org.elasticsearch.search.SearchContextException Java Examples

/**
 * The operation that executes the query and generates a {@link TermsByQueryShardResponse} for each shard.
 */
@Override
protected TermsByQueryShardResponse shardOperation(TermsByQueryShardRequest shardRequest) throws ElasticsearchException {
  IndexService indexService = indicesService.indexServiceSafe(shardRequest.shardId().getIndex());
  IndexShard indexShard = indexService.shardSafe(shardRequest.shardId().id());
  TermsByQueryRequest request = shardRequest.request();
  OrderByShardOperation orderByOperation = OrderByShardOperation.get(request.getOrderBy(), request.maxTermsPerShard());

  SearchShardTarget shardTarget = new SearchShardTarget(clusterService.localNode().id(),
                                                        shardRequest.shardId().getIndex(),
                                                        shardRequest.shardId().id());

  ShardSearchRequest shardSearchRequest = new ShardSearchLocalRequest(request.types(), request.nowInMillis(),
                                                                      shardRequest.filteringAliases());

  SearchContext context = new DefaultSearchContext(0, shardSearchRequest, shardTarget,
    indexShard.acquireSearcher("termsByQuery"), indexService, indexShard, scriptService,
    pageCacheRecycler, bigArrays, threadPool.estimatedTimeInMillisCounter(), parseFieldMatcher,
    SearchService.NO_TIMEOUT);
  SearchContext.setCurrent(context);

  try {
    MappedFieldType fieldType = context.smartNameFieldType(request.field());
    if (fieldType == null) {
      throw new SearchContextException(context, "[termsByQuery] field '" + request.field() +
              "' not found for types " + Arrays.toString(request.types()));
    }

    IndexFieldData indexFieldData = context.fieldData().getForField(fieldType);

    BytesReference querySource = request.querySource();
    if (querySource != null && querySource.length() > 0) {
      XContentParser queryParser = null;
      try {
        queryParser = XContentFactory.xContent(querySource).createParser(querySource);
        QueryParseContext.setTypes(request.types());
        ParsedQuery parsedQuery = orderByOperation.getParsedQuery(queryParser, indexService);
        if (parsedQuery != null) {
          context.parsedQuery(parsedQuery);
        }
      }
      finally {
        QueryParseContext.removeTypes();
        if (queryParser != null) {
          queryParser.close();
        }
      }
    }

    context.preProcess();

    // execute the search only gathering the hit count and bitset for each segment
    logger.debug("{}: Executes search for collecting terms {}", Thread.currentThread().getName(),
      shardRequest.shardId());

    TermsCollector termsCollector = this.getTermsCollector(request.termsEncoding(), indexFieldData, context);
    if (request.expectedTerms() != null) termsCollector.setExpectedTerms(request.expectedTerms());
    if (request.maxTermsPerShard() != null) termsCollector.setMaxTerms(request.maxTermsPerShard());
    HitStream hitStream = orderByOperation.getHitStream(context);
    TermsSet terms = termsCollector.collect(hitStream);

    logger.debug("{}: Returns terms response with {} terms for shard {}", Thread.currentThread().getName(),
      terms.size(), shardRequest.shardId());

    return new TermsByQueryShardResponse(shardRequest.shardId(), terms);
  }
  catch (Throwable e) {
    logger.error("[termsByQuery] Error executing shard operation", e);
    throw new QueryPhaseExecutionException(context, "[termsByQuery] Failed to execute query", e);
  }
  finally {
    // this will also release the index searcher
    context.close();
    SearchContext.removeCurrent();
  }
}