Create Cache

src/graphql/models/groupModel.ts

@@ -12,6 +12,7 @@ import { User } from "../object_resolvers/users";
 import knex from "../../../db/knex_router"
 import { GroupCollection, GroupSet, Tools } from "../../utils/tools";
 import { createSubgroupArgs, editGroupArgs } from "../typeDefs/queries";
+import {Cache} from "../../utils/cache";
 
 export class GroupModel {
 
@@ -28,6 +29,8 @@ export class GroupModel {
 
     protected contextUser: string;
 
+    protected cache: Cache<Group, string>;
+
     /**
      * @memberof GraphQL.GroupModel#
      * @function getGroup

src/utils/cache.ts

+/**
+ * @file Fonctions et classes de cache
+ * @author hadi
+ * @namespace cache
+ */
+
+
+export class Cache<A, K> {
+    /**
+     * @memberof cache
+     * @class Cache
+     * @summary Permet le caching d'une classe A référencée par des keys K
+     */
+
+
+    instances = new Map<K, A>();
+    aConstructor: new (k: K) => A;
+
+
+    constructor(aConstructor: new (k: K) => A) {
+        this.aConstructor = aConstructor;
+    }
+
+    get(k: K){
+        if (this.instances.has(k))
+            return this.instances.get(k);
+        else {
+            const a = new this.aConstructor(k);
+            this.instances.set(k, a);
+            return a;
+        }
+    }
+}
+