Package org.springframework.kafka.support.serializer

Class ParseStringDeserializer<T>

java.lang.Object

org.springframework.kafka.support.serializer.ParseStringDeserializer<T>

Type Parameters:

T - class of the entity, representing messages

All Implemented Interfaces:

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

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

Generic Deserializer for deserialization of entity from its String representation received from Kafka (a.k.a parsing).

Since:

2.5

Author:

Alexei Klenin, Gary Russell

Field Summary

Fields

Modifier and Type	Field	Description
static final String	KEY_PARSER	Property for the key parser method.
static final String	VALUE_PARSER	Property for the key parser method.

Constructor Summary

Constructors

Constructor	Description
ParseStringDeserializer()	Construct an instance with no parser function; a static method name must be provided in the consumer config KEY_PARSER or VALUE_PARSER properties.
ParseStringDeserializer(BiFunction<String,org.apache.kafka.common.header.Headers,T> parser)	Construct an instance with the supplied parser function.
ParseStringDeserializer(Function<String,T> parser)	Construct an instance with the supplied parser function.

Method Summary

Modifier and Type	Method	Description
void	configure(Map<String,?> configs, boolean isKey)
T	deserialize(String topic, byte[] data)
T	deserialize(String topic, org.apache.kafka.common.header.Headers headers, byte[] data)
Charset	getCharset()	Get the configured charset.
BiFunction<String,org.apache.kafka.common.header.Headers,T>	getParser()	Get the configured parser function.
void	setCharset(Charset charset)	Set a charset to use when converting byte[] to String.

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, deserialize

Field Details

KEY_PARSER

public static final String KEY_PARSER

Property for the key parser method.

See Also:

• Constant Field Values

VALUE_PARSER

public static final String VALUE_PARSER

Property for the key parser method.

See Also:

• Constant Field Values

Constructor Details

ParseStringDeserializer

public ParseStringDeserializer()

Construct an instance with no parser function; a static method name must be provided in the consumer config KEY_PARSER or VALUE_PARSER properties.

ParseStringDeserializer

public ParseStringDeserializer(Function<String,T> parser)

Construct an instance with the supplied parser function. The function may receive null as the input value, for example for a tombstone record in a compacted topic.

Parameters:

parser - the function.

ParseStringDeserializer

public ParseStringDeserializer(BiFunction<String,org.apache.kafka.common.header.Headers,T> parser)

Construct an instance with the supplied parser function. The function may receive null as the input value, for example for a tombstone record in a compacted topic.

Parameters:

parser - the function.

Method Details

configure

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

Specified by:

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

deserialize

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

Specified by:

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

deserialize

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

Specified by:

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

setCharset

public void setCharset(Charset charset)

Set a charset to use when converting byte[] to String. Default UTF-8.

Parameters:

charset - the charset.

getCharset

public Charset getCharset()

Get the configured charset.

Returns:

the charset.

getParser

public BiFunction<String,org.apache.kafka.common.header.Headers,T> getParser()

Get the configured parser function.

Returns:

the function.