我的配置：

@Bean
public CaffeineCacheManager cacheManager() {
    return new CaffeineCacheManager();
}
@Bean
public CaffeineCache testCache() {
    return new CaffeineCache("test_cache",
            Caffeine.newBuilder()
                    .maximumSize(10000)
                    .expireAfterAccess(30, TimeUnit.SECONDS)
                    .expireAfterWrite(30, TimeUnit.SECONDS)
                    .recordStats()
                    .build());
}

测试代码：（连续读取缓存3次，每次读取之间暂停45秒）

static int value = 1;
    ...
    Cache testCache = cacheManager.getCache("test_cache");
    System.out.println("read " + testCache.get("myKey", () -> value++));
    try {
        Thread.sleep(45000);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    System.out.println("read " + testCache.get("myKey", () -> value++));
    try {
        Thread.sleep(45000);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    System.out.println("read " + testCache.get("myKey", () -> value++));

实际结果：

read 1
read 1
read 1

预期结果：缓存在30秒后被逐出：

read 1
read 2
read 3

我错了什么？
如何修复？