elasticsearch 自定义 script score JavaAPI查询
来源:互联网 发布:黄金交易行情软件 编辑:程序博客网 时间:2024/06/05 05:19
一:自定义score的应用场景
先打个比方,比如新产品上架了,我想让最新上架的产品搜索时候,排在前面,怎么办呢?很简单按时间排序。嗯这种方法很好实现。
但下面又有个需求,比如我要求排序中上架时间的比重为40%,自营产品为20%,促销产品的比重为40%,这怎么排序呢?单单靠排序估计很难实现。(不排除有些大神可以实现哈)。下面就介绍一个简单的实现方法,自定义score
二:自定义score的官方介绍见下面链接,大家有兴趣的可以看看哈
https://www.elastic.co/guide/en/elasticsearch/reference/5.1/query-dsl-function-score-query.html
"script_score": { "script": { "lang": "painless", "params": { "param1": value1, "param2": value2 }, "inline": "_score * doc['my_numeric_field'].value / Math.pow(params.param1, params.param2)" }}三 : Java API实现自定义score
3.1:自定义field score
TransportClient client =TransportClient.builder().settings(Settings.EMPTY).build() .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("localhost"), 9300)); // QueryBuilder queryBuilder = QueryBuilders.functionScoreQuery().scoreMode(scoreMode) SearchResponse scrollResponse = client.prepareSearch("testproduct") //.addSort("price", SortOrder.DESC) .setSearchType(SearchType.SCAN).setSize(10000).setScroll(TimeValue.timeValueMinutes(1)) .setQuery(functionScoreQuery(QueryBuilders.matchPhraseQuery("title", "美白洗面奶"), fieldValueFactorFunction("pop").modifier(FieldValueFactorFunction.Modifier.SQRT))) .execute().actionGet(); long count = scrollResponse.getHits().getTotalHits();//第一次不返回数据 for(int i=0,sum=0; sum<count; i++){ scrollResponse = client.prepareSearchScroll(scrollResponse.getScrollId()) .setScroll(TimeValue.timeValueMinutes(8)) .execute().actionGet(); sum += scrollResponse.getHits().hits().length; System.out.println("总量"+count+" 已经查到"+sum); SearchHit[] hits = scrollResponse.getHits().getHits(); for(int j =0;j<hits.length;j++){ System.out.println(hits[j].getSourceAsString()); System.out.println(hits[j].getScore()); } // System.out.println(hits[0].getSourceAsString()); }
3.2:自定义的script score java API
在elasticsearch.yml配置中增加如下配置
script.inline: on
script.indexed: on
script.engine.groovy.inline.aggs: on
private static void fromSize() throws UnknownHostException, ParseException { Map<String, Object> params = new HashMap<>(); params.put("num1", 1); params.put("num2", 2); String f = "2016-12-15"; SimpleDateFormat dateForamt = new SimpleDateFormat("yyyy-mm-dd"); long timeNow =dateForamt.parse(f).getTime() ; System.out.println(timeNow); String inlineScript = "diff="+timeNow+"-doc['regit'].value;" + "return (diff/ (24 * 60 * 60 * 1000))"; Script script = new Script(inlineScript, ScriptType.INLINE, "groovy", params); ScriptScoreFunctionBuilder scriptBuilder = ScoreFunctionBuilders.scriptFunction(script); TransportClient client =TransportClient.builder().build() .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("LOCALHOST"), 9300)); long count = client.prepareCount("dateproduct").setTypes("product").execute().actionGet().getCount(); SearchRequestBuilder requestBuilder = client.prepareSearch("dateproduct") .setTypes("product") .setQuery(functionScoreQuery(QueryBuilders.matchPhraseQuery("title", "美白洗面奶"),scriptBuilder)); SearchResponse response = requestBuilder.setFrom(0).setSize(5).execute().actionGet(); long sum = response.getHits().hits().length; System.out.println("总量"+count+" 已经查到"+sum); SearchHit[] hits = response.getHits().getHits(); for(int j =0;j<hits.length;j++){ System.out.println(hits[j].getSourceAsString()); System.out.println(hits[j].getScore()); } }
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