[jdev] Rate Shaping / Open Source Java implementation ?

[Ernest Nova]

I am looking for an open source java implementation of a general rate
shaping queue (token bucket, leaky bucket etc) for use in an
application to smooth out a bursty message stream.

The application is a multiplexor of sorts and there is a need to shape
based on either recipient or sender based on the use case.

Any pointers are appreciated.

Thank you