org.apache.giraph.io.superstep_output

Class NoOpSuperstepOutput<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>

java.lang.Object

org.apache.giraph.io.superstep_output.NoOpSuperstepOutput<I,V,E>

Type Parameters:

I - Vertex id

V - Vertex value

E - Edge value

All Implemented Interfaces:

SuperstepOutput<I,V,E>

public class NoOpSuperstepOutput<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>
extends Object
implements SuperstepOutput<I,V,E>

Class to use as SuperstepOutput when we don't have output during computation. All the methods are no-ops.

Constructor Summary

Constructors

Constructor and Description
NoOpSuperstepOutput()

Method Summary

Modifier and Type	Method and Description
SimpleVertexWriter<I,V,E>	getVertexWriter() Get the Writer.
void	postApplication() Finalize this output in the end of the application
void	returnVertexWriter(SimpleVertexWriter<I,V,E> vertexWriter) Return the Writer after usage, which you got by calling SuperstepOutput.getVertexWriter()

Methods inherited from class java.lang.Object

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

Constructor Detail

NoOpSuperstepOutput

public NoOpSuperstepOutput()

Method Detail

getVertexWriter

public SimpleVertexWriter<I,V,E> getVertexWriter()

Description copied from interface: SuperstepOutput

Get the Writer. You have to return it after usage in order for it to be properly closed.

Specified by:

getVertexWriter in interface SuperstepOutput<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>

Returns:

SimpleVertexWriter

returnVertexWriter

public void returnVertexWriter(SimpleVertexWriter<I,V,E> vertexWriter)

Description copied from interface: SuperstepOutput

Return the Writer after usage, which you got by calling SuperstepOutput.getVertexWriter()

Specified by:

returnVertexWriter in interface SuperstepOutput<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>

Parameters:

vertexWriter - SimpleVertexWriter which you are returning

postApplication

public void postApplication()

Description copied from interface: SuperstepOutput

Finalize this output in the end of the application

Specified by:

postApplication in interface SuperstepOutput<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>