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https://issues.apache.org/jira/browse/VELOCITY-529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12521689
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Will Glass-Husain commented on VELOCITY-529:
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Supun has posted a new patch for this at Velocity-362.
> Set a macro library programmatically for each individual page request
> ---------------------------------------------------------------------
>
> Key: VELOCITY-529
> URL: https://issues.apache.org/jira/browse/VELOCITY-529
> Project: Velocity
> Issue Type: New Feature
> Reporter: Will Glass-Husain
> Priority: Minor
> Fix For: 1.6
>
> Attachments: template_macro_lib.patch
>
>
> I'd like to see Velocity allow developers to specify one or more macro files
> programmatically when a page is processed. The resulting behavior would be
> the same as if the user had used #parse to load the macro file at the top of
> the page. (assuming VELOCITY-362 was fixed and this worked).
> Velocity currently allows a developer to specify a VMGlobal library which
> loads a common set of macros applied for all pages. This is different
> because the macro file could be different for different pages.
> Probably the best way for this to work would be to use a structure similar to
> the event handlers which specifies a macro file name and attaches it to the
> context. When the page is processed, Velocity would use the resource loaders
> to load both the page and the macro file. (taking advantage of the resource
> caching mechanism for optimal performance).
> Why is this useful? There may be cases where different parts of an
> application require different sets of macros. In some cases, you may have
> many different parties developing different parts of the application. (For
> example in my primary app, we have large amounts of users regularly uploading
> Velocity pages to separate accounts). It's good practice to separate out
> modules from the main file. If this could be specified programmatically then
> template writers could upload both a macro file as well as a set of templates
> that use them.
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