elasticsearch java api 查询分片数

原创已于 2022-04-08 16:45:35 修改 · 2.1k 阅读

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于 2022-04-08 16:41:40 首次发布

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该代码片段展示了如何利用Elasticsearch的Java REST High Level Client从官方文档链接获取指定索引的分片数量。首先初始化客户端，然后创建GetSettingsRequest，设置索引名并请求特定的设置（index.number_of_shards）。接着通过调用indices().getSettings()获取响应，从中解析出分片数，并确保客户端关闭。

官网地址：
https://www.elastic.co/guide/en/elasticsearch/client/java-rest/6.7/java-rest-high-get-settings.html

//获取shards
	override lazy val numberOfShards : Int = {
		LoggerUtils logInfo ("获取（shards）===============" )
		val client = ESUtils.getRestHighLevelClient(elasticsearchHost, elasticsearchPort)
		val shards = ESUtils.getShards(elasticsearchIndex, client)
		ESUtils.closeESClient(client)
		shards
	}

object ESUtils{
//获取shards
	def getShards(indexName: String, client: RestHighLevelClient): Int={
		val request = new GetSettingsRequest().indices(indexName)
		request.names("index.number_of_shards")
		val response = client.indices().getSettings(request, RequestOptions.DEFAULT)
		val shardsString = response.getSetting(indexName, "index.number_of_shards")
		client.close()
		val shards = shardsString.toInt
		shards
	}
}