org.apache.nutch.db
Class DBKeyDivision

java.lang.Object
  org.apache.nutch.db.DBKeyDivision

public class DBKeyDivision

extends Object

DBKeyDivision exists for other DB classes to figure out how to find the right distributed-DB section.

Author:

Mike Cafarella

Field Summary

static int	MAX_SECTIONS
static MD5Hash[]	MD5_KEYSPACE_DIVIDERS
static String[]	URL_KEYSPACE_DIVIDERS

Constructor Summary

DBKeyDivision()

Method Summary

static int	findMD5Section(MD5Hash md5, int numSections) Find the right section index for the given MD5, and the number of sections in the db overall.
static int	findURLSection(String url, int numSections) Find the right section index for the given URL, and the number of sections in the db overall.

Methods inherited from class java.lang.Object

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

Field Detail

URL_KEYSPACE_DIVIDERS

public static String[] URL_KEYSPACE_DIVIDERS

MD5_KEYSPACE_DIVIDERS

public static MD5Hash[] MD5_KEYSPACE_DIVIDERS

MAX_SECTIONS

public static int MAX_SECTIONS

Constructor Detail

DBKeyDivision

public DBKeyDivision()

Method Detail

findURLSection

public static int findURLSection(String url,
                                 int numSections)

Find the right section index for the given URL, and the number of sections in the db overall.

findMD5Section

public static int findMD5Section(MD5Hash md5,
                                 int numSections)

Find the right section index for the given MD5, and the number of sections in the db overall.