Spring: Singleton/session scopes and concurrency

Question

Does singleton/session scopes of Spring beans require that access to all its fields must be synchronized? Say through \"synchronized\" keyword or using some classes from package

Answer 1

Only the user for that session can access this class, but ArrayList is not thread-safe, as seen in this discussion: http://forums.sun.com/thread.jspa?threadID=5355402

You need to ensure that your class is fully thread-safe as SessionScoped will just ensure that it is only used by each session, so one session can't access it.

You may want to look at the comments in this discussion for more info: http://wheelersoftware.com/articles/spring-session-scoped-beans.html