Add configuration to skip session.save in AbstractPostOperation
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Key: SLING-2227
URL: https://issues.apache.org/jira/browse/SLING-2227
Project: Sling
Issue Type: Improvement
Components: Servlets
Reporter: Markus Joschko
Attachments: session_skip.diff
With SLING-1725 the postservlet operations have been exposed as services to be
consumed by other servlets.
I use that to create two nodes with the ModifyOperation in one request.
However the second node creation might fail because of the postprocessors.
In that case I want to return an error to the user and have nothing stored.
This can't be done at the moment as the AbstractPostOperation always saves
independently from its context (so first node gets saved, second node not).
I think it makes a lot of sense to let the caller of the operation have control
over when the session is saved and introduced a flag to skip the save when
requested.
It is modeled after the isSkipCheckin flag.
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