public CacheType(ExpiredTimeType type, int validTime)
{
this.mTables = new Hashtable(50000);
switch (type)
{
case ExpiredTimeType.D:
this.mTimeout = new TimeSpan(validTime, 0, 0, 0);
return;
case ExpiredTimeType.H:
this.mTimeout = new TimeSpan(validTime, 0, 0);
return;
case ExpiredTimeType.M:
this.mTimeout = new TimeSpan(0, validTime, 0);
return;
default:
this.mTimeout = new TimeSpan(1, 0, 0, 0);
return;
}
}
public CacheLayer(int count, ExpiredTimeType type, int validTime, int upgradeHit)
{
this.mTables = new Hashtable(count);
this.mCount = count;
switch (type)
{
case ExpiredTimeType.D:
this.mTimeout = new TimeSpan(validTime, 0, 0, 0);
break;
case ExpiredTimeType.H:
this.mTimeout = new TimeSpan(validTime, 0, 0);
break;
case ExpiredTimeType.M:
this.mTimeout = new TimeSpan(0, validTime, 0);
break;
default:
this.mTimeout = new TimeSpan(1, 0, 0, 0);
break;
}
this.UpgradeHit = upgradeHit;
}
/// <summary>
/// 添加，已存在则更新缓存
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
/// <param name="expiredTime">超期时间</param>
/// <param name="expiredTimeType">超期类型</param>
/// <param name="changeToken">超期自定义ChangeToken，可用以自定义条件和回调</param>
/// <returns></returns>
public void Set(string key, object value, TimeSpan expiredTime = default(TimeSpan), ExpiredTimeType expiredTimeType = ExpiredTimeType.Absolute, IChangeToken changeToken = null)
{
//设置默认超时时间
if (expiredTime == default(TimeSpan))
{
expiredTime = TimeSpan.FromMinutes(20);
}
object obj;
var isExist = _memoryCache.TryGetValue(key, out obj);
if (!isExist)
{
_memoryCache.GetOrCreate(key, v =>//幻读？
{
switch (expiredTimeType)
{
case ExpiredTimeType.Absolute:
v.SetAbsoluteExpiration(expiredTime);
break;
case ExpiredTimeType.Sliding:
v.SetSlidingExpiration(expiredTime);
break;
case ExpiredTimeType.Custom:
v.AddExpirationToken(changeToken);
break;
default:
break;
}
return(value);
});
}
else
{
switch (expiredTimeType)
{
case ExpiredTimeType.Absolute:
_memoryCache.Set(key, value, DateTime.UtcNow.Add(expiredTime));
break;
case ExpiredTimeType.Sliding:
_memoryCache.Set(key, value, expiredTime);
break;
case ExpiredTimeType.Custom:
_memoryCache.Set(key, value, changeToken);
break;
default:
break;
}
}
}
/// <summary>
/// 添加，已存在则抛错
/// </summary>
/// <param name="key">缓存key</param>
/// <param name="value">缓存value</param>
/// <param name="expiredTime">超期时间</param>
/// <param name="expiredTimeType">超期类型</param>
/// <param name="changeToken">超期自定义ChangeToken，可用以自定义条件和回调</param>
/// <returns></returns>
public void Add(string key, object value, TimeSpan expiredTime = default(TimeSpan), ExpiredTimeType expiredTimeType = ExpiredTimeType.None, IChangeToken changeToken = null)
{
object obj;
var isExist = _memoryCache.TryGetValue(key, out obj);
if (isExist)
{
throw new Exception("Cache contains this key!");
}
this.Set(key, value, expiredTime, expiredTimeType, changeToken);
}
