Package org.apache.kafka.streams.processor.api

Class ContextualFixedKeyProcessor<KIn,VIn,VOut>

java.lang.Object

org.apache.kafka.streams.processor.api.ContextualFixedKeyProcessor<KIn,VIn,VOut>

Type Parameters:

KIn - the type of input keys

VIn - the type of input values

VOut - the type of output values

All Implemented Interfaces:

FixedKeyProcessor<KIn,VIn,VOut>

public abstract class ContextualFixedKeyProcessor<KIn,VIn,VOut>
extends Object
implements FixedKeyProcessor<KIn,VIn,VOut>

An abstract implementation of FixedKeyProcessor that manages the FixedKeyProcessorContext instance and provides default no-op implementation of FixedKeyProcessor.close().

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ContextualFixedKeyProcessor()

Method Summary

Modifier and Type	Method	Description
protected final FixedKeyProcessorContext<KIn,VOut>	context()	Get the processor's context set during initialization.
void	init(FixedKeyProcessorContext<KIn,VOut> context)	Initialize this processor with the given context.

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.api.FixedKeyProcessor

close, process

Constructor Details

ContextualFixedKeyProcessor

protected ContextualFixedKeyProcessor()

Method Details

init

public void init(FixedKeyProcessorContext<KIn,VOut> context)

Description copied from interface: FixedKeyProcessor

Initialize this processor with the given context. The framework ensures this is called once per processor when the topology that contains it is initialized. When the framework is done with the processor, FixedKeyProcessor.close() will be called on it; the framework may later re-use the processor by calling #init() again.

The provided context can be used to access topology and record metadata, to schedule a method to be called periodically and to access attached StateStores.

Specified by:

init in interface FixedKeyProcessor<KIn,VIn,VOut>

Parameters:

context - the context; may not be null

context

protected final FixedKeyProcessorContext<KIn,VOut> context()

Get the processor's context set during initialization.

Returns:

the processor context; null only when called prior to initialization.