125 lines
4.2 KiB
C#
125 lines
4.2 KiB
C#
using Microsoft.Extensions.Caching.Memory;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace CrasyStudio.Core.Common
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{
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public class CacheManager
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{
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public static CacheManager Default = new CacheManager();
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private IMemoryCache _cache = new MemoryCache(new MemoryCacheOptions());
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/// <summary>
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/// 取得缓存数据
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/// </summary>
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/// <typeparam name="T">类型值</typeparam>
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/// <param name="key">关键字</param>
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/// <returns></returns>
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public T Get<T>(string key)
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{
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if (string.IsNullOrWhiteSpace(key))
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throw new ArgumentNullException(nameof(key));
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T value;
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_cache.TryGetValue<T>(key, out value);
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return value;
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}
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/// <summary>
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/// 设置缓存(永不过期)
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/// </summary>
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/// <param name="key">关键字</param>
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/// <param name="value">缓存值</param>
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public void Set_NotExpire<T>(string key, T value)
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{
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if (string.IsNullOrWhiteSpace(key))
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throw new ArgumentNullException(nameof(key));
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T v;
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if (_cache.TryGetValue(key, out v))
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_cache.Remove(key);
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_cache.Set(key, value);
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}
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/// <summary>
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/// 设置缓存(滑动过期:超过一段时间不访问就会过期,一直访问就一直不过期)
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/// </summary>
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/// <param name="key">关键字</param>
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/// <param name="value">缓存值</param>
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public void Set_SlidingExpire<T>(string key, T value, TimeSpan span)
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{
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if (string.IsNullOrWhiteSpace(key))
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throw new ArgumentNullException(nameof(key));
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T v;
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if (_cache.TryGetValue(key, out v))
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_cache.Remove(key);
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_cache.Set(key, value, new MemoryCacheEntryOptions()
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{
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SlidingExpiration = span
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});
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}
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/// <summary>
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/// 设置缓存(绝对时间过期:从缓存开始持续指定的时间段后就过期,无论有没有持续的访问)
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/// </summary>
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/// <param name="key">关键字</param>
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/// <param name="value">缓存值</param>
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public void Set_AbsoluteExpire<T>(string key, T value, TimeSpan span)
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{
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if (string.IsNullOrWhiteSpace(key))
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throw new ArgumentNullException(nameof(key));
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T v;
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if (_cache.TryGetValue(key, out v))
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_cache.Remove(key);
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_cache.Set(key, value, span);
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}
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/// <summary>
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/// 设置缓存(绝对时间过期+滑动过期:比如滑动过期设置半小时,绝对过期时间设置2个小时，那么缓存开始后只要半小时内没有访问就会立马过期,如果半小时内有访问就会向后顺延半小时，但最多只能缓存2个小时)
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/// </summary>
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/// <param name="key">关键字</param>
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/// <param name="value">缓存值</param>
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public void Set_SlidingAndAbsoluteExpire<T>(string key, T value, TimeSpan slidingSpan, TimeSpan absoluteSpan)
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{
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if (string.IsNullOrWhiteSpace(key))
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throw new ArgumentNullException(nameof(key));
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T v;
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if (_cache.TryGetValue(key, out v))
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_cache.Remove(key);
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_cache.Set(key, value, new MemoryCacheEntryOptions()
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{
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SlidingExpiration = slidingSpan,
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AbsoluteExpiration = DateTimeOffset.Now.AddMilliseconds(absoluteSpan.TotalMilliseconds)
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});
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}
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/// <summary>
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/// 移除缓存
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/// </summary>
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/// <param name="key">关键字</param>
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public void Remove(string key)
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{
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if (string.IsNullOrWhiteSpace(key))
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throw new ArgumentNullException(nameof(key));
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_cache.Remove(key);
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}
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/// <summary>
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/// 释放
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/// </summary>
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public void Dispose()
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{
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if (_cache != null)
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_cache.Dispose();
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GC.SuppressFinalize(this);
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}
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}
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}
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