Netty ServerSocket 和子节点正常关闭

Question

我想关闭 Netty 服务器上的服务器套接字，然后在执行资源清理之前等待所有子进程完成处理。

步骤 1 使用此代码等待 Netty 服务器套接字在主线程上关闭，其中 b 是 ServerBootstrap

的一个实例

b.bind ( getPort ( p ) ).sync ().channel ().closeFuture ().sync ()

步骤 2 指示服务器套接字从应用程序中其他地方的不同线程关闭

步骤 3 指示所有客户端关闭，我将拥有执行此操作的应用程序代码

步骤 4 等待所有客户端套接字关闭，这就是我想知道的方法。如何获取所有客户端套接字、服务器子级的列表，然后等待它们全部关闭？

Netty版本4.1.1.Final

我使用以下代码片段设置 Netty 服务器套接字

EventLoopGroup bossGroup = new NioEventLoopGroup ( 1 );
EventLoopGroup workerGroup = new NioEventLoopGroup ( Math.max ( 1, Runtime.getRuntime ().availableProcessors () / 2 ) );
try
{
  ServerBootstrap b = new ServerBootstrap ();
  b.group ( bossGroup, workerGroup )
  .channel ( NioServerSocketChannel.class )
  .childHandler ( new ServerInitializer ( sslctx, jsonIOManager, dispatcherPool, factory ) )
  .childOption ( ChannelOption.TCP_NODELAY, Boolean.TRUE )
  .childOption ( ChannelOption.SO_KEEPALIVE, Boolean.TRUE );

  // wait till server socket is closed    
  b.bind ( getPort ( p ) ).sync ().channel ().closeFuture ().sync ();
  // instruct all clients to shutdown
  dispatcherPool.shutdown ();

  // wait on all sockets that are children of the server socket to close
  // How can i do this?

}
finally
{
  bossGroup.shutdownGracefully ();
  workerGroup.shutdownGracefully ();
}

Answer 1

从 netty 4.x user guide 看来，只需等到 shutdownGracefully returns 就会等到所有套接字都关闭。

Shutting down a Netty application is usually as simple as shutting down all EventLoopGroups you created via shutdownGracefully(). It returns a Future that notifies you when the EventLoopGroup has been terminated completely and all Channels that belong to the group have been closed.

Netty ServerSocket 和子节点正常关闭

Netty ServerSocket and Children Graceful Shutdown

java

application-shutdown

netty

server