Elasticsearch Java REST高级客户端删除索引-蒲公英云

Elasticsearch Java REST高级客户端删除索引

版本：Elasticsearch 7.2.0

1、索引是否存在

2、删除索引

3、创建客户端

4、maven配置—-pom

1、索引是否存在

/**
     * 索引是否存在
     * @param indexName
     * @return
     */
    public static boolean exists(String indexName) {
        RestHighLevelClient client = getClient();
        GetIndexRequest request = new GetIndexRequest(indexName); 
        request.local(false); 
        request.humanReadable(true); 
        request.includeDefaults(false); 
        try {
            return client.indices().exists(request, RequestOptions.DEFAULT);
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
    }

2、删除索引

/**
     * 删除索引
     */
    public static void deleteIndex() {
        String indexName = "alert_pinghost-min-2019-11-20";
        boolean exists = exists(indexName);
        if(!exists) {
            //不存在就结束
            return ;
        }
        //索引存在，就执行删除
        long s = System.currentTimeMillis();
        RestHighLevelClient client = getClient();
        DeleteIndexRequest request = new DeleteIndexRequest(indexName); 
        request.timeout(TimeValue.timeValueMinutes(2)); 
        request.timeout("2m");
        try {
            AcknowledgedResponse delete = client.indices().delete(request, RequestOptions.DEFAULT);
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                client.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        long t = System.currentTimeMillis();
        //计算删除耗时
        System.out.println(t-s);
    }