org.apache.flink.examples.java.relational

Class WebLogAnalysis.FilterVisitsByDate

java.lang.Object

org.apache.flink.examples.java.relational.WebLogAnalysis.FilterVisitsByDate

All Implemented Interfaces:

Serializable, FilterFunction<Tuple2<String,String>>, Function

Enclosing class:

WebLogAnalysis

public static class WebLogAnalysis.FilterVisitsByDate
extends Object
implements FilterFunction<Tuple2<String,String>>

MapFunction that filters for records of the visits relation where the year (from the date string) is equal to a certain value.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
FilterVisitsByDate()

Method Summary

Modifier and Type	Method and Description
boolean	filter(Tuple2<String,String> value) Filters for records of the visits relation where the year of visit is equal to a specified value.

Methods inherited from class java.lang.Object

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

Constructor Detail

FilterVisitsByDate

public FilterVisitsByDate()

Method Detail

filter

public boolean filter(Tuple2<String,String> value)
               throws Exception

Filters for records of the visits relation where the year of visit is equal to a specified value. The URL of all visit records passing the filter is emitted.

Output Format: 0: URL 1: DATE

Specified by:

filter in interface FilterFunction<Tuple2<String,String>>

Parameters:

value - The value to be filtered.

Returns:

True for values that should be retained, false for values to be filtered out.

Throws:

Exception - This method may throw exceptions. Throwing an exception will cause the operation to fail and may trigger recovery.