如何在elasticsearch中使用java客户端发出原始查询？

我在上找到了一篇关于如何从ElasticSearch获取随机记录的帖子

我已将此文件存储为资源，并按如下方式加载它

String query = ResourceUtil.getResource("path/to/json/query");
SearchRequestBuilder srb = getSafeClient()
    .prepareSearch("myindex")
    .setTypes("mytype")
    .setQuery(query);
_logger.debug("search = {}", srb.toString());

search = {,
  "query": 
    "function_score": {
      "query": {
        "match_all": {}
      },
      "random_score": {}
    }
}

QueryParsingException[[myindex] [_na] query malformed, must start with start_object

然而，我总是遇到解析失败。当我记录SearchRequestBuilder时，我注意到一个逗号的前缀如下所示

String query = ResourceUtil.getResource("path/to/json/query");
SearchRequestBuilder srb = getSafeClient()
    .prepareSearch("myindex")
    .setTypes("mytype")
    .setQuery(query);
_logger.debug("search = {}", srb.toString());

search = {,
  "query": 
    "function_score": {
      "query": {
        "match_all": {}
      },
      "random_score": {}
    }
}

QueryParsingException[[myindex] [_na] query malformed, must start with start_object

我看到的QueryParsingException如下所示

String query = ResourceUtil.getResource("path/to/json/query");
SearchRequestBuilder srb = getSafeClient()
    .prepareSearch("myindex")
    .setTypes("mytype")
    .setQuery(query);
_logger.debug("search = {}", srb.toString());

search = {,
  "query": 
    "function_score": {
      "query": {
        "match_all": {}
      },
      "random_score": {}
    }
}

QueryParsingException[[myindex] [_na] query malformed, must start with start_object

---

你知道我做错了什么吗？是否可以纯粹使用Java客户端API来表示随机查询？我正在使用ElasticSearch v1.1。

不过，我修改并找到了如何以编程方式表达查询。如果有人感兴趣，代码片段如下

FunctionScoreQueryBuilder fsqb = new FunctionScoreQueryBuilder(QueryBuilders.matchAllQuery());
fsqb.add(ScoreFunctionBuilders.randomFunction((new Date()).getTime()));
SearchRequestBuilder srb = getSafeClient()
 .prepareSearch("myindex")
 .setTypes("mytype")
 .setQuery(fsqb);