use of org.apache.druid.client.CachingQueryRunner in project druid by druid-io.
the class ServerManager method buildAndDecorateQueryRunner.
private <T> QueryRunner<T> buildAndDecorateQueryRunner(final QueryRunnerFactory<T, Query<T>> factory, final QueryToolChest<T, Query<T>> toolChest, final SegmentReference segment, final Optional<byte[]> cacheKeyPrefix, final SegmentDescriptor segmentDescriptor, final AtomicLong cpuTimeAccumulator) {
final SpecificSegmentSpec segmentSpec = new SpecificSegmentSpec(segmentDescriptor);
final SegmentId segmentId = segment.getId();
final Interval segmentInterval = segment.getDataInterval();
// If the segment is closed after this line, ReferenceCountingSegmentQueryRunner will handle and do the right thing.
if (segmentId == null || segmentInterval == null) {
return new ReportTimelineMissingSegmentQueryRunner<>(segmentDescriptor);
}
String segmentIdString = segmentId.toString();
MetricsEmittingQueryRunner<T> metricsEmittingQueryRunnerInner = new MetricsEmittingQueryRunner<>(emitter, toolChest, new ReferenceCountingSegmentQueryRunner<>(factory, segment, segmentDescriptor), QueryMetrics::reportSegmentTime, queryMetrics -> queryMetrics.segment(segmentIdString));
StorageAdapter storageAdapter = segment.asStorageAdapter();
long segmentMaxTime = storageAdapter.getMaxTime().getMillis();
long segmentMinTime = storageAdapter.getMinTime().getMillis();
Interval actualDataInterval = Intervals.utc(segmentMinTime, segmentMaxTime + 1);
CachingQueryRunner<T> cachingQueryRunner = new CachingQueryRunner<>(segmentIdString, cacheKeyPrefix, segmentDescriptor, actualDataInterval, objectMapper, cache, toolChest, metricsEmittingQueryRunnerInner, cachePopulator, cacheConfig);
BySegmentQueryRunner<T> bySegmentQueryRunner = new BySegmentQueryRunner<>(segmentId, segmentInterval.getStart(), cachingQueryRunner);
MetricsEmittingQueryRunner<T> metricsEmittingQueryRunnerOuter = new MetricsEmittingQueryRunner<>(emitter, toolChest, bySegmentQueryRunner, QueryMetrics::reportSegmentAndCacheTime, queryMetrics -> queryMetrics.segment(segmentIdString)).withWaitMeasuredFromNow();
SpecificSegmentQueryRunner<T> specificSegmentQueryRunner = new SpecificSegmentQueryRunner<>(metricsEmittingQueryRunnerOuter, segmentSpec);
PerSegmentOptimizingQueryRunner<T> perSegmentOptimizingQueryRunner = new PerSegmentOptimizingQueryRunner<>(specificSegmentQueryRunner, new PerSegmentQueryOptimizationContext(segmentDescriptor));
return new SetAndVerifyContextQueryRunner<>(serverConfig, CPUTimeMetricQueryRunner.safeBuild(perSegmentOptimizingQueryRunner, toolChest, emitter, cpuTimeAccumulator, false));
}
use of org.apache.druid.client.CachingQueryRunner in project druid by druid-io.
the class SinkQuerySegmentWalker method getQueryRunnerForSegments.
@Override
public <T> QueryRunner<T> getQueryRunnerForSegments(final Query<T> query, final Iterable<SegmentDescriptor> specs) {
// We only handle one particular dataSource. Make sure that's what we have, then ignore from here on out.
final DataSourceAnalysis analysis = DataSourceAnalysis.forDataSource(query.getDataSource());
// Sanity check: make sure the query is based on the table we're meant to handle.
if (!analysis.getBaseTableDataSource().filter(ds -> dataSource.equals(ds.getName())).isPresent()) {
throw new ISE("Cannot handle datasource: %s", analysis.getDataSource());
}
final QueryRunnerFactory<T, Query<T>> factory = conglomerate.findFactory(query);
if (factory == null) {
throw new ISE("Unknown query type[%s].", query.getClass());
}
final QueryToolChest<T, Query<T>> toolChest = factory.getToolchest();
final boolean skipIncrementalSegment = query.getContextValue(CONTEXT_SKIP_INCREMENTAL_SEGMENT, false);
final AtomicLong cpuTimeAccumulator = new AtomicLong(0L);
// Make sure this query type can handle the subquery, if present.
