Question

Elasticsearch ：6.1.2

我有一个通过JSON的输入查询，并希望使用high level Java API使用该查询数据构建搜索请求。

String jsonQuery = "..."
SearchRequest searchRequest = new SearchRequest()
SearchSourceBuilder builder = ?
searchRequest.source(builder);

我尝试通过以下方式构建构建器：

SearchSourceBuilder.fromXContent(XContentType.JSON.xContent().createParser(NamedXContentRegistry.EMPTY, query));

但是产生了：

引起：org.elasticsearch.ElasticsearchException：namedObject is 这个解析器不支持 org.elasticsearch.common.xcontent.NamedXContentRegistry.parseNamedObject（NamedXContentRegistry.java:129）〜[elasticsearch-6.1.2.jar：6.1.2] at org.elasticsearch.common.xcontent.support.AbstractXContentParser.namedObject（AbstractXContentParser.java:402）〜[elasticsearch-6.1.2.jar：6.1.2] at org.elasticsearch.index.query.AbstractQueryBuilder.parseInnerQueryBuilder（AbstractQueryBuilder.java:313）〜[elasticsearch-6.1.2.jar：6.1.2] at org.elasticsearch.search.builder.SearchSourceBuilder.parseXContent（SearchSourceBuilder.java:1003）〜[elasticsearch-6.1.2.jar：6.1.2] at org.elasticsearch.search.builder.SearchSourceBuilder.fromXContent（SearchSourceBuilder.java:115）〜[elasticsearch-6.1.2.jar：6.1.2]

Answer 1

我现在以这种方式生成SearchSourceBuilder：

mkdir ~/Downloads/gcc-4.9-deb && cd ~/Downloads/gcc-4.9-deb

wget http://launchpadlibrarian.net/247707088/libmpfr4_3.1.4-1_amd64.deb
wget http://launchpadlibrarian.net/253728424/libasan1_4.9.3-13ubuntu2_amd64.deb
wget http://launchpadlibrarian.net/253728426/libgcc-4.9-dev_4.9.3-13ubuntu2_amd64.deb
wget http://launchpadlibrarian.net/253728314/gcc-4.9-base_4.9.3-13ubuntu2_amd64.deb
wget http://launchpadlibrarian.net/253728399/cpp-4.9_4.9.3-13ubuntu2_amd64.deb
wget http://launchpadlibrarian.net/253728404/gcc-4.9_4.9.3-13ubuntu2_amd64.deb
wget http://launchpadlibrarian.net/253728432/libstdc++-4.9-dev_4.9.3-13ubuntu2_amd64.deb
wget http://launchpadlibrarian.net/253728401/g++-4.9_4.9.3-13ubuntu2_amd64.deb

sudo dpkg -i gcc-4.9-base_4.9.3-13ubuntu2_amd64.deb
sudo dpkg -i libmpfr4_3.1.4-1_amd64.deb
sudo dpkg -i libasan1_4.9.3-13ubuntu2_amd64.deb
sudo dpkg -i libgcc-4.9-dev_4.9.3-13ubuntu2_amd64.deb
sudo dpkg -i cpp-4.9_4.9.3-13ubuntu2_amd64.deb
sudo dpkg -i gcc-4.9_4.9.3-13ubuntu2_amd64.deb
sudo dpkg -i libstdc++-4.9-dev_4.9.3-13ubuntu2_amd64.deb
sudo dpkg -i g++-4.9_4.9.3-13ubuntu2_amd64.deb

Answer 2

我也面临着同样的问题。我们已经从ES 1.4.4更新到ES 6.4.2，并且我使用了ES提供的Java High Level Rest Client在ES中进行创建/更新/删除操作。我找不到一种简单的方法，可以使用高级Rest Client将上一个ES版本中使用的查询JSON转换为适当的searchRequest。以下是我最终使用的内容。

import org.elasticsearch.client.Response;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.Request;

public static Response executeGetRequest(RestHighLevelClient client,
            String api, String body) throws Exception {

            Request request = new Request("GET", api);
            if(body != null && !body.isEmpty()) {
                request.setJsonEntity(body);
            }            
            Response response = client.getLowLevelClient()
                    .performRequest(request);
            if (response == null) {
                throw new Exception(
                        "Get request have failed");
            }
            return response;        
    }

Answer 3

在createParser方法中，将第一个参数NamedXContentRegistry.EMPTY替换为JsonXContent.jsonXContent

如何通过JSON将查询设置为Elasticsearch SearchRequest？

3 个答案: