Jetty的核心

8516830

　　Jetty的核心类
　　Server
　　ThreadPool(有两个实现)，见这里http://lixjluck.iteye.com/blog/1129558
　　SelectChannelConnector
　　SelectorManager
　　SelectSet
　　SelectChannelEndPoint
　　HttpConnection(HttpInput,  HttpOutput,  HttpGenerator)
　　Handler
　　Server启动过程

 SelectChannelConnector初始化过程

　　open方法做了什么事情？

    public void open() throws IOException
{
synchronized(this)
{
if (_acceptChannel == null)
{
// Create a new server socket
_acceptChannel = ServerSocketChannel.open();
// Set to blocking mode
_acceptChannel.configureBlocking(true);
// Bind the server socket to the local host and port
_acceptChannel.socket().setReuseAddress(getReuseAddress());
InetSocketAddress addr = getHost()==null?new InetSocketAddress(getPort()):new InetSocketAddress(getHost(),getPort());
_acceptChannel.socket().bind(addr,getAcceptQueueSize());
_localPort=_acceptChannel.socket().getLocalPort();
if (_localPort<=0)
throw new IOException("Server channel not bound");
}
}
}
　　主要是启动web服务的监听端口，且配置成blocking模式。
　　Acceptor

acceptorThread的作用：
 

• Acceptor类 位于AbstractConnector.Acceptor
  
• 实际调用到SelectSet.doSelect
  
• Select and dispatch tasks found from changes and the selector
  

 
acceptor线程数量配置，见 http://lixjluck.iteye.com/blog/1129479 #acceptors