Class ModifiedTemplate

  • All Implemented Interfaces:
    java.io.Serializable, TemplateInterface

    public class ModifiedTemplate
    extends Template
    implements java.io.Serializable
    Template class for computing last-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, the last-modified time of the transformation is set to the server's current time. When the content is delivered to the client, the last-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
    • Field Summary

    • 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 value
      void tag_modified​(RewriteContext hr)
      Set the content transformation modifiy time to NOW
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • ModifiedTemplate

        public ModifiedTemplate()
    • Method Detail

      • tag_modified

        public void tag_modified​(RewriteContext hr)
        Set the content transformation modifiy time to NOW
      • 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 interface TemplateInterface
        Overrides:
        done in class Template