/// <summary>
/// 使用当前请求中的值更新会话状态数据存储区中的会话项信息，并清除对数据的锁定
/// </summary>
/// <param name="context">上下文</param>
/// <param name="id">SessionID</param>
/// <param name="item">Session选项</param>
/// <param name="lockId">锁ID</param>
/// <param name="newItem">如果为 true，则将会话项标识为新项；如果为 false，则将会话项标识为现有的项</param>
public override void SetAndReleaseItemExclusive(HttpContext context, string id, SessionStateStoreData item, object lockId, bool newItem)
{
var binary = SessionSerializer.Serialize(item.Items as SessionStateItemCollection);
var session = new SessionItem()
{
LockId = lockId == null ? 0 : (int)lockId,
Binary = binary,
TimeOut = item.Timeout,
ActionFlag = SessionStateActions.None
};
this.cachedEx.Set(id, session, TimeSpan.FromMinutes(item.Timeout));
}
/// <summary>
/// 从会话数据存储区中返回只读会话状态数据
/// </summary>
/// <param name="isExclusive">是否是竞争锁的</param>
/// <param name="context">当前请求的 HttpContext</param>
/// <param name="id">当前请求的 SessionState.HttpSessionState.SessionID</param>
/// <param name="locked">如果请求的会话项在会话数据存储区被锁定，请包含一个设置为 true 的布尔值；否则请包含一个设置为 false 的布尔值</param>
/// <param name="lockAge">请包含一个设置为会话数据存储区中的项锁定时间的 System.TimeSpan 对象</param>
/// <param name="lockId">请包含一个设置为当前请求的锁定标识符的对象</param>
/// <param name="actions">请包含 SessionState.SessionStateActions 值之一，指示当前会话是否为未初始化的无Cookie会话</param>
/// <returns></returns>
private SessionStateStoreData GetItem(bool isExclusive, HttpContext context, string id, out bool locked, out TimeSpan lockAge, out object lockId, out SessionStateActions actions)
{
locked = false;
lockAge = TimeSpan.Zero;
lockId = null;
actions = SessionStateActions.None;
var session = this.cachedEx.Get <SessionItem>(id).Value;
if (session == null)
{
return(null);
}
actions = session.ActionFlag;
if (session.Locked)
{
locked = true;
lockId = session.LockId;
lockAge = DateTime.UtcNow - session.LockTime;
return(null);
}
if (isExclusive == true)
{
locked = session.Locked = true;
session.LockTime = DateTime.UtcNow;
lockAge = TimeSpan.Zero;
lockId = ++session.LockId;
}
session.ActionFlag = SessionStateActions.None;
this.cachedEx.Set(id, session, TimeSpan.FromMinutes(session.TimeOut));
var staticObjects = SessionStateUtility.GetSessionStaticObjects(context);
var sessionCollection = actions == SessionStateActions.InitializeItem ? new SessionStateItemCollection() : SessionSerializer.Deserialize(session.Binary);
return(new SessionStateStoreData(sessionCollection, staticObjects, session.TimeOut));
}