org.apache.nutch.tools
Class FetchListTool

java.lang.Object
  org.apache.nutch.tools.FetchListTool

public class FetchListTool

extends Object

This class takes an IWebDBReader, computes a relevant subset, and then emits the subset.

Author:

Mike Cafarella

Nested Class Summary

static class

FetchListTool.SortableScore SortableScore is just a WritableComparable Float!

Field Summary

static Logger

LOG

Constructor Summary

FetchListTool(NutchFileSystem nfs, File dbDir, boolean refetchOnly, float cutoffScore, int seed)
FetchListTool takes a page db, and emits a RECNO-based subset of it.

Method Summary

void	emitFetchList(File segmentDir, long topN, long curTime) Spit out the fetchlist, to a BDB at the indicated filename.
void	emitMultipleLists(File dir, int numLists, long topN, long curTime) Spit out several fetchlists, so that we can fetch across several machines.
static void	main(String[] argv) Generate a fetchlist from the pagedb and linkdb

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final Logger LOG

Constructor Detail

FetchListTool

public FetchListTool(NutchFileSystem nfs,
                     File dbDir,
                     boolean refetchOnly,
                     float cutoffScore,
                     int seed)
              throws IOException,
                     FileNotFoundException

FetchListTool takes a page db, and emits a RECNO-based subset of it.

Method Detail

emitMultipleLists

public void emitMultipleLists(File dir,
                              int numLists,
                              long topN,
                              long curTime)
                       throws IOException

Spit out several fetchlists, so that we can fetch across several machines.

Throws:

IOException

emitFetchList

public void emitFetchList(File segmentDir,
                          long topN,
                          long curTime)
                   throws IOException

Spit out the fetchlist, to a BDB at the indicated filename.

Throws:

IOException

main

public static void main(String[] argv)
                 throws IOException,
                        FileNotFoundException

Generate a fetchlist from the pagedb and linkdb

Throws:

IOException

FileNotFoundException