Elasticsearch 之（49） Java API 基於search template實現按品牌分頁查詢模板

es的config/scripts目錄下，預先保存搜索模板，后綴名是.mustache，文件名是page_query_by_brand

{
  "from": {{from}},
  "size": {{size}},
  "query": {
    "match": {
      "brand.keyword": "{{brand}}" 
    }
  }
}

在 《 Elasticsearch 之（36）使用search template將搜索模板化》篇幅中，詳細講解了模版的創建和保存。

在進行 條件 search template 查詢

package com.es.app;


import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.script.ScriptType;
import org.elasticsearch.script.mustache.SearchTemplateRequestBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.transport.client.PreBuiltTransportClient;

import java.net.InetAddress;
import java.util.HashMap;
import java.util.Map;

public class SearchTemplatePageQueryApp {

    public static void main(String[] args) throws Exception {
        Settings settings = Settings.builder()
                .put("cluster.name", "elasticsearch")
                .put("client.transport.sniff", true)
                .build();

        TransportClient client = new PreBuiltTransportClient(settings)
                .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("localhost"), 9300));

        Map<String, Object> scriptParams = new HashMap<>();
        scriptParams.put("from", 0);
        scriptParams.put("size", 1);
        scriptParams.put("brand", "寶馬");

        SearchResponse searchResponse = new SearchTemplateRequestBuilder(client)
                .setScript("page_query_by_brand")
                .setScriptType(ScriptType.FILE)
                .setScriptParams(scriptParams)
                .setRequest(new SearchRequest("car_shop").types("sales"))
                .get()
                .getResponse();

        for(SearchHit searchHit : searchResponse.getHits().getHits()) {
            System.out.println(searchHit.getSourceAsString());
        }

        client.close();
    }

}