Package com.alibaba.graphscope.example.giraph.format

Class LiveJournalEdgeInputFormat.LiveJournalEdgeReader

java.lang.Object

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

org.apache.giraph.worker.WorkerAggregatorDelegator<I,org.apache.hadoop.io.Writable,E>

org.apache.giraph.io.EdgeReader<I,E>

org.apache.giraph.io.formats.TextEdgeInputFormat.TextEdgeReader

org.apache.giraph.io.formats.TextEdgeInputFormat.TextEdgeReaderFromEachLineProcessed<String[]>

com.alibaba.graphscope.example.giraph.format.LiveJournalEdgeInputFormat.LiveJournalEdgeReader

All Implemented Interfaces:

org.apache.giraph.aggregators.AggregatorUsage, org.apache.giraph.conf.GiraphConfigurationSettable<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Writable,org.apache.hadoop.io.LongWritable>, org.apache.giraph.conf.ImmutableClassesGiraphConfigurable<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Writable,org.apache.hadoop.io.LongWritable>, org.apache.giraph.worker.WorkerAggregatorUsage, org.apache.giraph.worker.WorkerBroadcastUsage, org.apache.giraph.worker.WorkerGlobalCommUsage, org.apache.giraph.worker.WorkerReduceUsage

Enclosing class:

LiveJournalEdgeInputFormat

public class LiveJournalEdgeInputFormat.LiveJournalEdgeReader
extends TextEdgeInputFormat.TextEdgeReaderFromEachLineProcessed<String[]>

Constructor Summary

Constructors

Constructor	Description
LiveJournalEdgeReader()

Method Summary

Modifier and Type	Method	Description
protected org.apache.hadoop.io.LongWritable	getSourceVertexId(String[] line)	Reads source vertex id from the preprocessed line.
protected org.apache.hadoop.io.LongWritable	getTargetVertexId(String[] line)	Reads target vertex id from the preprocessed line.
protected org.apache.hadoop.io.LongWritable	getValue(String[] line)	Reads edge value from the preprocessed line.
protected String[]	preprocessLine(org.apache.hadoop.io.Text line)	Preprocess the line so other methods can easily read necessary information for creating edge

Methods inherited from class org.apache.giraph.io.formats.TextEdgeInputFormat.TextEdgeReaderFromEachLineProcessed

getCurrentEdge, getCurrentSourceId, nextEdge

Methods inherited from class org.apache.giraph.io.formats.TextEdgeInputFormat.TextEdgeReader

close, createLineRecordReader, getContext, getProgress, getRecordReader, initialize

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

aggregate, getAggregatedValue, getBroadcast, reduce, reduceMerge, setAggregatorManager

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

LiveJournalEdgeReader

public LiveJournalEdgeReader()

Method Detail

preprocessLine

protected String[] preprocessLine(org.apache.hadoop.io.Text line)
                           throws IOException

Preprocess the line so other methods can easily read necessary information for creating edge

Specified by:

preprocessLine in class TextEdgeInputFormat.TextEdgeReaderFromEachLineProcessed<String[]>

Parameters:

line - the current line to be read

Returns:

the preprocessed object

Throws:

IOException - exception that can be thrown while reading

getTargetVertexId

protected org.apache.hadoop.io.LongWritable getTargetVertexId(String[] line)
                                                       throws IOException

Reads target vertex id from the preprocessed line.

Specified by:

getTargetVertexId in class TextEdgeInputFormat.TextEdgeReaderFromEachLineProcessed<String[]>

Parameters:

line - the object obtained by preprocessing the line

Returns:

the target vertex id

Throws:

IOException - exception that can be thrown while reading

getSourceVertexId

protected org.apache.hadoop.io.LongWritable getSourceVertexId(String[] line)
                                                       throws IOException

Reads source vertex id from the preprocessed line.

Specified by:

getSourceVertexId in class TextEdgeInputFormat.TextEdgeReaderFromEachLineProcessed<String[]>

Parameters:

line - the object obtained by preprocessing the line

Returns:

the source vertex id

Throws:

IOException - exception that can be thrown while reading

getValue

protected org.apache.hadoop.io.LongWritable getValue(String[] line)
                                              throws IOException

Reads edge value from the preprocessed line.

Specified by:

getValue in class TextEdgeInputFormat.TextEdgeReaderFromEachLineProcessed<String[]>

Parameters:

line - the object obtained by preprocessing the line

Returns:

the edge value

Throws:

IOException - exception that can be thrown while reading