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From "Denis Jouvin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (KARAF-5202) Groovy and groovysh integration into Karaf console
Date Mon, 12 Jun 2017 15:20:00 GMT

     [ https://issues.apache.org/jira/browse/KARAF-5202?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Denis Jouvin updated KARAF-5202:
--------------------------------
    Description: 
The idea is to integrate Groovy into Karaf as an alternative scripting and/or interactive
shell language. Since Groovysh also uses JLine, integration is quite easy (pass the current
Jline console/session instance to Groovysh at construction time). There are some class loading
issues though since Groovy uses sometimes the TCCL even when we instruct it to use a given
class loader (I opened a Groovy JIRA issue about that).

The Groovysh shell then would allow to get OSGi service reference or Blueprint/Spring context
references, or execute Karaf commands. Groovysh has a very nice command completion feature
that enable to discover any objet (including OSGi service instance) API at runtime, which
makes it very easy to play with in a dynamic environment like Karaf. In addition, its native
closures and set operations, and very concise syntaxe, facilitates its use as a shell replacement.

This open nice possibilites like exploratory programming on a live running Karaf instance,
scripting, tests or analysis, etc.

Another common use case is to modify a not yet parameterized value in a Blueprint or Spring
context at runtime (you can browse or access the Blueprint context components, and reinstaciate
them or inject properties).


  was:
The idea is to integrate Groovy into Karaf as an alternative scripting and/or interactive
shell language.

The Groovysh shell then would allow to get OSGi service reference, or Blueprint/Spring context
references. 

This open some possibilites like exploratory programming, scripting, live tests or analysis,
etc.




> Groovy and groovysh integration into Karaf console
> --------------------------------------------------
>
>                 Key: KARAF-5202
>                 URL: https://issues.apache.org/jira/browse/KARAF-5202
>             Project: Karaf
>          Issue Type: New Feature
>          Components: karaf-shell
>            Reporter: Denis Jouvin
>            Assignee: Jean-Baptiste Onofré
>            Priority: Minor
>              Labels: Groovy, Groovysh, Karaf, ShellCommands
>
> The idea is to integrate Groovy into Karaf as an alternative scripting and/or interactive
shell language. Since Groovysh also uses JLine, integration is quite easy (pass the current
Jline console/session instance to Groovysh at construction time). There are some class loading
issues though since Groovy uses sometimes the TCCL even when we instruct it to use a given
class loader (I opened a Groovy JIRA issue about that).
> The Groovysh shell then would allow to get OSGi service reference or Blueprint/Spring
context references, or execute Karaf commands. Groovysh has a very nice command completion
feature that enable to discover any objet (including OSGi service instance) API at runtime,
which makes it very easy to play with in a dynamic environment like Karaf. In addition, its
native closures and set operations, and very concise syntaxe, facilitates its use as a shell
replacement.
> This open nice possibilites like exploratory programming on a live running Karaf instance,
scripting, tests or analysis, etc.
> Another common use case is to modify a not yet parameterized value in a Blueprint or
Spring context at runtime (you can browse or access the Blueprint context components, and
reinstaciate them or inject properties).



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