You may need to initialize your own connection pool and set it into the
configuration, in order to have a reference to it later.
AHC's current master is very different from their stable branch, so if
you want to poke around the source be sure to check out tag
async-http-client-1.8.8, the version used in Dispatch 0.11.1. I think
what you want to do is very much possible with a little customization,
though I haven't done it myself. I spend my AHC customization energies
making it possible to exit sbt scala console without ceremony. :\
Nathan