如何在Elasticsearch php客户端api中通过别名查找索引 - How to find Index by Alias in Elasticsearch php client api

How to find Index by Alias in Elasticsearch php client api

我正在创建搜索应用程序。当我重新索引数据到elasticsearch，不应该停机，而重新索引。我想让驯鹿零停机的过程。我正在尝试这样做:

查找带有别名的旧索引。创建新索引并填充新数据删除别名并删除旧索引给出新的索引别名

我不明白为什么人们会给他投反对票，问题很直接，而且弹性搜索的文档不容易遵循!

无论如何，这是解决方案:

class SomeClass
{
    /** @var 'Elasticsearch'Client */
    private $client;
    /**
     * @param 'Elasticsearch'Client $client
     */
    public function __construct('Elasticsearch'Client $client)
    {
        $this->client = $client;
    }
    /**
     * @param string $aliasName
     *
     * @return null|string
     */
    public function findIndexNameByAlias($aliasName)
    {
        $aliases = $this->client->indices()->getAliases();
        foreach ($aliases as $index => $aliasMapping) {
            if (array_key_exists($aliasName, $aliasMapping['aliases'])) {
                return $index;
            }
        }
        return null;
    }
}
$someClass = new SomeClass(new 'Elasticsearch'Client());
echo "Index associated with 'MyAlias': " . $someClass->findIndexNameByAlias('MyAlias');