using Microsoft.Extensions.Caching.Memory;
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using SqlSugar;
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Threading.Tasks;
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namespace DocumentServiceAPI.Core
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{
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public class SqlSugarMemoryCache : ICacheService
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{
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MemoryCacheHelper cache = new MemoryCacheHelper();
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public void Add<V>(string key, V value)
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{
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cache.Set(key, value);
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}
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public void Add<V>(string key, V value, int cacheDurationInSeconds)
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{
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cache.Set(key, value, cacheDurationInSeconds);
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}
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public bool ContainsKey<V>(string key)
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{
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return cache.Exists(key);
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}
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public V Get<V>(string key)
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{
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return cache.Get<V>(key);
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}
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public IEnumerable<string> GetAllKey<V>()
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{
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return cache.GetCacheKeys();
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}
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public V GetOrCreate<V>(string cacheKey, Func<V> create, int cacheDurationInSeconds = int.MaxValue)
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{
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if (cache.Exists(cacheKey))
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{
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return cache.Get<V>(cacheKey);
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}
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else
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{
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var result = create();
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cache.Set(cacheKey, result, cacheDurationInSeconds);
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return result;
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}
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}
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public void Remove<V>(string key)
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{
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cache.Remove(key);
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}
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}
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public class MemoryCacheHelper
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{
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private static readonly Microsoft.Extensions.Caching.Memory.MemoryCache Cache = new Microsoft.Extensions.Caching.Memory.MemoryCache(new MemoryCacheOptions());
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/// <summary>
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/// 验证缓存项是否存在
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/// </summary>
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/// <param name="key">缓存Key</param>
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/// <returns></returns>
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public bool Exists(string key)
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{
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if (key == null)
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throw new ArgumentNullException(nameof(key));
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return Cache.TryGetValue(key, out _);
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}
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/// <summary>
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/// 添加缓存
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/// </summary>
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/// <param name="key">缓存Key</param>
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/// <param name="value">缓存Value</param>
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/// <param name="expiresSliding">滑动过期时长（如果在过期时间内有操作，则以当前时间点延长过期时间）</param>
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/// <param name="expiressAbsoulte">绝对过期时长</param>
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/// <returns></returns>
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public bool Set(string key, object value, TimeSpan expiresSliding, TimeSpan expiressAbsoulte)
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{
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if (key == null)
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throw new ArgumentNullException(nameof(key));
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if (value == null)
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throw new ArgumentNullException(nameof(value));
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Cache.Set(key, value,
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new MemoryCacheEntryOptions().SetSlidingExpiration(expiresSliding)
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.SetAbsoluteExpiration(expiressAbsoulte));
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return Exists(key);
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}
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/// <summary>
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/// 添加缓存
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/// </summary>
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/// <param name="key">缓存Key</param>
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/// <param name="value">缓存Value</param>
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/// <param name="expiresIn">缓存时长</param>
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/// <param name="isSliding">是否滑动过期（如果在过期时间内有操作，则以当前时间点延长过期时间）</param>
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/// <returns></returns>
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public bool Set(string key, object value, TimeSpan expiresIn, bool isSliding = false)
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{
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if (key == null)
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throw new ArgumentNullException(nameof(key));
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if (value == null)
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throw new ArgumentNullException(nameof(value));
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Cache.Set(key, value,
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isSliding
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? new MemoryCacheEntryOptions().SetSlidingExpiration(expiresIn)
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: new MemoryCacheEntryOptions().SetAbsoluteExpiration(expiresIn));
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return Exists(key);
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}
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/// <summary>
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/// 添加缓存
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/// </summary>
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/// <param name="key">缓存Key</param>
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/// <param name="value">缓存Value</param>
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/// <returns></returns>
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public void Set(string key, object value)
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{
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Set(key, value, TimeSpan.FromDays(1));
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}
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/// <summary>
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/// 添加缓存
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/// </summary>
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/// <param name="key">缓存Key</param>
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/// <param name="value">缓存Value</param>
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/// <param name="ts"></param>
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/// <returns></returns>
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public void Set(string key, object value, TimeSpan ts)
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{
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Set(key, value, ts, false);
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}
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/// <summary>
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/// 添加缓存
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/// </summary>
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/// <param name="key">缓存Key</param>
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/// <param name="value">缓存Value</param>
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/// <param name="ts"></param>
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/// <returns></returns>
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public void Set(string key, object value, int seconds)
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{
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var ts = TimeSpan.FromSeconds(seconds);
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Set(key, value, ts, false);
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}
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/// <summary>
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/// 删除缓存
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/// </summary>
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/// <param name="key">缓存Key</param>
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/// <returns></returns>
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public void Remove(string key)
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{
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if (key == null)
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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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/// 批量删除缓存
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/// </summary>
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/// <returns></returns>
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public void RemoveAll(IEnumerable<string> keys)
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{
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if (keys == null)
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throw new ArgumentNullException(nameof(keys));
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keys.ToList().ForEach(item => Cache.Remove(item));
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}
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#region 获取缓存
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/// <summary>
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/// 获取缓存
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/// </summary>
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/// <param name="key">缓存Key</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 (key == null)
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throw new ArgumentNullException(nameof(key));
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return Cache.Get<T>(key);
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}
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/// <summary>
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/// 获取缓存
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/// </summary>
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/// <param name="key">缓存Key</param>
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/// <returns></returns>
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public object Get(string key)
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{
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if (key == null)
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throw new ArgumentNullException(nameof(key));
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return Cache.Get(key);
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}
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/// <summary>
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/// 获取缓存集合
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/// </summary>
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/// <param name="keys">缓存Key集合</param>
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/// <returns></returns>
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public IDictionary<string, object> GetAll(IEnumerable<string> keys)
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{
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if (keys == null)
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throw new ArgumentNullException(nameof(keys));
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var dict = new Dictionary<string, object>();
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keys.ToList().ForEach(item => dict.Add(item, Cache.Get(item)));
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return dict;
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}
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#endregion
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/// <summary>
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/// 删除所有缓存
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/// </summary>
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public void RemoveCacheAll()
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{
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var l = GetCacheKeys();
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foreach (var s in l)
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{
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Remove(s);
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}
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}
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/// <summary>
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/// 删除匹配到的缓存
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/// </summary>
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/// <param name="pattern"></param>
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/// <returns></returns>
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public void RemoveCacheRegex(string pattern)
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{
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IList<string> l = SearchCacheRegex(pattern);
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foreach (var s in l)
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{
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Remove(s);
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}
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}
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/// <summary>
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/// 搜索 匹配到的缓存
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/// </summary>
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/// <param name="pattern"></param>
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/// <returns></returns>
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public IList<string> SearchCacheRegex(string pattern)
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{
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var cacheKeys = GetCacheKeys();
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var l = cacheKeys.Where(k => Regex.IsMatch(k, pattern)).ToList();
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return l.AsReadOnly();
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}
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/// <summary>
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/// 获取所有缓存键
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/// </summary>
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/// <returns></returns>
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public List<string> GetCacheKeys()
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{
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const BindingFlags flags = BindingFlags.Instance | BindingFlags.NonPublic;
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var entries = Cache.GetType().GetField("_entries", flags).GetValue(Cache);
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var cacheItems = entries as IDictionary;
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var keys = new List<string>();
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if (cacheItems == null) return keys;
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foreach (DictionaryEntry cacheItem in cacheItems)
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{
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keys.Add(cacheItem.Key.ToString());
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}
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return keys;
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}
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}
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}
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