org.apache.flink.graph.library.metric

Class ChecksumHashCode<K,VV,EV>

java.lang.Object

org.apache.flink.graph.GraphAnalyticBase<K,VV,EV,ChecksumHashCode.Checksum>

org.apache.flink.graph.library.metric.ChecksumHashCode<K,VV,EV>

Type Parameters:

K - graph ID type

VV - vertex value type

EV - edge value type

All Implemented Interfaces:

GraphAnalytic<K,VV,EV,ChecksumHashCode.Checksum>

public class ChecksumHashCode<K,VV,EV>
extends GraphAnalyticBase<K,VV,EV,ChecksumHashCode.Checksum>

Convenience method to get the count (number of elements) of a Graph as well as the checksum (sum over element hashes). The vertex and edge DataSets are processed in a single job and the resultant counts and checksums are merged locally.

Field Summary

Fields inherited from class org.apache.flink.graph.GraphAnalyticBase

env, parallelism

Constructor Summary

Constructors

Constructor and Description
ChecksumHashCode()

Method Summary

Modifier and Type	Method and Description
ChecksumHashCode.Checksum	getResult() This method must be called after the program has executed.
ChecksumHashCode<K,VV,EV>	run(Graph<K,VV,EV> input) All GraphAnalytic processing must be terminated by an OutputFormat.

Methods inherited from class org.apache.flink.graph.GraphAnalyticBase

execute, execute, setParallelism

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ChecksumHashCode

public ChecksumHashCode()

Method Detail

run

public ChecksumHashCode<K,VV,EV> run(Graph<K,VV,EV> input)
                              throws Exception

Description copied from interface: GraphAnalytic

All GraphAnalytic processing must be terminated by an OutputFormat. Rather than obtained via accumulators rather than returned by a DataSet.

Specified by:

run in interface GraphAnalytic<K,VV,EV,ChecksumHashCode.Checksum>

Overrides:

run in class GraphAnalyticBase<K,VV,EV,ChecksumHashCode.Checksum>

Parameters:

input - input graph

Returns:

this

Throws:

Exception

getResult

public ChecksumHashCode.Checksum getResult()

Description copied from interface: GraphAnalytic

This method must be called after the program has executed. 1) "run" analytics and algorithms 2) call ExecutionEnvironment.execute() 3) get analytic results

Returns:

the result