⚡ Add performance improvements on schema validation system

common/src/app/common/schema.cljc

@@ -16,7 +16,7 @@
    [app.common.schema.registry :as sr]
    [app.common.uri :as u]
    [app.common.uuid :as uuid]
-   [clojure.test.check.generators :as tgen]
+   [clojure.core :as c]
    [cuerdas.core :as str]
    [malli.core :as m]
    [malli.dev.pretty :as mdp]
@@ -26,7 +26,12 @@
    [malli.transform :as mt]
    [malli.util :as mu]))
 
-(defprotocol ISchemaOps
+(defprotocol ILazySchema
+  (-get-schema [_])
+  (-get-validator [_])
+  (-get-explainer [_])
+  (-get-decoder [_])
+  (-get-encoder [_])
   (-validate [_ o])
   (-explain [_ o])
   (-decode [_ o]))
@@ -34,21 +39,31 @@
 (def default-options
   {:registry sr/default-registry})
 
-(defn explain
-  [s value]
-  (m/explain s value default-options))
-
 (defn schema?
   [o]
   (m/schema? o))
 
+(defn lazy-schema?
+  [s]
+  (satisfies? ILazySchema s))
+
 (defn schema
   [s]
-  (m/schema s default-options))
+  (if (lazy-schema? s)
+    (-get-schema s)
+    (m/schema s default-options)))
 
 (defn validate
   [s value]
-  (m/validate s value default-options))
+  (if (lazy-schema? s)
+    (-validate s value)
+    (m/validate s value default-options)))
+
+(defn explain
+  [s value]
+  (if (lazy-schema? s)
+    (-explain s value)
+    (m/explain s value default-options)))
 
 (defn humanize
   [exp]
@@ -113,11 +128,15 @@
 
 (defn validator
   [s]
-  (-> s schema m/validator))
+  (if (lazy-schema? s)
+    (-get-validator s)
+    (-> s schema m/validator)))
 
 (defn explainer
   [s]
-  (-> s schema m/explainer))
+  (if (lazy-schema? s)
+    (-get-explainer s)
+    (-> s schema m/explainer)))
 
 (defn encode
   ([s val transformer]
@@ -131,7 +150,21 @@
   ([s val options transformer]
    (m/decode s val options transformer)))
 
+(defn encoder
+  ([s]
+   (if (lazy-schema? s)
+     (-get-decoder s)
+     (encoder s default-options default-transformer)))
+  ([s transformer]
+   (m/encoder s default-options transformer))
+  ([s options transformer]
+   (m/encoder s options transformer)))
+
 (defn decoder
+  ([s]
+   (if (lazy-schema? s)
+     (-get-decoder s)
+     (decoder s default-options default-transformer)))
   ([s transformer]
    (m/decoder s default-options transformer))
   ([s options transformer]
@@ -201,10 +234,8 @@
   ([s] (lookup sr/default-registry s))
   ([registry s] (schema (mr/schema registry s))))
 
-(declare define)
-
 (defn fast-check!
-  "A fast path for checking process, assumes the ISchemaOps protocol
+  "A fast path for checking process, assumes the ILazySchema protocol
   implemented on the provided `s` schema. Sould not be used directly."
   [s value]
   (when-not ^boolean (-validate s value)
@@ -216,10 +247,12 @@
                             ::explain explain}))))
   true)
 
+(declare define)
+
 (defn check-fn
   "Create a predefined check function"
   [s]
-  (let [schema (if (satisfies? ISchemaOps s) s (define s))]
+  (let [schema (if (lazy-schema? s) s (define s))]
     (partial fast-check! schema)))
 
 (defn check!
@@ -227,7 +260,7 @@
   schema over provided data. Raises an assertion exception, should be
   used together with `dm/assert!` or `dm/verify!`."
   [s value]
-  (if (satisfies? ISchemaOps s)
+  (if (lazy-schema? s)
     (fast-check! s value)
     (do
       (when-not ^boolean (m/validate s value default-options)
@@ -241,7 +274,7 @@
 
 
 (defn fast-validate!
-  "A fast path for validation process, assumes the ISchemaOps protocol
+  "A fast path for validation process, assumes the ILazySchema protocol
   implemented on the provided `s` schema. Sould not be used directly."
   ([s value] (fast-validate! s value nil))
   ([s value options]
@@ -257,14 +290,14 @@
 (defn validate-fn
   "Create a predefined validate function"
   [s]
-  (let [schema (if (satisfies? ISchemaOps s) s (define s))]
+  (let [schema (if (lazy-schema? s) s (define s))]
     (partial fast-validate! schema)))
 
 (defn validate!
   "A generic validation function for predefined schemas."
   ([s value] (validate! s value nil))
   ([s value options]
-   (if (satisfies? ISchemaOps s)
+   (if (lazy-schema? s)
      (fast-validate! s value options)
      (when-not ^boolean (m/validate s value default-options)
        (let [explain (explain s value)
@@ -277,7 +310,7 @@
 
 (defn conform!
   [schema value]
-  (assert (satisfies? ISchemaOps schema) "expected `schema` to satisfy ISchemaOps protocol")
+  (assert (lazy-schema? schema) "expected `schema` to satisfy ILazySchema protocol")
   (let [params (-decode schema value)]
     (fast-validate! schema params nil)
     params))
@@ -295,11 +328,16 @@
   nil)
 
 (defn define
-  [s]
+  "Create ans instance of ILazySchema"
+  [s & {:keys [transformer] :as options}]
   (let [schema      (delay (schema s))
-        validator (delay (validator @schema))
-        explainer (delay (explainer @schema))
-        decoder   (delay (decoder @schema default-transformer))]
+        validator   (delay (m/validator @schema))
+        explainer   (delay (m/explainer @schema))
+
+        options     (c/merge default-options (dissoc options :transformer))
+        transformer (or transformer default-transformer)
+        decoder     (delay (m/decoder @schema options transformer))
+        encoder     (delay (m/encoder @schema options transformer))]
 
     (reify
       m/AST
@@ -341,7 +379,17 @@
       (-form [_]
         (m/-form @schema))
 
-      ISchemaOps
+      ILazySchema
+      (-get-schema [_]
+        @schema)
+      (-get-validator [_]
+        @validator)
+      (-get-explainer [_]
+        @explainer)
+      (-get-encoder [_]
+        @encoder)
+      (-get-decoder [_]
+        @decoder)
       (-validate [_ o]
         (@validator o))
       (-explain [_ o]
@@ -349,18 +397,6 @@
       (-decode [_ o]
         (@decoder o)))))
 
-;; --- GENERATORS
-
-;; FIXME: replace with sg/subseq
-(defn gen-set-from-choices
-  [choices]
-  (->> tgen/nat
-       (tgen/fmap (fn [i]
-                    (into #{}
-                          (map (fn [_] (rand-nth choices)))
-                          (range i))))))
-
-
 ;; --- BUILTIN SCHEMAS
 
 (define! :merge (mu/-merge))