org.apache.giraph.io.accumulo

Class AccumuloVertexOutputFormat<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.conf.DefaultImmutableClassesGiraphConfigurable<I,V,E>

org.apache.giraph.io.VertexOutputFormat<I,V,E>

org.apache.giraph.io.accumulo.AccumuloVertexOutputFormat<I,V,E>

Type Parameters:

I - vertex id type

V - vertex value type

E - edge type

All Implemented Interfaces:

GiraphConfigurationSettable<I,V,E>, ImmutableClassesGiraphConfigurable<I,V,E>

public abstract class AccumuloVertexOutputFormat<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>
extends VertexOutputFormat<I,V,E>

Class which wraps the AccumuloOutputFormat. It's designed as an extension point to VertexOutputFormat subclasses who wish to write vertices back to an Accumulo table. Works with AccumuloVertexInputFormat

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AccumuloVertexOutputFormat.AccumuloVertexWriter<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable> Main abstraction point for vertex writers to persist back to Accumulo tables.

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.accumulo.core.client.mapreduce.AccumuloOutputFormat	accumuloOutputFormat Accumulo delegate for table output
static String	OUTPUT_TABLE Output table parameter

Constructor Summary

Constructors

Constructor and Description
AccumuloVertexOutputFormat()

Method Summary

Modifier and Type	Method and Description
void	checkOutputSpecs(org.apache.hadoop.mapreduce.JobContext context) checkOutputSpecs
org.apache.hadoop.mapreduce.OutputCommitter	getOutputCommitter(org.apache.hadoop.mapreduce.TaskAttemptContext context) getOutputCommitter

Methods inherited from class org.apache.giraph.io.VertexOutputFormat

createVertexWriter

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

Field Detail

OUTPUT_TABLE

public static final String OUTPUT_TABLE

Output table parameter

See Also:

Constant Field Values

accumuloOutputFormat

protected org.apache.accumulo.core.client.mapreduce.AccumuloOutputFormat accumuloOutputFormat

Accumulo delegate for table output

Constructor Detail

AccumuloVertexOutputFormat

public AccumuloVertexOutputFormat()

Method Detail

checkOutputSpecs

public void checkOutputSpecs(org.apache.hadoop.mapreduce.JobContext context)
                      throws IOException,
                             InterruptedException

checkOutputSpecs

Specified by:

checkOutputSpecs in class VertexOutputFormat<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>

Parameters:

context - information about the job

Throws:

IOException

InterruptedException

getOutputCommitter

public org.apache.hadoop.mapreduce.OutputCommitter getOutputCommitter(org.apache.hadoop.mapreduce.TaskAttemptContext context)
                                                               throws IOException,
                                                                      InterruptedException

getOutputCommitter

Specified by:

getOutputCommitter in class VertexOutputFormat<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>

Parameters:

context - the task context

Returns:

OutputCommitter

Throws:

IOException

InterruptedException