Redis Output Caching client integration

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To get started with the Redis output caching integration, install the 📦 Aspire.StackExchange.Redis.OutputCaching NuGet package:

dotnet add package Aspire.StackExchange.Redis.OutputCaching

#:package Aspire.StackExchange.Redis.OutputCaching@*

<PackageReference Include="Aspire.StackExchange.Redis.OutputCaching" Version="*" />

Add output caching

In the Program.cs file of your client-consuming project, call the AddRedisOutputCache extension method to register the required services for output caching:

builder.AddRedisOutputCache(connectionName: "cache");

Add the middleware to the request processing pipeline by calling UseOutputCache:

var app = builder.Build();

app.UseOutputCache();

For minimal API apps, configure an endpoint to do caching by calling CacheOutput, or by applying the OutputCacheAttribute:

app.MapGet("/cached", () => "Hello world!")
   .CacheOutput();

app.MapGet(
    "/attribute",
    [OutputCache] () => "Hello world!");

For apps with controllers, apply the [OutputCache] attribute to the action method. For Razor Pages apps, apply the attribute to the Razor page class.

Configuration

Use a connection string

When using a connection string from the ConnectionStrings configuration section:

builder.AddRedisOutputCache(connectionName: "cache");

Then the connection string will be retrieved:

{
  "ConnectionStrings": {
    "cache": "localhost:6379"
  }
}

Use configuration providers

The Redis output caching integration supports Microsoft.Extensions.Configuration. Example appsettings.json:

{
  "Aspire": {
    "StackExchange": {
      "Redis": {
        "OutputCaching": {
          "ConnectionString": "localhost:6379",
          "DisableHealthChecks": false,
          "DisableTracing": false
        }
      }
    }
  }
}

Use inline delegates

You can pass the delegate to set up options inline:

builder.AddRedisOutputCache(
    "cache",
    static settings => settings.DisableHealthChecks = true);

You can also configure the ConfigurationOptions:

builder.AddRedisOutputCache(
    "cache",
    configureOptions: options => options.ConnectTimeout = 3000);

Client integration health checks

By default, Aspire integrations enable health checks. The Redis output caching integration adds a health check that verifies the Redis instance is reachable.

Observability and telemetry

Logging

The Redis output caching integration uses standard .NET logging.

Tracing

The integration emits tracing activities using OpenTelemetry.

Metrics

The integration emits metrics using OpenTelemetry.