io.cloudevents.kafka

Class KafkaMessageFactory

java.lang.Object

io.cloudevents.kafka.KafkaMessageFactory

@ParametersAreNonnullByDefault
public final class KafkaMessageFactory
extends Object

This class provides a collection of methods to create MessageReader and MessageWriter for Kafka Producer and Consumer.

These can be used as an alternative to CloudEventDeserializer and CloudEventSerializer to manually serialize/deserialize CloudEvent messages.

Method Summary

Modifier and Type	Method and Description
static <K> MessageReader	createReader(org.apache.kafka.clients.consumer.ConsumerRecord<K,byte[]> record) Create a MessageReader to read ConsumerRecord.
static MessageReader	createReader(org.apache.kafka.common.header.Headers headers, byte[] payload)
static MessageWriter<io.cloudevents.rw.CloudEventWriter<org.apache.kafka.clients.producer.ProducerRecord<Void,byte[]>>,org.apache.kafka.clients.producer.ProducerRecord<Void,byte[]>>	createWriter(String topic)
static <K> MessageWriter<io.cloudevents.rw.CloudEventWriter<org.apache.kafka.clients.producer.ProducerRecord<K,byte[]>>,org.apache.kafka.clients.producer.ProducerRecord<K,byte[]>>	createWriter(String topic, Integer partition, K key)
static <K> MessageWriter<io.cloudevents.rw.CloudEventWriter<org.apache.kafka.clients.producer.ProducerRecord<K,byte[]>>,org.apache.kafka.clients.producer.ProducerRecord<K,byte[]>>	createWriter(String topic, Integer partition, Long timestamp, K key) Create a MessageWriter to write a ProducerRecord.
static <K> MessageWriter<io.cloudevents.rw.CloudEventWriter<org.apache.kafka.clients.producer.ProducerRecord<K,byte[]>>,org.apache.kafka.clients.producer.ProducerRecord<K,byte[]>>	createWriter(String topic, K key)

Methods inherited from class java.lang.Object

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

Method Detail

createReader

public static <K> MessageReader createReader(org.apache.kafka.clients.consumer.ConsumerRecord<K,byte[]> record)
                                      throws io.cloudevents.rw.CloudEventRWException

Create a MessageReader to read ConsumerRecord.

Type Parameters:

K - the type of the record key

Parameters:

record - the record to convert to MessageReader

Returns:

the new MessageReader

Throws:

io.cloudevents.rw.CloudEventRWException - if something goes wrong while resolving the SpecVersion or if the message has unknown encoding

createReader

public static MessageReader createReader(org.apache.kafka.common.header.Headers headers,
                                         byte[] payload)
                                  throws io.cloudevents.rw.CloudEventRWException

Throws:

io.cloudevents.rw.CloudEventRWException

See Also:

createReader(ConsumerRecord)

createWriter

public static <K> MessageWriter<io.cloudevents.rw.CloudEventWriter<org.apache.kafka.clients.producer.ProducerRecord<K,byte[]>>,org.apache.kafka.clients.producer.ProducerRecord<K,byte[]>> createWriter(String topic,
                                                                                                                                                                                                        Integer partition,
                                                                                                                                                                                                        Long timestamp,
                                                                                                                                                                                                        K key)

Create a MessageWriter to write a ProducerRecord.

Type Parameters:

K - the key type

Parameters:

topic - the topic where to write the record

partition - the partition where to write the record

timestamp - the timestamp of the record

key - the key of the record

Returns:

the new MessageWriter

createWriter

public static <K> MessageWriter<io.cloudevents.rw.CloudEventWriter<org.apache.kafka.clients.producer.ProducerRecord<K,byte[]>>,org.apache.kafka.clients.producer.ProducerRecord<K,byte[]>> createWriter(String topic,
                                                                                                                                                                                                        Integer partition,
                                                                                                                                                                                                        K key)

See Also:

createWriter(String, Integer, Long, Object)

createWriter

public static <K> MessageWriter<io.cloudevents.rw.CloudEventWriter<org.apache.kafka.clients.producer.ProducerRecord<K,byte[]>>,org.apache.kafka.clients.producer.ProducerRecord<K,byte[]>> createWriter(String topic,
                                                                                                                                                                                                        K key)

See Also:

createWriter(String, Integer, Long, Object)

createWriter

public static MessageWriter<io.cloudevents.rw.CloudEventWriter<org.apache.kafka.clients.producer.ProducerRecord<Void,byte[]>>,org.apache.kafka.clients.producer.ProducerRecord<Void,byte[]>> createWriter(String topic)

See Also:

createWriter(String, Integer, Long, Object)