How to do the operation every 5 seconds netty (Server)

Question

我以前在workerman php工作，创建一个websocket服务器，但由于我经常在java上工作，我决定研究netty，我想知道如何每隔5秒向所有用户发送一个hello消息，在workerman这是通过计时器。

Answer 1

In Netty every EventLoop extends ScheduledExecutorService which means you could schedule a task to run every 5 seconds like this:

Channel ch = ...;
ch.eventLoop().scheduleAtFixedRate(() -> {}, 0, 5, TimeUnit.SECONDS);