ProducerListener (Spring Kafka 2.6.1 API)

Type Parameters:

K - the key type.

V - the value type.

All Known Implementing Classes:

CompositeProducerListener, LoggingProducerListener
```
public interface ProducerListener<K,V>
```
Listener for handling outbound Kafka messages. Exactly one of its methods will be invoked, depending on whether the write has been acknowledged or not. Its main goal is to provide a stateless singleton delegate for Callbacks, which, in all but the most trivial cases, requires creating a separate instance per message.

Author:

Marius Bogoevici, Gary Russell, Endika Gutiérrez

See Also:

Callback

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default void`	`onError(org.apache.kafka.clients.producer.ProducerRecord<K,V> producerRecord, java.lang.Exception exception)`	Invoked after an attempt to send a message has failed.
`default void`	`onSuccess(org.apache.kafka.clients.producer.ProducerRecord<K,V> producerRecord, org.apache.kafka.clients.producer.RecordMetadata recordMetadata)`	Invoked after the successful send of a message (that is, after it has been acknowledged by the broker).

- Method Detail
  - onSuccess
```
default void onSuccess(org.apache.kafka.clients.producer.ProducerRecord<K,V> producerRecord,
                       org.apache.kafka.clients.producer.RecordMetadata recordMetadata)
```
    Invoked after the successful send of a message (that is, after it has been acknowledged by the broker).
    
    Parameters:
    
    producerRecord - the actual sent record
    
    recordMetadata - the result of the successful send operation
  - onError
```
default void onError(org.apache.kafka.clients.producer.ProducerRecord<K,V> producerRecord,
                     java.lang.Exception exception)
```
    Invoked after an attempt to send a message has failed.
    
    Parameters:
    
    producerRecord - the failed record
    
    exception - the exception thrown