Package org.apache.nutch.crawl

Crawl control code.

See:
Description

Interface Summary

FetchSchedule

This interface defines the contract for implementations that manipulate fetch times and re-fetch intervals.

Class Summary

AbstractFetchSchedule	This class provides common methods for implementations of FetchSchedule.
AdaptiveFetchSchedule	This class implements an adaptive re-fetch algorithm.
Crawl
CrawlDatum
CrawlDatum.Comparator	A Comparator optimized for CrawlDatum.
CrawlDb	This class takes the output of the fetcher and updates the crawldb accordingly.
CrawlDbFilter	This class provides a way to separate the URL normalization and filtering steps from the rest of CrawlDb manipulation code.
CrawlDbMerger	This tool merges several CrawlDb-s into one, optionally filtering URLs through the current URLFilters, to skip prohibited pages.
CrawlDbMerger.Merger
CrawlDbReader	Read utility for the CrawlDB.
CrawlDbReader.CrawlDatumCsvOutputFormat
CrawlDbReader.CrawlDatumCsvOutputFormat.LineRecordWriter
CrawlDbReader.CrawlDbStatCombiner
CrawlDbReader.CrawlDbStatMapper
CrawlDbReader.CrawlDbStatReducer
CrawlDbReader.CrawlDbTopNMapper
CrawlDbReader.CrawlDbTopNReducer
CrawlDbReducer	Merge new page entries with existing entries.
DefaultFetchSchedule	This class implements the default re-fetch schedule.
FetchScheduleFactory	Creates and caches a FetchSchedule implementation.
Generator	Generates a subset of a crawl db to fetch.
Generator.CrawlDbUpdater	Update the CrawlDB so that the next generate won't include the same URLs.
Generator.DecreasingFloatComparator
Generator.HashComparator	Sort fetch lists by hash of URL.
Generator.PartitionReducer
Generator.Selector	Selects entries due for fetch.
Generator.SelectorEntry
Generator.SelectorInverseMapper
Injector	This class takes a flat file of URLs and adds them to the of pages to be crawled.
Injector.InjectMapper	Normalize and filter injected urls.
Injector.InjectReducer	Combine multiple new entries for a url.
Inlink
Inlinks	A list of Inlinks.
LinkDb	Maintains an inverted link map, listing incoming links for each url.
LinkDbFilter	This class provides a way to separate the URL normalization and filtering steps from the rest of LinkDb manipulation code.
LinkDbMerger	This tool merges several LinkDb-s into one, optionally filtering URLs through the current URLFilters, to skip prohibited URLs and links.
LinkDbReader	.
MapWritable	A writable map, with a similar behavior as java.util.HashMap.
MD5Signature	Default implementation of a page signature.
NutchWritable
PartitionUrlByHost	Partition urls by hostname.
Signature
SignatureComparator
SignatureFactory	Factory class, which instantiates a Signature implementation according to the current Configuration configuration.
TextProfileSignature	An implementation of a page signature.

Package org.apache.nutch.crawl Description

Crawl control code.