AbstractBounds range = AbstractBounds.serializer().deserialize(dis);
        int max_keys = dis.readInt();
        return new RangeSliceCommand(keyspace, column_family, super_column, pred, range, max_keys);

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