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Re: [jta-dev] Enhancement of the @Transactional Annotation
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I think timeout and readOnly should be more straight
forward:
For timeout the XAResource Interface provides a way to set
it: https://docs.oracle.com/javase/8/docs/api/javax/transaction/xa/XAResource.html#setTransactionTimeout-int-
It seems to be a optional feature of the underlying
ResourceManager, so it would be nice to maybe log a warning in
that.
For readOnly the main benefit is in what the specific
implementaion makes of it (i.a. optimizations, as pointed out by
Christian). I think the only requirement should be, that no
entities may be updated, created or deleted. That way no work
should be enlisted and the transaction can be commited as
readonly.
For Isolation-Levels:
I do not 100% understand how the internals of the Transactional
Implementation(s) work, but from my naive standpoint shouldn't it
be possible to somehow acquire the currently used
java.sql.Connection and just do something like this:
connection.setTransactionIsolation(Connection.TRANSACTION_READ_UNCOMMITTED);
connection.setReadOnly(true);
As under the hood surely jdbc is used as well, or am I wrong
here?
On 06.12.22 10:45, Tom Jenkinson wrote:
Thank you for raising the topic!
I think an important consideration when adding things to
Jakarta Transactions is what can the XAResource API support?
Hello there,
I am new to this mailing list so maybe a few short words
to myself first: I am a Software Engineer in Germany
responsible for our JavaEE, soon to be JakartaEE
framework. I am quiet interested in JakartaEE and its
development.
The topic I would like to discuss is the enhancement of
the @Transactional Annotation for JakartaEE 11. A good
template would be the Spring specific
Annotation of the same name which supports among
other things :
- Isolation levels
- timeout
- readOnly
I already found a issue on github
regarding the Topic, which unfortunately has not seen any
attention given to it since 2016. So I wanted to spark a
discussion.
In my opinion these enhancement could be quiet helpful.
Thanks in advance and best regards
Benedict Eisenkrämer
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