/// <summary>
/// 是否存在缓存
/// </summary>
/// <param name="key">标识</param>
/// <returns></returns>
public override bool Contains(string key)
{
if (theState.ContainsKey(key))
{
CacheDependencyInfo info = theState[key];
bool isOutTime = info.createTime.AddMinutes(info.cacheMinutes) < DateTime.Now;
if (!isOutTime && theCache[key] != null)
{
return(true);
}
else
{
lock (lockObj)
{
try
{
theState.Remove(key);
if (isOutTime)
{
theCache.Remove(key);
}
}
catch
{
//errorCount++;
}
}
}
}
return(false);
}
/// <summary>
/// 获取目标的文件依赖是否发生更改
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public override bool GetFileDependencyHasChanged(string key)
{
if (Contains(key))
{
CacheDependencyInfo info = theState[key];
if (info != null)
{
return(info.IsChanged);
}
}
return(true);
}
/// <summary>
/// 手动对缓存象标识为已更改
/// </summary>
public override void SetChange(string key, bool isChange)
{
if (Contains(key))
{
CacheDependencyInfo info = theState[key];
if (info != null)
{
info.SetState(isChange);
}
}
else
{
Add("Cache:Temp_" + key, isChange, null, 0.1);//缓存失效时，产生6秒的key缓冲
}
}
/// <summary>
/// 相对底层Cache添加方法,添加一个Cache请用Add方法
/// </summary>
/// <param name="key">标识</param>
/// <param name="value">对象值</param>
/// <param name="fileName">依赖文件</param>
/// <param name="cacheMinutes">缓存分钟数</param>
/// <param name="level" >缓存级别</param>
private void Insert(string key, object value, string fileName, double cacheMinutes, CacheItemPriority level)
{
CacheDependency theCacheDependency = null;
if (!string.IsNullOrEmpty(fileName))
{
theCacheDependency = new CacheDependency(fileName);
}
double cacheTime = cacheMinutes;
if (cacheMinutes <= 0)
{
cacheTime = AppConfig.Cache.DefaultCacheTime;
}
DateTime cTime = DateTime.Now.AddMinutes(cacheTime);
theCache.Insert(key, value == null ? string.Empty : value, theCacheDependency, cTime, TimeSpan.Zero, level, null);
CacheDependencyInfo info = new CacheDependencyInfo(theCacheDependency, cacheTime);
lock (lockObj)
{
try
{
if (theState.ContainsKey(key))
{
theState[key] = info;
}
else
{
theState.Add(key, info);
}
TimeSpan ts = cTime - startTime;
int workCount = (int)ts.TotalMinutes / taskInterval;//计算出离开始有多少个间隔时间。
if (keyTime.ContainsKey(workCount))
{
keyTime[workCount].Append("," + key);
}
else
{
keyTime.Add(workCount, new StringBuilder(key));
}
}
catch
{
}
}
getCacheTableTime = DateTime.Now.AddMinutes(-5);//设置缓存表过期。
}
/// <summary>
/// 获取缓存对象是否被手工标识为已更改
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public override bool GetHasChanged(string key)
{
if (Contains(key))
{
CacheDependencyInfo info = theState[key];
if (info != null)
{
return(info.IsChanged ? false : info.UserChange);
}
}
else if (Contains("Cache:Temp_" + key))
{
return((bool)theCache.Get("Cache:Temp_" + key));
}
return(false);
}
/// <summary>
/// ��Եײ�Cache��ӷ���,���һ��Cache����Add����
/// </summary>
/// <param name="key">��ʶ</param>
/// <param name="value">����ֵ</param>
/// <param name="fileName">�����ļ�</param>
/// <param name="cacheMinutes">���������</param>
/// <param name="level" >���漶��</param>
private void Insert(string key, object value, string fileName, double cacheMinutes, CacheItemPriority level)
{
CacheDependency theCacheDependency = null;
if (!string.IsNullOrEmpty(fileName))
{
theCacheDependency = new CacheDependency(fileName);
}
double cacheTime = cacheMinutes;
if (cacheMinutes <= 0)
{
cacheTime = AppConfig.Cache.DefaultCacheTime;
}
DateTime cTime = DateTime.Now.AddMinutes(cacheTime);
theCache.Insert(key, value == null ? string.Empty : value, theCacheDependency, cTime, TimeSpan.Zero, level, null);
CacheDependencyInfo info = new CacheDependencyInfo(theCacheDependency, cacheTime);
lock (lockObj)
{
try
{
if (theState.ContainsKey(key))
{
theState[key] = info;
}
else
{
theState.Add(key, info);
}
TimeSpan ts = cTime - startTime;
int workCount = (int)ts.TotalMinutes / taskInterval;//������뿪ʼ�ж��ٸ����ʱ�䡣
if (keyTime.ContainsKey(workCount))
{
keyTime[workCount].Append("," + key);
}
else
{
keyTime.Add(workCount, new StringBuilder(key));
}
}
catch
{
}
}
getCacheTableTime = DateTime.Now.AddMinutes(-5);//���û������ڡ�
}