internal static int m_nLockTimeout = 5000; // 5000=5秒
//
/// <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 = null,
string strClientIP = null)
{
LibraryChannelWrapper wrapper = null;
if (this.m_lock.TryEnterWriteLock(m_nLockTimeout) == false)
{
throw new LockException("锁定尝试中超时");
}
try
{
wrapper = this._findChannel(strUrl, strUserName, strLang, true);
if (wrapper != null)
{
return(wrapper.Channel);
}
// 如果没有找到
LibraryChannel inner_channel = new LibraryChannel();
inner_channel.Url = strUrl;
inner_channel.UserName = strUserName;
if (strLang != null)
{
inner_channel.Lang = strLang;
}
if (strClientIP != null)
{
inner_channel.ClientIP = strClientIP;
}
// test
// inner_channel.ClientIP = "test:127.0.0.1";
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;
if (this.Count >= MaxCount)
{
// TODO: 这一个部分放在写锁定范围内，是否会导致其他请求排队超时？
// 清理不用的通道
int nDeleteCount = _cleanChannel(false,
(channel) => { return(true); });
if (nDeleteCount == 0)
{
inner_channel?.Dispose();
// 全部都在使用
throw new Exception("通道池已满，请稍后重试获取通道");
}
}
this.Add(wrapper);
return(inner_channel);
}
finally
{
this.m_lock.ExitWriteLock();
}
}
