如果我的值存储在“线程安全”映射中，那么该值是否需要为ThreadLocal？

Question

I'm storing objects in a ThreadLocal Map ( implemented in spring-tx)

class TransactionSynchronizationManager ...

private static final ThreadLocal<Map<Object, Object>> resources =
        new NamedThreadLocal<Map<Object, Object>>("Transactional resources");

if the Map is ThreadLocal and properly accessed (again all spring-tx code), do the values I store in the map have to be ThreadLocal to be thread safe?

Answer 1

Assuming you haven't inadvertently passed the Map to another thread by some other means, the Map does not need any additional protection, because all usage of it will be single-threaded. Likewise, as long as any Objects in the Map are not inadvertently passed to other threads by other means, those Objects do not need any additional protection.