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From "Xavier Hanin (JIRA)" <>
Subject [jira] Commented: (IVY-492) support atomic publish operation
Date Fri, 11 May 2007 07:35:15 GMT


Xavier Hanin commented on IVY-492:

It seems we'd better have agreed on our jira/mailing list guidelines :-)

I see an advantage of using directly the file resolver for this and modifying the Repository
and DependencyResolver interface directly: people could benefit of this without changing their
settings, by simply droping the appropriate jar in their classpath. And you could control
atomicity with a simple property on the resolver (transactional="true" for instance).

OTOH, with explicit transactional resolvers, you can raise an error if the jar is not available.
But we could also do that if one set explictly the property 'transactional' (which could actually
the values true, false, or auto (the default value) for automatic detection.

And if we later provide transactional support for other resolvers (maybe all), it will make
the settings easier IMHO.


> support atomic publish operation
> --------------------------------
>                 Key: IVY-492
>                 URL:
>             Project: Ivy
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Geoff Reedy
> Some resolver types (e.g. one that uses subversion) could benefit from publishing a module
as a single atomic transaction.  Currently, each artifact (and it's checksums) are published
as separate operations, if one of the artifact uploads fail (perhaps an artifact is missing
or another user is trying to publish the same version at the same time) the ivy repository
can be in an inconsistent state with a half published module.  In addition, if uploads are
logged many entries in the log are generated for a single logical operation.
> A possible implementation strategy is to add three new methods to the resolver interface:
> beginPublish(ModuleRevisionId)
> abortPublish()
> commitPublish()
> beginPublish would be called before publishing the artifacts of the module, abortPublish
would be called if there is an error while publishing the module, commitPublish would be called
if all artifacts were successfully published.  Existing resolvers could simple implement these
methods as no-ops to retain the present behavior.

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