# Hierarchy For Package org.apache.nutch.host

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - org.apache.hadoop.conf.Configured (implements org.apache.hadoop.conf.Configurable)
    - org.apache.nutch.host.HostDbReader (implements org.apache.hadoop.util.Tool)
  - org.apache.nutch.host.HostDb (implements java.io.Closeable)
  - org.apache.nutch.host.HostDbUpdateJob (implements org.apache.hadoop.util.Tool)
  - org.apache.nutch.host.HostInjectorJob (implements org.apache.hadoop.util.Tool)
  - org.apache.hadoop.mapreduce.Mapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
    - org.apache.gora.mapreduce.GoraMapper<K1,V1,K2,V2>
      - org.apache.nutch.host.HostDbUpdateJob.Mapper
    - org.apache.nutch.host.HostInjectorJob.UrlMapper
  - org.apache.hadoop.mapreduce.Reducer<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
    - org.apache.gora.mapreduce.GoraReducer<K1,V1,K2,V2>
      - org.apache.nutch.host.HostDbUpdateReducer

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