public void AddLast(string name, ChannelHandler handler)
{
DefaultChannelHandlerContext context = new DefaultChannelHandlerContext(this, name, handler);
context.Prev = Tail.Prev;
context.Next = Tail;
Tail.Prev.Next = context;
Tail.Prev = context;
}
public void AddFirst(string name, ChannelHandler handler)
{
DefaultChannelHandlerContext context = new DefaultChannelHandlerContext(this, name, handler);
context.Next = Head.Next;
context.Prev = Head;
Head.Next.Prev = context;
Head.Next = context;
}
/// <summary>
/// 获取下一个Handler
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
private ChannelHandlerContext GetPrevChannelHandlerContext(Type type)
{
DefaultChannelHandlerContext context = Prev;
while (null != context && !type.IsAssignableFrom(context.GetType()))
{
context = context.Prev;
}
return(context);
}
/// <summary>
/// 获取下一个Handler
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
private ChannelHandlerContext GetNextChannelHandlerContext(Type type)
{
DefaultChannelHandlerContext context = Next;
while (null != context && null != context.ChannelHandler && !type.IsAssignableFrom(context.ChannelHandler.GetType()))
{
context = context.Next;
}
return(context);
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="channel"></param>
public DefaultChannelPipeline(SocketServerChannel channel)
{
DefaultChannelHandlerContext emptyHeader = new DefaultChannelHandlerContext(this, "Internal_Head_Handler", null);
DefaultChannelHandlerContext emptyTailer = new DefaultChannelHandlerContext(this, "Internal_Tail_Handler", null);
Head = emptyHeader;
Tail = emptyTailer;
Head.Next = Tail;
Tail.Prev = Head;
Channel = channel;
}
public void Remove(ChannelHandler handler)
{
DefaultChannelHandlerContext context = Head;
if (context != null && context == handler)
{
DefaultChannelHandlerContext prev = context.Prev;
DefaultChannelHandlerContext next = context.Next;
if (null != prev)
{
prev.Next = next;
}
if (null != next)
{
next.Prev = prev;
}
}
}
public void Replace(ChannelHandler oldHandler, string newName, ChannelHandler newHandler)
{
DefaultChannelHandlerContext newContext = new DefaultChannelHandlerContext(this, newName, newHandler);
DefaultChannelHandlerContext context = Head;
if (context != null && context == oldHandler)
{
newContext.Prev = context.Prev;
newContext.Next = context.Next;
DefaultChannelHandlerContext prev = context.Prev;
DefaultChannelHandlerContext next = context.Next;
if (null != prev)
{
prev.Next = newContext;
}
if (null != next)
{
next.Prev = newContext;
}
}
}
