org.apache.hama.graph

Interface VertexOutputWriter<KEYOUT extends org.apache.hadoop.io.Writable,VALUEOUT 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>

Type Parameters:

KEYOUT - the key output type.

VALUEOUT - the value output type.

V - the vertexID type.

E - the edge value type.

M - the vertex value type.

All Known Implementing Classes:

DefaultVertexOutputWriter

public interface VertexOutputWriter<KEYOUT extends org.apache.hadoop.io.Writable,VALUEOUT 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>

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

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,KEYOUT,VALUEOUT,GraphJobMessage> peer) Write is called for every vertex in the list.

Method Detail

setup

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

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

write

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

Write is called for every vertex in the list.

Parameters:

vertex - the user defined vertex.

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

Throws:

IOException