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ElasticSearch completion suggester with Java API

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天命终不由人
天命终不由人 2021-01-21 09:12

I had tried a few example codes on suggester feature of ElasticSearch on the net but I couldn\'t solve my problem against the autocomplete solution

my index:

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2条回答
  • 北海茫月
    北海茫月 (楼主)
    2021-01-21 10:07

    Following link provides you the details of how to create a suggester index. https://www.elastic.co/blog/you-complete-me

    Now, I use asynchronous Suggestionbuilder Java API to generate suggestions based on terms. 

     SearchRequestBuilder suggestionsExtractor = elasticsearchService.suggestionsExtractor("yourIndexName", "yourIndexType//not necessary", "name_suggest", term);
        System.out.println(suggestionsExtractor);
        Map suggestionMap = new HashMap<>();
        suggestionsExtractor.execute(new ActionListener() {
            @Override
            public void onResponse(SearchResponse searchResponse) {
               if(searchResponse.status().equals(RestStatus.OK)) {
                   searchResponse.getSuggest().getSuggestion("productsearch").getEntries().forEach(e -> {
                       e.getOptions().forEach(s -> {
                           ArrayList contents = new ArrayList<>();

                           suggestionMap.put(s.getText().string(), s.getScore());

                       });
                   });


               }

            }

            @Override
            public void onFailure(Exception e) {
                Helper.sendErrorResponse(routingContext,new JsonObject().put("details","internal server error"));
                e.printStackTrace();
            }
        });



    Following is how suggestionbuilder is created.
    


    public SearchRequestBuilder suggestionsExtractor(String indexName, String typeName, String field, String term) {

        CompletionSuggestionBuilder csb = SuggestBuilders.completionSuggestion(field).text(term);
        SearchRequestBuilder suggestBuilder = client.prepareSearch()
                .suggest(new SuggestBuilder().addSuggestion(indexName, csb));
        return suggestBuilder;
    }

    
    
    
             
    
                                                        
    
            
            
    
              
                
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