// With no EventExecutor specified, h1 will be always invoked by EventLoop 'l'.
ch.pipeline().addLast(h1);
// h2 will be always invoked by EventExecutor 'e1'.
ch.pipeline().addLast(e1, h2);
// h3 will be always invoked by EventExecutor 'e2'.
ch.pipeline().addLast(e2, h3);
l.register(ch).sync().channel().connect(localAddr).sync();
// Fire inbound events from all possible starting points.
ch.pipeline().fireChannelRead("1");