Rob Vesse created JENA-382:
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Summary: SPARQL Updates are not cancelable
Key: JENA-382
URL: https://issues.apache.org/jira/browse/JENA-382
Project: Apache Jena
Issue Type: Improvement
Components: ARQ
Reporter: Rob Vesse
Assignee: Rob Vesse
Currently queries are cancelable but updates are not. Updates are just of
capable of running awry especially since some of them can embed queries within
them. In general any update that generates a large amount of data can result
in a long running update.
Therefore we should make it possible to cancel updates, my rough proposal for
this is as follows:
1 - Provide a cancel() method on UpdateProcessor
2 - Provide a cancel() method on individual update commands so a processor can
cancel() whichever is currently running
When updates are cancelled it must be treated as if updates failed and the
transaction should be rolled back or marked as uncommittable as appropriate.
I will create a SVN branch to experiment on this feature.
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