org.apache.nutch.db
Class EditSectionGroupWriter.KeyExtractor

java.lang.Object
  org.apache.nutch.db.EditSectionGroupWriter.KeyExtractor

Direct Known Subclasses:

EditSectionGroupWriter.LinkMD5Extractor, EditSectionGroupWriter.LinkURLExtractor, EditSectionGroupWriter.PageMD5Extractor, EditSectionGroupWriter.PageURLExtractor

Enclosing class:

EditSectionGroupWriter

public abstract static class EditSectionGroupWriter.KeyExtractor

extends Object

Edit instructions are Comparable, but they also have an "inner" key like MD5Hash or URL that is also Comparable. This class extracts that inner key, which we need for allocating a Page or Link Instruction into the correct bucket.

Constructor Summary

EditSectionGroupWriter.KeyExtractor()

Method Summary

abstract WritableComparable

extractInnerKey(WritableComparable key)

Methods inherited from class java.lang.Object

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

Constructor Detail

EditSectionGroupWriter.KeyExtractor

public EditSectionGroupWriter.KeyExtractor()

Method Detail

extractInnerKey

public abstract WritableComparable extractInnerKey(WritableComparable key)