private InternalFacets reduceFacets(List<PercolateShardResponse> shardResults) {
if (shardResults.get(0).facets() == null) {
return null;
}
if (shardResults.size() == 1) {
return shardResults.get(0).facets();
}
PercolateShardResponse firstShardResponse = shardResults.get(0);
List<Facet> aggregatedFacets = Lists.newArrayList();
List<Facet> namedFacets = Lists.newArrayList();
for (Facet facet : firstShardResponse.facets()) {
// aggregate each facet name into a single list, and aggregate it
namedFacets.clear();
for (PercolateShardResponse entry : shardResults) {
for (Facet facet1 : entry.facets()) {
if (facet.getName().equals(facet1.getName())) {
namedFacets.add(facet1);
}
}
}
if (!namedFacets.isEmpty()) {
Facet aggregatedFacet =
((InternalFacet) namedFacets.get(0))
.reduce(new InternalFacet.ReduceContext(cacheRecycler, namedFacets));
aggregatedFacets.add(aggregatedFacet);
}
}
return new InternalFacets(aggregatedFacets);
}
public InternalSearchResponse merge(
ScoreDoc[] sortedDocs,
AtomicArray<? extends QuerySearchResultProvider> queryResultsArr,
AtomicArray<? extends FetchSearchResultProvider> fetchResultsArr) {
List<? extends AtomicArray.Entry<? extends QuerySearchResultProvider>> queryResults =
queryResultsArr.asList();
List<? extends AtomicArray.Entry<? extends FetchSearchResultProvider>> fetchResults =
fetchResultsArr.asList();
if (queryResults.isEmpty()) {
return InternalSearchResponse.empty();
}
QuerySearchResult firstResult = queryResults.get(0).value.queryResult();
boolean sorted = false;
int sortScoreIndex = -1;
if (firstResult.topDocs() instanceof TopFieldDocs) {
sorted = true;
TopFieldDocs fieldDocs = (TopFieldDocs) firstResult.queryResult().topDocs();
for (int i = 0; i < fieldDocs.fields.length; i++) {
if (fieldDocs.fields[i].getType() == SortField.Type.SCORE) {
sortScoreIndex = i;
}
}
}
// merge facets
InternalFacets facets = null;
if (!queryResults.isEmpty()) {
// we rely on the fact that the order of facets is the same on all query results
if (firstResult.facets() != null
&& firstResult.facets().facets() != null
&& !firstResult.facets().facets().isEmpty()) {
List<Facet> aggregatedFacets = Lists.newArrayList();
List<Facet> namedFacets = Lists.newArrayList();
for (Facet facet : firstResult.facets()) {
// aggregate each facet name into a single list, and aggregate it
namedFacets.clear();
for (AtomicArray.Entry<? extends QuerySearchResultProvider> entry : queryResults) {
for (Facet facet1 : entry.value.queryResult().facets()) {
if (facet.getName().equals(facet1.getName())) {
namedFacets.add(facet1);
}
}
}
if (!namedFacets.isEmpty()) {
Facet aggregatedFacet =
((InternalFacet) namedFacets.get(0))
.reduce(new InternalFacet.ReduceContext(cacheRecycler, namedFacets));
aggregatedFacets.add(aggregatedFacet);
}
}
facets = new InternalFacets(aggregatedFacets);
}
}
// count the total (we use the query result provider here, since we might not get any hits (we
// scrolled past them))
long totalHits = 0;
float maxScore = Float.NEGATIVE_INFINITY;
boolean timedOut = false;
Boolean terminatedEarly = null;
for (AtomicArray.Entry<? extends QuerySearchResultProvider> entry : queryResults) {
QuerySearchResult result = entry.value.queryResult();
if (result.searchTimedOut()) {
timedOut = true;
}
if (result.terminatedEarly() != null) {
if (terminatedEarly == null) {
terminatedEarly = result.terminatedEarly();
} else if (result.terminatedEarly()) {
terminatedEarly = true;
}
}
totalHits += result.topDocs().totalHits;
if (!Float.isNaN(result.topDocs().getMaxScore())) {
maxScore = Math.max(maxScore, result.topDocs().getMaxScore());
}
}
if (Float.isInfinite(maxScore)) {
maxScore = Float.NaN;
}
// clean the fetch counter
for (AtomicArray.Entry<? extends FetchSearchResultProvider> entry : fetchResults) {
entry.value.fetchResult().initCounter();
}
// merge hits
List<InternalSearchHit> hits = new ArrayList<>();
if (!fetchResults.isEmpty()) {
for (ScoreDoc shardDoc : sortedDocs) {
FetchSearchResultProvider fetchResultProvider = fetchResultsArr.get(shardDoc.shardIndex);
if (fetchResultProvider == null) {
continue;
}
FetchSearchResult fetchResult = fetchResultProvider.fetchResult();
int index = fetchResult.counterGetAndIncrement();
if (index < fetchResult.hits().internalHits().length) {
InternalSearchHit searchHit = fetchResult.hits().internalHits()[index];
searchHit.score(shardDoc.score);
searchHit.shard(fetchResult.shardTarget());
if (sorted) {
FieldDoc fieldDoc = (FieldDoc) shardDoc;
searchHit.sortValues(fieldDoc.fields);
if (sortScoreIndex != -1) {
searchHit.score(((Number) fieldDoc.fields[sortScoreIndex]).floatValue());
}
}
hits.add(searchHit);
}
}
}
// merge suggest results
Suggest suggest = null;
if (!queryResults.isEmpty()) {
final Map<String, List<Suggest.Suggestion>> groupedSuggestions = new HashMap<>();
boolean hasSuggestions = false;
for (AtomicArray.Entry<? extends QuerySearchResultProvider> entry : queryResults) {
Suggest shardResult = entry.value.queryResult().queryResult().suggest();
if (shardResult == null) {
continue;
}
hasSuggestions = true;
Suggest.group(groupedSuggestions, shardResult);
}
suggest =
hasSuggestions
? new Suggest(Suggest.Fields.SUGGEST, Suggest.reduce(groupedSuggestions))
: null;
}
// merge addAggregation
InternalAggregations aggregations = null;
if (!queryResults.isEmpty()) {
if (firstResult.aggregations() != null && firstResult.aggregations().asList() != null) {
List<InternalAggregations> aggregationsList = new ArrayList<>(queryResults.size());
for (AtomicArray.Entry<? extends QuerySearchResultProvider> entry : queryResults) {
aggregationsList.add((InternalAggregations) entry.value.queryResult().aggregations());
}
aggregations =
InternalAggregations.reduce(
aggregationsList, new ReduceContext(null, bigArrays, scriptService));
}
}
InternalSearchHits searchHits =
new InternalSearchHits(
hits.toArray(new InternalSearchHit[hits.size()]), totalHits, maxScore);
return new InternalSearchResponse(
searchHits, facets, aggregations, suggest, timedOut, terminatedEarly);
}