说明：不是很理解并发和缓存逻辑的朋友，请务必自己敲一下代码，好好理解一下，，老司机不用多说了，，拿来就可以用。
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public static class customcache
{
private static list<concurrentdictionary<string, datamodel>> cachecontainer = null;
private static readonly int cpucount = environment.processorcount;//获取cpu个数
static customcache()
{
cachecontainer = new list<concurrentdictionary<string, datamodel>>();
for (int i = 0; i < cpucount; i++)
{
cachecontainer.add(new concurrentdictionary<string, datamodel>());
}
autoclaercache(900000);//每隔15分钟自动清理
}
/// <summary>
/// 自动清理缓存
/// </summary>
/// <param name=”intervaltime”>间隔时间 毫秒为单位</param>
private static void autoclaercache(int intervaltime)
{
task.factory.startnew(() =>
{
while (true)
{
thread.sleep(intervaltime);
for (int i = 0; i < cachecontainer.count; i++)
{
var cache = cachecontainer[i].where(w => w.value.lifecycletype == lifecycle.temp);
foreach (var item in cache)
{
if (datetime.now > item.value.expirationtime)
{
cachecontainer[i].tryremove(item.key, out datamodel datamodel);
}
}
}
}
});
}
/// <summary>
/// 添加缓存
/// </summary>
/// <param name=”key”>键</param>
/// <param name=”keyvalue”>键值</param>
public static void add(string key, object keyvalue)
{
if (existscachedata(key, out int i))
{
cachecontainer[i][key] = new datamodel { lifecycletype = lifecycle.lasting, cachedata = keyvalue };
}
else
{
cachecontainer[math.abs(key.gethashcode() % cpucount)].tryadd(key, new datamodel { lifecycletype = lifecycle.lasting, cachedata = keyvalue });
}
}
/// <summary>
/// 添加缓存
/// </summary>
/// <param name=”key”>键</param>
/// <param name=”keyvalue”>键值</param>
/// <param name=”timeout”>超时 分钟为单位</param>
public static void add(string key, object keyvalue, int timeout)
{
if (existscachedata(key, out int i))
{
cachecontainer[i][key] = new datamodel { lifecycletype = lifecycle.temp, expirationtime = datetime.now.addminutes(timeout), cachedata = keyvalue };
}
else
{
cachecontainer[math.abs(key.gethashcode() % cpucount)].tryadd(key, new datamodel { lifecycletype = lifecycle.temp, expirationtime = datetime.now.addminutes(timeout), cachedata = keyvalue });
}
}
/// <summary>
/// 删除缓存
/// </summary>
/// <param name=”key”>键</param>
public static void remove(string key)
{
cachecontainer[math.abs(key.gethashcode() % cpucount)].tryremove(key, out datamodel datamodel);
}
/// <summary>
/// 获取缓存数据
/// </summary>
/// <typeparam name=”t”></typeparam>
/// <param name=”key”>键</param>
/// <param name=”func”>委托</param>
/// <param name=”timeout”>超时时间 分钟为单位 默认为0 则 持久</param>
/// <returns></returns>
public static t getcachedata<t>(string key, func<t> func, int timeout = 10)
{
if (existscachedata(key, out int i))
{
var temp = cachecontainer[i][key];
bool flag = temp.cachedata.gettype() == typeof(t);//判断转换类型是否一致
if (flag)
{
return (t)temp.cachedata;
}
}
var data = func.invoke();
if (timeout > 0) add(key, data, timeout); else add(key, data);
return data;
}
/// <summary>
/// 检查缓存数据
/// </summary>
/// <param name=”key”>键</param>
/// <param name=”containerindex”>容器索引</param>
/// <returns></returns>
public static bool existscachedata(string key, out int containerindex)
{
containerindex = math.abs(key.gethashcode() % cpucount);
if (cachecontainer[containerindex].containskey(key))
{
var cache = cachecontainer[containerindex][key];
if (cache.lifecycletype == lifecycle.temp && datetime.now > cache.expirationtime)
{
cachecontainer[containerindex].tryremove(key, out datamodel datamodel);
return false;
}
return true;
}
return false;
}
}
internal class datamodel
{
/// <summary>
/// 生命周期类型
/// </summary>
public lifecycle lifecycletype { get; set; }
/// <summary>
/// 到期时间
/// </summary>
public datetime expirationtime { get; set; }
/// <summary>
/// 缓存数据
/// </summary>
public object cachedata { get; set; }
}
/// <summary>
/// 生命周期枚举
/// </summary>
internal enum lifecycle
{
lasting = 0,//持久
temp = 1//临时
}
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