如何在elasticsearch 6.2.1中找到索引？ [英] How to find index exists in elasticsearch 6.2.1?

问题描述

我曾试图检查弹性搜索的RestHighLevelClient中是否存在索引6.2.1

目前我正在使用以下代码

 尝试{
 
 OpenIndexRequest openIndexRequest = new OpenIndexRequest（indexName）; 
 client.indices（）。open（openIndexRequest，header）.isAcknowledged（）; 
 
} catch（ElasticsearchStatusException ex）{
 String m =Elasticsearch exception [type = index_not_found_exception，reason = no such index]; 
 
 if（m.equals（ex.getMessage（）））{
 // TODO如果索引不存在
} 
} 
  

它工作正常，但我想找到一些相关的方法，如

<$ 。p $ p> client.indices（）存在（INDEXNAME）;


弹性搜索6.2.1

任何帮助真的很感激。

解决方案

在高级REST客户端（可能从6.3开始）支持此功能之前，您可以通过使用低级REST客户端并发出 HEAD HTTP请求您的索引名称

 响应响应= restClient.performRequest（HEAD，/+ indexname）; 
 int statusCode = response.getStatusLine（）。getStatusCode（）; 
 if（statusCode == 404）{
 //索引不存在
}否则{
 //索引存在
} 
  

I had trying to check whether a index exists in the RestHighLevelClient of elasticsearch 6.2.1

presently I am using using following code

    try {

        OpenIndexRequest openIndexRequest = new OpenIndexRequest(indexName);
        client.indices().open(openIndexRequest, header).isAcknowledged();

    } catch (ElasticsearchStatusException ex) {
        String m = "Elasticsearch exception [type=index_not_found_exception, reason=no such index]";

        if (m.equals(ex.getMessage())) {
            //TODO In case index does not exists
        }
    }

it works fine but I want to find some relevant methods like

client.indices().exists(indexname);

elastic search 6.2.1

Any help is really appreciated.

解决方案

Until this is supported by the high-level REST client (probably as of 6.3), you can achieve this by using the low-level REST client and issuing a HEAD HTTP request to your index name

Response response = restClient.performRequest("HEAD", "/" + indexname); 
int statusCode = response.getStatusLine().getStatusCode(); 
if (statusCode == 404) {
   // index does not exist
} else {
   // index exists
}

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