Carmine appender: better handling when logging unfreezable args (needs Nippy v2.5.1+)

project.clj

@@ -11,6 +11,7 @@
              :1.6  {:dependencies [[org.clojure/clojure "1.6.0-alpha2"]]}
              :dev  {:dependencies [[com.draines/postal        "1.11.1"]
                                    [com.taoensso/carmine      "2.4.0"]
+                                   [com.taoensso/nippy        "2.5.1"] ; nb .1
                                    [org.clojure/tools.logging "0.2.6"]]}
              :test {:dependencies [[expectations "1.4.56"]]}}
   :aliases {"test-all"  ["with-profile" "+test,+1.4:+test,+1.5:+test,+1.6" "expectations"]

src/taoensso/timbre/appenders/carmine.clj

@@ -2,6 +2,7 @@
   "Carmine (Redis) appender. Requires https://github.com/ptaoussanis/carmine."
   {:author "Peter Taoussanis"}
   (:require [taoensso.carmine :as car]
+            [taoensso.nippy   :as nippy]
             [taoensso.timbre  :as timbre]))
 
 (defn- sha48
@@ -58,7 +59,8 @@
 
            (when (> nmax-entries 0)
              (car/wcar conn
-               (car/hset k-hash entry-hash entry)
+               (binding [nippy/*final-freeze-fallback* nippy/freeze-fallback-as-str]
+                 (car/hset k-hash entry-hash entry))
                (car/zadd k-zset udt entry-hash)
 
                (when (< (rand) 0.01) ; Occasionally GC