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https://issues.apache.org/jira/browse/JENA-1090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15370363#comment-15370363
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ASF GitHub Bot commented on JENA-1090:
--------------------------------------
Github user afs commented on the issue:
https://github.com/apache/jena/pull/153
If one of the transaction operations throws anything then the system is
broken. It should not happen and would indicate an unrepairable error condition
(e.g. NPE, broken journal).
After that, all bets are off!
> 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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