57 lines
2.1 KiB
C#
57 lines
2.1 KiB
C#
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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using HuanMeng.MiaoYu.Code.DataAccess;
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using HuanMeng.MiaoYu.Model.DbSqlServer.Db_MiaoYu;
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using Microsoft.Extensions.Caching.Memory;
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namespace HuanMeng.MiaoYu.Code.Cache
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{
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/// <summary>
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/// 人物信息缓存
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/// </summary>
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public class CharacterInfoBaseCache
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{
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private IMemoryCache _memoryCache;
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private object _cacheLock = new object(); // 用于线程安全的锁
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private const string CharactersCacheKey = "Characters";
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private DAO _dao;
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public CharacterInfoBaseCache(IMemoryCache memoryCache, DAO dao)
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{
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this._memoryCache = memoryCache;
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this._dao = dao;
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}
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public List<T_Character> GetCharacterFromCache(int userId)
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{
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lock (_cacheLock) // 加锁以防止并发访问
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{
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if (!_memoryCache.TryGetValue(CharactersCacheKey , out List<T_Character> cachedCharacter))
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{
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// 如果缓存中没有数据，则从数据库中获取
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//var db = new YourDbContext();
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var character = _dao.daoDbMiaoYu.context.T_Character.ToList();
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if (character != null && character.Count > 0)
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{
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// 将数据放入缓存
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var cacheEntryOptions = new MemoryCacheEntryOptions()
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.SetAbsoluteExpiration(TimeSpan.FromMinutes(30)) // 设置缓存过期时间
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.SetSlidingExpiration(TimeSpan.FromMinutes(5)); // 设置滑动过期时间
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_memoryCache.Set(CharactersCacheKey , character, cacheEntryOptions);
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cachedCharacter = character;
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}
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else
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{
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cachedCharacter = new List<T_Character>();
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}
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}
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return cachedCharacter;
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}
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}
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}
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}
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