Set a macro library programmatically for each individual page request
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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
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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