org.apache.kafka.clients.producer
Class ProducerRecord<K,V>

java.lang.Object
  org.apache.kafka.clients.producer.ProducerRecord<K,V>

public final class ProducerRecord<K,V>
extends java.lang.Object

A key/value pair to be sent to Kafka. This consists of a topic name to which the record is being sent, an optional partition number, and an optional key and value.

If a valid partition number is specified that partition will be used when sending the record. If no partition is specified but a key is present a partition will be chosen using a hash of the key. If neither key nor partition is present a partition will be assigned in a round-robin fashion.

Constructor Summary

ProducerRecord(java.lang.String topic, java.lang.Integer partition, K key, V value)
Creates a record to be sent to a specified topic and partition

ProducerRecord(java.lang.String topic, K key, V value)
Create a record to be sent to Kafka

ProducerRecord(java.lang.String topic, V value)
Create a record with no key

Method Summary

K	key() The key (or null if no key is specified)
java.lang.Integer	partition() The partition to which the record will be sent (or null if no partition was specified)
java.lang.String	topic() The topic this record is being sent to
java.lang.String	toString()
V	value()

Methods inherited from class java.lang.Object

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

Constructor Detail

ProducerRecord

public ProducerRecord(java.lang.String topic,
                      java.lang.Integer partition,
                      K key,
                      V value)

Creates a record to be sent to a specified topic and partition

Parameters:

topic - The topic the record will be appended to

partition - The partition to which the record should be sent

key - The key that will be included in the record

value - The record contents

ProducerRecord

public ProducerRecord(java.lang.String topic,
                      K key,
                      V value)

Create a record to be sent to Kafka

Parameters:

topic - The topic the record will be appended to

key - The key that will be included in the record

value - The record contents

ProducerRecord

public ProducerRecord(java.lang.String topic,
                      V value)

Create a record with no key

Parameters:

topic - The topic this record should be sent to

value - The record contents

Method Detail

topic

public java.lang.String topic()

The topic this record is being sent to

key

public K key()

The key (or null if no key is specified)

value

public V value()

Returns:

The value

partition

public java.lang.Integer partition()

The partition to which the record will be sent (or null if no partition was specified)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object