/// <summary>
/// 获取EventWaitHandle,获取成功返回获取EventWaitHandle;失败返回null
/// </summary>
/// <param name="id">EventWaitHandle的唯一标识</param>
/// <returns>EventWaitHandle</returns>
public static EventWaitHandle GetEventWaitHandle(object id)
{
EventWaitHandleInfo eventWaitHandleInfo = GetEventWaitHandleInfo(id);
if (eventWaitHandleInfo != null)
{
return(eventWaitHandleInfo.EventWaitHandle);
}
return(null);
}
/// <summary>
/// 创建并添加EventWaitHandle
/// </summary>
/// <param name="id">EventWaitHandle的唯一标识</param>
/// <param name="expirationMilliseconds">缓存项有效时间,小于等于0永不过期,单位/毫秒</param>
/// <param name="tag">Tag</param>
/// <returns>创建的EventWaitHandle</returns>
public static EventWaitHandleInfo CreateEventWaitHandle(object id, int expirationMilliseconds = -1, object tag = null)
{
var eventWaitHandleInfo = new EventWaitHandleInfo(id, new AutoResetEvent(false), tag);
if (_eventWaitHandleDic.TryAdd(id, eventWaitHandleInfo))
{
AddIdToCache(id, expirationMilliseconds);
return(eventWaitHandleInfo);
}
eventWaitHandleInfo.EventWaitHandle.Dispose();
throw new ArgumentException($"key{id}已存在");
}
/// <summary>
/// 添加或更新外部创建的EventWaitHandle,如果id存在则替换并返回旧的项,否则则添加返回null
/// </summary>
/// <param name="id">EventWaitHandle的唯一标识</param>
/// <param name="eventWaitHandle">EventWaitHandle</param>
/// <param name="expiration">缓存项有效时间,小于等于0永不过期,单位/毫秒</param>
/// <param name="tag">Tag</param>
/// <returns>旧的EventWaitHandle</returns>
public static EventWaitHandle AddOrUpdateEventWaitHandle(object id, EventWaitHandle eventWaitHandle, int expiration = -1, object tag = null)
{
EventWaitHandleInfo oldEventWaitHandleInfo = null;
var newValue = new EventWaitHandleInfo(id, eventWaitHandle, tag);
_eventWaitHandleDic.AddOrUpdate(id, newValue, (key, oldValue) =>
{
oldEventWaitHandleInfo = oldValue;
return(newValue);
});
AddIdToCache(id, expiration);
if (oldEventWaitHandleInfo != null)
{
return(oldEventWaitHandleInfo.EventWaitHandle);
}
else
{
return(null);
}
}