/// <summary>
/// 保存数据
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
public void Set(TKey key, TValue value)
{
locker.EnterWriteLock();
try
{
dictionary[key] = value;
LinkedListNode <TKey> item = null;
if (dicLinkIndex.TryGetValue(key, out item))
{
linkedList.Remove(item);
}
dicLinkIndex[key] = linkedList.AddFirst(key);
if (linkedList.Count > _capacity)
{
dictionary.Remove(linkedList.Last.Value);
dicLinkIndex.Remove(linkedList.Last.Value);
linkedList.RemoveLast();
dicRefresh.Remove(linkedList.Last.Value);
RemoveEntity <TKey, TValue> entity = new RemoveEntity <TKey, TValue>()
{
Key = linkedList.Last.Value, Value = dictionary[linkedList.Last.Value], RemoveType = RemoveType.Capacity
};
removeEntities.Add(entity);
dictionary.Remove(linkedList.Last.Value);
}
Refresh(key);
}
finally { locker.ExitWriteLock(); }
}
/// <summary>
/// 更新时间
/// </summary>
/// <param name="key"></param>
private void Refresh(TKey key)
{
dicRefresh[key] = DateTime.Now.Ticks;
if (!isCheckTime)
{
return;
}
if (!isCheckThread)
{
isCheckThread = true;
Task.Factory.StartNew(() =>
{
double wait = (DateTime.Now - checkTime).TotalSeconds;
if (wait < cacheTime)
{
//如果上次监测到本次监测还未到设置的保持时间，
//则等待该时间差后再检查
double sleep = ((double)cacheTime - wait) * 1000 + 1;
Thread.Sleep((int)sleep);
}
locker.EnterWriteLock();
try
{
LinkedListNode <TKey> last = null;
long tick;
long curTick = DateTime.Now.Ticks;
last = linkedList.Last;//重后往前找
while (last != null)
{
if (dicRefresh.TryGetValue(last.Value, out tick))
{
if ((curTick - tick) > checkTicks)
{
dicLinkIndex.Remove(last.Value);
dicRefresh.Remove(last.Value);
linkedList.RemoveLast();
RemoveEntity <TKey, TValue> entity = new RemoveEntity <TKey, TValue>()
{
Key = last.Value, Value = dictionary[last.Value], RemoveType = RemoveType.TimeOut
};
removeEntities.Add(entity);
dictionary.Remove(last.Value);
}
else
{
break;
}
}
last = linkedList.Last;
}
}
finally { locker.ExitWriteLock(); }
isCheckThread = false;
checkTime = DateTime.Now;
});
}
}
/// <summary>
/// 启动移除通知
/// </summary>
private void RemoveNotice()
{
Task.Factory.StartNew(() =>
{
while (true)
{
RemoveEntity <TKey, TValue> item = null;
if (removeEntities.TryTake(out item, 500))
{
if (this.RemoveEntitiesEvent != null)
{
RemoveEntitiesEvent(CacheName, item);
}
}
}
});
}