ring-nexus-middleware.core — com.ovistoica/ring-nexus-middleware 2025.07.15

prepare-nexus clj

(prepare-nexus nexus request respond raise)

wrap-nexus clj

(wrap-nexus handler
            {:keys [nexus/system->state] :as nexus}
            system
            &
            [{:ring-nexus-middleware.core/keys [state-k]
              :or {state-k :ring-nexus/state}}])

Given a nexus config map and a live system, wrap nexus action dispatch to provide FCIS (Functional Core Imperative Shell) support.

Parameters:

handler - The handler on which to wrap

nexus - The nexus config map. See https://github.com/cjohansen/nexus for more info on what the nexus map requires

system - The live system that will be passed to nexus. Can be an atom, a DB connection, a map containing multiple atoms, datomic connections or any link to a live system. N.B. nexus requires a :nexus/system->state functon that transforms the system into a immutable state snapshot. wrap-nexus will use nexus/system->state to add a snapshot of the state to the ring request

optional config - Last parameter is an optional config map ::state-k - the key on which to put the state snapshot