使用 HybridCache 混合缓存库

混合缓存可以同时使用内存缓存和分布式缓存，它可以提高缓存的命中率，减少对分布式缓存的访问，从而提高性能。

• 当从缓存中获取数据时，它首先会从内存缓存中获取数据，如果内存缓存中没有数据，它会从分布式缓存中获取数据。
• 当向缓存中写入数据时，它会同时向内存缓存和分布式缓存中写入数据。

Service 1 ---->  HybridCache  ---->  MemoryCache  ---->  DistributedCache

https://learn.microsoft.com/zh-cn/azure/architecture/best-practices/caching

安装程序包

dotnet add package Microsoft.Extensions.Caching.Hybrid

配置服务

builder.Services.AddHybridCache();

使用服务

public class SomeService(HybridCache cache)
{
    private HybridCache _cache = cache;

    public async Task<string> GetSomeInfoAsync(string name, int id, CancellationToken token = default)
    {
        return await _cache.GetOrCreateAsync( $"{name}-{id}",async cancel => await GetDataFromTheSourceAsync(name, id, cancel),cancellationToken: token );
    }

    public async Task<string> GetDataFromTheSourceAsync(string name, int id, CancellationToken token)
    {
        string someInfo = $"someinfo-{name}-{id}";
        return someInfo;
    }
}

按标记移除缓存条目

public class SomeService(HybridCache cache)
{
    private HybridCache _cache = cache;

    public async Task<string> GetSomeInfoAsync(string name, int id, CancellationToken token = default)
    {
        var tags = new List<string> { "tag1", "tag2", "tag3" };
        var entryOptions = new HybridCacheEntryOptions
        {
            Expiration = TimeSpan.FromMinutes(1),
            LocalCacheExpiration = TimeSpan.FromMinutes(1)
        };
        return await _cache.GetOrCreateAsync(
            $"{name}-{id}", // Unique key to the cache entry
            async cancel => await GetDataFromTheSourceAsync(name, id, cancel),
            entryOptions,
            tags,
            cancellationToken: token
        );
    }
    
    public async Task<string> GetDataFromTheSourceAsync(string name, int id, CancellationToken token)
    {
        string someInfo = $"someinfo-{name}-{id}";
        return someInfo;
    }

    public async Task RemoveByTagAsync(string tag)
    {
        await _cache.RemoveByTagAsync(tag);
    }
}