refactored watcher; produces logs

cache.js

@@ -0,0 +1,19 @@
+// implement a cluster-wide cache which is in-memory for each instance
+
+export class Cache {
+
+    constructor(name) {
+        this.name = name
+        this.cache = {}
+    }
+
+    async get(key) {
+        return this.cache[key]
+    }
+
+    async set(key, value) {
+        this.cache[key] = value
+        // todo broadcast
+    }
+}
+