Class ModifiedTemplate
- java.lang.Object
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- sunlabs.brazil.template.Template
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- sunlabs.brazil.template.ModifiedTemplate
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- All Implemented Interfaces:
java.io.Serializable
,TemplateInterface
public class ModifiedTemplate extends Template implements java.io.Serializable
Template class for computinglast-modified
times for content that is processed through templates.For traditional web content that is stored in a file, it is easy to keep track of the last time the content changed, simply by looking at the modify-time attribute of the file. Many browsers (and caches) use this information, obtained from the
last-modified
http header to determine whether to use an existing copy of the document, or a cached copy.When the content is dynamically transformed, however, the last modified time is more complex: a combination of the original file modification time combined with the last change made to the transformation parameters.
A new HTML tag,
<modified>
is defined, and is intended to be used in conjunction with the BSLTemplate. When present in a page, thelast-modified
time of the transformation is set to the server's current time. When the content is delivered to the client, thelast-modified
header is set to the more recent of the origin last-modified time and the transformation modified time.Properties:
- debug
- If this configuration parameter is present,
modified
tag is replaced by a comment. Otherwise it is removed from the document.
- Version:
- %V% 07/01/08
- Author:
- Stephen Uhler
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description ModifiedTemplate()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
done(RewriteContext hr)
Compute the http last modified value by comparing the origin last-modified value (if any) with the transform valuevoid
tag_modified(RewriteContext hr)
Set the content transformation modifiy time to NOW
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Method Detail
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tag_modified
public void tag_modified(RewriteContext hr)
Set the content transformation modifiy time to NOW
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done
public boolean done(RewriteContext hr)
Compute the http last modified value by comparing the origin last-modified value (if any) with the transform value- Specified by:
done
in interfaceTemplateInterface
- Overrides:
done
in classTemplate
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