alluxio.worker.block.evictor

Class EvictionPlan

java.lang.Object

alluxio.worker.block.evictor.EvictionPlan

@ThreadSafe
public final class EvictionPlan
extends Object

This class provides information about the blocks that need to be moved when evicting.

Constructor Summary

Constructors

Constructor and Description
EvictionPlan(List<BlockTransferInfo> toTransfer, List<Pair<Long,BlockStoreLocation>> toEvict) Creates a new instance of EvictionPlan.

Method Summary

Modifier and Type	Method and Description
boolean	isEmpty() Whether the plan is empty, an empty plan means both toMove and toEvict are empty, also, an empty plan indicates no action (move or evict) needs to be taken to meet the requirement.
List<Pair<Long,BlockStoreLocation>>	toEvict()
List<BlockTransferInfo>	toMove()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

EvictionPlan

public EvictionPlan(List<BlockTransferInfo> toTransfer,
                    List<Pair<Long,BlockStoreLocation>> toEvict)

Creates a new instance of EvictionPlan.

Parameters:

toTransfer - a list of block transfer information

toEvict - a list of blocks to be evicted

Method Detail

toMove

public List<BlockTransferInfo> toMove()

Returns:

a list of block transfer information, with block id, source and destination location

toEvict

public List<Pair<Long,BlockStoreLocation>> toEvict()

Returns:

a list of pairs of block id to remove and its location

isEmpty

public boolean isEmpty()

Whether the plan is empty, an empty plan means both toMove and toEvict are empty, also, an empty plan indicates no action (move or evict) needs to be taken to meet the requirement.

Returns:

true if empty otherwise false

toString

public String toString()

Overrides:

toString in class Object