org.apache.giraph.ooc.command

Class LoadPartitionIOCommand

java.lang.Object

org.apache.giraph.ooc.command.IOCommand

org.apache.giraph.ooc.command.LoadPartitionIOCommand

public class LoadPartitionIOCommand
extends IOCommand

IOCommand to load partition data, edge data (if in INPUT_SUPERSTEP), and message data (if in compute supersteps). Also, this command can be used to prefetch a partition to be processed in the next superstep.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.giraph.ooc.command.IOCommand

IOCommand.IOCommandType

Field Summary

Fields inherited from class org.apache.giraph.ooc.command.IOCommand

numBytesTransferred, oocEngine, partitionId

Constructor Summary

Constructors

Constructor and Description
LoadPartitionIOCommand(OutOfCoreEngine oocEngine, int partitionId, long superstep) Constructor

Method Summary

Modifier and Type	Method and Description
boolean	execute() Execute (load/store of data) the IO command, and change the data stores appropriately based on the data loaded/stored.
IOCommand.IOCommandType	getType() Get the type of the command.
String	toString()

Methods inherited from class org.apache.giraph.ooc.command.IOCommand

bytesTransferred, getPartitionId

Methods inherited from class java.lang.Object

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

Constructor Detail

LoadPartitionIOCommand

public LoadPartitionIOCommand(OutOfCoreEngine oocEngine,
                              int partitionId,
                              long superstep)

Constructor

Parameters:

oocEngine - out-of-core engine

partitionId - id of the partition to be loaded

superstep - superstep to load the partition for

Method Detail

execute

public boolean execute()
                throws IOException

Description copied from class: IOCommand

Execute (load/store of data) the IO command, and change the data stores appropriately based on the data loaded/stored. Return true iff the command is actually executed (resulted in loading or storing data).

Specified by:

execute in class IOCommand

Returns:

whether the command is actually executed

Throws:

IOException

getType

public IOCommand.IOCommandType getType()

Description copied from class: IOCommand

Get the type of the command.

Specified by:

getType in class IOCommand

Returns:

type of the command

toString

public String toString()

Overrides:

toString in class Object