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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Globalization;
using Aspire.Hosting.ApplicationModel;
using Aspire.Hosting.Garnet;
using Aspire.Hosting.Utils;
using Microsoft.Extensions.DependencyInjection;
namespace Aspire.Hosting;
/// <summary>
/// Provides extension methods for adding Garnet resources to the application model.
/// </summary>
public static class GarnetBuilderExtensions
{
private const string GarnetContainerDataDirectory = "/data";
/// <summary>
/// Adds a Garnet container to the application model.
/// </summary>
/// <example>
/// Use in application host
/// <code lang="csharp">
/// var builder = DistributedApplication.CreateBuilder(args);
///
/// var garnet = builder.AddGarnet("garnet");
/// var api = builder.AddProject<Projects.Api>("api)
/// .WithReference(garnet);
///
/// builder.Build().Run();
/// </code>
/// </example>
/// <example>
/// Use in Api with Aspire.StackExchange.Redis
/// <code lang="csharp">
/// var builder = WebApplication.CreateBuilder(args);
/// builder.AddRedisClient("garnet");
///
/// var multiplexer = builder.Services.BuildServiceProvider()
/// .GetRequiredService<IConnectionMultiplexer>();
///
/// var db = multiplexer.GetDatabase();
/// db.HashSet("key", [new HashEntry("hash", "value")]);
/// var value = db.HashGet("key", "hash");
/// </code>
/// </example>
/// <param name="builder">The <see cref="IDistributedApplicationBuilder"/>.</param>
/// <param name="name">The name of the resource. This name will be used as the connection string name when referenced in a dependency.</param>
/// <param name="port">The host port to bind the underlying container to.</param>
/// <returns>A reference to the <see cref="IResourceBuilder{T}"/>.</returns>
public static IResourceBuilder<GarnetResource> AddGarnet(this IDistributedApplicationBuilder builder, string name,
int? port = null)
{
ArgumentNullException.ThrowIfNull(builder);
ArgumentNullException.ThrowIfNull(name);
var garnet = new GarnetResource(name);
string? connectionString = null;
builder.Eventing.Subscribe<ConnectionStringAvailableEvent>(garnet, async (@event, ct) =>
{
connectionString = await garnet.ConnectionStringExpression.GetValueAsync(ct).ConfigureAwait(false);
if (connectionString == null)
{
throw new DistributedApplicationException($"ConnectionStringAvailableEvent was published for the '{garnet.Name}' resource but the connection string was null.");
}
});
var healthCheckKey = $"{name}_check";
builder.Services.AddHealthChecks().AddRedis(sp => connectionString ?? throw new InvalidOperationException("Connection string is unavailable"), name: healthCheckKey);
return builder.AddResource(garnet)
.WithEndpoint(port: port, targetPort: 6379, name: GarnetResource.PrimaryEndpointName)
.WithImage(GarnetContainerImageTags.Image, GarnetContainerImageTags.Tag)
.WithImageRegistry(GarnetContainerImageTags.Registry)
.WithHealthCheck(healthCheckKey);
}
/// <summary>
/// Adds a named volume for the data folder to a Garnet container resource and enables Garnet persistence.
/// </summary>
/// <example>
/// Use <see cref="WithPersistence(IResourceBuilder{GarnetResource}, TimeSpan?)"/> to adjust Garnet persistence configuration, e.g.:
/// <code lang="csharp">
/// var cache = builder.AddGarnet("cache")
/// .WithDataVolume()
/// .WithPersistence(TimeSpan.FromSeconds(10));
/// </code>
/// </example>
/// <param name="builder">The resource builder.</param>
/// <param name="name">The name of the volume. Defaults to an auto-generated name based on the application and resource names.</param>
/// <param name="isReadOnly">
/// A flag that indicates if this is a read-only volume. Setting this to <c>true</c> will disable Garnet persistence.<br/>
/// Defaults to <c>false</c>.
/// </param>
/// <returns>The <see cref="IResourceBuilder{T}"/>.</returns>
public static IResourceBuilder<GarnetResource> WithDataVolume(this IResourceBuilder<GarnetResource> builder,
string? name = null, bool isReadOnly = false)
{
ArgumentNullException.ThrowIfNull(builder);
builder.WithVolume(name ?? VolumeNameGenerator.CreateVolumeName(builder, "data"), GarnetContainerDataDirectory,
isReadOnly);
if (!isReadOnly)
{
builder.WithPersistence();
}
return builder;
}
/// <summary>
/// Adds a bind mount for the data folder to a Garnet container resource and enables Garnet persistence.
