azure - 单例 Azure Cosmos DB 客户端

Question

Use a singleton Azure Cosmos DB client for the lifetime of your application

Each DocumentClient instance is thread-safe and performs efficient connection management and address caching when operating in Direct Mode. To allow efficient connection management and better performance by DocumentClient, it is recommended to use a single instance of DocumentClient per AppDomain for the lifetime of the application.

https://learn.microsoft.com/en-us/azure/cosmos-db/performance-tips

services.AddSingleton<IDocumentClient>(x => new DocumentClient(UriEndpoint, MasterKey));

private readonly IDocumentClient _documentClient;
public HomeController(IDocumentClient documentClient){
    _documentClient = documentClient;
}

这是否意味着客户端可以用于多个数据库(即任何数据库中的任何容器)？

How do you initialize DocumentDB client as a Singleton in a dotnet core application

Answer 1

正确。数据库和集合是每个文档特定操作的参数，这意味着您可以在多个数据库和集合中完全重用同一客户端。

请记住，这意味着您的数据库或集合之间没有安全隔离。单个主 key 可以访问单个 Azure Cosmos DB 资源中的所有内容。