The following comment has been added to this issue:
Author: Basil Vandegriend
Created: Thu, 29 May 2003 4:19 PM
Body:
I obtained performance measurements for xDoclet when the check is disabled for if the
template is newer than the generated file.
The measurements show a 15-25% reduction in time taken to do a generation when there
is nothing out-of-date to generate.
To implement the change, I simply modified GenerationManager.java in the xdoclet
package. The easiest place to add the option switch is in TemplateSubTask, but it may
make more sense to add the option to DocletTask and then pass it into the
TemplateSubTask (which is passed into the GenerationManager).
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View the issue:
http://opensource.atlassian.com/projects/xdoclet/secure/ViewIssue.jspa?key=XDT-504
Here is an overview of the issue:
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Key: XDT-504
Summary: Option to disable checking template files when determining if generation
is needed
Type: Improvement
Status: Assigned
Priority: Major
Time Spent: Unknown
Estimate: 0 minutes
Project: XDoclet
Components:
Core
Assignee: xdoclet-devel (Use for new issues)
Reporter: Basil Vandegriend
Created: Thu, 29 May 2003 10:33 AM
Updated: Thu, 29 May 2003 10:33 AM
Description:
Currently, as part of the process to determine if generation is necessary for a given
file w.r.t a given template, xDoclet checks to see if the template is newer than the
generated file.
Since one template can include (merge) other templates, there is some complex code to
check all the merged templates to make sure that none of them are newer than the
generated file.
This check causes several problems:
1. The code has defects which arise in particular circumstances. XDT-502 and XDT-349
are two defects that I'm aware of in particular.
2. I believe that this check is a significant performance hit.
Therefore, my suggestion is that there be an option (perhaps in DocletTask) to disable
checking if the template(s) are newer than the generated file. This check is really
only useful anyways if one is developing templates, or upgrades xDoclet. Otherwise,
for everyday use by regular (non-xdoclet) developers, it is not necessary to do this
check.
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