org.apache.nutch.crawl

## Class URLPartitioner

- java.lang.Object
- - org.apache.hadoop.mapreduce.Partitioner<Text,Writable>
  - - org.apache.nutch.crawl.URLPartitioner

- All Implemented Interfaces:
    Configurable

      public class URLPartitioner
      extends Partitioner<Text,Writable>
      implements Configurable

  Partition urls by host, domain name or IP depending on the value of the parameter 'partition.url.mode' which can be 'byHost', 'byDomain' or 'byIP'

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static String` | `PARTITION_MODE_DOMAIN`
    `static String` | `PARTITION_MODE_HOST`
    `static String` | `PARTITION_MODE_IP`
    `static String` | `PARTITION_MODE_KEY`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `URLPartitioner()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `Configuration` | `getConf()`
    `int` | `getPartition(Text key, Writable value, int numReduceTasks)` Hash by host or domain name or IP address.
    `void` | `setConf(Configuration conf)`

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

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

- - ### Field Detail

    - #### PARTITION_MODE_KEY

          public static final String PARTITION_MODE_KEY

      See Also:
        Constant Field Values

    - #### PARTITION_MODE_HOST

          public static final String PARTITION_MODE_HOST

      See Also:
        Constant Field Values

    - #### PARTITION_MODE_DOMAIN

          public static final String PARTITION_MODE_DOMAIN

      See Also:
        Constant Field Values

    - #### PARTITION_MODE_IP

          public static final String PARTITION_MODE_IP

      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### URLPartitioner

          public URLPartitioner()

  - ### Method Detail

    - #### setConf

          public void setConf(Configuration conf)

      Specified by:
        `setConf` in interface `Configurable`

    - #### getConf

          public Configuration getConf()

      Specified by:
        `getConf` in interface `Configurable`

    - #### getPartition

          public int getPartition(Text key,
                                  Writable value,
                                  int numReduceTasks)

      Hash by host or domain name or IP address.
      Specified by:
        `getPartition` in class `Partitioner<Text,Writable>`

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