Redis

This connector simplifies accessing Redis databases. It supports the following .NET drivers:

• StackExchange.Redis, which provides an IConnectionMultiplexer.
• Microsoft.Extensions.Caching.StackExchangeRedis, which provides an IDistributedCache.

The remainder of this page assumes you're familiar with the basic concepts of Steeltoe Connectors.

Usage

To use this connector:

1. Create a Redis server instance or use a docker container.
2. Add NuGet references to your project.
3. Configure your connection string in appsettings.json.
4. Initialize the Steeltoe Connector at startup.
5. Use the driver-specific connection/client instance.

Add NuGet References

To use this connector, add a NuGet reference to Steeltoe.Connectors.

Also add a NuGet reference to one of the .NET drivers listed above, as you would if you were not using Steeltoe.

Configure connection string

The available connection string parameters for Redis are documented here.

The following example appsettings.json uses the docker container from above:

{
  "Steeltoe": {
    "Client": {
      "Redis": {
        "Default": {
          "ConnectionString": "localhost"
        }
      }
    }
  }
}

Initialize Steeltoe Connector

Update your Program.cs as below to initialize the Connector:

using Steeltoe.Connectors.Redis;

var builder = WebApplication.CreateBuilder(args);
builder.AddRedis();

Use IConnectionMultiplexer

To obtain an IConnectionMultiplexer instance in your application, inject the Steeltoe factory in a controller or view:

using Microsoft.AspNetCore.Mvc;
using StackExchange.Redis;
using Steeltoe.Connectors;
using Steeltoe.Connectors.Redis;

public class HomeController : Controller
{
    public async Task<IActionResult> Index(
        [FromServices] ConnectorFactory<RedisOptions, IConnectionMultiplexer> connectorFactory)
    {
        var connector = connectorFactory.Get();
        IConnectionMultiplexer client = connector.GetConnection();

        IDatabase database = client.GetDatabase();
        database.StringSet("myKey", DateTime.UtcNow.ToString());

        ViewData["Result"] = database.StringGet("myKey");
        return View();
    }
}

A complete sample app that uses IConnectionMultiplexer is provided at https://github.com/SteeltoeOSS/Samples/tree/main/Connectors/src/Redis.

Use IDistributedCache

To obtain an IDistributedCache instance in your application, inject the Steeltoe factory in a controller or view:

using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Caching.Distributed;
using Steeltoe.Connectors;
using Steeltoe.Connectors.Redis;

public class HomeController : Controller
{
    public async Task<IActionResult> Index(
        [FromServices] ConnectorFactory<RedisOptions, IDistributedCache> connectorFactory)
    {
        var connector = connectorFactory.Get();
        IDistributedCache client = connector.GetConnection();

        await client.SetStringAsync("myKey", DateTime.UtcNow.ToString());

        ViewData["Result"] = await client.GetStringAsync("myKey");
        return View();
    }
}

A complete sample app that uses IDistributedCache is provided at https://github.com/SteeltoeOSS/Samples/tree/main/Connectors/src/Redis.

Cloud Foundry

This Connector supports the following service brokers:

• Redis for VMware Tanzu Application Service
• VMware Tanzu Cloud Service Broker for Azure
• VMware Tanzu Cloud Service Broker for GCP

You can create and bind an instance to your application by using the Cloud Foundry CLI:

# Create Redis service
cf create-service p-redis shared-vm myRedisService

# Bind service to your app
cf bind-service myApp myRedisService

# Restage the app to pick up change
cf restage myApp

Kubernetes

This Connector supports the Service Binding Specification for Kubernetes. It can be used through the Bitnami Services Toolkit.

For details on how to use this, see the instructions at https://github.com/SteeltoeOSS/Samples/tree/main/Connectors/src/Redis#running-on-tanzu-application-platform-tap.