Using 'watch' to maintain a cache

[cameronelliott]

It seems like this should be straight forward, but I haven't found it explained anywhere.

I want to use 'watch' to maintain a local in-memory cache of a prefix matched range of key values.

Let's say the prefix is '' for everything for simplicities sake.

I want my cache to contain: the current set of all key vals PLUS receive updates using watch.

Is the best way to do this, these two operations:

1. start a watch on a prefix match.
2. do a get on a prefix match
   (this order is important for race condition reasons)

Using a watch with revision = 1 does not seem a good option for obvious reasons.

Thanks for any feedback.