[nanomsg] Re: Polling
- From: Gonzalo Diethelm <gonzalo.diethelm@xxxxxxxxx>
- To: Martin Sustrik <sustrik@xxxxxxxxxx>
- Date: Tue, 2 Jul 2013 06:24:16 -0400
Hi Martin,
I will check these libraries and report back. Thanks!
On Tuesday, July 2, 2013, Martin Sustrik wrote:
> Hi Gonzalo,
>
> /"Polling mechanism, given that it is a glue between disparate types of
>> subsystems (file systems, networking stack, etc.) must be defined by the
>> platform rather than by any individual subsystem (such as nanomsg).
>> Thus, binding developer should try to integrate nanomsg into the native
>> polling mechanism. File descriptors retrieved from the socket using
>> NN_SNDFD and NN_RCVFD socket options can be used for this purpose. If
>> the language doesn't provide a native polling mechanism or if it doesn't
>> provide a way to plug arbitrary file descriptors into the native polling
>> mechanism, then the binding should do the second best thing and
>> implement a polling function/object itself."
>> /
>>
>> It seems Java would fall under the category of not providing a sensible
>> way to integrate these nanomsg-provided file descriptors into a native
>> polling mechanism; at least I have not found a clean way to do that. I
>> would like to ask three questions on this list:
>>
>
> It's possible that Java, actually doesn't have a generic mechanism to
> handle networking, similar to BSD sockets. If so, and the only protocols
> that can be used from Java are TCP and UDP, it's pretty sad state of
> affairs.
>
> Anyway, after some googling I've found few Java libraries that make other
> protocols available:
>
> SCTP:
> http://openjdk.java.net/**projects/sctp/javadoc/index.**html<http://openjdk.java.net/projects/sctp/javadoc/index.html>
> DCCP: http://code.google.com/p/**jdccp/ <http://code.google.com/p/jdccp/>
> ICMP:
> http://www.veraxsystems.com/**en/products/icmplib<http://www.veraxsystems.com/en/products/icmplib>
>
> It would be worth checking how these libraries handle polling. If they
> don't it looks like we are on our own. If so, I'll add nn_poll() function
> to nanomsg. It's not much work, although, architecturally, the function
> doesn't belong there.
>
> Martin
>
--
Gonzalo Diethelm
gonzalo.diethelm@xxxxxxxxx
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