Package org.springframework.kafka.support.serializer

Class DelegatingDeserializer

java.lang.Object

org.springframework.kafka.support.serializer.DelegatingDeserializer

All Implemented Interfaces:

Closeable, AutoCloseable, org.apache.kafka.common.serialization.Deserializer<Object>

public class DelegatingDeserializer
extends Object
implements org.apache.kafka.common.serialization.Deserializer<Object>

A Deserializer that delegates to other deserializers based on a serialization selector header. It is not necessary to configure standard deserializers supported by Serdes.

Since:

2.3

Author:

Gary Russell

Constructor Summary

Constructors

Constructor	Description
DelegatingDeserializer()	Construct an instance that will be configured in configure(Map, boolean) with consumer properties DelegatingSerializer.KEY_SERIALIZATION_SELECTOR_CONFIG and DelegatingSerializer.VALUE_SERIALIZATION_SELECTOR_CONFIG.
DelegatingDeserializer(Map<String,org.apache.kafka.common.serialization.Deserializer<?>> delegates)	Construct an instance with the supplied mapping of selectors to delegate deserializers.

Method Summary

Modifier and Type	Method	Description
void	addDelegate(String selector, org.apache.kafka.common.serialization.Deserializer<?> deserializer)
void	close()
void	configure(Map<String,?> configs, boolean isKey)
protected static Map<String,org.apache.kafka.common.serialization.Deserializer<?>>	createDelegates(String mappings, Map<String,?> configs, boolean isKey)
protected static void	createInstanceAndConfigure(Map<String,?> configs, boolean isKey, Map<String,org.apache.kafka.common.serialization.Deserializer<?>> delegateMap, String selector, String className)
Object	deserialize(String topic, byte[] data)
Object	deserialize(String topic, org.apache.kafka.common.header.Headers headers, byte[] data)
protected static void	instantiateAndConfigure(Map<String,?> configs, boolean isKey, Map<String,org.apache.kafka.common.serialization.Deserializer<?>> delegateMap, String selector, Class<?> clazz)
org.apache.kafka.common.serialization.Deserializer<?>	removeDelegate(String selector)

Methods inherited from class java.lang.Object

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

Constructor Details

DelegatingDeserializer

public DelegatingDeserializer()

Construct an instance that will be configured in configure(Map, boolean) with consumer properties DelegatingSerializer.KEY_SERIALIZATION_SELECTOR_CONFIG and DelegatingSerializer.VALUE_SERIALIZATION_SELECTOR_CONFIG.

DelegatingDeserializer

public DelegatingDeserializer(Map<String,org.apache.kafka.common.serialization.Deserializer<?>> delegates)

Construct an instance with the supplied mapping of selectors to delegate deserializers. The selector must be supplied in the DelegatingSerializer.KEY_SERIALIZATION_SELECTOR_CONFIG and DelegatingSerializer.VALUE_SERIALIZATION_SELECTOR_CONFIG headers. It is not necessary to configure standard deserializers supported by Serdes.

Parameters:

delegates - the map of delegates.

Method Details

configure

public void configure(Map<String,?> configs,
 boolean isKey)

Specified by:

configure in interface org.apache.kafka.common.serialization.Deserializer<Object>

createDelegates

protected static Map<String,org.apache.kafka.common.serialization.Deserializer<?>> createDelegates(String mappings,
 Map<String,?> configs,
 boolean isKey)

createInstanceAndConfigure

protected static void createInstanceAndConfigure(Map<String,?> configs,
 boolean isKey,
 Map<String,org.apache.kafka.common.serialization.Deserializer<?>> delegateMap,
 String selector,
 String className)

instantiateAndConfigure

protected static void instantiateAndConfigure(Map<String,?> configs,
 boolean isKey,
 Map<String,org.apache.kafka.common.serialization.Deserializer<?>> delegateMap,
 String selector,
 Class<?> clazz)

addDelegate

public void addDelegate(String selector,
 org.apache.kafka.common.serialization.Deserializer<?> deserializer)

removeDelegate

@Nullable
public org.apache.kafka.common.serialization.Deserializer<?> removeDelegate(String selector)

deserialize

public Object deserialize(String topic,
 byte[] data)

Specified by:

deserialize in interface org.apache.kafka.common.serialization.Deserializer<Object>

deserialize

public Object deserialize(String topic,
 org.apache.kafka.common.header.Headers headers,
 byte[] data)

Specified by:

deserialize in interface org.apache.kafka.common.serialization.Deserializer<Object>

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface org.apache.kafka.common.serialization.Deserializer<Object>