[jira] [Commented] (JENA-1090) Add transaction handling convenience code

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

    [ https://issues.apache.org/jira/browse/JENA-1090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15369300#comment-15369300 ] 

ASF GitHub Bot commented on JENA-1090:
--------------------------------------

GitHub user afs opened a pull request:

    https://github.com/apache/jena/pull/153

    JENA-1090: Txn - a java8-centric transaction API

    

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/afs/jena txn

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/jena/pull/153.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #153
    
----
commit 952aebd0ac8f2d5d590811f0ac97d3c17c9bea5a
Author: Andy Seaborne <an...@apache.org>
Date:   2016-07-09T21:40:03Z

    JENA-1090 : Txn - a java8-centric transaction API

commit 52ff200c2756c9844b4346ffa1bff2a09081b649
Author: Andy Seaborne <an...@apache.org>
Date:   2016-07-09T21:41:01Z

    Merge branch 'master' of https://github.com/apache/jena into txn

----


> Add transaction handling convenience code
> -----------------------------------------
>
>                 Key: JENA-1090
>                 URL: https://issues.apache.org/jira/browse/JENA-1090
>             Project: Apache Jena
>          Issue Type: Improvement
>          Components: ARQ
>            Reporter: Andy Seaborne
>
> The code [Txn|https://github.com/afs/jena-rdfconnection/blob/master/src/main/java/rdfconnection/Txn.java] provides a convenient way to write common patterns of transaction usage including 
> {noformat}
>  Txn.executeWrite(conn, () ->{
>        ... write transaction code ...
>         }) ;
> {noformat}
> which provides the pattern:
> {noformat}
> txn.begin(ReadWrite.WRITE) ;
> try {
>     ... write transaction code ...
>     txn.commit() ;
> }
>  finally { txn.end() ; }
> {noformat}
> {{Txn}} also checks for being in a transaction already.
> There are forms to return a value from the code inside the transaction block as well.



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