org.apache.pulsar.client.kafka.compat

类 KafkaProducerInterceptorWrapper<K,V>

java.lang.Object

org.apache.pulsar.client.kafka.compat.KafkaProducerInterceptorWrapper<K,V>

所有已实现的接口:

AutoCloseable, org.apache.pulsar.client.api.ProducerInterceptor<byte[]>

public class KafkaProducerInterceptorWrapper<K,V>
extends Object
implements org.apache.pulsar.client.api.ProducerInterceptor<byte[]>

A wrapper for Kafka's ProducerInterceptor to make pulsar support Kafka ProducerInterceptor. It holds an instance of ProducerInterceptor and it'll delegate all invocation to that instance.

Extend ProducerInterceptor as all Pulsar Message created by PulsarKafkaProducer is of type byte[].

构造器概要

构造器

构造器和说明
KafkaProducerInterceptorWrapper(org.apache.kafka.clients.producer.ProducerInterceptor<K,V> kafkaProducerInterceptor, org.apache.kafka.common.serialization.Serializer<K> keySerializer, org.apache.kafka.common.serialization.Serializer<V> valueSerializer, String topic) Create a wrapper of type ProducerInterceptor that will delegate all work to underlying Kafka's interceptor.

方法概要

限定符和类型	方法和说明
org.apache.pulsar.client.api.Message<byte[]>	beforeSend(org.apache.pulsar.client.api.Producer<byte[]> producer, org.apache.pulsar.client.api.Message<byte[]> message) It tries to convert a Pulsar Message to a KafkaProducerRecord, pass it to underlying ProducerInterceptor.onSend(ProducerRecord) then convert the output back to Pulsar Message.
void	close() Called when interceptor is closed.
void	onSendAcknowledgement(org.apache.pulsar.client.api.Producer<byte[]> producer, org.apache.pulsar.client.api.Message<byte[]> message, org.apache.pulsar.client.api.MessageId msgId, Throwable exception) Delegate work to ProducerInterceptor.onAcknowledgement(org.apache.kafka.clients.producer.RecordMetadata, java.lang.Exception)

从类继承的方法 java.lang.Object

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

构造器详细资料

KafkaProducerInterceptorWrapper

public KafkaProducerInterceptorWrapper(org.apache.kafka.clients.producer.ProducerInterceptor<K,V> kafkaProducerInterceptor,
                                       org.apache.kafka.common.serialization.Serializer<K> keySerializer,
                                       org.apache.kafka.common.serialization.Serializer<V> valueSerializer,
                                       String topic)

Create a wrapper of type ProducerInterceptor that will delegate all work to underlying Kafka's interceptor.

参数:

kafkaProducerInterceptor - Underlying instance of org.apache.kafka.clients.producer.ProducerInterceptor that this wrapper will delegate work to.

keySerializer - Serializer used to serialize Kafka ProducerRecord.key.

valueSerializer - Serializer used to serialize Kafka ProducerRecord.value.

topic - Topic this ProducerInterceptor will be associated to.

方法详细资料

close

public void close()

Called when interceptor is closed. The wrapper itself doesn't own any resource, just call underlying ProducerInterceptor.close()

指定者:

close 在接口中 AutoCloseable

指定者:

close 在接口中 org.apache.pulsar.client.api.ProducerInterceptor<byte[]>

beforeSend

public org.apache.pulsar.client.api.Message<byte[]> beforeSend(org.apache.pulsar.client.api.Producer<byte[]> producer,
                                                               org.apache.pulsar.client.api.Message<byte[]> message)

It tries to convert a Pulsar Message to a KafkaProducerRecord, pass it to underlying ProducerInterceptor.onSend(ProducerRecord) then convert the output back to Pulsar Message.

When build a Pulsar Message at PulsarKafkaProducer.buildMessage(org.apache.pulsar.client.api.TypedMessageBuilder<byte[]>, org.apache.kafka.clients.producer.ProducerRecord<K, V>) schema, eventtime, partitionID, key and value are set. All this information will be preserved during the conversion.

指定者:

beforeSend 在接口中 org.apache.pulsar.client.api.ProducerInterceptor<byte[]>

参数:

producer - the producer which contains the interceptor, will be ignored as Kafka ProducerInterceptor doesn't use it.

message - message to send

返回:

Processed message.

onSendAcknowledgement

public void onSendAcknowledgement(org.apache.pulsar.client.api.Producer<byte[]> producer,
                                  org.apache.pulsar.client.api.Message<byte[]> message,
                                  org.apache.pulsar.client.api.MessageId msgId,
                                  Throwable exception)

Delegate work to ProducerInterceptor.onAcknowledgement(org.apache.kafka.clients.producer.RecordMetadata, java.lang.Exception)

指定者:

onSendAcknowledgement 在接口中 org.apache.pulsar.client.api.ProducerInterceptor<byte[]>

参数:

producer - the producer which contains the interceptor.

message - the message that application sends

msgId - the message id that assigned by the broker; null if send failed.

exception - the exception on sending messages, null indicates send has succeed.