進樣MongDb與團結depencendy注射

Question

到目前爲止，我有我的存儲庫下面的代碼：

public MyRepo(ILog logger) 
{ 
    this.Logger = logger; 

    var mongoUrlBuilder = new MongoUrlBuilder(ConfigurationManager.ConnectionStrings["MyContext"].ConnectionString); 
    this.MongoClient = new MongoClient(mongoUrlBuilder.ToMongoUrl()); 
    this.MongoDatabase = this.MongoClient.GetDatabase("MyDB"); 
    this.UserCollection = this.MongoDatabase.GetCollection<MyModel>("pro"); 
} 

這就是我如何使用例如統一DI容器：

var container = new UnityContainer(); 

container.RegisterType<IMyModel, MyModel>(); 

RegisterTypes(container); 
return container; 

如何使用統一DI注入MongoDb？

我問的主要原因是因爲我想能夠模擬mongoDb並對其進行測試。這些要求要求我使用Unity DI和MongoDb。

UPDATE

最後，我去下面的百通。我加了Db的上下文類看起來像這樣：

public class MongoDbContext 
    { 
     public const string CONNECTION_STRING_NAME = "DBContext"; 
     public const string DATABASE_NAME = "MyDb"; 

     private static readonly IMongoClient Client; 
     private static readonly IMongoDatabase Database; 

     static MongoDbContext() 
     { 
      var connectionString = ConfigurationManager.ConnectionStrings[CONNECTION_STRING_NAME].ConnectionString; 
      Client = new MongoClient(connectionString); 
      Database = Client.GetDatabase(DATABASE_NAME); 
     } 

     public IMongoCollection<TEntity> GetCollection<TEntity>() 
     { 
      return Database.GetCollection<TEntity>(typeof(TEntity).Name.ToLower() + "s"); 
     } 
    } 

而且MongoRepository內使用它是這樣的：

 public class MyRepository<TModel> : IGenericMongoRepository<TModel> where TModel : BaseModel 
     { 
      private MongoDbContext MongoDbContext = null; 

      public Exception OperationException { get; set; } 
      private ILog Logger; 

      public MyRepository(ILog logger) 
      { 
       this.Logger = logger; 
       this.MongoDbContext = new MongoDbContext(); 
      } 
     public async Task<TModel> Add(TModel item)  
     { 
      try 
      { 
       IMongoCollection<TModel> collection = this.GetCollection<TModel>(); 
       await collection.InsertOneAsync(item); 
       return item; 
      } 
     catch (Exception e) 
     { 
     } 
    } 
} 

Answer 1

您可以重構回購採取蒙戈數據庫作爲一種可注射的依賴

private IMongoDatabase database; 
private ILog Logger; 
private IMongoCollection<MyModel> UserCollection; 

public MyRepo(ILog logger, IMongoDatabase database) { 
    this.Logger = logger; 
    this.database = database; 
    this.UserCollection = database.GetCollection<MyModel>("pro"); 
} 

則實例的創建可以被移動到該組合物根

//Create the database instance 
var mongoUrlBuilder = new MongoUrlBuilder(ConfigurationManager.ConnectionStrings["MyContext"].ConnectionString); 
var client = new MongoClient(mongoUrlBuilder.ToMongoUrl()); 
var database = client.GetDatabase("MyDB"); 

var container = new UnityContainer(); 
container.RegisterType<IMyModel, MyModel>(); 
// Register existing object instance 
container.RegisterInstance<IMongoDatabase>(database); 

RegisterTypes(container); 
return container;