Examples of org.apache.cassandra.thrift.SliceRange

org.apache.cassandra.thrift.SliceRange
A slice range is a structure that stores basic range, ordering and limit information for a query that will return multiple columns. It could be thought of as Cassandra's version of LIMIT and ORDER BY @param start. The column name to start the slice with. This attribute is not required, though there is no default value,and can be safely set to '', i.e., an empty byte array, to start with the first column name. Otherwise, it must a valid value under the rules of the Comparator defined for the given ColumnFamily. @param finish. The column name to stop the slice at. This attribute is not required, though there is no default value,and can be safely set to an empty byte array to not stop until 'count' results are seen. Otherwise, it must also be a valid value to the ColumnFamily Comparator. @param reversed. Whether the results should be ordered in reversed order. Similar to ORDER BY blah DESC in SQL. @param count. How many columns to return. Similar to LIMIT in SQL. May be arbitrarily large, but Thrift willmaterialize the whole result into memory before returning it to the client, so be aware that you may be better served by iterating through slices by passing the last value of one call in as the 'start' of the next instead of increasing 'count' arbitrarily large.

      Cassandra.Client cassandraClient = null;
      try {
         cassandraClient = dataSource.getConnection();
         Set<InternalCacheEntry> s = new HashSet<InternalCacheEntry>();
         SlicePredicate slicePredicate = new SlicePredicate();
         slicePredicate.setSlice_range(new SliceRange(ByteBuffer.wrap(entryColumnPath.getColumn()),
                  ByteBufferUtil.EMPTY_BYTE_BUFFER, false, 1));
         String startKey = "";


         // Get the keys in SLICE_SIZE blocks
         int sliceSize = Math.min(SLICE_SIZE, numEntries);

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      Cassandra.Client cassandraClient = null;
      try {
         cassandraClient = dataSource.getConnection();
         Set<Object> s = new HashSet<Object>();
         SlicePredicate slicePredicate = new SlicePredicate();
         slicePredicate.setSlice_range(new SliceRange(ByteBuffer.wrap(entryColumnPath.getColumn()),
                  ByteBufferUtil.EMPTY_BYTE_BUFFER, false, 1));
         String startKey = "";
         boolean complete = false;
         // Get the keys in SLICE_SIZE blocks
         while (!complete) {

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   public void clear() throws CacheLoaderException {
      Cassandra.Client cassandraClient = null;
      try {
         cassandraClient = dataSource.getConnection();
         SlicePredicate slicePredicate = new SlicePredicate();
         slicePredicate.setSlice_range(new SliceRange(ByteBuffer.wrap(entryColumnPath.getColumn()),
                  ByteBufferUtil.EMPTY_BYTE_BUFFER, false, 1));
         String startKey = "";
         boolean complete = false;
         // Get the keys in SLICE_SIZE blocks
         while (!complete) {

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      try {
         cassandraClient = dataSource.getConnection();
         // We need to get all supercolumns from the beginning of time until
         // now, in SLICE_SIZE chunks
         SlicePredicate predicate = new SlicePredicate();
         predicate.setSlice_range(new SliceRange(ByteBufferUtil.EMPTY_BYTE_BUFFER, ByteBufferUtil
                  .bytes(System.currentTimeMillis()), false, SLICE_SIZE));
         Map<ByteBuffer, Map<String, List<Mutation>>> mutationMap = new HashMap<ByteBuffer, Map<String, List<Mutation>>>();
         for (boolean complete = false; !complete;) {
            // Get all columns
            List<ColumnOrSuperColumn> slice = cassandraClient.get_slice(expirationKey,

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        conf = job.getConfiguration();
        setLocationFromUri(location);


        if (ConfigHelper.getInputSlicePredicate(conf) == null)
        {
            SliceRange range = new SliceRange(slice_start, slice_end, slice_reverse, limit);
            SlicePredicate predicate = new SlicePredicate().setSlice_range(range);
            ConfigHelper.setInputSlicePredicate(conf, predicate);
        }
        if (System.getenv(PIG_WIDEROW_INPUT) != null)
            widerows = Boolean.valueOf(System.getenv(PIG_WIDEROW_INPUT));

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            sp.setColumn_names(new ArrayList<ByteBuffer>(((NamesQueryFilter)predicate).columns));
        }
        else
        {
            SliceQueryFilter sqf = (SliceQueryFilter)predicate;
            sp.setSlice_range(new SliceRange(sqf.start(), sqf.finish(), sqf.reversed, sqf.count));
        }
        return sp;
    }

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        ByteBuffer startCol = ByteBufferUtil.bytes("Start");
        ByteBuffer stopCol = ByteBufferUtil.bytes("Stop");
        ByteBuffer emptyCol = ByteBufferUtil.bytes("");
        SlicePredicate namesPred = new SlicePredicate();
        namesPred.column_names = Statics.NamedCols;
        SliceRange emptySliceRange = new SliceRange(emptyCol, emptyCol, false, 100);
        SliceRange nonEmptySliceRange = new SliceRange(startCol, stopCol, true, 100);
        SlicePredicate emptyRangePred = new SlicePredicate();
        emptyRangePred.slice_range = emptySliceRange;
        SlicePredicate nonEmptyRangePred = new SlicePredicate();
        nonEmptyRangePred.slice_range = nonEmptySliceRange;
        IPartitioner part = StorageService.getPartitioner();

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        {
            throw new IOException("Expected 'cassandra://<keyspace>/<columnfamily>': " + e.getMessage());
        }


        // and configure
        SliceRange range = new SliceRange(BOUND, BOUND, false, LIMIT);
        SlicePredicate predicate = new SlicePredicate().setSlice_range(range);
        conf = job.getConfiguration();
        ConfigHelper.setInputSlicePredicate(conf, predicate);
        ConfigHelper.setInputColumnFamily(conf, ksname, cfname);

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            final SortedSet<byte[]> columnNameSet = new TreeSet<byte[]>(comparator);
            columnNameSet.addAll(predicate.column_names);
            return new NamesQueryFilter(columnNameSet);
        }


        SliceRange range = predicate.slice_range;
        return new SliceQueryFilter(range.start, range.finish, range.reversed, range.count);
    }

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    {
        SlicePredicate thriftSlicePredicate = new SlicePredicate();


        if (isColumnRange())
        {
            SliceRange sliceRange = new SliceRange();
            sliceRange.start = getRequestedBound(Bound.START, variables);
            sliceRange.finish = getRequestedBound(Bound.END, variables);
            sliceRange.reversed = parameters.isColumnsReversed;
            sliceRange.count = -1; // We use this for range slices, where the count is ignored in favor of the global column count
            thriftSlicePredicate.slice_range = sliceRange;

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