@Override
public boolean matchesSafely(Engine.Searcher searcher) {
try {
long count = Lucene.count(searcher.searcher(), query);
return count == totalHits;
} catch (IOException e) {
return false;
}
}
@Override
protected ShardCountResponse shardOperation(ShardCountRequest request)
throws ElasticsearchException {
IndexService indexService = indicesService.indexServiceSafe(request.shardId().getIndex());
IndexShard indexShard = indexService.shardSafe(request.shardId().id());
SearchShardTarget shardTarget =
new SearchShardTarget(
clusterService.localNode().id(), request.shardId().getIndex(), request.shardId().id());
SearchContext context =
new DefaultSearchContext(
0,
new ShardSearchLocalRequest(
request.types(), request.nowInMillis(), request.filteringAliases()),
shardTarget,
indexShard.acquireSearcher("count"),
indexService,
indexShard,
scriptService,
cacheRecycler,
pageCacheRecycler,
bigArrays,
threadPool.estimatedTimeInMillisCounter());
SearchContext.setCurrent(context);
try {
// TODO: min score should move to be "null" as a value that is not initialized...
if (request.minScore() != -1) {
context.minimumScore(request.minScore());
}
BytesReference source = request.querySource();
if (source != null && source.length() > 0) {
try {
QueryParseContext.setTypes(request.types());
context.parsedQuery(indexService.queryParserService().parseQuery(source));
} finally {
QueryParseContext.removeTypes();
}
}
final boolean hasTerminateAfterCount = request.terminateAfter() != DEFAULT_TERMINATE_AFTER;
boolean terminatedEarly = false;
context.preProcess();
try {
long count;
if (hasTerminateAfterCount) {
final Lucene.EarlyTerminatingCollector countCollector =
Lucene.createCountBasedEarlyTerminatingCollector(request.terminateAfter());
terminatedEarly =
Lucene.countWithEarlyTermination(context.searcher(), context.query(), countCollector);
count = countCollector.count();
} else {
count = Lucene.count(context.searcher(), context.query());
}
return new ShardCountResponse(request.shardId(), count, terminatedEarly);
} catch (Exception e) {
throw new QueryPhaseExecutionException(context, "failed to execute count", e);
}
} finally {
// this will also release the index searcher
context.close();
SearchContext.removeCurrent();
}
}