Re: [netnice-users] [Netnice-developer] VIFlet - flexibly extends VIF functionality with embedded Java technology!

[Matt D. <mat...@gm...>]

Takashi Okumura wrote:
> Dear netnice users/hackers,
> 
> I have a good news, and a request, for you today.
> 
> So far, VIFs can flexibly control network traffic on a host, but, it
> cannot provide ALTQ-like queuing control, for example, queuing control
> by address-port pairs. So, I have implemented a new mechanism for VIF
> system, VIFlet. As the name suggests, VIFlet is a software component,
> based on the Java technology. A VIFlet is a container of methods to
> perform processing of packets. On the new system, Java Virtual Machines
> are embedded on each VIF, and users can run their own VIFlets to
> customize functionality of their VIFs. To write such a program,
> you can simply use ordinary Java development environment. Just inherit
> VIFlet class provided in the class library, and override necessary
> methods. Sample VIFlet is attached below, and you will notice that
> it is really easy to write a VIFlet. To boost the performance, I also
> implemented a in-kernel Just-In-Time compiler, which speeds up
> execution of VIFlets close to hardcoded implementations.
> 
Ahh very cool.  I can imagine this might consume quite a bit of 
resources?  Although I must say, that is quite a good idea to add it to 
the kernel for improved performance.

Congrats!

-Matt