From 3688f1dadf8e5f5601700a167ca4aa9514d71469 Mon Sep 17 00:00:00 2001
From: Hazel K <acomputerdog@gmail.com>
Date: Sat, 3 Aug 2024 14:09:08 -0400
Subject: [PATCH] implement pull-through caching

---
 packages/backend/src/misc/cache.ts | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/packages/backend/src/misc/cache.ts b/packages/backend/src/misc/cache.ts
index 68397e1563..fc98ce8132 100644
--- a/packages/backend/src/misc/cache.ts
+++ b/packages/backend/src/misc/cache.ts
@@ -55,7 +55,13 @@ export class RedisKVCache<T> {
 
 		const cached = await this.redisClient.get(`kvcache:${this.name}:${key}`);
 		if (cached == null) return undefined;
-		return this.fromRedisConverter(cached);
+
+		const value = this.fromRedisConverter(cached);
+		if (value !== undefined) {
+			this.memoryCache.set(key, value);
+		}
+
+		return value;
 	}
 
 	@bindThis
@@ -149,7 +155,13 @@ export class RedisSingleCache<T> {
 
 		const cached = await this.redisClient.get(`singlecache:${this.name}`);
 		if (cached == null) return undefined;
-		return this.fromRedisConverter(cached);
+
+		const value = this.fromRedisConverter(cached);
+		if (value !== undefined) {
+			this.memoryCache.set(value);
+		}
+
+		return value;
 	}
 
 	@bindThis