From 77feba43eb03eb5201ef77a3606178533390e579 Mon Sep 17 00:00:00 2001
From: Duell10111 <duell10111@t-online.de>
Date: Tue, 26 Jan 2021 15:33:11 +0100
Subject: [PATCH 1/2] Added PruneCallback to cache.ts

---
 src/cache.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/cache.ts b/src/cache.ts
index 3f7153a..a8d0c15 100644
--- a/src/cache.ts
+++ b/src/cache.ts
@@ -3,6 +3,7 @@ export interface ICacheOptions {
     backend: any;
     namespace: string;
     policy: ICachePolicy;
+    prunecallback? : ((keys : string[]) => void);
 }
 
 export interface ICachePolicy {
@@ -14,11 +15,13 @@ export default class Cache {
     protected backend: any;
     protected namespace: string;
     protected policy: ICachePolicy;
+    protected prunecallback? : ((keys : string[]) => void);
 
     constructor(options: ICacheOptions) {
         this.namespace = options.namespace;
         this.backend = options.backend;
         this.policy = options.policy;
+        this.prunecallback = options.prunecallback;
         let ttl = this.policy.stdTTL;
         if (!ttl || typeof(ttl) !== 'number') {
             ttl = 0;
@@ -53,6 +56,10 @@ export default class Cache {
 
         await Promise.all(removePromises);
 
+        if(this.prunecallback !== undefined){
+            this.prunecallback(victimList);
+        }
+
         const survivorList = lru.slice(victimCount);
         return this.setLRU(survivorList);
     }

From 69c001280ddf434bee8eecd2ddb21e4fecebe08e Mon Sep 17 00:00:00 2001
From: Duell10111 <duell10111@t-online.de>
Date: Wed, 27 Jan 2021 00:42:03 +0100
Subject: [PATCH 2/2] Changed to call callback only when victimlist is not
 empty

---
 src/cache.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cache.ts b/src/cache.ts
index a8d0c15..41831e6 100644
--- a/src/cache.ts
+++ b/src/cache.ts
@@ -56,7 +56,7 @@ export default class Cache {
 
         await Promise.all(removePromises);
 
-        if(this.prunecallback !== undefined){
+        if(this.prunecallback !== undefined && victimList.length > 0){
             this.prunecallback(victimList);
         }