Examples with CassandraRow org.apache.gora.cassandra.query.CassandraRow used on opensource projects

Example 1 with CassandraRow

use of org.apache.gora.cassandra.query.CassandraRow in project gora by apache.

the class CassandraStore method addSubColumns.

/**
   * When we add subcolumns, Gora keys are mapped to Cassandra partition keys only. 
   * This is because we follow the Cassandra logic where column family data is 
   * partitioned across nodes based on row Key.
   */
private void addSubColumns(String family, CassandraQuery<K, T> cassandraQuery, CassandraResultSet<K> cassandraResultSet) {
    // select family columns that are included in the query
    List<Row<K, ByteBuffer, ByteBuffer>> rows = this.cassandraClient.execute(cassandraQuery, family);
    for (Row<K, ByteBuffer, ByteBuffer> row : rows) {
        K key = row.getKey();
        // find associated row in the resultset
        CassandraRow<K> cassandraRow = cassandraResultSet.getRow(key);
        if (cassandraRow == null) {
            cassandraRow = new CassandraRow<>();
            cassandraResultSet.putRow(key, cassandraRow);
            cassandraRow.setKey(key);
        }
        ColumnSlice<ByteBuffer, ByteBuffer> columnSlice = row.getColumnSlice();
        for (HColumn<ByteBuffer, ByteBuffer> hColumn : columnSlice.getColumns()) {
            CassandraSubColumn cassandraSubColumn = new CassandraSubColumn();
            cassandraSubColumn.setValue(hColumn);
            cassandraSubColumn.setFamily(family);
            cassandraRow.add(cassandraSubColumn);
        }
    }
}