feat(medusa): Cache modules (#3187)

packages/cache-redis/src/loaders/index.ts

@@ -0,0 +1,38 @@
+import Redis from "ioredis"
+import { asValue } from "awilix"
+import { LoaderOptions } from "@medusajs/modules-sdk"
+
+import { RedisCacheModuleOptions } from "../types"
+
+export default async ({
+  container,
+  logger,
+  options,
+}: LoaderOptions): Promise<void> => {
+  const { redisUrl, redisOptions } = options as RedisCacheModuleOptions
+
+  if (!redisUrl) {
+    throw Error(
+      "No `redisUrl` provided in `cacheService` module options. It is required for the Redis Cache Module."
+    )
+  }
+
+  const connection = new Redis(redisUrl, {
+    // Lazy connect to properly handle connection errors
+    lazyConnect: true,
+    ...(redisOptions ?? {}),
+  })
+
+  try {
+    await connection.connect()
+    logger?.info(`Connection to Redis in module 'cache-redis' established`)
+  } catch (err) {
+    logger?.error(
+      `An error occurred while connecting to Redis in module 'cache-redis': ${err}`
+    )
+  }
+
+  container.register({
+    cacheRedisConnection: asValue(connection),
+  })
+}