Andrus Adamchik created CAY-1938:
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             Summary: Create a DI factory for transactions, get rid of 
TransactionDelegate and modeler config for tx policies
                 Key: CAY-1938
                 URL: https://issues.apache.org/jira/browse/CAY-1938
             Project: Cayenne
          Issue Type: Task
            Reporter: Andrus Adamchik
            Assignee: Andrus Adamchik
             Fix For: 3.2.M2


Transactions are an important crosscut aspect of the system, so they warrant 
their own DI factory. Instead of DataDomain being a de-facto factory for 
transactions, create an explicit DI-managed factory. External/internal 
transaction property must be set at the DI container level, not in the Modeler.

Documentation: document the new config property...

UPGRADE-NOTES:

* project using external transactions must ensure they set this as a property.
* this feature removes support for TransactionDelegate. A custom TX factory 
should be used if a delegate-like functionality is desired. For example it may 
use a decorator around a standard transaction to intercept transaction methods.



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