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https://issues.apache.org/jira/browse/KARAF-3469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14322822#comment-14322822
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Christian Schneider commented on KARAF-3469:
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The code is in config.core. I worked around the issue by using the OSGi API so
it is not critical to have this.
It would be possible to move that code into a new bundle but I thought a bundle
for just one command would be overkill.
About the felix command style: Felix commands are implemented as singletons. So
they can simply be registered as services using plain DS. Se we would not have
to create any wiring framework at all. When I look at the current karaf 4 code
I feel that we are doing things in a very proprietary way. Most of this is
because we decided that commands should be created per execution. But we
dicussed this already and I am being off topic for this issue :-)
> It should be possible to create a reference to an optional service from a
> command
> ---------------------------------------------------------------------------------
>
> Key: KARAF-3469
> URL: https://issues.apache.org/jira/browse/KARAF-3469
> Project: Karaf
> Issue Type: Improvement
> Reporter: Christian Schneider
> Fix For: 4.0.0
>
>
> To inject services into commands you use the
> @org.apache.karaf.shell.api.action.lifecycle.Reference annotation. Unlike the
> one from DS this annotation does not have an optional flag.
> We should allow to reference optional services and have them injected with
> null if they are not present.
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