Package org.springframework.kafka.support.serializer

Class DelegatingByTopicDeserializer

java.lang.Object

org.springframework.kafka.support.serializer.DelegatingByTopicSerialization<org.apache.kafka.common.serialization.Deserializer<?>>

org.springframework.kafka.support.serializer.DelegatingByTopicDeserializer

All Implemented Interfaces:

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

public class DelegatingByTopicDeserializer
extends DelegatingByTopicSerialization<org.apache.kafka.common.serialization.Deserializer<?>>
implements org.apache.kafka.common.serialization.Deserializer<Object>

A Deserializer that delegates to other deserializers based on the topic name.

Since:

2.8

Author:

Gary Russell, Wang Zhiyang

Field Summary

Fields inherited from class org.springframework.kafka.support.serializer.DelegatingByTopicSerialization

CASE_SENSITIVE, KEY_SERIALIZATION_TOPIC_CONFIG, KEY_SERIALIZATION_TOPIC_DEFAULT, VALUE_SERIALIZATION_TOPIC_CONFIG, VALUE_SERIALIZATION_TOPIC_DEFAULT

Constructor Summary

Constructors

Constructor	Description
DelegatingByTopicDeserializer()	Construct an instance that will be configured in configure(Map, boolean) with consumer properties.
DelegatingByTopicDeserializer(Map<Pattern,org.apache.kafka.common.serialization.Deserializer<?>> delegates, org.apache.kafka.common.serialization.Deserializer<?> defaultDelegate)	Construct an instance with the supplied mapping of topic name patterns to delegate deserializers.

Method Summary

Modifier and Type	Method	Description
void	configure(Map<String,?> configs, boolean isKey)
protected org.apache.kafka.common.serialization.Deserializer<?>	configureDelegate(Map<String,?> configs, boolean isKey, org.apache.kafka.common.serialization.Deserializer<?> delegate)	Configure the delegate.
Object	deserialize(String topic, byte[] data)
Object	deserialize(String topic, org.apache.kafka.common.header.Headers headers, byte[] data)
Object	deserialize(String topic, org.apache.kafka.common.header.Headers headers, ByteBuffer data)
protected boolean	isInstance(Object delegate)	Return true if this object is an instance of T.

Methods inherited from class org.springframework.kafka.support.serializer.DelegatingByTopicSerialization

addDelegate, build, buildDefault, close, findDelegate, instantiateAndConfigure, removeDelegate, setCaseSensitive

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.common.serialization.Deserializer

close

Constructor Details

DelegatingByTopicDeserializer

public DelegatingByTopicDeserializer()

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

DelegatingByTopicDeserializer

public DelegatingByTopicDeserializer(Map<Pattern,org.apache.kafka.common.serialization.Deserializer<?>> delegates,
 org.apache.kafka.common.serialization.Deserializer<?> defaultDelegate)

Construct an instance with the supplied mapping of topic name patterns to delegate deserializers.

Parameters:

delegates - the map of delegates.

defaultDelegate - the default to use when no topic name match.

Method Details

configure

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

Specified by:

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

Overrides:

configure in class DelegatingByTopicSerialization<org.apache.kafka.common.serialization.Deserializer<?>>

configureDelegate

protected org.apache.kafka.common.serialization.Deserializer<?> configureDelegate(Map<String,?> configs,
 boolean isKey,
 org.apache.kafka.common.serialization.Deserializer<?> delegate)

Description copied from class: DelegatingByTopicSerialization

Configure the delegate.

Specified by:

configureDelegate in class DelegatingByTopicSerialization<org.apache.kafka.common.serialization.Deserializer<?>>

Parameters:

configs - the configs.

isKey - true if this is for keys.

delegate - the delegate.

Returns:

the delegate.

isInstance

protected boolean isInstance(Object delegate)

Description copied from class: DelegatingByTopicSerialization

Return true if this object is an instance of T.

Specified by:

isInstance in class DelegatingByTopicSerialization<org.apache.kafka.common.serialization.Deserializer<?>>

Parameters:

delegate - the delegate.

Returns:

true if a T.

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>

deserialize

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

Specified by:

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