Does tomcat spring beans need to worry about concurrency?

Question

It's not entirely clear about Java, do I have to worry about compatibility issues when listing and swapping DTO objects in my spring java beans in one tomcat server application?

Answer 1

In short, yes. Spring Beans can often be used by multiple threads. Pay particular attention to member variables in the Spring Bean. If they are mutable, either make them immutable, or coordinate access using locks (for example, with synchronization), ThreadLocal, etc.

Answer 2

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