Re: M3 feature preview

As a Cayenne user, the majority of my apps in the last 25 years were =
"autoCommit=3Dfalse" just because that's how the framework worked. So =
this is also new to me and based on research, not production experience. =
So I'd very much like to get community feedback on the actual behavior =
and potential pitfalls.=20

Andrus


> On Jul 11, 2026, at 4:52=E2=80=AFAM, [email protected] wrote:
>=20
> Hello Andrus,
>=20
>> But this means that for the first time Cayenne operates with =
Connection "autoCommit=3Dtrue".
>=20
> =F0=9F=98=B1
> This setting is more scary that an Halloween costume to me! =F0=9F=98=85=

> I trust your understanding of the trade-offs at play, but I have
> always considered autoCommit the option used by toy projects, not
> suitable for serious tasks.
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> But my views may well be obsolete by now. =F0=9F=98=81
>=20
> Cheers, and =E2=80=93as always=E2=80=93 huge congratulations to all =
people involved in
> moving the project forward.
>=20
> Giulio Cesare
>=20
> On Tue, Jul 7, 2026 at 3:17=E2=80=AFPM Andrus Adamchik =
<[email protected]> wrote:
>>=20
>> I am glad the new change didn't break much stuff :) Always a concern =
with all the new ideas.
>>=20
>> BTW, as you probably noticed, we are now exposing translated queries =
with parameters as standalone record objects instead of going straight =
from translator to PreparedStatement, so they can be captured, =
inspected, logged, etc (e.g., what the SQLLogger does).
>>=20
>> And on the broader topic of observability, we started an effort to =
integrate OpenTelemetry into Bootique, and I hope this will come back to =
Cayenne as well. Would be nice to have otel spans for queries. But as =
your video demonstrates, explicit instrumentation is almost irrelevant =
these days. The tools are so good... they can grab the logs, or do =
automated runtime instrumentation and show you transaction traces with =
next to zero effort.
>>=20
>> Andrus
>>=20
>>=20
>>=20
>>> On Jul 6, 2026, at 7:15=E2=80=AFPM, Hugi Thordarson =
<[email protected]> wrote:
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>>> Hi Andrus,
>>>=20
>>> first =E2=80=94 that logging is a vast, vast improvement, I'm loving =
it!
>>>=20
>>> So happens I've been playing a lot with Cayenne's logging lately. =
Very happy about how easy it was/is to hook into query logging and I've =
used it to profile SQL-queries in my web application templates for years =
now =E2=80=94 keeping track of the time methods spend querying to find =
performance problems (profiling/aggregating by bindings rather than =
methods really, in WO terms) and watching the SQL they executed.
>>>=20
>>> Helpful, but has always been private utility logic for myself since =
it just prints ugly text reports and I never took the time to make it =
pretty and usable for others.
>>>=20
>>> But that was before Claude :). So now there's this: Inline SQL =
logging. Probably easiest described through video =E2=80=94 =
https://www.youtube.com/watch?v=3DhoW1WusKSRo .
>>>=20
>>> =E2=80=A6works great with the new SQLLogger interface. Already =
ported, since I'll be switching to -SNAPSHOT (in dev only for a while, =
to test the behaviour of the new transaction setup, really looking =
forward to putting it through it's paces).
>>> Been using M2 in production since release and it works great, =
congrats on another awesome release  :).
>>>=20
>>> Cheers,
>>> - hugi
>>>=20
>>>=20
>>>=20
>>>> On 6 Jul 2026, at 13:37, Andrus Adamchik <[email protected]> =
wrote:
>>>>=20
>>>> Hi,
>>>>=20
>>>> I wanted to highlight a few things in the upcoming M3. They are =
already on master, so maybe some brave souls can take it for a spin and =
give us feedback :)
>>>>=20
>>>> 1. Cayenne no longer wraps selecting queries (or at least those it =
can reliably identify as selecting) into transactions.
>>>>=20
>>>> I had a suspicion for years that we shouldn't be doing that. Now I =
was able to vibecode real benchmarks on multiple databases, and time =
savings in the JDBC layer with faster queries are about 2x! (as each =
useless "commit" is a separate command sent to DB that needs to be =
processed). But this means that for the first time Cayenne operates with =
Connection "autoCommit=3Dtrue". So I'd appreciate feedback if this =
causes any weirdness with your DataSources.
>>>>=20
>>>>=20
>>>> 2. SQL logging changes. There are multiple changes. Some address =
operational concerns (saving hundreds of GB of storage space; =
single-line logs are easier to parse), others are "quality of life":
>>>>=20
>>>> * No tx for selects (mentioned above) by itself cuts down on 2 log =
lines per query
>>>> * The new logger name is short and descriptive "cayenne-sql"
>>>> * ERROR log level for queries that result in exceptions
>>>> * SQL query logs are single-line. Parameters, timers, result =
counters, generated keys are placed on one line and rendered in a =
compact format. Tx wrapping is still done on separate lines (as a tx can =
include more than one SQL statement)
>>>>=20
>>>> INFO cayenne-sql tx started
>>>> INFO cayenne-sql INSERT INTO BINARY_PK_TEST1(BIN_ID, NAME) =
VALUES(?, ?) | =
bind:[BIN_ID:FBBC4034ED8F0214B2C559CF1029C1868A66F0D59208A36C9365126C248C.=
..,NAME:'master1'] updated:1 time_ms:0
>>>> INFO cayenne-sql tx committed
>>>>=20
>>>> * Mnemonic table aliases. No more meaningless t0, t1, t2:
>>>>=20
>>>> INFO cayenne-sql SELECT p.ESTIMATED_PRICE, p.PAINTING_DESCRIPTION, =
p.PAINTING_TITLE, p.ARTIST_ID, p.GALLERY_ID, p.PAINTING_ID, =
g.GALLERY_ID, g.GALLERY_NAME FROM PAINTING p LEFT JOIN GALLERY g ON =
p.GALLERY_ID =3D g.GALLERY_ID | selected:1 time_ms:0
>>>>=20
>>>> * No alias for single-table queries
>>>>=20
>>>> INFO cayenne-sql - SELECT ESTIMATED_PRICE, PAINTING_DESCRIPTION, =
PAINTING_TITLE, ARTIST_ID, GALLERY_ID, PAINTING_ID FROM PAINTING | =
selected:2 time_ms:0
>>>>=20
>>>>=20
>>>> (I am also thinking of lowercasing the SQL so that logs don't look =
like they are screaming at you :))
>>>>=20
>>>> Andrus
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>=20
>>=20