Examples with WindowRangeQuery org.apache.kafka.streams.query.WindowRangeQuery used on opensource projects

Example 1 with WindowRangeQuery

use of org.apache.kafka.streams.query.WindowRangeQuery in project ksql by confluentinc.

the class KsMaterializedWindowTableIQv2 method get.

public KsMaterializedQueryResult<WindowedRow> get(final int partition, final Range<Instant> windowStartBounds, final Range<Instant> windowEndBounds, final Optional<Position> position) {
    try {
        final Instant lower = calculateLowerBound(windowStartBounds, windowEndBounds);
        final Instant upper = calculateUpperBound(windowStartBounds, windowEndBounds);
        final WindowRangeQuery<GenericKey, ValueAndTimestamp<GenericRow>> query = WindowRangeQuery.withWindowStartRange(lower, upper);
        StateQueryRequest<KeyValueIterator<Windowed<GenericKey>, ValueAndTimestamp<GenericRow>>> request = inStore(stateStore.getStateStoreName()).withQuery(query);
        if (position.isPresent()) {
            request = request.withPositionBound(PositionBound.at(position.get()));
        }
        final StateQueryResult<KeyValueIterator<Windowed<GenericKey>, ValueAndTimestamp<GenericRow>>> result = stateStore.getKafkaStreams().query(request);
        final QueryResult<KeyValueIterator<Windowed<GenericKey>, ValueAndTimestamp<GenericRow>>> queryResult = result.getPartitionResults().get(partition);
        if (queryResult.isFailure()) {
            throw failedQueryException(queryResult);
        }
        final KeyValueIterator<Windowed<GenericKey>, ValueAndTimestamp<GenericRow>> iterator = queryResult.getResult();
        return KsMaterializedQueryResult.rowIteratorWithPosition(Streams.stream(IteratorUtil.onComplete(iterator, iterator::close)).map(next -> {
            final Instant windowStart = next.key.window().startTime();
            if (!windowStartBounds.contains(windowStart)) {
                return null;
            }
            final Instant windowEnd = next.key.window().endTime();
            if (!windowEndBounds.contains(windowEnd)) {
                return null;
            }
            final TimeWindow window = new TimeWindow(windowStart.toEpochMilli(), windowEnd.toEpochMilli());
            final WindowedRow row = WindowedRow.of(stateStore.schema(), new Windowed<>(next.key.key(), window), next.value.value(), next.value.timestamp());
            return row;
        }).filter(Objects::nonNull).iterator(), queryResult.getPosition());
    } catch (final NotUpToBoundException | MaterializationException e) {
        throw e;
    } catch (final Exception e) {
        throw new MaterializationException("Failed to get value from materialized table", e);
    }
}