//
/// <summary>
/// 归还一个通道
/// </summary>
/// <param name="channel">通道对象</param>
public void ReturnChannel(LibraryChannel channel)
{
LibraryChannelWrapper wrapper = null;
if (this.m_lock.TryEnterWriteLock(m_nLockTimeout) == false)
{
throw new LockException("锁定尝试中超时");
}
try
{
wrapper = _findUsedChannel(channel);
if (wrapper != null)
{
// wrapper.InUsing = false;
MoveToFreeList(wrapper);
}
}
finally
{
this.m_lock.ExitWriteLock();
}
// testing
// CleanChannel();
}
//
/// <summary>
/// 征用一个通道
/// </summary>
/// <param name="strUrl">服务器 URL</param>
/// <param name="strUserName">用户名</param>
/// <param name="strLang">语言代码。如果为空，表示不在意通道的语言代码</param>
/// <returns>返回通道对象</returns>
public LibraryChannel GetChannel(string strUrl,
string strUserName,
string strLang = "")
{
LibraryChannelWrapper wrapper = null;
if (this.m_lock.TryEnterWriteLock(m_nLockTimeout) == false)
{
throw new LockException("锁定尝试中超时");
}
try
{
wrapper = this._findFreeChannel(strUrl, strUserName, strLang);
if (wrapper != null)
{
LibraryChannel result = wrapper.Channel;
return(result);
}
if (this._usedList.Count + this._freeList.Count >= MaxCount)
{
// 清理不用的通道
int nDeleteCount = _cleanFreeChannel(false);
if (nDeleteCount == 0)
{
// 全部都在使用
throw new Exception("通道池已满，请稍后重试获取通道");
}
}
// 如果没有找到
LibraryChannel inner_channel = new LibraryChannel();
inner_channel.Url = strUrl;
inner_channel.UserName = strUserName;
inner_channel.Lang = strLang;
inner_channel.BeforeLogin -= new BeforeLoginEventHandle(channel_BeforeLogin);
inner_channel.BeforeLogin += new BeforeLoginEventHandle(channel_BeforeLogin);
inner_channel.AfterLogin -= inner_channel_AfterLogin;
inner_channel.AfterLogin += inner_channel_AfterLogin;
wrapper = new LibraryChannelWrapper();
wrapper.Channel = inner_channel;
// wrapper.InUsing = true;
this._usedList.Add(wrapper);
return(inner_channel);
}
finally
{
this.m_lock.ExitWriteLock();
}
}
// 清理处在未使用状态的通道
// parameters:
// strUserName 希望清除用户名为此值的全部通道。如果本参数值为空，则表示清除全部通道
// return:
// 清理掉的通道数目
int _cleanFreeChannel(bool bLock, string strUserName = "")
{
List <LibraryChannelWrapper> deletes = new List <LibraryChannelWrapper>();
if (bLock == true)
{
if (this.m_lock.TryEnterWriteLock(m_nLockTimeout) == false)
{
throw new LockException("锁定尝试中超时");
}
}
try
{
for (int i = 0; i < this._freeList.Count; i++)
{
LibraryChannelWrapper wrapper = this._freeList[i];
if (string.IsNullOrEmpty(strUserName) == true || wrapper.Channel.UserName == strUserName)
{
this._freeList.RemoveAt(i);
i--;
deletes.Add(wrapper);
}
}
}
finally
{
if (bLock == true)
{
this.m_lock.ExitWriteLock();
}
}
foreach (LibraryChannelWrapper wrapper in deletes)
{
wrapper.Channel.BeforeLogin -= new BeforeLoginEventHandle(channel_BeforeLogin);
wrapper.Channel.AfterLogin -= inner_channel_AfterLogin;
wrapper.Channel.Close();
}
return(deletes.Count);
}
LibraryChannelWrapper MoveToFreeList(LibraryChannelWrapper wrapper)
{
this._usedList.Remove(wrapper);
this._freeList.Add(wrapper);
return(wrapper);
}