Azure Cache In ASP.NET Core 2.0

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Azure Cache In ASP.NET Core 2.0

In this article, we will learn how to use Azure Redis cache in ASP.NET Core.

Solution

Create a class library and add the following NuGet packages.

StackExchange.Redis
Newtonsoft.json

Add a class to encapsulate the settings.

public AzureCacheSettings(string connectionString)
{
if (string.IsNullOrEmpty(connectionString))
throw new ArgumentNullException("ConnectionString");
this.ConnectionString = connectionString;
}
public string ConnectionString { get; }
}

Add a class for cache storage. Add a constructor and private methods to initialize the Azure client.

public AzureCacheStorage(AzureCacheSettings settings)
{
this.settings = settings;
Init();
}
private AzureCacheSettings settings;
private ConnectionMultiplexer connection;
private IDatabase database;
private IServer server;
private void Init()
{
connection = ConnectionMultiplexer.Connect(settings.ConnectionString);
database = connection.GetDatabase();
server = connection.GetServer(connection.GetEndPoints().First());
}

Now, add methods to access the cache.

public async Task SetStringAsync(string key, string value)
{
await database.StringSetAsync(key, value);
}
public async Task SetObjectAsync(string key, object value)
{
await database.StringSetAsync(key, JsonConvert.SerializeObject(value));
}
public async Task<string> GetStringAsync(string key)
{
var value = await database.StringGetAsync(key);
return value.IsNullOrEmpty ? "" : value.ToString();
}
public async Task<T> GetObjectAsync<T>(string key)
{
var value = await database.StringGetAsync(key);
return value.IsNullOrEmpty ?
ult(T) : JsonConvert.DeserializeObject<T>(value);
}
public async Task<bool> ExistAsync(string key)
{
return await database.KeyExistsAsync(key);
}
public async Task DeleteAsync(string key)
{
await database.KeyDeleteAsync(key);
}

Inject and use the class.

In ASP.NET Core web application, configure the services.

public void ConfigureServices(
IServiceCollection services)
{
services.AddScoped<IAzureCacheStorage>(factory =>
{
return new AzureCacheStorage(new AzureCacheSettings(
connectionString: Configuration["Cache_ConnectionString"]));
});
services.AddMvc();
}

Discussion

The sample code will require you to setup Azure account and Redis cache. Instructions for these can be found here.

Source Code