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using Nop.Core.Configuration;
using Nop.Core.Infrastructure;
namespace Nop.Core.Caching;
/// <summary>
/// Represents a per request cache manager
/// </summary>
public partial class PerRequestCacheManager : CacheKeyService, IShortTermCacheManager
{
#region Fields
protected readonly ConcurrentTrie<object> _concurrentCollection;
#endregion
#region Ctor
public PerRequestCacheManager(AppSettings appSettings) : base(appSettings)
{
_concurrentCollection = new ConcurrentTrie<object>();
}
#endregion
#region Methods
/// <summary>
/// Get a cached item. If it's not in the cache yet, then load and cache it
/// </summary>
/// <typeparam name="T">Type of cached item</typeparam>
/// /// <param name="acquire">Function to load item if it's not in the cache yet</param>
/// <param name="cacheKey">Initial cache key</param>
/// <param name="cacheKeyParameters">Parameters to create cache key</param>
/// <returns>
/// A task that represents the asynchronous operation
/// The task result contains the cached value associated with the specified key
/// </returns>
public virtual async Task<T> GetAsync<T>(Func<Task<T>> acquire, CacheKey cacheKey, params object[] cacheKeyParameters)
{
var key = cacheKey.Create(CreateCacheKeyParameters, cacheKeyParameters).Key;
if (_concurrentCollection.TryGetValue(key, out var data))
return (T)data;
var result = await acquire();
if (result != null)
_concurrentCollection.Add(key, result);
return result;
}
/// <summary>
/// Remove items by cache key prefix
/// </summary>
/// <param name="prefix">Cache key prefix</param>
/// <param name="prefixParameters">Parameters to create cache key prefix</param>
public virtual void RemoveByPrefix(string prefix, params object[] prefixParameters)
{
var keyPrefix = PrepareKeyPrefix(prefix, prefixParameters);
_concurrentCollection.Prune(keyPrefix, out _);
}
/// <summary>
/// Remove the value with the specified key from the cache
/// </summary>
/// <param name="cacheKey">Cache key</param>
/// <param name="cacheKeyParameters">Parameters to create cache key</param>
public virtual void Remove(string cacheKey, params object[] cacheKeyParameters)
{
_concurrentCollection.Remove(PrepareKey(new CacheKey(cacheKey), cacheKeyParameters).Key);
}
#endregion
}