alluxio.worker.block

Class BlockMapIterator

java.lang.Object

alluxio.worker.block.BlockMapIterator

All Implemented Interfaces:

Iterator<List<LocationBlockIdListEntry>>

Direct Known Subclasses:

CachingBlockMasterClient.CachingBlockMapIterator

public class BlockMapIterator
extends Object
implements Iterator<List<LocationBlockIdListEntry>>

Each iteration returns a list of LocationBlockIdListEntry which consists of blocks for one RegisterWorkerPRequest. The number of blocks included in one iteration is specified by PropertyKey.WORKER_REGISTER_STREAM_BATCH_SIZE.

Constructor Summary

Constructors

Constructor and Description
BlockMapIterator(Map<BlockStoreLocation,List<Long>> blockLocationMap) Constructor.
BlockMapIterator(Map<BlockStoreLocation,List<Long>> blockLocationMap, AlluxioConfiguration conf) Constructor.

Method Summary

Modifier and Type	Method and Description
int	getBatchCount() Gets the number of batches.
boolean	hasNext()
List<LocationBlockIdListEntry>	next()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Constructor Detail

BlockMapIterator

public BlockMapIterator(Map<BlockStoreLocation,List<Long>> blockLocationMap)

Constructor.

Parameters:

blockLocationMap - the block lists for each location

BlockMapIterator

public BlockMapIterator(Map<BlockStoreLocation,List<Long>> blockLocationMap,
                        AlluxioConfiguration conf)

Constructor.

Parameters:

blockLocationMap - the block lists for each location

conf - configuration properties

Method Detail

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<List<LocationBlockIdListEntry>>

next

public List<LocationBlockIdListEntry> next()

Specified by:

next in interface Iterator<List<LocationBlockIdListEntry>>

getBatchCount

public int getBatchCount()

Gets the number of batches.

Returns:

the count