org.springframework.kafka.support.converter

Class StringJsonMessageConverter

java.lang.Object

org.springframework.kafka.support.converter.MessagingMessageConverter

org.springframework.kafka.support.converter.StringJsonMessageConverter

All Implemented Interfaces:

MessageConverter, RecordMessageConverter

public class StringJsonMessageConverter
extends MessagingMessageConverter

JSON Message converter - String on output, String or byte[] on input.

Author:

Gary Russell, Artem Bilan, Dariusz Szablinski

Field Summary

Fields inherited from class org.springframework.kafka.support.converter.MessagingMessageConverter

logger

Constructor Summary

Constructors

Constructor and Description
StringJsonMessageConverter()
StringJsonMessageConverter(com.fasterxml.jackson.databind.ObjectMapper objectMapper)

Method Summary

Modifier and Type	Method and Description
protected java.lang.Object	convertPayload(org.springframework.messaging.Message<?> message) Subclasses can convert the payload; by default, it's sent unchanged to Kafka.
protected java.lang.Object	extractAndConvertValue(org.apache.kafka.clients.consumer.ConsumerRecord<?,?> record, java.lang.reflect.Type type) Subclasses can convert the value; by default, it's returned as provided by Kafka.
Jackson2JavaTypeMapper	getTypeMapper()
protected org.apache.kafka.common.header.Headers	initialRecordHeaders(org.springframework.messaging.Message<?> message) Subclasses can populate additional headers before they are mapped.
void	setTypeMapper(Jackson2JavaTypeMapper typeMapper) Set a customized type mapper.

Methods inherited from class org.springframework.kafka.support.converter.MessagingMessageConverter

fromMessage, setGenerateMessageId, setGenerateTimestamp, setHeaderMapper, toMessage

Methods inherited from class java.lang.Object

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

Constructor Detail

StringJsonMessageConverter

public StringJsonMessageConverter()

StringJsonMessageConverter

public StringJsonMessageConverter(com.fasterxml.jackson.databind.ObjectMapper objectMapper)

Method Detail

getTypeMapper

public Jackson2JavaTypeMapper getTypeMapper()

setTypeMapper

public void setTypeMapper(Jackson2JavaTypeMapper typeMapper)

Set a customized type mapper.

Parameters:

typeMapper - the type mapper.

Since:

2.1

initialRecordHeaders

protected org.apache.kafka.common.header.Headers initialRecordHeaders(org.springframework.messaging.Message<?> message)

Description copied from class: MessagingMessageConverter

Subclasses can populate additional headers before they are mapped.

Overrides:

initialRecordHeaders in class MessagingMessageConverter

Parameters:

message - the message.

Returns:

the headers

convertPayload

protected java.lang.Object convertPayload(org.springframework.messaging.Message<?> message)

Description copied from class: MessagingMessageConverter

Subclasses can convert the payload; by default, it's sent unchanged to Kafka.

Overrides:

convertPayload in class MessagingMessageConverter

Parameters:

message - the message.

Returns:

the payload.

extractAndConvertValue

protected java.lang.Object extractAndConvertValue(org.apache.kafka.clients.consumer.ConsumerRecord<?,?> record,
                                                  java.lang.reflect.Type type)

Description copied from class: MessagingMessageConverter

Subclasses can convert the value; by default, it's returned as provided by Kafka.

Overrides:

extractAndConvertValue in class MessagingMessageConverter

Parameters:

record - the record.

type - the required type.

Returns:

the value.