Multiple threads calling the @Cacheable method. Spring cache (3.2.6) is allowing all threads into the method

Question

I have a DAO object with a method of the following type. I have injected the DAO into service layer and I'm able to get cached results from this DAO method call. But when multiple threads invoke this method (on a proxy that wraps the DAO singleton) some of those threads still going to fetch the data from my database i.e., the fetchDataFromDb() method call is still executed. Is there a way to get around this? Is this a Spring caching bug?

    @Override
    @Cacheable(value = "CacheName")
    public Map<String, DomainObject> fetchDataFromDb() {
    ....
    }

Following XML configuration of my Spring application context file. This is a web application. I simulated the multiple threads using JMeter.

<cache:annotation-driven />


<!-- generic cache manager -->
<bean id="cacheManager" class="org.springframework.cache.support.SimpleCacheManager">
    <property name="caches">
        <set>
            <bean class="org.springframework.cache.concurrent.ConcurrentMapCacheFactoryBean" p:name="CacheName" />              
        </set>
    </property>
</bean>

Answer 1

what you want is @Cacheable(sync = true)