org.apache.flink.streaming.connectors.kafka.internals

Class KeyedSerializationSchemaWrapper<T>

java.lang.Object

org.apache.flink.streaming.connectors.kafka.internals.KeyedSerializationSchemaWrapper<T>

Type Parameters:

T - The type to serialize

All Implemented Interfaces:

Serializable, KeyedSerializationSchema<T>

@Internal
public class KeyedSerializationSchemaWrapper<T>
extends Object
implements KeyedSerializationSchema<T>

A simple wrapper for using the SerializationSchema with the KeyedSerializationSchema interface.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
KeyedSerializationSchemaWrapper(org.apache.flink.api.common.serialization.SerializationSchema<T> serializationSchema)

Method Summary

Modifier and Type	Method and Description
org.apache.flink.api.common.serialization.SerializationSchema<T>	getSerializationSchema()
String	getTargetTopic(T element) Optional method to determine the target topic for the element.
byte[]	serializeKey(T element) 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) Serializes the value of the incoming element to a byte array.

Methods inherited from class java.lang.Object

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

Constructor Detail

KeyedSerializationSchemaWrapper

public KeyedSerializationSchemaWrapper(org.apache.flink.api.common.serialization.SerializationSchema<T> serializationSchema)

Method Detail

getSerializationSchema

public org.apache.flink.api.common.serialization.SerializationSchema<T> getSerializationSchema()

serializeKey

public byte[] serializeKey(T element)

Description copied from interface: KeyedSerializationSchema

Serializes the key of the incoming element to a byte array This method might return null if no key is available.

Specified by:

serializeKey in interface KeyedSerializationSchema<T>

Parameters:

element - The incoming element to be serialized

Returns:

the key of the element as a byte array

serializeValue

public byte[] serializeValue(T element)

Description copied from interface: KeyedSerializationSchema

Serializes the value of the incoming element to a byte array.

Specified by:

serializeValue in interface KeyedSerializationSchema<T>

Parameters:

element - The incoming element to be serialized

Returns:

the value of the element as a byte array

getTargetTopic

public String getTargetTopic(T element)

Description copied from interface: KeyedSerializationSchema

Optional method to determine the target topic for the element.

Specified by:

getTargetTopic in interface KeyedSerializationSchema<T>

Parameters:

element - Incoming element to determine the target topic from

Returns:

null or the target topic