[mongrel2] Tying two servers together via 0MQ?

[Travis Spencer]

Hi All,

I'm wondering if it is possible to tie two Mongrel2 servers together
and pass data between their handlers using 0MQ. To do this, I thought
that the front-end server should use a handler which sent messages to
the port that the back-end server's handler was receiving on.
Basically like this:

front_end = Server(
  ...
  hosts = [
    Host(name = "...",
      routes = {
        "/" : Handler(
          ...,
          send_spec = "tcp://127.0.0.1:9997",
          recv_ident = "tcp://127.0.0.1:9996")
      }
    )
  ]
)
back_end = Server(
  ...
  hosts = [
    Host(name = "...",
      routes = {
        "/" : Handler(
          ...,
          send_spec = "tcp://127.0.0.1:9996",
          recv_spec = "tcp://127.0.0.1:9997")
      }
    )
  ]
)

This would result in a flow like this, I had hoped:

<-> [Front-end Mongrel2 server] <-> 0MQ <-> [Back-end Mongrel2 server] <->

However, when I start the second server, it can't bind to its
send_spec because the first server already grabbed it as it's
recv_spec.

So, my question are these:

1. Is there a better way to do this, in general?
2. If this is the way to do it, what details am I missing to be able
to send data between these two servers?

TIA!


-- 

Regards,

Travis Spencer