org.apache.giraph.worker

Class DefaultWorkerContext

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.worker.DefaultWorkerContext

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, org.apache.hadoop.io.Writable

Direct Known Subclasses:

AggregatorsBenchmark.AggregatorsBenchmarkWorkerContext, ReducersBenchmark.ReducersBenchmarkWorkerContext, TestComputationStateComputation.TestComputationStateWorkerContext

public class DefaultWorkerContext
extends WorkerContext

A dummy implementation of WorkerContext. This is the default implementation when no WorkerContext is defined by the user. It does nothing.

Constructor Summary

Constructors

Constructor and Description
DefaultWorkerContext()

Method Summary

Modifier and Type	Method and Description
void	postApplication() Finalize the WorkerContext.
void	postSuperstep() Execute user code.
void	preApplication() Initialize the WorkerContext.
void	preSuperstep() Execute user code.

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

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

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

Constructor Detail

DefaultWorkerContext

public DefaultWorkerContext()

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

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

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