Sebastien Tardif In regards to your idea of a "batch initialize collections" feature, can you propose an API for what that might look like?

Are these all collections of the same role? Or a mix-bag?

Do we need to allow configuring how this happens like we are proposing with this "entity multi-load" API? Or is it a more simple "here are a number of collections, please just get them initialized"?

We could follow the approach being taken for "entity multi-load":

public interface CollectionInitializerAccess {
    // possibly LockMode, etc...

    // allow setting batch size possibly...

    void initialize(Object... collections);
    void initialize(Collection collections);
}

Unfortunately Map and the others not sharing a common interface makes that API a bit awkward in terms of the arguments. Possibly we could say...

public interface CollectionInitializerAccess {
    // possibly LockMode, etc...

    // allow setting batch size possibly...

    void initialize(Map... maps);
    void initialize(Collection<Map> maps);

    void initialize(Collection... collections);
    void initialize(Collection<Collection> collections);
}

WDYT? Or do you have an alternative suggestion?