Package org.apache.flink.cep

Class CEP

java.lang.Object

org.apache.flink.cep.CEP

public class CEP
extends Object

Utility class for complex event processing.

Methods which transform a DataStream into a PatternStream to do CEP.

Constructor Summary

Constructors

Constructor	Description
CEP()

Method Summary

Modifier and Type	Method	Description
static <T> PatternStream<T>	pattern(org.apache.flink.streaming.api.datastream.DataStream<T> input, Pattern<T,?> pattern)	Creates a PatternStream from an input data stream and a pattern.
static <T> PatternStream<T>	pattern(org.apache.flink.streaming.api.datastream.DataStream<T> input, Pattern<T,?> pattern, EventComparator<T> comparator)	Creates a PatternStream from an input data stream and a pattern.

Methods inherited from class java.lang.Object

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

Constructor Detail

CEP

public CEP()

Method Detail

pattern

public static <T> PatternStream<T> pattern(org.apache.flink.streaming.api.datastream.DataStream<T> input,
                                           Pattern<T,?> pattern)

Creates a PatternStream from an input data stream and a pattern.

Type Parameters:

T - Type of the input events

Parameters:

input - DataStream containing the input events

pattern - Pattern specification which shall be detected

Returns:

Resulting pattern stream

pattern

public static <T> PatternStream<T> pattern(org.apache.flink.streaming.api.datastream.DataStream<T> input,
                                           Pattern<T,?> pattern,
                                           EventComparator<T> comparator)

Creates a PatternStream from an input data stream and a pattern.

Type Parameters:

T - Type of the input events

Parameters:

input - DataStream containing the input events

pattern - Pattern specification which shall be detected

comparator - Comparator to sort events with equal timestamps

Returns:

Resulting pattern stream