Add configuration cache

Problem Context

Loading configuration from external service is slow. We want to cache it and only load once.

Advanced
200 points

File Changes (1)

src/main/java/com/example/config/ConfigurationCache.java ADDED
@@ -0 +1 @@
1 +package com.example.config;
2 +
3 +import org.springframework.stereotype.Component;
4 +
5 +@Component
6 +public class ConfigurationCache {
7 +
8 + private final ConfigurationService configService;
9 + private AppConfiguration cachedConfig;
10 +
11 + public ConfigurationCache(ConfigurationService configService) {
12 + this.configService = configService;
13 + }
14 +
15 + public AppConfiguration getConfiguration() {
16 + if (cachedConfig == null) {
17 + // Load from external service (expensive operation)
18 + cachedConfig = configService.loadFromExternalService();
19 + }
20 + return cachedConfig;
21 + }
22 +
23 + public void refreshConfiguration() {
24 + cachedConfig = null;
25 + }
26 +}
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