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

["Andy Seaborne (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JENA-1090?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andy Seaborne resolved JENA-1090.
---------------------------------
       Resolution: Fixed
         Assignee: Andy Seaborne
    Fix Version/s: Jena 3.1.1

> 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
>            Assignee: Andy Seaborne
>             Fix For: Jena 3.1.1
>
>
> 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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