Gary - if we have a ticket to upgrade DBCP to java 11, I can take it up.

> On Dec 17, 2022, at 1:09 PM, Richard Zowalla <rich...@zowalla.com> wrote:
> 
> Sure. Sounds like a plan :)
> 
> Am 17. Dezember 2022 22:06:48 MEZ schrieb Gary Gregory 
> <garydgreg...@gmail.com>:
>> I think we should wait for a little while: I'd want to release current code
>> from git for Commons Pool, then DBCP (which sits on top of Pool), make sure
>> all is well, then see about going to DBCP 3, on Java 8 for now but
>> considering Java 11 maybe. Do consider that the Commons community is small
>> and I would not want to support concurrent support and releases on bothe
>> DBCP 2 and 3.
>> 
>> Gary
>> 
>> Gary
>> 
>>> On Sat, Dec 17, 2022, 14:12 Richard Zowalla <r...@apache.org> wrote:
>>> 
>>> For DBCP, it basically boils down to
>>> 
>>> BasicManagedDataSource.java
>>> DataSourceXAConnectionFactory.java
>>> LocalXAConnectionFactory.java
>>> SynchronizationAdapter.java
>>> TransactionContext.java
>>> TransactionRegistry.java
>>> 
>>> Looking at these classes, the move to jakarta definitley affects binary
>>> compatibility as we have changes in return types / arguments of public
>>> methods. Given that it breaks binary compatibility, we could even
>>> increase the java level to 11 and drop deprecated things in a potential
>>> dbcp 3.
>>> 
>>> In the end, I am happy with everything, which brings DBCP into the
>>> Jakarta world ;)
>>> 
>>> If we have consensus for a route, I am happy to work on it / make it
>>> happen via related PRs but would need some guideance on the best way to
>>> move forward.
>>> 
>>> Gruß
>>> Richard
>>> 
>>> Am Freitag, dem 16.12.2022 um 20:56 +0100 schrieb Romain Manni-Bucau:
>>>> If not done in new classes (both can live in the same lib
>>>> technically),
>>>> sadly yes.
>>>> 
>>>> Le ven. 16 déc. 2022 à 20:14, Richard Zowalla <rich...@zowalla.com> a
>>>> écrit :
>>>> 
>>>>> Thanks for your replies.
>>>>> 
>>>>> I guess, that switching the namespace leads to binary
>>>>> incompatibility (If
>>>>> I take the definition from [1]). I cannot drop it in a running JVM
>>>>> / app
>>>>> and expect no issues with it as the related APIs are breaking
>>>>> namespace
>>>>> changes (at least at runtime if they aren't present) :-)
>>>>> 
>>>>> Aside from that fact, method signatures might also change from
>>>>> javax ->
>>>>> jakarta, which would require a short investigation and usage of the
>>>>> existing tooling to see if this happens.
>>>>> 
>>>>> From a commons point of view that would mean to go for dbcp3,
>>>>> right?
>>>>> 
>>>>> Gruß
>>>>> Richard
>>>>> 
>>>>> [1]
>>>>> 
>>> https://garygregory.wordpress.com/2020/06/14/how-we-handle-binary-compatibility-at-apache-commons/
>>>>> 
>>>>> Am 16. Dezember 2022 15:53:53 MEZ schrieb Mark Thomas
>>>>> <ma...@apache.org>:
>>>>>> On 16/12/2022 13:24, Gary Gregory wrote:
>>>>>>> Thank you Richard for starting this thread.
>>>>>>> 
>>>>>>> My view is simpler perhaps: I would not make this about the
>>>>>>> javax vs
>>>>>>> Jakarta namespaces.
>>>>>>> 
>>>>>>> I don't want to double the numbers of jars we produce from the
>>>>>>> same
>>>>> branch
>>>>>>> for affected components as one of the scheme proposed. It feels
>>>>>>> like a
>>>>>>> burden to maintenance moving forward and a very brittle process
>>>>>>> with
>>>>> some
>>>>>>> unforeseen side effects.
>>>>>>> 
>>>>>>> This is just a code change IMO. For a given component, either
>>>>>>> it is
>>>>> binary
>>>>>>> compatible, or it is not. You don't know until you try it and
>>>>>>> see if
>>>>> public
>>>>>>> and protected elements break, using our existing configuration
>>>>>>> of Maven
>>>>> and
>>>>>>> japicmp (or revapi).
>>>>>>> 
>>>>>>> If it is binary compatible, then let's consider making the
>>>>>>> change. If
>>>>> not,
>>>>>>> then do it in a major version, where the previous major version
>>>>>>> is
>>>>>>> maintained as we do now, as need be.
>>>>>>> 
>>>>>>> A new major version also benefits from the usual dropping of
>>>>>>> deprecated
>>>>>>> elements and making any other changes with seem reasonable.
>>>>>> 
>>>>>> +1. I don't see this as any different to increasing the minimum
>>>>>> version
>>>>> of Java and supported new JDBC methods.
>>>>>> 
>>>>>> Mark
>>>>>> 
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>>>>>> 
>>>>> 
>>> 
>>> 
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