Question

我正在使用scala（2.12）通过高级Java rest客户端（6.5）查询Elasticsearch（6.5）。

libraryDependencies += "org.elasticsearch" % "elasticsearch" % "6.5.4"

libraryDependencies += "org.elasticsearch.client" % "elasticsearch-rest-high-level-client" % "6.5.4"

基本查询（matchQuery）和滚动对我来说效果很好。

val credentialsProvider = new BasicCredentialsProvider
    credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials("user", "password"))

val builder = RestClient.builder(new HttpHost("host", port, "https"))

builder.setHttpClientConfigCallback(new HttpClientConfigCallback() {
      override def customizeHttpClient(httpClientBuilder: HttpAsyncClientBuilder): HttpAsyncClientBuilder = httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider)
})

var client = new RestHighLevelClient(builder)

val scroll = new Scroll(TimeValue.timeValueMinutes(1L))

// Index
val searchRequest = new SearchRequest("index")

val searchSourceBuilder = new SearchSourceBuilder()

searchSourceBuilder.query(QueryBuilders.matchQuery("name.field", "value"))

searchSourceBuilder.size(500)

searchRequest.source(searchSourceBuilder)

searchRequest.scroll(scroll)
var searchResponse = client.search(searchRequest, RequestOptions.DEFAULT)
var scrollId = searchResponse.getScrollId
var searchHits = searchResponse.getHits().getHits

while (searchHits != null && searchHits.length > 0) {
      val scrollRequest = new SearchScrollRequest(scrollId)
      scrollRequest.scroll(scroll)
      searchResponse = client.scroll(scrollRequest, RequestOptions.DEFAULT)
      println(searchResponse.getHits.getHits.toList)
      scrollId = searchResponse.getScrollId
      searchHits = searchResponse.getHits.getHits

}

基本上上述查询对所有返回的数据均按预期工作。

现在，我的情况是我需要正则表达式（而不是mathQuery）。

所以我只更改了这一行；但它现在什么也没拿。

searchSourceBuilder.query(QueryBuilders.regexpQuery("name.field", "value"))

我在这里想念什么？如何使用Regexp？

使用高级Rest Java客户端的Scala elasticsearch：regexp和滚动

0 个答案: