示例#1
0
  public void addDeletion(SearchRequestBuilder searchRequest) {
    searchRequest
        .addSort("_doc", SortOrder.ASC)
        .setScroll(TimeValue.timeValueMinutes(5))
        .setSize(100)
        // load only doc ids, not _source fields
        .setFetchSource(false);

    // this search is synchronous. An optimization would be to be non-blocking,
    // but it requires to tracking pending requests in close().
    // Same semaphore can't be reused because of potential deadlock (requires to acquire
    // two locks)
    SearchResponse searchResponse = searchRequest.get();

    while (true) {
      SearchHit[] hits = searchResponse.getHits().getHits();
      for (SearchHit hit : hits) {
        DeleteRequestBuilder deleteRequestBuilder =
            client.prepareDelete(hit.index(), hit.type(), hit.getId());
        SearchHitField routing = hit.field("_routing");
        if (routing != null) {
          deleteRequestBuilder.setRouting(routing.getValue());
        }
        add(deleteRequestBuilder.request());
      }

      String scrollId = searchResponse.getScrollId();
      searchResponse =
          client.prepareSearchScroll(scrollId).setScroll(TimeValue.timeValueMinutes(5)).get();
      if (hits.length == 0) {
        client.nativeClient().prepareClearScroll().addScrollId(scrollId).get();
        break;
      }
    }
  }
    @Override
    public TopDocs topDocs(SearchContext context, FetchSubPhase.HitContext hitContext)
        throws IOException {
      final String field;
      final String term;
      if (isParentHit(hitContext.hit())) {
        field = ParentFieldMapper.NAME;
        term = Uid.createUid(hitContext.hit().type(), hitContext.hit().id());
      } else if (isChildHit(hitContext.hit())) {
        field = UidFieldMapper.NAME;
        SearchHitField parentField = hitContext.hit().field(ParentFieldMapper.NAME);
        if (parentField != null) {
          term = parentField.getValue();
        } else {
          SingleFieldsVisitor fieldsVisitor = new SingleFieldsVisitor(ParentFieldMapper.NAME);
          hitContext.reader().document(hitContext.docId(), fieldsVisitor);
          if (fieldsVisitor.fields().isEmpty()) {
            return Lucene.EMPTY_TOP_DOCS;
          }
          term = (String) fieldsVisitor.fields().get(ParentFieldMapper.NAME).get(0);
        }
      } else {
        return Lucene.EMPTY_TOP_DOCS;
      }
      // Only include docs that have the current hit as parent
      Filter filter = new TermFilter(new Term(field, term));
      // Only include docs that have this inner hits type
      Filter typeFilter = documentMapper.typeFilter();

      if (size() == 0) {
        TotalHitCountCollector collector = new TotalHitCountCollector();
        context
            .searcher()
            .search(
                new XFilteredQuery(query, new AndFilter(Arrays.asList(filter, typeFilter))),
                collector);
        return new TopDocs(collector.getTotalHits(), Lucene.EMPTY_SCORE_DOCS, 0);
      } else {
        int topN = from() + size();
        TopDocsCollector topDocsCollector;
        if (sort() != null) {
          topDocsCollector =
              TopFieldCollector.create(sort(), topN, true, trackScores(), trackScores(), false);
        } else {
          topDocsCollector = TopScoreDocCollector.create(topN, false);
        }
        context
            .searcher()
            .search(
                new XFilteredQuery(query, new AndFilter(Arrays.asList(filter, typeFilter))),
                topDocsCollector);
        return topDocsCollector.topDocs(from(), size());
      }
    }
 private String buildJSONFromFields(Collection<SearchHitField> values) {
   JsonFactory nodeFactory = new JsonFactory();
   try {
     ByteArrayOutputStream stream = new ByteArrayOutputStream();
     JsonGenerator generator = nodeFactory.createGenerator(stream, JsonEncoding.UTF8);
     generator.writeStartObject();
     for (SearchHitField value : values) {
       if (value.getValues().size() > 1) {
         generator.writeArrayFieldStart(value.getName());
         for (Object val : value.getValues()) {
           generator.writeObject(val);
         }
         generator.writeEndArray();
       } else {
         generator.writeObjectField(value.getName(), value.getValue());
       }
     }
     generator.writeEndObject();
     generator.flush();
     return new String(stream.toByteArray(), Charset.forName("UTF-8"));
   } catch (IOException e) {
     return null;
   }
 }