Package io.hgraphdb.giraph

Class HBaseVertexOutputFormat.HBaseVertexWriter

java.lang.Object

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

org.apache.giraph.io.VertexWriter<ObjectWritable,VertexValueWritable,org.apache.hadoop.io.Writable>

io.hgraphdb.giraph.HBaseVertexOutputFormat.HBaseVertexWriter

All Implemented Interfaces:

org.apache.giraph.conf.GiraphConfigurationSettable<ObjectWritable,VertexValueWritable,org.apache.hadoop.io.Writable>, org.apache.giraph.conf.ImmutableClassesGiraphConfigurable<ObjectWritable,VertexValueWritable,org.apache.hadoop.io.Writable>, org.apache.giraph.io.SimpleVertexWriter<ObjectWritable,VertexValueWritable,org.apache.hadoop.io.Writable>

Enclosing class:

HBaseVertexOutputFormat

public abstract static class HBaseVertexOutputFormat.HBaseVertexWriter
extends org.apache.giraph.io.VertexWriter<ObjectWritable,VertexValueWritable,org.apache.hadoop.io.Writable>

Constructor

Simple class which takes an instance of RecordWriter over Writable objects. Subclasses are expected to implement writeVertex()

Constructor Summary

Constructors

Constructor	Description
HBaseVertexWriter(org.apache.hadoop.mapreduce.TaskAttemptContext context)	Sets up base table output format and creates a record writer.

Method Summary

Modifier and Type	Method	Description
void	close(org.apache.hadoop.mapreduce.TaskAttemptContext context)	close
org.apache.hadoop.mapreduce.TaskAttemptContext	getContext()	getContext
HBaseBulkLoader	getWriter()	Get the writer
void	initialize(org.apache.hadoop.mapreduce.TaskAttemptContext context)	initialize
abstract void	writeVertex(HBaseBulkLoader writer, HBaseVertex vertex, org.apache.hadoop.io.Writable value)
void	writeVertex(org.apache.giraph.graph.Vertex<ObjectWritable,VertexValueWritable,org.apache.hadoop.io.Writable> vertex)

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

HBaseVertexWriter

public HBaseVertexWriter(org.apache.hadoop.mapreduce.TaskAttemptContext context)

Sets up base table output format and creates a record writer.

Parameters:

context - task attempt context

Method Detail

initialize

public void initialize(org.apache.hadoop.mapreduce.TaskAttemptContext context)
                throws IOException

initialize

Specified by:

initialize in class org.apache.giraph.io.VertexWriter<ObjectWritable,VertexValueWritable,org.apache.hadoop.io.Writable>

Parameters:

context - Context used to write the vertices.

Throws:

IOException

close

public void close(org.apache.hadoop.mapreduce.TaskAttemptContext context)
           throws IOException,
                  InterruptedException

close

Specified by:

close in class org.apache.giraph.io.VertexWriter<ObjectWritable,VertexValueWritable,org.apache.hadoop.io.Writable>

Parameters:

context - the context of the task

Throws:

IOException

InterruptedException

getWriter

public HBaseBulkLoader getWriter()

Get the writer

Returns:

Bulk loader to be used for writing.

getContext

public org.apache.hadoop.mapreduce.TaskAttemptContext getContext()

getContext

Returns:

Context passed to initialize.

writeVertex

public void writeVertex(org.apache.giraph.graph.Vertex<ObjectWritable,VertexValueWritable,org.apache.hadoop.io.Writable> vertex)
                 throws IOException,
                        InterruptedException

Throws:

IOException

InterruptedException

writeVertex

public abstract void writeVertex(HBaseBulkLoader writer,
                                 HBaseVertex vertex,
                                 org.apache.hadoop.io.Writable value)