Good stuff, The EAT_BURGER seems slightly odd, as i've never hit a situation where I would allow a second one to be fired while the first is still pending. I.E

Good stuff, The EAT_BURGER seems slightly odd, as i've never hit a situation where I would allow a second one to be fired while the first is still pending. I.E. upon EAT_BURGER.start i would disable the UI for the EAT_BURGER action to be fired. I guess that's an idealised world and you've hit something more complicated that requires it though, and the solution is good I particularly like the async call tracking - very simple and neatly solves your issue! Cheers