bt.torrent.selector

Class RarestFirstSelector

java.lang.Object

bt.torrent.selector.RarestFirstSelector

All Implemented Interfaces:

PieceSelector

Direct Known Subclasses:

RandomizedRarestFirstSelector

public class RarestFirstSelector
extends Object
implements PieceSelector

Constructor Summary

Constructors

Constructor and Description
RarestFirstSelector()

Method Summary

Modifier and Type	Method and Description
protected int	getIterationIdx(int i)
IntStream	getNextPieces(BitSet relevantChunks, PieceStatistics pieceStatistics) Select pieces based on the chunks which are relevant.
static RarestFirstSelector	randomizedRarest() Randomized rarest-first selector.
static RarestFirstSelector	rarest() Regular rarest-first selector.

Methods inherited from class java.lang.Object

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

Methods inherited from interface bt.torrent.selector.PieceSelector

initSelector

Constructor Detail

RarestFirstSelector

public RarestFirstSelector()

Method Detail

rarest

public static RarestFirstSelector rarest()

Regular rarest-first selector. Selects whichever pieces that are the least available (strictly following the order of increasing availability).

Since:

1.1

randomizedRarest

public static RarestFirstSelector randomizedRarest()

Randomized rarest-first selector. Selects one of the least available pieces randomly (which means that it does not always select THE least available piece, but rather looks at some number N of the least available pieces and then randomly picks one of them).

Since:

1.1

getNextPieces

public IntStream getNextPieces(BitSet relevantChunks,
                               PieceStatistics pieceStatistics)

Description copied from interface: PieceSelector

Select pieces based on the chunks which are relevant. Relevant means that the peer we are selecting pieces for has this chunk and we do not have this chunk locally

Specified by:

getNextPieces in interface PieceSelector

Parameters:

relevantChunks - the relevant chunks to chose (in the peer's completed list,

pieceStatistics - the piece statistics

Returns:

the stream of the next pieces to get

getIterationIdx

protected int getIterationIdx(int i)