[jira] [Commented] (JENA-1223) Provide transaction promotion

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JENA-1223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15415568#comment-15415568 ] 

ASF GitHub Bot commented on JENA-1223:
--------------------------------------

Github user afs commented on the issue:

    https://github.com/apache/jena/pull/161
  
    See JENA-1223 for overall discussion of API issues and to record changes in subsystems.


> Provide transaction promotion
> -----------------------------
>
>                 Key: JENA-1223
>                 URL: https://issues.apache.org/jira/browse/JENA-1223
>             Project: Apache Jena
>          Issue Type: Improvement
>          Components: TDB
>    Affects Versions: Jena 3.1.0
>            Reporter: Andy Seaborne
>
> This JIRA is to add the ability for a read transaction to promote to a write transaction.
> API changes are necessary to expose this feature properly and uniformly.
> PR #161 provides the machinery for TDB. To avoid general API changes outside TDB, this happens automatically in {{DatasetGraphTransaction.getW()}} if enabled (by default it isn't, the PR makes no change to behaviour of TDB by default).  It needs to be enabled with {{DatasetGraphTransaction.promotion = true}}.
> This leads towards a general {{begin()}} for transactions. 
> This JIRA is cover discussion on the API and record changes to the subsystems.



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