org.apache.flink.api.java

Class Utils.CountHelper<T>

java.lang.Object

org.apache.flink.api.common.io.RichOutputFormat<T>

org.apache.flink.api.java.Utils.CountHelper<T>

Type Parameters:

T - Type of elements to count.

All Implemented Interfaces:

Serializable, OutputFormat<T>

Enclosing class:

Utils

public static class Utils.CountHelper<T>
extends RichOutputFormat<T>

Utility sink function that counts elements and writes the count into an accumulator, from which it can be retrieved by the client. This sink is used by the DataSet.count() function.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Utils.CountHelper(String id)

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
void	configure(Configuration parameters)
void	open(int taskNumber, int numTasks)
void	writeRecord(T record)

Methods inherited from class org.apache.flink.api.common.io.RichOutputFormat

getRuntimeContext, setRuntimeContext

Methods inherited from class java.lang.Object

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

Constructor Detail

Utils.CountHelper

public Utils.CountHelper(String id)

Method Detail

configure

public void configure(Configuration parameters)

open

public void open(int taskNumber,
        int numTasks)

writeRecord

public void writeRecord(T record)

close

public void close()