Re: DataContext cleanup

From: Borut Bolčina (borut.bolcin..mail.com)
Date: Tue Mar 10 2009 - 07:21:32 EDT

  • Next message: Andrey Razumovsky: "Re: DataContext cleanup"

    Hi, just a sanity check:

    I have a this method in my PersistenceManager class:

        public Principal findPrincipalByUsername(String username) {
            DataContext context = DataContext.createDataContext();
            Expression e =
    ExpressionFactory.matchExp(User.USERNAME_PROPERTY, username);
            SelectQuery query = new SelectQuery(User.class, e);
            List users = context.performQuery(query);

            User user = null;
            Principal principal = null;
            if (users.size() > 0) {
                user = (User) users.get(0);
                principal = new Principal();
                principal.setUsername(user.getUsername());
                Profile profile = user.getProfiles().get(0);
                principal.setFirstName(profile.getFirstName());
                principal.setLastName(profile.getLastName());
            }

            return principal;
        }

    Is DataContext (context) garbage collected?

    -Borut

    2007/4/10 Andrus Adamchik <andru..bjectstyle.org>:
    > The context is garbage collected once the context itself and all its objects
    > go out of scope. So make sure you don't retain references to the objects
    > registered in the context and you should be fine.
    >
    > Andrus
    >
    >
    > On Apr 10, 2007, at 11:18 AM, Marc Gabriel-Willem wrote:
    >>
    >> Hi,
    >>
    >>
    >>
    >> In some situation, I'm creating a child data context.
    >>
    >> Is there a good way to clean-up that child data context properly (in
    >> order to facilitate the JVM GC process) when I finished with it ?
    >>
    >>
    >>
    >> Thank you.
    >>
    >> Marc
    >>
    >
    >



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