[logback-dev] [JIRA] Commented: (LBCLASSIC-182) Evaluable properties

Aleksey Didik (JIRA) noreply-jira at qos.ch
Thu Feb 4 16:18:33 CET 2010

    [ http://jira.qos.ch/browse/LBCLASSIC-182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=11511#action_11511 ] 

Aleksey Didik commented on LBCLASSIC-182:

Ok, looks like all right except one point.
Is PropertyDefiner interface extends ContextAware interface?
imo -  yes, because property defining process can generate some errors or depends on already existed context.
If yes, I need to make PropertyDefinerBase extends ContextAwareBase. 
What do you think?

> Evaluable properties
> --------------------
>                 Key: LBCLASSIC-182
>                 URL: http://jira.qos.ch/browse/LBCLASSIC-182
>             Project: logback-classic
>          Issue Type: New Feature
>          Components: Other
>    Affects Versions: 0.9.18
>            Reporter: Aleksey Didik
>            Assignee: Ceki Gulcu
>            Priority: Minor
> Necessary to have properties which could be evaluated dynamically in time of configuration file read.
> Currently we have statical defined property values (by property tag or files) or we could get properties from System properties.
> In version 0.9.17 was made possibility to save formatted timestamp in property.
> May be possible to create property evaluator tag, to define some properties value dynamically?
> Something like this:
> <property name="hostName" evaluator="a.b.c.HostPropertyEvaluator">
>       <parameter name="host_type">ip</parameter>
> </property>
> Evaluator will be called on property initialization with listed parameters.

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