Re: Help upgrading 3.0.2 code to 4.2.2

One mystery solved: the issue with the SelfProperty was caused by the
involuntary inclusion of an older version of Cayenne by Bootique.
Now I need to find a way to import back Bootique selecting the correct
packages, but being now aware of the issue, I hope I will not get
bitten by it again. =F0=9F=A4=9E

Giulio Cesare

On Sun, Nov 2, 2025 at 9:16=E2=80=AFPM [email protected]
<[email protected]> wrote:
>
> A small update; I am using Cayenne 5.0-M1, but something is going
> wrong with the generated base classes.
> I have this Maven plugin configured to generate the base classes:
>             <plugin>
>                 <groupId>org.apache.cayenne.plugins</groupId>
>                 <artifactId>cayenne-maven-plugin</artifactId>
>                 <version>5.0-M1</version>
>
> Base classes are generated, but they all fail to compile with two
> types of errors:
> - this line of code
>      public static final SelfProperty<Attachment> SELF =3D
> PropertyFactory.createSelf(Attachment.class);
>   fails with the error:
>     incompatible types: no instance(s) of type variable(s) T exist so
> that org.apache.cayenne.exp.property.EntityProperty<T> conforms to
> org.apache.cayenne.exp.property.SelfProperty<com.clipperz.dataModel.Attac=
hment>
>
> - all properties implementation fail using either the
> `beforePropertyRead`, `beforePropertyWrite`, `addToManyTarget`,
> `removeToManyTarget`, =E2=80=A6
>
> The model, opened with the matching version of Cayenne Modeler, does
> not report any issues.
>
> What am I missing?
> Not sure if this is relevant, but as I am already on the leading edge,
> I am also compiling everything with Java 25.
>
> Thanks,
> Giulio Cesare
>
>
> On Tue, Oct 28, 2025 at 5:01=E2=80=AFAM Ricardo Parada <[email protected]=
nvalid> wrote:
> >
> > Hi Giulio,
> >
> > I=E2=80=99m interested to see how it goes. Please report back if you ca=
n.
> >
> > I=E2=80=99ve been playing with 5.0-M1.
> >
> >
> > Thank you
> > Ricardo Parada
> >
> >
> >
> > > On Oct 26, 2025, at 3:22=E2=80=AFPM, [email protected] wrote:
> > >
> > > =EF=BB=BFI just got back to my project, trying to finalize the upgrad=
e, and I
> > > find out there is a brand new version of Cayenne available.
> > > I am going to try to jump directly from 3.0.2 to 5.0-M1. =F0=9F=8E=A2
> > > Wish me luck! =F0=9F=A4=B9
> > >
> > > Giulio Cesare
> > >
> > >> On Sat, Oct 4, 2025 at 10:29=E2=80=AFAM [email protected]
> > >> <[email protected]> wrote:
> > >>
> > >> Thanks Michael,
> > >> I now need to find how to rewire what I was previously doing mostly
> > >> using the org.apache.cayenne.conf package.
> > >> I suppose this is part of the friction I'll have to go through to ge=
t
> > >> a plain Jar (with Jetty).
> > >>
> > >> Thanks for the pointer.
> > >>
> > >> Giulio Cesare
> > >>
> > >>> On Wed, Oct 1, 2025 at 9:16=E2=80=AFPM Michael Gentry <blacknext@gm=
ail.com> wrote:
> > >>>
> > >>> Hi Giulio,
> > >>>
> > >>> In 4.2, you get the ObjectContext from the Cayenne Runtime:
> > >>>
> > >>> https://cayenne.apache.org/docs/4.2/getting-started-guide/#getting-=
started-with-objectcontext
> > >>>
> > >>> mrg
> > >>>
> > >>> On Wed, Oct 1, 2025 at 5:23=E2=80=AFAM [email protected] <
> > >>> [email protected]> wrote:
