Is it worth trying to factor Transactional apart into 
TransactionalPossiblyWithAbort and TransactionalWithAbort? (With better names, 
of course! {grin})

---
A. Soroka
The University of Virginia Library

> On Feb 6, 2016, at 11:15 AM, Andy Seaborne <[email protected]> wrote:
> 
> JENA-1089, JENA-1131
> 
> DatasetGraphs now support the Transactional interface, rather than it being 
> an optional extra.  Dataset itself already had Transactional.
> 
> Implementations of DatasetGraph now need to opt out of transactions via the 
> TransactionalNotSupported interface.
> 
> DatasetGraph and Dataset provide
> 
>   supportTransactions() : begin/commit/end
>   supportTransactionAbort() : and also abort.
> 
> Some of the compound DSGs can't provide abort properly.  Crashing out of a 
> transaction with an exception needs proper abort.
> 
> DatasetGraphText provides abort if and only if the underlying data does.
> 
> jena-text is the most complicated part of the changes.  All the tests pass 
> but if you are a big user of jena-text with update it would be worth checking 
> the changes.
> 
> Rob - I switched the tests for jena-jdbc-driver-mem to use the transaction 
> memory dataset implementation. In the course of that, I
> found and fixed an oddity in jena-jdbc-driver-mem:MemConnection. The code 
> comments discuss the initialization issue.
> 
>       Andy

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