CODEWITHSUNDEEP
javaselectorniosocketchannelbroken-pipe
Paparika
Paparika

Reputation: 147

How to make sure the SocketChannel is really connected when using NIO?

I'm working on a NIO client program on Android, Basically it functions well, but when the network is not avaliable(WIFI is disabled, etc), I have no idea how to distinguish the socket is 'really' connected, SocketChannel.finishConnect() always returns true even there is no avaliable network.If I try to write to a unconnected SocketChannel, an Broken pipe exception will happen.

So I wonder how to make sure the SocketChannel is really connected?

Upvotes: 1

Views: 1734

Answers (1)

user207421
user207421

Reputation: 311008

If I try to write to a unconnected SocketChannel, an Broken pipe exception will happen.

Correct.

So I wonder how to make sure the SocketChannel is really connected?

That's how. There is no API that can tell you. TCP doesn't work like that. The only way to detect a broken TCP connection is to try to use it.

Upvotes: 1

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