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I understand a channel.write(outBuffer) can fail to write all the contents of outBuffer because the underlying socket buffer is full. Then you have to register OP_WRITE and wait for selector callbacks. However I don't want to write a partial message and I would like to wait until the channel.write operation is capable of writing out my full message. Is that possible or I have to write to find out how much I can write?

Talking about a http://docs.oracle.com/javase/6/docs/api/java/nio/channels/WritableByteChannel.html of course.

Andy Thomas
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chrisapotek
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  • What kind of channel are you talking about? Channel itself only has `isOpen` and `close` methods: http://docs.oracle.com/javase/6/docs/api/ – Lucas Apr 29 '13 at 15:24
  • @chrisapotek - Since NIO is used in Java to refer to the "New IO" packages in java.nio, changed the title to "non-blocking IO", per your comments in my answer, which I'm now deleting. – Andy Thomas Apr 29 '13 at 16:18

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Don't worry about it. There is no such thing as a 'message' in TCP. TCP may break your write up any way it likes, and the receiver may receive it in one read or N or anything in between.

user207421
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