I agree, Emily, we should make carefully considered use of
deprecation for removal, just like the JDK.
And like the JDK, I think
we should consider defining an "incubation" process for APIs that
are added to Jakarta EE. We could reserve the namespace
org.eclipse.ee4j.incubating (or something similar, but not something
starting with jakarta.*) for APIs that want to be part of the
platform but aren't quite "cooked" enough yet. Every Jakarta EE
implementation would be required to include them, as a way of
encouraging feedback from users.
(And we should work with the OpenJDK project to ensure that Jakarta
EE incubating modules can have the same compile time and run time
characteristics as JDK incubating modules.)
This is just my opinion, since we have yet to address this issue in
the platform project team, which should set the direction in this
area. But discussions such as this will provide useful input to the
platform project.
Emily Jiang wrote on 2/18/20 1:20 PM:
When we discussed MicroProfile and Jakarta technical
alignment, we assumed Jakarta EE does not allow backward
incompatible changes. However, I have not seen it is noted
anywhere, so I took the liberty to get some clarification.
It seems at least for Jakarta EE10, backward incompatible
changes are not allowed. In the future, maybe a model of first
deprecating and then removal can be adopted. Is this a fair
assumption?
Emily
I rather agree. Backwards compatibility is
probably a very common expectation from Jakarta EE given
its Java EE pegidree. Suddenly changing that may scare
people off. I think this is a topic that could be
revisited once Jakarta EE establishes itself.
Stupid question: Is this a purely
theoretical exercise or is there some urgent need to
discuss this? Isn't this the flexibility MicroProfile is
supposed to be providing anyway?
Reza Rahman
Jakarta EE Ambassador, Author, Blogger,
Speaker
Please note views expressed here are my own
as an individual community member and do not reflect the
views of my employer.
Sent
via the Samsung Galaxy S7, an AT&T 4G LTE smartphone
-------- Original message --------
Date: 2/18/20 3:23 PM (GMT-05:00)
Subject: Re: [jakarta.ee-community] Is backward
incompatibility change allowed in Jakarta EE?
backward incompatible changes should be
avoided, because Jakarta EE is just as Java EE about a
stable set of APIs.
I guess that through the process of deprecation, one
can 'schedule' the removal of a limited set of methods
and classes in the long term.
IMO, backward compatibility is a critical
value proposition that Java EE/Jakarta EE provides. I
don't see changing this as innovative, but rather the
road to ruin.
A key pro for me is that your apps do not break
with new versions of Jakarta EE.
In Java EE time, backward
incompatible changes are not allowed. I am
wondering whether Jakarta EE still carries this
requirement or to be a little of more innovative
and then allows backward incompatible changes.
There are cons/pros for either option. Thoughts?
p.s. namespace changes are one exceptional. I
am looking at Jakarta EE10 and above releases.
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