Question

我正在尝试使用RestHighLevelClient为弹性创建动态模板。 getMapping()中带注释的代码段适用于有效的静态映射。但是，在尝试创建动态映射时遇到了问题。

我的意图是将任何以_id结尾的属性和任何以_message结尾的属性当作文本。

有人可以指出我在做什么错吗？

":{"root_cause":[{"type":"class_cast_exception","reason":"class_cast_exception: java.util.LinkedHashMap cannot be cast to java.util.List"}],"type":"mapper_parsing_exception","reason":"Failed to parse mapping [_doc]: java.util.LinkedHashMap cannot be cast to java.util.List","caused_by":{"type":"class_cast_exception","reason":"class_cast_exception: java.util.LinkedHashMap cannot be cast to java.util.List"}},"status":400}

我的代码段：

主要方法：

CreateIndexRequest request = new CreateIndexRequest(indexName);
    request.settings(Settings.builder()
            .put("index.number_of_shards", 3)
            .put("index.number_of_replicas", 2)
    );

request.mapping("_doc", getMapping());
CreateIndexResponse createIndexResponse = esClient.indices().create(request, RequestOptions.DEFAULT);

帮助方法：

private static XContentBuilder getMapping() throws IOException {

    XContentBuilder mappingBuilder = XContentFactory.jsonBuilder()
            .startObject()
                .startObject("_doc")
                    .startObject("dynamic_templates")
                            .startObject("id")
                                .field("match", "*_id")
                                .field("match_mapping_type", "long")
                            .endObject()
                            .startObject("message")
                                .field("match", "*_message")
                                .field("match_mapping_type", "string")
                            .endObject()
                    .endObject()
                .endObject()
            .endObject();

    /*XContentBuilder mappingBuilder = XContentFactory.jsonBuilder()
            .startObject()
                .startObject("_doc")
                    .startObject("properties")
                        .startObject("user")
                            .field("type", "text")
                            .field("index", true)
                        .endObject()
                        .startObject("message")
                            .field("type", "text")
                            .field("index", true)
                        .endObject()
                    .endObject()
                .endObject()
            .endObject();*/

    return mappingBuilder;
}

参考指南：https://www.elastic.co/guide/en/elasticsearch/guide/master/custom-dynamic-mapping.html

Answer 1

动态模板是数组。例如，Elasticsearch 7.1.0

private XContentBuilder buildDynamicTemplates() throws IOException {
    XContentBuilder dynamicTemplate = XContentFactory.jsonBuilder();
    dynamicTemplate.startObject();
    {
      dynamicTemplate = DynamicTemplateFactory.templateBuilder(dynamicTemplate);
    }
    dynamicTemplate.endObject();
    return dynamicTemplate;
  }

  private static XContentBuilder builderTemplate() throws IOException {
    XContentBuilder dynamicTemplate = XContentFactory.jsonBuilder();
    dynamicTemplate.startObject();
    dynamicTemplate.startArray("dynamic_templates");
    {
      dynamicTemplate.startObject();
      {
        dynamicTemplate.startObject("strings_as_keywords");
        {
          dynamicTemplate.field("match", "*");
          dynamicTemplate.field("match_mapping_type", "string");
          dynamicTemplate.startObject("mapping");
          {
            dynamicTemplate.field("type", "keyword");
          }
          dynamicTemplate.endObject();
        }
        dynamicTemplate.endObject();
      }
      dynamicTemplate.endObject();
    }
    dynamicTemplate.endArray();
    dynamicTemplate.endObject();
    return dynamicTemplate;
  }

ElasticSearch映射动态模板Java

1 个答案: