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Azure Redis Cache

This is an example of implementing an Azure Redis Cache in C#. It is written following the Clean Architecture, from my template from vanarkel/Clean-Architecture-Example and it is using the Microsoft.Extensions.Caching.Redis NuGet package.

Before writing the code, you have to create an Azure Redis Cache in the Azure Portal. It is handy that you save the connectionstring right now, as you'll use it later.

Implementation

In Program.cs or Startup.cs, where you register your services for the Presentation/UI layer. Here we use my code from joerivanarkel/.ConnectionString.md to hide the connection string in dotnet secrets.

builder.Services.AddDistributedRedisCache(option =>
{
    option.Configuration = DatabaseConnection<Program>.GetSecret("RedisConnection");
    option.InstanceName = "master";
});

In the Data Access class i try to get the list from the Redis Cache. Then i check if the result is null or empty by checking for the "[]" value. If not i deserialize the Json and return the list, using the Newtonsoft.Json NuGet package, but their are other possibilities.

If it is empty, i get the data from the Database. Then i cache the data by serializing the Data in Json format.

var cachedList = _cache.GetString("Model");
if ((cachedPersonList != "[]"))
{
	return JsonConvert.DeserializeObject<IEnumerable<Model>>(cachedList);
}
else
{
	"Get from Database"

 	_cache.SetString("Model", JsonConvert.SerializeObject(List));
	return personList;
}