/// </summary>
/// <example>
/// Use <see cref="WithPersistence(IResourceBuilder{GarnetResource}, TimeSpan?)"/> to adjust Garnet persistence configuration, e.g.:
/// <code lang="csharp">
/// var garnet = builder.AddGarnet("garnet")
/// .WithDataBindMount("mydata")
/// .WithPersistence(TimeSpan.FromSeconds(10));
/// </code>
/// </example>
/// <param name="builder">The resource builder.</param>
/// <param name="source">The source directory on the host to mount into the container.</param>
/// <param name="isReadOnly">
/// A flag that indicates if this is a read-only mount. Setting this to <c>true</c> will disable Garnet persistence.<br/>
/// Defaults to <c>false</c>.
/// </param>
/// <returns>The <see cref="IResourceBuilder{T}"/>.</returns>
public static IResourceBuilder<GarnetResource> WithDataBindMount(this IResourceBuilder<GarnetResource> builder,
string source, bool isReadOnly = false)
{
ArgumentNullException.ThrowIfNull(builder);
ArgumentNullException.ThrowIfNull(source);
builder.WithBindMount(source, GarnetContainerDataDirectory, isReadOnly);
if (!isReadOnly)
{
builder.WithPersistence();
}
return builder;
}
/// <summary>
/// Configures a Garnet container resource for persistence.
/// </summary>
/// <example>
/// Use with <see cref="WithDataBindMount(IResourceBuilder{GarnetResource}, string, bool)"/>
/// or <see cref="WithDataVolume(IResourceBuilder{GarnetResource}, string?, bool)"/> to persist Garnet data across sessions with custom persistence configuration, e.g.:
/// <code lang="csharp">
/// var cache = builder.AddGarnet("cache")
/// .WithDataVolume()
/// .WithPersistence(TimeSpan.FromSeconds(10));
/// </code>
/// </example>
/// <param name="builder">The resource builder.</param>
/// <param name="interval">The interval between snapshot exports. Defaults to 60 seconds.</param>
/// <param name="keysChangedThreshold">The number of key change operations required to trigger a snapshot at the interval. Defaults to 1.</param>
/// <returns>The <see cref="IResourceBuilder{T}"/>.</returns>
[Obsolete("This method is obsolete and will be removed in a future version. Use the overload without the keysChangedThreshold parameter.")]
public static IResourceBuilder<GarnetResource> WithPersistence(this IResourceBuilder<GarnetResource> builder,
TimeSpan? interval, long keysChangedThreshold)
=> WithPersistence(builder, interval);
/// <summary>
/// Configures a Garnet container resource for persistence.
/// </summary>
/// <example>
/// Use with <see cref="WithDataBindMount(IResourceBuilder{GarnetResource}, string, bool)"/>
/// or <see cref="WithDataVolume(IResourceBuilder{GarnetResource}, string?, bool)"/> to persist Garnet data across sessions with custom persistence configuration, e.g.:
/// <code lang="csharp">
/// var cache = builder.AddGarnet("cache")
/// .WithDataVolume()
/// .WithPersistence(TimeSpan.FromSeconds(10));
/// </code>
/// </example>
/// <param name="builder">The resource builder.</param>
/// <param name="interval">The interval between snapshot exports. Defaults to 60 seconds.</param>
/// <returns>The <see cref="IResourceBuilder{T}"/>.</returns>
public static IResourceBuilder<GarnetResource> WithPersistence(this IResourceBuilder<GarnetResource> builder,
TimeSpan? interval = null)
{
ArgumentNullException.ThrowIfNull(builder);
return builder.WithAnnotation(new CommandLineArgsCallbackAnnotation(context =>
{
context.Args.Add("--checkpointdir");
context.Args.Add("/data/checkpoints");
context.Args.Add("--recover");
context.Args.Add("--aof");
context.Args.Add("--aof-commit-freq");
context.Args.Add((interval ?? TimeSpan.FromSeconds(60)).TotalMilliseconds.ToString(CultureInfo.InvariantCulture));
return Task.CompletedTask;
}), ResourceAnnotationMutationBehavior.Replace);
}
}
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