alluxio.master.lineage.meta

Class LineageStoreView

java.lang.Object

alluxio.master.lineage.meta.LineageStoreView

@ThreadSafe
public final class LineageStoreView
extends Object

This class exposes a read-only view of LineageStore to checkpoint schedulers and recompute planners. TODO(yupeng): return a lineage view for protection

Constructor Summary

Constructors

Constructor and Description
LineageStoreView(LineageStore lineageStore) Creates a new instance of LineageStoreView.

Method Summary

Modifier and Type	Method and Description
List<Lineage>	getAllLineagesInTopologicalOrder()
List<Lineage>	getChildren(Lineage lineage)
List<Lineage>	getRootLineage()

Methods inherited from class java.lang.Object

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

Constructor Detail

LineageStoreView

public LineageStoreView(LineageStore lineageStore)

Creates a new instance of LineageStoreView.

Parameters:

lineageStore - the underlying lineage store to construct the view for

Method Detail

getRootLineage

public List<Lineage> getRootLineage()

Returns:

the list of all root lineages

getChildren

public List<Lineage> getChildren(Lineage lineage)
                          throws LineageDoesNotExistException

Parameters:

lineage - the lineage to get the children from

Returns:

the children lineages of a given lineage in the store

Throws:

LineageDoesNotExistException - if the lineage does not exist

getAllLineagesInTopologicalOrder

public List<Lineage> getAllLineagesInTopologicalOrder()

Returns:

all the lineages in topological order