[jira] Commented: (FELIX-2663) Allow ConfigInstaller to perform placeholder substitution from framework properties

["Richard S. Hall (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FELIX-2663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12921115#action_12921115 ] 

Richard S. Hall commented on FELIX-2663:
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File Install just needs to use BundleContext.getProperty() for its property lookup instead of calling System.getProperty() directly, since the former already exposes system properties unless they are overwritten by configuration properties.

> Allow ConfigInstaller to perform placeholder substitution from framework properties
> -----------------------------------------------------------------------------------
>
>                 Key: FELIX-2663
>                 URL: https://issues.apache.org/jira/browse/FELIX-2663
>             Project: Felix
>          Issue Type: Improvement
>          Components: File Install
>    Affects Versions: fileinstall-3.0.2
>            Reporter: David Hay
>
> The ConfigInstaller class will perform placeholder substitution using configuration values defined elsewhere in the .cfg file or using System properties.  Would be nice if it could also use properties defined by the framework (i.e. BundleContext.getProperty())
> The use case is this:  As part of the OSGi framework initialization, some properties are set on the framework that define things such as a "home" directory.  The various configuration files could then refer to resources relative to this "home" directory.  For example:
> props.setProperty("app.home", homeDir); // homeDir provided by JNDI config, env variable, etc.
> frameworkFactory.newFramework(props);
> ...
> Then, in a configuration file read by the FileInstall bundle, it would be nice to be able to do:
> data.directory=${app.home}/data/

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