org.apache.nutch.scoring.orphan

## Class OrphanScoringFilter

- java.lang.Object
- - org.apache.nutch.scoring.AbstractScoringFilter
  - - org.apache.nutch.scoring.orphan.OrphanScoringFilter

- All Implemented Interfaces:
    Configurable, Pluggable, ScoringFilter

      public class OrphanScoringFilter
      extends AbstractScoringFilter

  Orphan scoring filter that determines whether a page has become orphaned, e.g. it has no more other pages linking to it. If a page hasn't been linked to after markGoneAfter seconds, the page is marked as gone and is then removed by an indexer. If a page hasn't been linked to after markOrphanAfter seconds, the page is removed from the CrawlDB.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static Text` | `ORPHAN_KEY_WRITABLE`

    - ### Fields inherited from interface org.apache.nutch.scoring.ScoringFilter

      `X_POINT_ID`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `OrphanScoringFilter()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `orphanedScore(Text url, CrawlDatum datum)` This method may change the score or status of CrawlDatum during CrawlDb update, when the URL is neither fetched nor has any inlinks.
    `void` | `setConf(Configuration conf)`
    `void` | `updateDbScore(Text url, CrawlDatum old, CrawlDatum datum, java.util.List<CrawlDatum> inlinks)` Used for orphan control.

    - ### Methods inherited from class org.apache.nutch.scoring.AbstractScoringFilter

      `distributeScoreToOutlinks, generatorSortValue, getConf, indexerScore, initialScore, injectedScore, passScoreAfterParsing, passScoreBeforeParsing`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### ORPHAN_KEY_WRITABLE

          public static Text ORPHAN_KEY_WRITABLE

  - ### Constructor Detail

    - #### OrphanScoringFilter

          public OrphanScoringFilter()

  - ### Method Detail

    - #### setConf

          public void setConf(Configuration conf)

      Specified by:
        `setConf` in interface `Configurable`
      Overrides:
        `setConf` in class `AbstractScoringFilter`

    - #### updateDbScore

          public void updateDbScore(Text url,
                                    CrawlDatum old,
                                    CrawlDatum datum,
                                    java.util.List<CrawlDatum> inlinks)
                             throws ScoringFilterException

      Used for orphan control.
      Specified by:
        `updateDbScore` in interface `ScoringFilter`
      Overrides:
        `updateDbScore` in class `AbstractScoringFilter`
      Parameters:
        `url` - of the record
        `old` - CrawlDatum
        `datum` - new CrawlDatum
        `inLinks` - list of inlinked CrawlDatums
      Throws:
        `ScoringFilterException`

    - #### orphanedScore

          public void orphanedScore(Text url,
                                    CrawlDatum datum)

      Description copied from interface: `ScoringFilter`
      This method may change the score or status of CrawlDatum during CrawlDb update, when the URL is neither fetched nor has any inlinks.
      Parameters:
        `url` - URL of the page
        `datum` - CrawlDatum for page

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