... so something like this? Is this safe? Won't this create a memory leak?
String data = "some data";
TextWebSocketFrame frame = new TextWebSocketFrame(data)
channels.forEach(c -> {
c.write(frame.duplicate().retain());
}
}
frame.release()
On Friday, April 12, 2019 at 11:16:35 AM UTC+2, Norman Maurer wrote:
>
> Actually you want to call ByteBuf.retainedDuplicate() as you also need to
> increment the reference count.
>
>
> On 12. Apr 2019, at 08:19, Frederic <[email protected] <javascript:>>
> wrote:
>
> You can create one buffer and then use to send to all your sockets the
> very same buffer content but using different indexes (read here) using the
> ByteBuf.duplicate() method.
>
> https://netty.io/4.1/api/io/netty/buffer/ByteBuf.html#duplicate--
>
> Javadoc says:
>
>
> public abstract ByteBuf
> <https://netty.io/4.1/api/io/netty/buffer/ByteBuf.html> duplicate()
>
> Returns a buffer which shares the whole region of this buffer. Modifying
> the content of the returned buffer or this buffer affects each other's
> content while they maintain separate indexes and marks. This method does
> not modify readerIndex or writerIndex of this buffer.
>
> The reader and writer marks will not be duplicated. Also be aware that
> this method will NOT call retain()
> <https://netty.io/4.1/api/io/netty/buffer/ByteBuf.html#retain--> and so
> the reference count will NOT be increased.
> Returns:A buffer whose readable content is equivalent to the buffer
> returned by slice()
> <https://netty.io/4.1/api/io/netty/buffer/ByteBuf.html#slice-->. However
> this buffer will share the capacity of the underlying buffer, and therefore
> allows access to all of the underlying content if necessary.
>
> Le vendredi 12 avril 2019 06:31:57 UTC+2, [email protected] a écrit :
>>
>> Are there any optimizations available if I'd like to send the very same
>> data to dozens (or hundreds) of Websocket channels?
>> At a minimum I'd like to avoid creating (and copying) the data to new
>> buffers. Ideally I would provide a single buffer and a list of channels.
>>
>
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