IEvangelist.Azure.CosmosRepository 2.1.4

Azure Cosmos DB Repository .NET SDK

This package wraps the NuGet: Microsoft.Azure.Cosmos package, exposing a simple dependency-injection enabled IRepository{T} interface.

The repository is responsible for all of the create, read, update, and delete (CRUD) operations on objects where T : Item. The Item type adds several properties, one which is a globally unique identifier defined as:

[JsonProperty("id")]
public string Id { get; set; } = Guid.NewGuid().ToString();

Additionally, a type property exists which indicates the subclass name (this is used for filtering implicitly on your behalf):

[JsonProperty("type")]
public string Type { get; set; }

Finally, a partition key property is used internally to manage partitioning on your behalf. This can optionally be overridden on an item per item basis.

📣 Azure Cosmos DB - Official Blog

Getting started

1. Create an Azure Cosmos DB SQL resource.

2. Obtain the resource connection string from the Keys blade, be sure to get a connection string and not the key - these are different. The connection string is a compound key and endpoint URL.

3. Call AddCosmosRepository:

   public void ConfigureServices(IServiceCollection services)
   {
       services.AddCosmosRepository();
   }
   

   The optional setupAction allows consumers to manually configure the RepositoryOptions object:

   public void ConfigureServices(IServiceCollection services)
   {
       services.AddCosmosRepository(
           options =>
           {
               options.CosmosConnectionString = "< connection string >";
               options.ContainerId = "data-store";
               options.DatabaseId = "samples";
           });
   }
   

4. Define your object graph, objects must inherit Item, for example:

   using Microsoft.Azure.CosmosRepository;
   
   public class Person : Item
   {
       public string FirstName { get; set; }
       public string LastName { get; set; }
   }
   

5. Ask for an instance of IRepository<TItem>, in this case the TItem is Person:

   using Microsoft.Azure.CosmosRepository;
   
   public class Consumer
   {
       readonly IRepository<Person> _repository;
   
       public Consumer(IRepository<Person> repository) =>
           _repository = repository;
   
       // Use the repo...
   }
   

6. Perform any of the operations on the _repository instance, create Person records, update them, read them, or delete.

7. Enjoy!

Samples

Visit the Microsoft.Azure.CosmosRepository.Samples directory for samples on how to use the library with:

• Azure Functions
• Services
• Controllers (web apps)