simple-spring-memcached 升级到 4.1.1 导致 WrappedCacheException答案

【问题标题】：simple-spring-memcached upgrade to 4.1.1 causing WrappedCacheExceptionsimple-spring-memcached 升级到 4.1.1 导致 WrappedCacheException
【发布时间】：2019-04-23 17:05:39
【问题描述】：

我最近将 simple-spring-memcached 从版本 3.6.1 升级到了 4.1.1。但是，在此版本升级后，每当我的代码尝试从缓存中获取值时，我都会收到 WrappedCacheException。我在下面分享我的代码 sn-p：

@Transactional
@Cacheable(value = CACHE_NAME, key = "#id")
@Override
public TicketModel validate(final String id) {
    TicketEntity ticketEntity = ticketEntityRepository.findOne(id);
    if (ticketEntity == null) {
        System.out.println("Ticket not found")
    }
    return something;
}

我的 cacheManager bean 看起来像：

@Bean
public CacheManager cacheManager() throws Exception {
    List<SSMCache> cacheList = new ArrayList<>();

    CacheFactory cacheFactory;
    if (ELASTIC_CACHE_FACTORY.equals(cacheBean)) {
        cacheFactory = elastiCacheFactory();
    } else {
        cacheFactory = memCacheFactory();
    }

    Cache cache = cacheFactory.getObject();

    SSMCache aamCache = new SSMCache(cache, cacheTimeout, true);
    cacheList.add(aamCache);

    SSMCacheManager cacheManager = new SSMCacheManager();
    cacheManager.setCaches(cacheList);
    cacheManager.afterPropertiesSet();
    return cacheManager;
}

我得到的确切异常如下所示：

    SEVERE: Servlet.service() for servlet [jersey-servlet] in context with path [/user-service-web] threw exception [com.google.code.ssm.spring.WrappedCacheException] with root cause
com.google.code.ssm.spring.WrappedCacheException
    at com.google.code.ssm.spring.SSMCache.logOrThrow(SSMCache.java:318)
    at com.google.code.ssm.spring.SSMCache.getValue(SSMCache.java:285)
    at com.google.code.ssm.spring.SSMCache.get(SSMCache.java:117)
    at org.springframework.cache.interceptor.AbstractCacheInvoker.doGet(AbstractCacheInvoker.java:68)
    at org.springframework.cache.interceptor.CacheAspectSupport.findInCaches(CacheAspectSupport.java:469)
    at org.springframework.cache.interceptor.CacheAspectSupport.findCachedItem(CacheAspectSupport.java:435)
    at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:336)
    at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:302)
    at org.springframework.cache.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:61)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:655)

每当调用 findOne(id) 方法时，我都会收到 WrappedCacheException 并且代码会失败。请帮忙。

【问题讨论】：

标签： java spring caching memcached

【解决方案1】：

在 4.0.0 之前，从底层缓存/客户端层抛出的异常（例如 IOExceptions 等）会被 SsmCache 对象吃掉。在 4.0.0 之后，默认情况下，这些都被抛出给调用者。您可以通过在 SsmCache bean 上将“muteExceptions”标志设置为 true 来恢复之前的行为。

【讨论】：