添加热点缓存

common/pom.xml

@@ -45,6 +45,15 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-redis</artifactId>
         </dependency>
+        <!-- Spring Cache 抽象 + Caffeine 本地缓存，用于热门榜单等全局只读数据 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-cache</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.github.ben-manes.caffeine</groupId>
+            <artifactId>caffeine</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.redisson</groupId>
             <artifactId>redisson-spring-boot-starter</artifactId>

common/src/main/java/org/jiayunet/config/CacheConfig.java

@@ -0,0 +1,69 @@
+package org.jiayunet.config;
+
+import com.github.benmanes.caffeine.cache.Cache;
+import com.github.benmanes.caffeine.cache.Caffeine;
+import org.springframework.cache.CacheManager;
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.cache.caffeine.CaffeineCacheManager;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * 本地缓存配置
+ * <p>基于 Caffeine 的 Spring Cache 实现，用于热门榜单等全局只读、变化慢、允许短时陈旧的数据</p>
+ * <p>每个缓存独立注册、独立过期时间，调整某个缓存的时长直接改注册时传入的分钟数，互不影响</p>
+ *
+ * @author zk
+ */
+@Configuration
+@EnableCaching
+public class CacheConfig {
+
+    /** 缓存名：热门行业 */
+    public static final String HOT_INDUSTRY = "hotIndustry";
+
+    /** 缓存名：热门岗位类型 */
+    public static final String HOT_JOB_CATEGORY = "hotJobCategory";
+
+    /** 缓存名：热门城市 */
+    public static final String HOT_CITY = "hotCity";
+
+    /** 单个缓存最大条目数 */
+    private static final long MAX_SIZE = 100;
+
+    /**
+     * 缓存管理器
+     * <p>三个热门榜单各注册一份独立的 Caffeine 实例，过期时间互相独立（单位：分钟）</p>
+     * <p>另设一份兜底策略：业务里如果用了未登记的缓存名，动态创建时同样带过期时间，不会永不过期</p>
+     */
+    @Bean
+    public CacheManager cacheManager() {
+        CaffeineCacheManager cacheManager = new CaffeineCacheManager();
+
+        // 兜底策略（动态创建未登记缓存时生效）
+        cacheManager.setCaffeine(Caffeine.newBuilder()
+                .expireAfterWrite(30, TimeUnit.MINUTES)
+                .maximumSize(MAX_SIZE));
+
+        // 各缓存独立注册，独立过期时间
+        cacheManager.registerCustomCache(HOT_INDUSTRY, buildCache(60));
+        cacheManager.registerCustomCache(HOT_JOB_CATEGORY, buildCache(60));
+        cacheManager.registerCustomCache(HOT_CITY, buildCache(60));
+
+        return cacheManager;
+    }
+
+    /**
+     * 构建一个指定过期时长的 Caffeine 缓存实例
+     *
+     * @param expireMinutes 写入后过期时长（分钟）
+     */
+    private Cache<Object, Object> buildCache(long expireMinutes) {
+        return Caffeine.newBuilder()
+                .expireAfterWrite(expireMinutes, TimeUnit.MINUTES)
+                .maximumSize(MAX_SIZE)
+                .build();
+    }
+}