if (analysis.isQuery() && !toolChest.canPerformSubquery(((QueryDataSource) analysis.getDataSource()).getQuery())) {
throw new ISE("Cannot handle subquery: %s", analysis.getDataSource());
}
// segmentMapFn maps each base Segment into a joined Segment if necessary.
final Function<SegmentReference, SegmentReference> segmentMapFn = joinableFactoryWrapper.createSegmentMapFn(analysis.getJoinBaseTableFilter().map(Filters::toFilter).orElse(null), analysis.getPreJoinableClauses(), cpuTimeAccumulator, analysis.getBaseQuery().orElse(query));
// We compute the join cache key here itself so it doesn't need to be re-computed for every segment
final Optional<byte[]> cacheKeyPrefix = analysis.isJoin() ? joinableFactoryWrapper.computeJoinDataSourceCacheKey(analysis) : Optional.of(StringUtils.EMPTY_BYTES);
Iterable<QueryRunner<T>> perSegmentRunners = Iterables.transform(specs, descriptor -> {
final PartitionChunk<Sink> chunk = sinkTimeline.findChunk(descriptor.getInterval(), descriptor.getVersion(), descriptor.getPartitionNumber());
if (chunk == null) {
return new ReportTimelineMissingSegmentQueryRunner<>(descriptor);
}
final Sink theSink = chunk.getObject();
final SegmentId sinkSegmentId = theSink.getSegment().getId();
Iterable<QueryRunner<T>> perHydrantRunners = new SinkQueryRunners<>(Iterables.transform(theSink, hydrant -> {
// Hydrant might swap at any point, but if it's swapped at the start
// then we know it's *definitely* swapped.
final boolean hydrantDefinitelySwapped = hydrant.hasSwapped();
if (skipIncrementalSegment && !hydrantDefinitelySwapped) {
return new Pair<>(hydrant.getSegmentDataInterval(), new NoopQueryRunner<>());
}
// Prevent the underlying segment from swapping when its being iterated
final Optional<Pair<SegmentReference, Closeable>> maybeSegmentAndCloseable = hydrant.getSegmentForQuery(segmentMapFn);
// if optional isn't present, we failed to acquire reference to the segment or any joinables
if (!maybeSegmentAndCloseable.isPresent()) {
return new Pair<>(hydrant.getSegmentDataInterval(), new ReportTimelineMissingSegmentQueryRunner<>(descriptor));
}
final Pair<SegmentReference, Closeable> segmentAndCloseable = maybeSegmentAndCloseable.get();
try {
QueryRunner<T> runner = factory.createRunner(segmentAndCloseable.lhs);
// 2) Hydrants are not the same between replicas, make sure cache is local
if (hydrantDefinitelySwapped && cache.isLocal()) {
StorageAdapter storageAdapter = segmentAndCloseable.lhs.asStorageAdapter();
long segmentMinTime = storageAdapter.getMinTime().getMillis();
long segmentMaxTime = storageAdapter.getMaxTime().getMillis();
Interval actualDataInterval = Intervals.utc(segmentMinTime, segmentMaxTime + 1);
runner = new CachingQueryRunner<>(makeHydrantCacheIdentifier(hydrant), cacheKeyPrefix, descriptor, actualDataInterval, objectMapper, cache, toolChest, runner, // Always populate in foreground regardless of config
new ForegroundCachePopulator(objectMapper, cachePopulatorStats, cacheConfig.getMaxEntrySize()), cacheConfig);
}
// Make it always use Closeable to decrement()
runner = QueryRunnerHelper.makeClosingQueryRunner(runner, segmentAndCloseable.rhs);
return new Pair<>(segmentAndCloseable.lhs.getDataInterval(), runner);
} catch (Throwable e) {
throw CloseableUtils.closeAndWrapInCatch(e, segmentAndCloseable.rhs);
}
}));
return new SpecificSegmentQueryRunner<>(withPerSinkMetrics(new BySegmentQueryRunner<>(sinkSegmentId, descriptor.getInterval().getStart(), factory.mergeRunners(DirectQueryProcessingPool.INSTANCE, perHydrantRunners)), toolChest, sinkSegmentId, cpuTimeAccumulator), new SpecificSegmentSpec(descriptor));
});
final QueryRunner<T> mergedRunner = toolChest.mergeResults(factory.mergeRunners(queryProcessingPool, perSegmentRunners));
return CPUTimeMetricQueryRunner.safeBuild(new FinalizeResultsQueryRunner<>(mergedRunner, toolChest), toolChest, emitter, cpuTimeAccumulator, true);
}
Aggregations