io.wizzie.normalizer.funcs

Class MapperStoreFunction

java.lang.Object

io.wizzie.normalizer.funcs.MapperStoreFunction

All Implemented Interfaces:

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

Direct Known Subclasses:

DiffCounterStoreMapper

public abstract class MapperStoreFunction
extends Object
implements Function<org.apache.kafka.streams.KeyValue<String,Map<String,Object>>>, org.apache.kafka.streams.kstream.Transformer<String,Map<String,Object>,org.apache.kafka.streams.KeyValue<String,Map<String,Object>>>

This class is used to do a mapper process, but it offers a key value store to operate with multiples states

Constructor Summary

Constructors

Constructor and Description
MapperStoreFunction()

Method Summary

Modifier and Type	Method and Description
void	close() Close all opened stores and stop process
List<String>	getAvailableStores() Allow to get a list of available stores
<V> org.apache.kafka.streams.state.KeyValueStore<String,V>	getStore(String storeName) Allow to get a KeyValue store of its name
void	init(Map<String,Object> properties, io.wizzie.metrics.MetricsManager metricsManager) Initialize mapper store function
void	init(org.apache.kafka.streams.processor.ProcessorContext context) Inialize mapper store function
org.apache.kafka.streams.KeyValue<String,Map<String,Object>>	punctuate(long timestamp)
org.apache.kafka.streams.KeyValue<String,Map<String,Object>>	transform(String key, Map<String,Object> value) Process a Key-Value message of Kafka
abstract org.apache.kafka.streams.KeyValue<String,Map<String,Object>>	window(long timestamp) This method allow implement window calls

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

MapperStoreFunction

public MapperStoreFunction()

Method Detail

init

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

Initialize mapper store function

Specified by:

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

Parameters:

properties - Properties for mapper store function

metricsManager - MetricsManager object for mapper store function

init

public void init(org.apache.kafka.streams.processor.ProcessorContext context)

Inialize mapper store function

Specified by:

init in interface org.apache.kafka.streams.kstream.Transformer<String,Map<String,Object>,org.apache.kafka.streams.KeyValue<String,Map<String,Object>>>

Parameters:

context - The context of processor for mapper store function

transform

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

Process a Key-Value message of Kafka

Specified by:

transform in interface org.apache.kafka.streams.kstream.Transformer<String,Map<String,Object>,org.apache.kafka.streams.KeyValue<String,Map<String,Object>>>

Parameters:

key - The key of Kafka message

value - The value of Kafka message

Returns:

A Key-Value message after process

close

public void close()

Close all opened stores and stop process

Specified by:

close in interface org.apache.kafka.streams.kstream.Transformer<String,Map<String,Object>,org.apache.kafka.streams.KeyValue<String,Map<String,Object>>>

getAvailableStores

public List<String> getAvailableStores()

Allow to get a list of available stores

Returns:

List of available stores

getStore

public <V> org.apache.kafka.streams.state.KeyValueStore<String,V> getStore(String storeName)

Allow to get a KeyValue store of its name

Type Parameters:

V - Value Type

Parameters:

storeName - Name of Key-Value store

Returns:

A Key-Value store

window

public abstract org.apache.kafka.streams.KeyValue<String,Map<String,Object>> window(long timestamp)

This method allow implement window calls

Parameters:

timestamp - where the window must be called

Returns:

A messages that are added to the current stream

punctuate

public org.apache.kafka.streams.KeyValue<String,Map<String,Object>> punctuate(long timestamp)

Specified by:

punctuate in interface org.apache.kafka.streams.kstream.Transformer<String,Map<String,Object>,org.apache.kafka.streams.KeyValue<String,Map<String,Object>>>