KeyedSerializationSchema (Flink : Connectors : Kafka 3.0.2-1.17 API)

Type Parameters:

T - The type to be serialized.

All Superinterfaces:

Serializable

All Known Implementing Classes:

KeyedSerializationSchemaWrapper, TypeInformationKeyValueSerializationSchema
```
@Deprecated
@PublicEvolving
public interface KeyedSerializationSchema<T>
extends Serializable
```
Deprecated.
Use KafkaSerializationSchema.

The serialization schema describes how to turn a data object into a different serialized representation. Most data sinks (for example Apache Kafka) require the data to be handed to them in a specific format (for example as byte strings).

Method Summary

All Methods Instance Methods Abstract Methods Deprecated Methods
Modifier and Type	Method	Description
`String`	`getTargetTopic(T element)`	Deprecated. Optional method to determine the target topic for the element.
`byte[]`	`serializeKey(T element)`	Deprecated. Serializes the key of the incoming element to a byte array This method might return null if no key is available.
`byte[]`	`serializeValue(T element)`	Deprecated. Serializes the value of the incoming element to a byte array.

- Method Detail
  - serializeKey
```
byte[] serializeKey(T element)
```
    Deprecated.
    
    Serializes the key of the incoming element to a byte array This method might return null if no key is available.
    
    Parameters:
    
    element - The incoming element to be serialized
    
    Returns:
    
    the key of the element as a byte array
  - serializeValue
```
byte[] serializeValue(T element)
```
    Deprecated.
    
    Serializes the value of the incoming element to a byte array.
    
    Parameters:
    
    element - The incoming element to be serialized
    
    Returns:
    
    the value of the element as a byte array
  - getTargetTopic
```
String getTargetTopic(T element)
```
    Deprecated.
    
    Optional method to determine the target topic for the element.
    
    Parameters:
    
    element - Incoming element to determine the target topic from
    
    Returns:
    
    null or the target topic