Can you change this (should be less code) to use the proxy pattern in #202 ?

for instance, close was not plumbed through here.

yea. that's the reason it's useful. All delegation is handled for you so you don't forget things. Like closing a network connection cleanly!

you could probably do

def onMergeFailure(rescueException: Throwable => Unit): MergeableStore[K, V] =
  new MergeableStoreProxy(store) {
    override def merge(kv: (K, V)) = self.merge(kv).onFailure(rescueException)
    override def multiMerge[K1 <: K](kvs: Map[K1, V]) =
      self.multiMerge(kvs).mapValues { _.onFailure(rescueException) }
  }

shorter and safer

@singhala ? Any update? Can we talk you into using the pattern above?

ping

Sorry I lost track of this while on vacation. Yes, I'll update this diff with the new pattern later today.