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Posted to dev@aries.apache.org by "Rex Wang (JIRA)" <ji...@apache.org> on 2011/09/01 05:35:09 UTC
[jira] [Commented] (ARIES-727) support syntax : ${a+b} in
blueprint-cm
[ https://issues.apache.org/jira/browse/ARIES-727?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13095100#comment-13095100 ]
Rex Wang commented on ARIES-727:
--------------------------------
At revision: 1163525, add unit test for this feature.
At revision: 1163899, make the commons-jexl a optional dependency. People won't need this if he don't use the syntax ${a+b} in blueprint-ext.
This still commit to 0.3 branch.
Hi, Jeremy, Thanks for the information! I did not notice that and assumed trunk is at 0.4.x level... I will port all the changes to trunk soon :-)
-Rex
> support syntax : ${a+b} in blueprint-cm
> ----------------------------------------
>
> Key: ARIES-727
> URL: https://issues.apache.org/jira/browse/ARIES-727
> Project: Aries
> Issue Type: New Feature
> Components: Blueprint
> Affects Versions: blueprint-0.3.1, blueprint-0.4.0
> Reporter: Rex Wang
> Assignee: Rex Wang
> Fix For: blueprint-0.4.0
>
> Attachments: ARIES-727-blueprint-cm.patch, ARIES-727-fixes-in-blueprint-ext.patch
>
>
> I am wondering if Aries blueprint-cm support such scenario:
> <cm:property-placeholder id="property-placeholder" persistent-id="o.a.b.com" placeholder-prefix="${" placeholder-suffix="}">
> <cm:default-properties>
> <cm:property name="port" value="12345"/>
> <cm:property name="offset" value="10"/>
> </cm:default-properties>
> </cm:property-placeholder>
> <xxx:conn name="loc" uri="http://localhost:${port+offset}"/>
> I have a test, but seems the ${port+offset} can not be replaced with value "12355".
> -Rex
> -----------------------
> Hi Rex,
> to my knowledge (substantiated with a quick code inspection) the placeholders in Aries today support no operators or arithmetic like that. But please do raise an Improvement JIRA for the future :)
> Regards,
> Valentin
> -----------------------
> When we support this, we need to perform a 'plus' or string concatenate
> operation based on the variable type:).
> Therefore. when specifying the property in the blueprint xml, the explicit
> type should be specified if not string.
> Regards,
> Emily
> -----------------------
> I _think_ I wrote something like this for xbean-blueprint since it didn't look like blueprint supported it. IIRC I used the same calculation engine as the geronimo config substitutions. I think you can infer what kind of calculation to do (addition or concatenation) from the type of the property you end up setting.
> thanks
> david jencks
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