How to count relations?

[fengxia]

Hi Juju,

I'm building two charms and linking them with one relation, one charm 
("A") will provide and the other ("B") will require.

The deployment will have one "A" and three "B"s. How do I know all three 
Bs have joined? I'm thinking to use a counter in A's relation, then at 
relation-joined hook by B to add this counter. But set_remote() and 
set_local() didn't work. Not sure what's the right way to achieve this?


-- 
Feng xia
Engineer
Lenovo USA

Phone: 5088011794
fxia1 at lenovo.com
  	
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