Examples of com.datastax.driver.core.ResultSet

com.datastax.driver.core.ResultSet
The result of a query.
The retrieval of the rows of a ResultSet is generally paged (a first page of result is fetched and the next one is only fetched once all the results of the first one has been consumed). The size of the pages can be configured either globally through {@link QueryOptions#setFetchSize} or per-statementwith {@link Statement#setFetchSize}. Though new pages are automatically (and transparently) fetched when needed, it is possible to force the retrieval of the next page early through {@link #fetchMoreResults}. Please note however that this ResultSet paging is not available with the version 1 of the native protocol (i.e. with Cassandra 1.2 or if version 1 has been explicitly requested through {@link Cluster.Builder#withProtocolVersion}). If the protocol version 1 is in use, a ResultSet is always fetched in it's entirely and it's up to the client to make sure that no query can yield ResultSet that won't hold in memory.
Note that this class is not thread-safe.

        }
    }


    private void assertTablesDropped(String... tables) {
        Set<String> existingTables = new HashSet<String>();
        ResultSet resultSet = session.execute("SELECT columnfamily_name FROM system.schema_columnfamilies " +
            "WHERE keyspace_name = 'rhq'");
        for (Row row : resultSet) {
            existingTables.add(row.getString(0));
        }
        for (String table : tables) {

View Full Code Here

        log.info("Searching for most recent hour having raw data");


        DateTime previousHour = current1HourTimeSlice();
        DateTime oldestRawTime = previousHour.minus(Days.days(7));


        ResultSet resultSet = getIndexTimeSlice(Bucket.ONE_HOUR, previousHour);
        Row row = resultSet.one();
        while (row == null && previousHour.compareTo(oldestRawTime) > 0) {
            previousHour = previousHour.minusHours(1);
            resultSet = getIndexTimeSlice(Bucket.ONE_HOUR, previousHour);
            row = resultSet.one();
        }


        if (row == null) {
            log.info("No data found in metrics_index table");
            return null;

View Full Code Here

        private Map<String, ByteBuffer> previousRowKey = new HashMap<String, ByteBuffer>(); // previous CF row key


        public RowIterator()
        {
            AbstractType type = partitioner.getTokenValidator();
            ResultSet rs = session.execute(cqlQuery, type.compose(type.fromString(split.getStartToken())), type.compose(type.fromString(split.getEndToken())) );
            for (ColumnMetadata meta : cluster.getMetadata().getKeyspace(quote(keyspace)).getTable(quote(cfName)).getPartitionKey())
                partitionBoundColumns.put(meta.getName(), Boolean.TRUE);
            rows = rs.iterator();
        }

View Full Code Here

   */
  @Override
  public Set<EventBean> lookup(Object[] keys, EventBean[] eventsPerStream) {
    final BoundStatement boundStatement = _statement.bind(keys);


    final ResultSet cassandraResultList = _session.execute(boundStatement);


    final Set<EventBean> esperResultSet = new HashSet<EventBean>();
    final Iterator<Row> it = cassandraResultList.iterator();
    // Iterate over all results and create fresh EventBean for all
    // data results from the database query.
    while (it.hasNext()) {
      final Map<Object, Object> resultData = new HashMap<Object, Object>();
      final Row cassandraRow = it.next();

View Full Code Here

        results.add(result);
      }


    }
    
    ResultSet resultSet = null;


        if (keysToLookup.size() > 0) {
            //String[] keyStrings = new String[keysToLookup.size()];
            ByteBuffer[] keyStrings = new ByteBuffer[keysToLookup.size()];
            int count = 0;

View Full Code Here

      if (result == null)
        keysToLookup.add(0, previousKey);


      results.add(result);
    }
        ResultSet resultSet = null;


        if (keysToLookup.size() > 0) {
            //String[] keyStrings = new String[keysToLookup.size()];
            ByteBuffer[] keyStrings = new ByteBuffer[keysToLookup.size()];
            int count = 0;

View Full Code Here

    private void loadCache(boolean reverse) {
        if (cachedRows != null && cachedRows.hasNext())
            return; // There are more rows so return and the code will return
                    // the next result from cache


        ResultSet resultSet = null;


        if (needToGetBatch) {
            if (batchListener != null)
                batchListener.beforeFetchingNextBatch();

View Full Code Here


        if (batchListener != null)
            batchListener.beforeFetchingNextBatch();


        columnNameType = sliceInfo.getColumnNameType();
        ResultSet resultSet = null;
        Clause rkClause = QueryBuilder.eq("id", ByteBuffer.wrap(rowKey));
        Query query = null;
        query = QueryBuilder.select().all().from(keys, table).where(rkClause).disableTracing();


        subList = new ArrayList<com.datastax.driver.core.Row>();

View Full Code Here

    private void checkIfRowExsits(String table, byte[] rowKey, String colName) {
        Clause rkClause = QueryBuilder.eq("id", ByteBuffer.wrap(rowKey));
        Clause cnClause = QueryBuilder.eq("colname", colName);
        try {
            Query query = QueryBuilder.select().all().from(keys, table).where(rkClause).and(cnClause);
            ResultSet resultSet = session.execute(query);
            if (resultSet.isExhausted())
                return;
            else {
                Query delQuery = QueryBuilder.delete().from(keys, table).where(rkClause).and(cnClause);
                session.execute(delQuery);
            }

View Full Code Here

        }
        selectWhere.and(indClause);
        Clause keyClause = QueryBuilder.eq("colvalue", ByteBuffer.wrap(key));
        selectWhere.and(keyClause);
        Query query = selectWhere.limit(1);
        ResultSet resultSet = session.execute(query);
        return !resultSet.isExhausted();
   }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of com.datastax.driver.core.ResultSet

ch.uzh.ifi.ddis.ifp.esper.cassandra.CassandraVirtualDataWindow

ch.uzh.ifi.ddis.ifp.esper.cassandra.CassandraVirtualDataWindowLookup

com.alvazan.orm.layer9z.spi.db.cassandracql3.CqlSession

com.alvazan.orm.layer9z.spi.db.cassandracql3.CursorColumnSliceCql

com.alvazan.orm.layer9z.spi.db.cassandracql3.CursorKeysToRowsCql3

com.alvazan.orm.layer9z.spi.db.cassandracql3.CursorOfFutures

com.alvazan.orm.layer9z.spi.db.cassandracql3.CursorOfIndexes

com.cloudwick.cassandra.yelp.SimpleClient

com.ebuddy.cassandra.cql.dao.CqlStructuredDataSupport

com.impetus.kundera.client.cassandra.dsdriver.DSClient

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.