138 lines
5.0 KiB
C#
138 lines
5.0 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.Runtime.Caching;
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using System.Text;
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using System.Collections.Concurrent;
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namespace Common
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{
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/// <summary>
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/// 基于MemoryCache的缓存辅助类
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/// </summary>
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public static class MemoryCacheHelper
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{
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private static readonly Object _locker = new object();
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public readonly static MemoryCache _cache = MemoryCache.Default;
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private static log4net.ILog logger = log4net.LogManager.GetLogger(typeof(MemoryCacheHelper));
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/// <summary>
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/// 缓存数据，默认2分钟后过期
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/// </summary>
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/// <param name="key"></param>
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/// <param name="value"></param>
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public static void Set(string key, object value)
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{
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if (value != null)
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{
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CacheItemPolicy policy = new CacheItemPolicy(); //创建缓存项策略
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policy.AbsoluteExpiration = new DateTimeOffset(DateTime.Now.AddMinutes(10)); //设定某个时间过后将逐出缓存
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Set(key, value, policy);
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}
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}
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public static void Delete(string key)
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{
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lock (_locker)
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{
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_cache.Remove(key);
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}
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}
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public static void SlideSet(string key, object value)
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{
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CacheItemPolicy policy = new CacheItemPolicy(); //创建缓存项策略
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policy.SlidingExpiration = new TimeSpan(0, 20, 0); //如果20分钟内使用，还使用这个数据
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Set(key, value, policy);
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}
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public static void SlideSet(string key, object value, TimeSpan span)
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{
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CacheItemPolicy policy = new CacheItemPolicy(); //创建缓存项策略
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policy.SlidingExpiration = span; //如果20分钟内使用，还使用这个数据
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Set(key, value, policy);
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}
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/// <summary>
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/// 缓存数据，指定过期时间
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/// </summary>
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/// <param name="key"></param>
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/// <param name="value"></param>
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/// <param name="expiration"></param>
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public static void Set(string key, object value, DateTimeOffset expiration)
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{
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CacheItemPolicy policy = new CacheItemPolicy();
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policy.AbsoluteExpiration = expiration;
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//policy.RemovedCallback = new CacheEntryRemovedCallback((arguments) =>
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//{
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// try
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// {
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// //第一版本的代码，先废弃掉
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// string KKK = arguments.CacheItem.Key;
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// if (KKK.StartsWith("UDPPackage_"))
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// {
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// object VVV = arguments.CacheItem.Value;
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// string ti = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
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// string nnn = Newtonsoft.Json.JsonConvert.SerializeObject(VVV);
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// UDPPackageCount t = (UDPPackageCount)VVV;
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// UDPPackage u = new UDPPackage();
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// u.CommandType = KKK;
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// u.TotalCount = t.Count;
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// u.RemoveTime = ti;
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// string mns = Newtonsoft.Json.JsonConvert.SerializeObject(u);
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// logger.Error(ti + ",UDP Package：" + KKK + "," + nnn);
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// CSRedisCacheHelper.redis3.Publish("redis-udppackage", mns);
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// }
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// }
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// catch (Exception ex)
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// {
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// logger.Info("数量统计error：" + ex.Message);
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// }
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//});
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Set(key, value, policy);
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}
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private static void Set(string key, object value, CacheItemPolicy policy)
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{
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if (value != null)
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{
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_cache.Set(key, value, policy);
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}
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}
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public static object Get(string key)
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{
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object result = _cache.Get(key);
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return result;
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}
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///// <summary>
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///// 获取缓存对象（主机的IP地址和端口），优先使用mac地址匹配
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///// </summary>
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///// <param name="key">主机编码</param>
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///// <param name="mac">mac地址</param>
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///// <returns></returns>
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//public static string Get(string key, string mac)
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//{
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// object result = _cache.Get(mac);
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// if (null == result)
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// {
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// result = _cache.Get(key);
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// }
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// return result == null ? "" : result.ToString();
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//}
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/// <summary>
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/// 判断主机是否在缓存里，优先使用mac地址匹配
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/// </summary>
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/// <param name="key">主机编码</param>
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/// <param name="mac">mac地址</param>
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/// <returns></returns>
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public static bool Contains(string key, string mac)
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{
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bool result = _cache.Contains(mac);
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if (!result)
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{
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return _cache.Contains(key);
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}
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return result;
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}
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}
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}
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