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https://issues.apache.org/jira/browse/JCRVLT-195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16087016#comment-16087016
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Konrad Windszus commented on JCRVLT-195:
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{quote}
for example if the package contains JSPs, you can express the runtime 
dependencies through this property.
{quote}
Not sure this is the same use case, because most of the java classes being used 
from JSPs are provided by a bundle embedded in the same package. I guess for 
those (runtime) dependencies there is no need to list those in the package 
manifest. Also external packages being referenced from JSPs are not technically 
required to install the package.

The use case for hooks is a bit different, as the installation of the package 
actually requires the dependent package to be there. So I am talking about a 
installation time dependency and you about a runtime dependency. Not sure 
whether both should use the same headers.

> Support OSGi bundle dependencies
> --------------------------------
>
>                 Key: JCRVLT-195
>                 URL: https://issues.apache.org/jira/browse/JCRVLT-195
>             Project: Jackrabbit FileVault
>          Issue Type: Improvement
>          Components: Packaging
>            Reporter: Konrad Windszus
>            Assignee: Tobias Bocanegra
>             Fix For: 3.1.42
>
>
> FileVault Packages support both internal and external hooks. Internal hooks 
> are JARs which are part of the package itself. External hooks are provided 
> through some classloader (usually through the Bundle Classloader in an OSGi 
> context, https://issues.apache.org/jira/browse/JCRVLT-116). Installing a 
> package depending on an external hook class which is not found, leads to an 
> error.
> Therefore it would be beneficial to explicitly add a dependency from the 
> package referencing an external hook towards the OSGi bundle providing the 
> hook. Only that way it can be assured, that the installation of this package 
> is deferred until that bundle providing the hook is finally active. Currently 
> only package dependencies are supported though, which are not enough, as 
> there is a delay until the embedded bundle in a package is deployed as well.



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