Changes between Version 4 and Version 5 of ChangesFromNGR


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Timestamp:
Aug 24, 2009, 4:19:09 AM (15 years ago)
Author:
heikki
Comment:

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  • ChangesFromNGR

    v4 v5  
    5252
    5353== Proposal ==
    54 TODO
     54
     55'''1.''' Performance improvement to search[[BR]]
     56In current !GeoNetwork, the search from the main page works as follows: the request with search parameters is sent to !GeoNetwork and is turned into a JDOM structure by Jeeves; this request object is processed in XSLT (lucene.xsl), the result of which is a different JDOM structure; this in turn is processed to create the actual Lucene query.[[BR]]
     57This proposal removes the step of XSLT processing by lucene.xsl. The function of lucene.xsl is exactly re-built in Java (!LuceneQueryBuilder.java). The resulting Lucene query is not changed in this proposal.[[BR]]
     58!LuceneQueryBuilder.java was developed [http://www.extremeprogramming.org/rules/testfirst.html test-first] and as a result, it's well covered by a unit test.[[BR]][[BR]]
     59A second performance gain is effected by a change to retrieving the regions data in the search service. In standard !GeoNetwork, the regions are retrieved from the DB at each search request; in this proposal, it happens only once, after which the regions data is kept in memory for application lifetime.[[BR]][[BR]]
     60Performance metrics from [http://www.yourkit.com/ YourKit Java Profiler] show that this change leads to a 90% performance increase of the search service as such (excluding the creation of the search results page).
     61
     62'''2.''' Persistent validation results[[BR]]
     63'''3.''' Organizations[[BR]]
     64'''4.''' Service monitoring[[BR]]
     65'''5.''' Tabbed view of Metadata[[BR]]
     66'''6.''' Local rating[[BR]]
     67
    5568
    5669=== Backwards Compatibility Issues ===