io.wizzie.normalizer.funcs

Class FlatMapperFunction

java.lang.Object

io.wizzie.normalizer.funcs.FlatMapperFunction

All Implemented Interfaces:

Function<Iterable<org.apache.kafka.streams.KeyValue<String,Map<String,Object>>>>, org.apache.kafka.streams.kstream.KeyValueMapper<String,Map<String,Object>,Iterable<org.apache.kafka.streams.KeyValue<String,Map<String,Object>>>>

Direct Known Subclasses:

ArrayFlattenMapper, FormatterFlatMapper, JqFlatMapper, SplitterFlatMapper

public abstract class FlatMapperFunction
extends Object
implements Function<Iterable<org.apache.kafka.streams.KeyValue<String,Map<String,Object>>>>, org.apache.kafka.streams.kstream.KeyValueMapper<String,Map<String,Object>,Iterable<org.apache.kafka.streams.KeyValue<String,Map<String,Object>>>>

This class is used to implement flat-mapper process where you can generate zero or more messages from one message

Constructor Summary

Constructors

Constructor and Description
FlatMapperFunction()

Method Summary

Modifier and Type	Method and Description
Iterable<org.apache.kafka.streams.KeyValue<String,Map<String,Object>>>	apply(String key, Map<String,Object> value) Apply a flat mapper function to Key-Value Kafka message
void	init(Map<String,Object> properties, io.wizzie.metrics.MetricsManager metricsManager) Initialize flat mapper function

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.wizzie.normalizer.funcs.Function

prepare, process, stop

Constructor Detail

FlatMapperFunction

public FlatMapperFunction()

Method Detail

init

public void init(Map<String,Object> properties,
                 io.wizzie.metrics.MetricsManager metricsManager)

Initialize flat mapper function

Specified by:

init in interface Function<Iterable<org.apache.kafka.streams.KeyValue<String,Map<String,Object>>>>

Parameters:

properties - Properties for flat mapper function

metricsManager - MetricsManager object for flat mapper function

apply

public Iterable<org.apache.kafka.streams.KeyValue<String,Map<String,Object>>> apply(String key,
                                                                                    Map<String,Object> value)

Apply a flat mapper function to Key-Value Kafka message

Specified by:

apply in interface org.apache.kafka.streams.kstream.KeyValueMapper<String,Map<String,Object>,Iterable<org.apache.kafka.streams.KeyValue<String,Map<String,Object>>>>

Parameters:

key - The key of Kafka message

value - The value of Kafka message

Returns:

A Iterable object with Kafka messages after apply flat mapper