@Override
public void writeTo(StreamOutput out) throws IOException {
super.writeTo(out);
out.writeByte(percolatorTypeId);
out.writeVLong(requestedSize);
out.writeVLong(count);
out.writeVInt(matches.length);
for (BytesRef match : matches) {
out.writeBytesRef(match);
}
out.writeVLong(scores.length);
for (float score : scores) {
out.writeFloat(score);
}
out.writeVInt(hls.size());
for (Map<String, HighlightField> hl : hls) {
out.writeVInt(hl.size());
for (Map.Entry<String, HighlightField> entry : hl.entrySet()) {
out.writeString(entry.getKey());
entry.getValue().writeTo(out);
}
}
out.writeOptionalStreamable(aggregations);
if (pipelineAggregators == null) {
out.writeBoolean(false);
} else {
out.writeBoolean(true);
out.writeVInt(pipelineAggregators.size());
for (PipelineAggregator pipelineAggregator : pipelineAggregators) {
out.writeBytesReference(pipelineAggregator.type().stream());
pipelineAggregator.writeTo(out);
}
}
}
@Override
public void execute(SearchContext context) {
if (context.aggregations() == null) {
context.queryResult().aggregations(null);
return;
}
if (context.queryResult().aggregations() != null) {
// no need to compute the aggs twice, they should be computed on a per context basis
return;
}
Aggregator[] aggregators = context.aggregations().aggregators();
List<Aggregator> globals = new ArrayList<>();
for (int i = 0; i < aggregators.length; i++) {
if (aggregators[i] instanceof GlobalAggregator) {
globals.add(aggregators[i]);
}
}
// optimize the global collector based execution
if (!globals.isEmpty()) {
BucketCollector globalsCollector = BucketCollector.wrap(globals);
Query query = Queries.newMatchAllQuery();
Query searchFilter = context.searchFilter(context.types());
if (searchFilter != null) {
BooleanQuery filtered =
new BooleanQuery.Builder()
.add(query, Occur.MUST)
.add(searchFilter, Occur.FILTER)
.build();
query = filtered;
}
try {
final Collector collector;
if (context.getProfilers() == null) {
collector = globalsCollector;
} else {
InternalProfileCollector profileCollector =
new InternalProfileCollector(
globalsCollector,
CollectorResult.REASON_AGGREGATION_GLOBAL,
// TODO: report on sub collectors
Collections.emptyList());
collector = profileCollector;
// start a new profile with this collector
context.getProfilers().addProfiler().setCollector(profileCollector);
}
globalsCollector.preCollection();
context.searcher().search(query, collector);
} catch (Exception e) {
throw new QueryPhaseExecutionException(context, "Failed to execute global aggregators", e);
} finally {
context.clearReleasables(SearchContext.Lifetime.COLLECTION);
}
}
List<InternalAggregation> aggregations = new ArrayList<>(aggregators.length);
for (Aggregator aggregator : context.aggregations().aggregators()) {
try {
aggregator.postCollection();
aggregations.add(aggregator.buildAggregation(0));
} catch (IOException e) {
throw new AggregationExecutionException(
"Failed to build aggregation [" + aggregator.name() + "]", e);
}
}
context.queryResult().aggregations(new InternalAggregations(aggregations));
try {
List<PipelineAggregator> pipelineAggregators =
context.aggregations().factories().createPipelineAggregators();
List<SiblingPipelineAggregator> siblingPipelineAggregators =
new ArrayList<>(pipelineAggregators.size());
for (PipelineAggregator pipelineAggregator : pipelineAggregators) {
if (pipelineAggregator instanceof SiblingPipelineAggregator) {
siblingPipelineAggregators.add((SiblingPipelineAggregator) pipelineAggregator);
} else {
throw new AggregationExecutionException(
"Invalid pipeline aggregation named ["
+ pipelineAggregator.name()
+ "] of type ["
+ pipelineAggregator.type().name()
+ "]. Only sibling pipeline aggregations are allowed at the top level");
}
}
context.queryResult().pipelineAggregators(siblingPipelineAggregators);
} catch (IOException e) {
throw new AggregationExecutionException("Failed to build top level pipeline aggregators", e);
}
// disable aggregations so that they don't run on next pages in case of scrolling
context.aggregations(null);
context.queryCollectors().remove(AggregationPhase.class);
}