> > >>>
> > >>>> Hello,
> > >>>> I have been able to fix almost all the warnings and errors.
> > >>>> I have to points that I am not able to fix, though:
> > >>>> - I was still using DataContext (instead of ObjectContext); is thi=
s
> > >>>> still a useful class? Otherwise, how do I create a DataContext, as
> > >>>> `DataContext.createDataContext();` is not defined
> > >>>> - how do I replace the use of ServletUtil.initializeSharedConfigur=
ation?
> > >>>>
> > >>>> Thanks,
> > >>>> Giulio Cesare
> > >>>>
> > >>>> On Tue, Sep 30, 2025 at 3:50=E2=80=AFPM [email protected]
> > >>>> <[email protected]> wrote:
> > >>>>>
> > >>>>> Thanks Andrus!
> > >>>>>
> > >>>>> I'll report on any progress with my upgrade.
> > >>>>>
> > >>>>> Giulio Cesare
> > >>>>>
> > >>>>> On Tue, Sep 30, 2025 at 2:26=E2=80=AFPM Andrus Adamchik <aadamchi=
[email protected]>
> > >>>> wrote:
> > >>>>>>
> > >>>>>> Hi Giulio,
> > >>>>>>
> > >>>>>> SelectQuery is replaced with ObjectSelect. But in your case (a q=
uery
> > >>>> modeled in the DataMap), you would actually use something else - a
> > >>>> MappedSelect query per
> > >>>> https://cayenne.apache.org/docs/4.2/cayenne-guide/#mappedselect-an=
d-mappedexec
> > >>>>>>
> > >>>>>> MappedSelect.query("attachment", Attachment.class)
> > >>>>>>    .param("reference", aReference)
> > >>>>>>    .param("user", anUser)
> > >>>>>>    .select(context);
> > >>>>>>
> > >>>>>> Thanks,
> > >>>>>> Andrus
> > >>>>>>
> > >>>>>>
> > >>>>>>> On Sep 30, 2025, at 3:15=E2=80=AFAM, [email protected] wr=
ote:
> > >>>>>>>
> > >>>>>>> Hello everybody,
> > >>>>>>>
> > >>>>>>> even if this will force me to admit how old I am, I still have =
some
> > >>>>>>> Cayenne 3.0.2 code happily running in production with no issues=
.
> > >>>>>>>
> > >>>>>>> Lately I was trying to upgrade the application from a WAR (runn=
ing in
> > >>>>>>> Tomcat) to a standalone application exposing the servlets via J=
etty,
> > >>>>>>> in order to make the application easier to deploy in a docker
> > >>>>>>> container.
> > >>>>>>>
> > >>>>>>> After some struggle to update the model, I am now facing a LOT =
of
> > >>>>>>> deprecation warnings like this:
> > >>>>>>>> [deprecation] SelectQuery in org.apache.cayenne.query has been
> > >>>> deprecated
> > >>>>>>>
> > >>>>>>> The code I have looks like this:
> > >>>>>>> -------------------
> > >>>>>>> prototypeQuery =3D
> > >>>>>>>
> > >>>> (SelectQuery)dataContext.getEntityResolver().lookupQuery("attachme=
nt");
> > >>>>>>>
> > >>>>>>> parameters =3D new HashMap();
> > >>>>>>> parameters.put("reference", aReference);
> > >>>>>>> parameters.put("user", anUser);
> > >>>>>>> query =3D prototypeQuery.queryWithParameters(parameters);
> > >>>>>>>
> > >>>>>>> result =3D (List<Attachment>)dataContext.performQuery(query);
> > >>>>>>> -------------------
> > >>>>>>>
> > >>>>>>> Unfortunately I never had the opportunity to use any newer vers=
ion of
> > >>>>>>> Cayenne, so I haven't followed along with all the changes that =
it has
> > >>>>>>> gone through.
> > >>>>>>>
> > >>>>>>> Is there anyone willing to suggest me what the above code snipp=
et
> > >>>>>>> would look like with the new version of Cayenne?
> > >>>>>>>
> > >>>>>>> Thanks,
> > >>>>>>>
> > >>>>>>> Giulio Cesare
> > >>>>>>
> > >>>>