StringJsonMessageConverter (Spring for Apache Kafka 2.8.2 API)

java.lang.Object
- org.springframework.kafka.support.converter.MessagingMessageConverter
- - org.springframework.kafka.support.converter.JsonMessageConverter
  - - org.springframework.kafka.support.converter.StringJsonMessageConverter

All Implemented Interfaces:

MessageConverter, RecordMessageConverter
```
public class StringJsonMessageConverter
extends JsonMessageConverter
```
JSON Message converter - String on output, String, Bytes, or byte[] on input. Used in conjunction with Kafka StringSerializer/(StringDeserializer, BytesDeserializer, or ByteArrayDeserializer). Consider using the ByteArrayJsonMessageConverter instead to avoid unnecessary String->byte[] conversion.

Author:

Gary Russell, Artem Bilan, Dariusz Szablinski

Field Summary
- Fields inherited from class org.springframework.kafka.support.converter.MessagingMessageConverter
  logger

Constructor Summary

Constructors
Constructor Description

StringJsonMessageConverter()

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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected java.lang.Object`	`convertPayload(org.springframework.messaging.Message<?> message)`	Subclasses can convert the payload; by default, it's sent unchanged to Kafka.

Methods inherited from class org.springframework.kafka.support.converter.JsonMessageConverter
extractAndConvertValue, getObjectMapper, getTypeMapper, initialRecordHeaders, setTypeMapper

Methods inherited from class org.springframework.kafka.support.converter.MessagingMessageConverter
fromMessage, getMessagingConverter, setGenerateMessageId, setGenerateTimestamp, setHeaderMapper, setMessagingConverter, setRawRecordHeader, toMessage

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.kafka.support.converter.MessageConverter
commonHeaders

- Constructor Detail
  - StringJsonMessageConverter
```
public StringJsonMessageConverter()
```
  - StringJsonMessageConverter
```
public StringJsonMessageConverter(com.fasterxml.jackson.databind.ObjectMapper objectMapper)
```
- Method Detail
  - 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 JsonMessageConverter
    
    Parameters:
    
    message - the message.
    
    Returns:
    
    the payload.