按计划将缓存逐出后未使用Spring缓存

Question

I have a repository class as follows:

@EnableCaching
@EnableScheduling
@Repository("dao")
public class CustomerDao implements CustomerDao<Customer> {
    //...

    @Cacheable(value = "customers")
    @Override
    public List<Customer> getAll() {
        LOG.info("in getALL() method");
        return this.jdbcTemplate.query(this.QUERY_ALL_CUSTOMER, new CustomerRowMapper());
    }

    @CacheEvict(value = "customers", allEntries = true)
    @Scheduled(fixedDelay = 60000L)
    public void refreshAllCustomers() {
        LOG.info("Refreshing Customers");
        getAll();
        LOG.info("Refreshing Customers Finished");
    }
}

When I call the api that calls getAll() first time, it takes time as expected. When I call getAll() again, it is fast as result is returned from cache as expected.

However, on schedule, I call the refreshAllCustomers() to clear the cache and re-populate it using getAll() call in which case I expect the result to be cached again.

After the call to refreshAllCustomers() , it seems that any calls to getAll() runs the query and not returning the results from the cache itself.

Any ideas why this is happening? Am I missing a config or not doing something correctly.

Answer 1

@CacheEvict在执行该方法后生效。执行refreshAllCustomers ()方法后，将清除缓存。如果要在执行该方法之前使用@CacheEvict批注使缓存无效，则可以尝试@CacheEvict (value = customers, before Invocation = true)