Re: multicast ping

You could do this with simple multicasting code, or you could use 
JGroups (with the bare-bones.xml config) to simply send out a multicast 
and wait for the first reply. So, no, you don't need to rip out some 
JGroups-internal code and use it in your project, but you could simply 
use a JChannel to do that.

Robert Bowen wrote:
> Hello all.
>
> I've been out of the JGroups loop for a while but diligently perusing 
> the mailing list.
>
> I had a question about an app I need to write. What I need to do is, 
> in a given moment send out a multicast "ping" and return the ip of the 
> first machine that answers. I know that internally this is what 
> JGroups does to keep an updated list of "alive" machines. My question 
> is, can I use the same internal mechanism JGroups uses? I don't think 
> so, not without deconstructing the code.
>
> The other option is to send out my own multicast message, but if I'm 
> not mistaken, multicast messages don't send back responses.
>
> Any thoughts?

-- 
Bela Ban
Lead JGroups / Manager JBoss Clustering Group
JBoss - a division of Red Hat

-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642