注销并再次在Java NIO中注册

Question

Is it possible to unregister and then register again later on with the same selector ? I have to limit the amount of connection I accept and do key.cancel() to stop receiving OP_ACCEPT events.

server.register(selector, SelectionKey.OP_ACCEPT);
...
key.cancel()
...

If a connection is closed, I cant run register(..) again, getting a java.nio.channels.CancelledKeyException

Javadoc for register(..) : throw CancelledKeyException if this channel is currently registered with the given selector but the corresponding key has already been cancelled

What is the way to achieve what I am trying to do ?

Answer 1

只需清除要在密钥的interestOps清除的位即可：例如key.interestOps(0) 。