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https://issues.apache.org/jira/browse/NUTCH-421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sami Siren reassigned NUTCH-421:
--------------------------------
Assignee: Sami Siren
> Allow predeterminate running order of index filters
> ---------------------------------------------------
>
> Key: NUTCH-421
> URL: https://issues.apache.org/jira/browse/NUTCH-421
> Project: Nutch
> Issue Type: Improvement
> Components: indexer
> Affects Versions: 0.8.1
> Environment: All
> Reporter: Alan Tanaman
> Assigned To: Sami Siren
> Priority: Minor
> Attachments: nutch-421.patch
>
>
> I've tested a patch for org.apache.nutch.indexer.IndexingFilters, allowing
> the user to state in which order the indexing filters are to be run based on
> a new
> indexingfilter.order property. This is needed when a filter needs to rely on
> previously generated document fields as a source of input to generate further
> fields.
> As suggested elsewhere, I based this on the urlfilter.order functionality:
> <property>
> <name>indexingfilter.order</name>
> <value>org.apache.nutch.indexer.basic.BasicIndexingFilter
> org.apache.nutch.indexer.more.MoreIndexingFilter</value>
> <description>The order by which index filters are applied.
> If empty, all available index filters (as dictated by properties
> plugin-includes and plugin-excludes above) are loaded and applied in system
> defined order. If not empty, only named filters are loaded and applied
> in given order. For example, if this property has value:
> org.apache.nutch.indexer.basic.BasicIndexingFilter
> org.apache.nutch.indexer.more.MoreIndexingFilter
> then BasicIndexingFilter is applied first, and MoreIndexingFilter second.
> Since all filters are AND'ed, filter ordering does not have impact
> on end result, but it may have performance implication, depending
> on relative expensiveness of filters.
> </description>
> </property>
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