dependency-injection - 使用 RavenDB 设置 dotnet 核心

Question

我目前在为多个环境设置带有 dotnet 核心的 RavenDB 时遇到问题。

在 StartUp 类中，我将 Raven 配置为 Singleton 并使用 IOptions 模式将设置 Raven 绑定(bind)到 RavenSettings 对象。

 public virtual void ConfigureServices(IServiceCollection services)
 {
     Services.AddMvc()

     //Add functionality to inject IOptions<T> 
     services.AddOptions();

     // App Settings
     services.Configure<RavenSettings>(Configuration.GetSection("Raven"));
     //services.Configure<RavenSettings>(settings => Configuration.GetSection("Raven").Bind(settings));

     // .NET core built in IOC
     services.AddSingleton(DocumentStoreHolder.Store);
     services.AddSingleton<IConfiguration>(Configuration);
 }

这是我的默认应用设置。

{
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Debug",
      "System": "Information",
      "Microsoft": "Information"
      }
  },
  "Raven": {
    "Url": "x",
    "DefaultDatabase": "x"
  }
}

这是我尝试将设置从 appsettings 绑定(bind)到...的类

public class RavenSettings
{
    public string Url { get; set; }
    public string DefaultDatabase { get; set; }
}

下面的类在生成 Raven 文档存储时遵循 Raven 文档。因为我使用的是单例，所以我没有点击构造函数来注入(inject)设置。任何人都可以建议解决这个问题吗？

public sealed class DocumentStoreHolder
{
    private static RavenSettings _ravenSettings;

    public DocumentStoreHolder(IOptions<RavenSettings> ravenSettings)
    {
        _ravenSettings = ravenSettings.Value;
    }

    public static IDocumentStore Store => DocStore.Value;

    private static readonly Lazy<IDocumentStore> DocStore = new Lazy<IDocumentStore>(CreateStore);

    private static IDocumentStore CreateStore()
    {
        var store = new DocumentStore
        {
            Url = _ravenSettings.Url,
            DefaultDatabase = _ravenSettings.DefaultDatabase
        }.Initialize();

        return store;
    }
}

Answer 1

基于 Set 的回答，我能够通过创建 IDocumentStoreHolder 接口(interface)并在 IOC 中注册它来解决它。

DocumentStoreHolder.cs

public class DocumentStoreHolder : IDocumentStoreHolder
{
    public DocumentStoreHolder(IOptions<RavenSettings> ravenSettings)
    {
        var settings = ravenSettings.Value;

        Store = new DocumentStore
        {
            Url = settings.Url,
            DefaultDatabase = settings.DefaultDatabase
        }.Initialize();
    }

    public IDocumentStore Store { get; }
}

IDocumentStoreHolder.cs

public interface IDocumentStoreHolder
{
    IDocumentStore Store { get; }
}

Startup.cs(配置服务)

services.AddSingleton<IDocumentStoreHolder, DocumentStoreHolder>();

SomeClass.cs

private readonly IDocumentStore _store;

public SomeClass(IDocumentStoreHolder documentStoreHolder)
{
    _store = documentStoreHolder.Store;
}