websocket - Netty send final message to ChannelGroup before closing -

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i'm new netty , i'm trying implement websocket server. follow examples provided in source code.

i graceful shutdown of netty server , want catch , send last message connected channels , close server. how possible? use defaultchannelgroup

netty version 4.0.24 , have websocket implementation similar examples provided

and following resource: https://gist.github.com/aolshevskiy/1653087

implement maybe beforecloselistener?

thank in advance

finally, have managed adding defaultchannelgroup , sending message connected channels, problem was adding each channel @ stage , ending having nioserversocketchannel instead of niosocketchannel job me.


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