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From "Stepan Koltsov (JIRA)" <>
Subject [jira] Commented: (IVY-1195) feature request: retrying resolver wrapper
Date Wed, 09 Jun 2010 19:37:14 GMT


Stepan Koltsov commented on IVY-1195:

* There are tons of build servers. Some people use simple cron + shell to build projects.

* "Lib" build may not be yet scheduled, because SVN is not checked for new version (but "app"
is scheduled, because it lives in another SVN repository, that is checked at different schedule)

* Buildserver may be building another version of "lib", and and this case build of "app" should
not be delayed

* It build of next version if "lib" is scheduled, build of "app" should not be postponed

> feature request: retrying resolver wrapper
> ------------------------------------------
>                 Key: IVY-1195
>                 URL:
>             Project: Ivy
>          Issue Type: New Feature
>          Components: Core
>    Affects Versions: 2.1.0
>            Reporter: Stepan Koltsov
> I'm requesting a retrying resolver.
> *description*
> Retrying resolver delegates resolution to configured child resolver. If child resolver
fails, if requests child to perform a resolution again after some time.
> *example*
> {code}
> <resolvers>
>   <retry name="default" timeout="5m" start="10s" exp="1.5">
>     <svn .../>
>   </retry>
> </resolvers>
> {code}
> In the example above, "default" resolver will try call SVN resolver to resolve dependencies,
if SVN resolver fails, it will be called again after 10s, then after 15s, then after 27s,
and so on, but not after 5 minutes after resolver start.
> *motivation*
> We have build server, that builds projects right after commit. Projects depend on concrete
revisions of another projects, revisions are specified in ivy.xml (say, "app" depends on "lib").
Sometimes developers commit to dependent project  "app" immediately after commit to the base
project "lib". And in this case there is a high chance, that base project "lib" is not yet
built (so artifact is not published) at the time of dependent project "app" ivy:resolve task
run. So build of dependent project "app" fails.
> Retry task could resolve this situation: dependent project "app" build start will be
delayed until completion of "lib" build.

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