org.apache.giraph.io.hcatalog

Class HCatalogVertexValueInputFormat.SingleRowHCatalogVertexValueReader

java.lang.Object

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

org.apache.giraph.worker.WorkerAggregatorDelegator<I,V,E>

org.apache.giraph.io.VertexReader<I,V,org.apache.hadoop.io.Writable>

org.apache.giraph.io.BasicVertexValueReader<I,V>

org.apache.giraph.io.VertexValueReader<I,V>

org.apache.giraph.io.hcatalog.HCatalogVertexValueInputFormat.HCatalogVertexValueReader

org.apache.giraph.io.hcatalog.HCatalogVertexValueInputFormat.SingleRowHCatalogVertexValueReader

All Implemented Interfaces:

AggregatorUsage, GiraphConfigurationSettable<I,V,org.apache.hadoop.io.Writable>, ImmutableClassesGiraphConfigurable<I,V,org.apache.hadoop.io.Writable>, WorkerAggregatorUsage, WorkerBroadcastUsage, WorkerGlobalCommUsage, WorkerReduceUsage

Enclosing class:

HCatalogVertexValueInputFormat<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable>

protected abstract class HCatalogVertexValueInputFormat.SingleRowHCatalogVertexValueReader
extends HCatalogVertexValueInputFormat.HCatalogVertexValueReader

HCatalogVertexValueInputFormat.HCatalogVertexValueReader for tables holding a complete vertex value in each row.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SingleRowHCatalogVertexValueReader()

Method Summary

Modifier and Type	Method and Description
I	getCurrentVertexId() User-defined method to extract the vertex id.
V	getCurrentVertexValue() User-defined method to extract the vertex value.
protected abstract I	getVertexId(org.apache.hcatalog.data.HCatRecord record) Get vertex id from a record.
protected abstract V	getVertexValue(org.apache.hcatalog.data.HCatRecord record) Get vertex value from a record.

Methods inherited from class org.apache.giraph.io.hcatalog.HCatalogVertexValueInputFormat.HCatalogVertexValueReader

close, getContext, getProgress, getRecordReader, initialize, nextVertex

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

getCurrentVertex

Methods inherited from class org.apache.giraph.worker.WorkerAggregatorDelegator

aggregate, getAggregatedValue, getBroadcast, reduce, reduceMerge, setWorkerGlobalCommUsage

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

SingleRowHCatalogVertexValueReader

protected SingleRowHCatalogVertexValueReader()

Method Detail

getVertexId

protected abstract I getVertexId(org.apache.hcatalog.data.HCatRecord record)

Get vertex id from a record.

Parameters:

record - Input record

Returns:

I Vertex id

getVertexValue

protected abstract V getVertexValue(org.apache.hcatalog.data.HCatRecord record)

Get vertex value from a record.

Parameters:

record - Input record

Returns:

V Vertex value

getCurrentVertexId

public final I getCurrentVertexId()
                           throws IOException,
                                  InterruptedException

Description copied from class: BasicVertexValueReader

User-defined method to extract the vertex id.

Specified by:

getCurrentVertexId in class BasicVertexValueReader<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable>

Returns:

The vertex id

Throws:

IOException

InterruptedException

getCurrentVertexValue

public final V getCurrentVertexValue()
                              throws IOException,
                                     InterruptedException

Description copied from class: BasicVertexValueReader

User-defined method to extract the vertex value.

Specified by:

getCurrentVertexValue in class BasicVertexValueReader<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable>

Returns:

The vertex value

Throws:

IOException

InterruptedException