fix(caching): properly respect ttl for all cache levels

ts/levelcache.classes.levelcache.ts

@@ -62,6 +62,7 @@ export class LevelCache extends AbstractCache {
   public async storeCacheEntryByKey(keyArg: string, cacheEntryArg: CacheEntry): Promise<void> {
     cacheEntryArg.key = keyArg;
     const targetCache = await this.cacheRouter.getCacheForStoreAction(keyArg, cacheEntryArg);
+    cacheEntryArg.createdAt = Date.now();
     await targetCache.storeCacheEntryByKey(keyArg, cacheEntryArg);
   }
 
@@ -73,6 +74,10 @@ export class LevelCache extends AbstractCache {
     const targetCache = await this.cacheRouter.getCacheForRetrieveAction(keyArg);
     if (targetCache) {
       const cacheEntry = await targetCache.retrieveCacheEntryByKey(keyArg);
+      if (cacheEntry.createdAt + cacheEntry.ttl < Date.now()) {
+        await this.deleteCacheEntryByKey(keyArg).catch();
+        return null;
+      }
       return cacheEntry;
     } else {
       return null;
@@ -87,15 +92,25 @@ export class LevelCache extends AbstractCache {
     ]);
   }
 
-  // cache maintenance
-  /**
-   * cleans the cache
-   */
-  public async clean(): Promise<void> {
+  public async deleteCacheEntryByKey(keyArg) {
     await Promise.all([
-      this.cacheDiskManager.clean(),
-      this.cacheDiskManager.clean(),
-      this.cacheS3Manager.clean(),
+      this.cacheMemoryManager.deleteCacheEntryByKey(keyArg),
+      this.cacheDiskManager.deleteCacheEntryByKey(keyArg),
+      this.cacheS3Manager.deleteCacheEntryByKey(keyArg),
+    ]);
+  }
+
+  // cache maintenance
+  public async cleanOutdated() {}
+
+  /**
+   * cleans the complete cache
+   */
+  public async cleanAll(): Promise<void> {
+    await Promise.all([
+      this.cacheDiskManager.cleanAll(),
+      this.cacheDiskManager.cleanAll(),
+      this.cacheS3Manager.cleanAll(),
     ]);
   }
 }