org.apache.giraph.block_app.framework.api.giraph

Class BlockWorkerContext

java.lang.Object

org.apache.giraph.conf.DefaultImmutableClassesGiraphConfigurable<I,V,E>

org.apache.giraph.worker.WorkerAggregatorDelegator<org.apache.hadoop.io.WritableComparable,org.apache.hadoop.io.Writable,org.apache.hadoop.io.Writable>

org.apache.giraph.worker.WorkerContext

org.apache.giraph.block_app.framework.api.giraph.BlockWorkerContext

All Implemented Interfaces:

AggregatorUsage, GiraphConfigurationSettable<org.apache.hadoop.io.WritableComparable,org.apache.hadoop.io.Writable,org.apache.hadoop.io.Writable>, ImmutableClassesGiraphConfigurable<org.apache.hadoop.io.WritableComparable,org.apache.hadoop.io.Writable,org.apache.hadoop.io.Writable>, WorkerAggregatorUsage, WorkerBroadcastUsage, WorkerGlobalCommUsage, WorkerIndexUsage<org.apache.hadoop.io.WritableComparable>, WorkerReduceUsage, KryoIgnoreWritable, org.apache.hadoop.io.Writable

public final class BlockWorkerContext
extends WorkerContext
implements KryoIgnoreWritable

WorkerContext that executes receiver and sender blocks passed into BlockWorkerPieces.

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.log4j.Logger	LOG

Constructor Summary

Constructors

Constructor and Description
BlockWorkerContext()

Method Summary

Modifier and Type	Method and Description
BlockOutputHandle	getOutputHandle()
Object	getWorkerValue()
void	postApplication() Finalize the WorkerContext.
void	postSuperstep() Execute user code.
void	preApplication() Initialize the WorkerContext.
void	preSuperstep() Execute user code.
void	readFields(DataInput in)
void	write(DataOutput out)

Methods inherited from class org.apache.giraph.worker.WorkerContext

getAndClearMessagesFromOtherWorkers, getContext, getMyWorkerIndex, getSuperstep, getTotalNumEdges, getTotalNumVertices, getWorkerCount, getWorkerForVertex, logToCommandLine, sendMessageToWorker, setGraphState, setupSuperstep

Methods inherited from class org.apache.giraph.worker.WorkerAggregatorDelegator

aggregate, getAggregatedValue, getBroadcast, reduce, reduceMerge, setWorkerGlobalCommUsage

Methods inherited from class org.apache.giraph.conf.DefaultImmutableClassesGiraphConfigurable

getConf, setConf

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.apache.log4j.Logger LOG

Constructor Detail

BlockWorkerContext

public BlockWorkerContext()

Method Detail

preApplication

public void preApplication()
                    throws InstantiationException,
                           IllegalAccessException

Description copied from class: WorkerContext

Initialize the WorkerContext. This method is executed once on each Worker before the first superstep starts.

Specified by:

preApplication in class WorkerContext

Throws:

InstantiationException - Expected instantiation in this method.

IllegalAccessException - Thrown for getting the class

preSuperstep

public void preSuperstep()

Description copied from class: WorkerContext

Execute user code. This method is executed once on each Worker before each superstep starts.

Specified by:

preSuperstep in class WorkerContext

postSuperstep

public void postSuperstep()

Description copied from class: WorkerContext

Execute user code. This method is executed once on each Worker after each superstep ends.

Specified by:

postSuperstep in class WorkerContext

postApplication

public void postApplication()

Description copied from class: WorkerContext

Finalize the WorkerContext. This method is executed once on each Worker after the last superstep ends.

Specified by:

postApplication in class WorkerContext

getWorkerValue

public Object getWorkerValue()

getOutputHandle

public BlockOutputHandle getOutputHandle()

write

public void write(DataOutput out)
           throws IOException

Specified by:

write in interface org.apache.hadoop.io.Writable

Overrides:

write in class WorkerContext

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Specified by:

readFields in interface org.apache.hadoop.io.Writable

Overrides:

readFields in class WorkerContext

Throws:

IOException