[GitHub] [jena] afs edited a comment on pull request #954: JENA-2004: Add application methods to Transactional

[GitBox <gi...@apache.org>]

afs edited a comment on pull request #954:
URL: https://github.com/apache/jena/pull/954#issuecomment-800107707


   From #872:
   An alternative design with `TxnTrait` (the default methods added separately) might be better. This leaves Transaction cleaner as an implementation API.
   
   ```
   public interface TxnTrait extends Transactional {
       public default void exec(TxnType txnType, Runnable r) {
           Txn.exec(this, txnType, r);
       }
   
       public default <X> X calc(TxnType txnType, Supplier<X> r) {
           return Txn.calc(this, txnType, r);
       }
   ...
   }
   ```
   then
   ```
   public interface Dataset extends TxnTrait
   ```
   On the other hand, the API for user/application is then more complicated.
   


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