Package org.apache.kafka.streams.kstream.internals.foreignkeyjoin

Class SubscriptionResolverJoinProcessorSupplier<K,V,VO,VR>

java.lang.Object

org.apache.kafka.streams.kstream.internals.foreignkeyjoin.SubscriptionResolverJoinProcessorSupplier<K,V,VO,VR>

Type Parameters:

K - Type of primary keys

V - Type of primary values

VO - Type of foreign values

VR - Type of joined result of primary and foreign values

All Implemented Interfaces:

ConnectedStoreProvider, ProcessorSupplier<K,SubscriptionResponseWrapper<VO>>

public class SubscriptionResolverJoinProcessorSupplier<K,V,VO,VR>
extends java.lang.Object
implements ProcessorSupplier<K,SubscriptionResponseWrapper<VO>>

Receives SubscriptionResponseWrapper<VO> events and filters out events which do not match the current hash of the primary key. This eliminates race-condition results for rapidly-changing foreign-keys for a given primary key. Applies the join and emits nulls according to LEFT/INNER rules.

Constructor Summary

Constructors

Constructor	Description
SubscriptionResolverJoinProcessorSupplier(KTableValueGetterSupplier<K,V> valueGetterSupplier, org.apache.kafka.common.serialization.Serializer<V> valueSerializer, java.util.function.Supplier<java.lang.String> valueHashSerdePseudoTopicSupplier, ValueJoiner<V,VO,VR> joiner, boolean leftJoin)

Method Summary

Modifier and Type	Method	Description
Processor<K,SubscriptionResponseWrapper<VO>>	get()	Return a new Processor instance.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.kafka.streams.processor.ConnectedStoreProvider

stores

Constructor Detail

SubscriptionResolverJoinProcessorSupplier

public SubscriptionResolverJoinProcessorSupplier(KTableValueGetterSupplier<K,V> valueGetterSupplier,
                                                 org.apache.kafka.common.serialization.Serializer<V> valueSerializer,
                                                 java.util.function.Supplier<java.lang.String> valueHashSerdePseudoTopicSupplier,
                                                 ValueJoiner<V,VO,VR> joiner,
                                                 boolean leftJoin)

Method Detail

get

public Processor<K,SubscriptionResponseWrapper<VO>> get()

Description copied from interface: ProcessorSupplier

Return a new Processor instance.

Specified by:

get in interface ProcessorSupplier<K,V>

Returns:

a new Processor instance