org.apache.hama.graph

Class DefaultVertexOutputWriter<V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>

java.lang.Object

org.apache.hama.graph.DefaultVertexOutputWriter<V,E,M>

Type Parameters:

V - the vertexID type.

E - the edge value type.

M - the vertex value type.

All Implemented Interfaces:

VertexOutputWriter<V,M,V,E,M>

public class DefaultVertexOutputWriter<V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>
extends Object
implements VertexOutputWriter<V,M,V,E,M>

The VertexOutputWriter defines what parts of the vertex shall be written to the output format.

Constructor Summary

Constructors

Constructor and Description
DefaultVertexOutputWriter()

Method Summary

Methods

Modifier and Type	Method and Description
void	setup(org.apache.hadoop.conf.Configuration conf) Used to setup this output writer.
void	write(Vertex<V,E,M> vertex, BSPPeer<org.apache.hadoop.io.Writable,org.apache.hadoop.io.Writable,V,M,GraphJobMessage> peer) Write is called for every vertex in the list.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultVertexOutputWriter

public DefaultVertexOutputWriter()

Method Detail

setup

public void setup(org.apache.hadoop.conf.Configuration conf)

Description copied from interface: VertexOutputWriter

Used to setup this output writer. This will be called right before the first call to write.

Specified by:

setup in interface VertexOutputWriter<V extends org.apache.hadoop.io.WritableComparable,M extends org.apache.hadoop.io.Writable,V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>

write

public void write(Vertex<V,E,M> vertex,
         BSPPeer<org.apache.hadoop.io.Writable,org.apache.hadoop.io.Writable,V,M,GraphJobMessage> peer)
           throws IOException

Description copied from interface: VertexOutputWriter

Write is called for every vertex in the list.

Specified by:

write in interface VertexOutputWriter<V extends org.apache.hadoop.io.WritableComparable,M extends org.apache.hadoop.io.Writable,V extends org.apache.hadoop.io.WritableComparable,E extends org.apache.hadoop.io.Writable,M extends org.apache.hadoop.io.Writable>

Parameters:

vertex - the user defined vertex.

peer - the peer that has methods to write to the output sink.

Throws:

IOException