kafka提供了一些参数可以用于设置在消费端,用于提高消费的速度。
https://kafka.apache.org/24/documentation.html#consumerconfigs
支持的属性 见源码 KafkaProperties#Consumer
spring.kafka.listener.type 默认Single
spring.kafka.consumer.max-poll-records
spring.kafka.consumer.fetch-min-size
spring.kafka.consumer.fetch-max-wait
<dependencies>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-webartifactId>
dependency>
<dependency>
<groupId>org.springframework.kafkagroupId>
<artifactId>spring-kafkaartifactId>
dependency>
<dependency>
<groupId>org.springframework.bootgroupId>
<artifactId>spring-boot-starter-testartifactId>
<scope>testscope>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<scope>testscope>
dependency>
dependencies>
spring:
# Kafka 配置项,对应 KafkaProperties 配置类
kafka:
bootstrap-servers: 192.168.126.140:9092 # 指定 Kafka Broker 地址,可以设置多个,以逗号分隔
# Kafka Producer 配置项
producer:
acks: 1 # 0-不应答。1-leader 应答。all-所有 leader 和 follower 应答。
retries: 3 # 发送失败时,重试发送的次数
key-serializer: org.apache.kafka.common.serialization.StringSerializer # 消息的 key 的序列化
value-serializer: org.springframework.kafka.support.serializer.JsonSerializer # 消息的 value 的序列化
batch-size: 16384 # 每次批量发送消息的最大数量 单位 字节 默认 16K
buffer-memory: 33554432 # 每次批量发送消息的最大内存 单位 字节 默认 32M
properties:
linger:
ms: 10000 # 批处理延迟时间上限。[实际不会配这么长,这里用于测速]这里配置为 10 * 1000 ms 过后,不管是否消息数量是否到达 batch-size 或者消息大小到达 buffer-memory 后,都直接发送一次请求。
# Kafka Consumer 配置项
consumer:
auto-offset-reset: earliest # 设置消费者分组最初的消费进度为 earliest
key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
value-deserializer: org.springframework.kafka.support.serializer.JsonDeserializer
properties:
spring:
json:
trusted:
packages: com.artisan.springkafka.domain
fetch-max-wait: 10000 # poll 一次拉取的阻塞的最大时长,单位:毫秒。这里指的是阻塞拉取需要满足至少 fetch-min-size 大小的消息
fetch-min-size: 10 # poll 一次消息拉取的最小数据量,单位:字节
max-poll-records: 100 # poll 一次消息拉取的最大数量
# Kafka Consumer Listener 监听器配置
listener:
missing-topics-fatal: false # 消费监听接口监听的主题不存在时,默认会报错。所以通过设置为 false ,解决报错
type: batch # 监听器类型,默认为SINGLE ,只监听单条消息。这里我们配置 BATCH ,监听多条消息,批量消费
logging:
level:
org:
springframework:
kafka: ERROR # spring-kafka
apache:
kafka: ERROR # kafka
重点关注
package com.artisan.springkafka.producer;
import com.artisan.springkafka.constants.TOPIC;
import com.artisan.springkafka.domain.MessageMock;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.kafka.support.SendResult;
import org.springframework.stereotype.Component;
import org.springframework.util.concurrent.ListenableFuture;
import java.util.Random;
import java.util.concurrent.ExecutionException;
/**
* @author 小工匠
* @version 1.0
* @description: TODO
* @date 2021/2/17 22:25
* @mark: show me the code , change the world
*/
@Component
public class ArtisanProducerMock {
@Autowired
private KafkaTemplate<Object,Object> kafkaTemplate ;
/**
* 同步发送
* @return
* @throws ExecutionException
* @throws InterruptedException
*/
public SendResult sendMsgSync() throws ExecutionException, InterruptedException {
// 模拟发送的消息
Integer id = new Random().nextInt(100);
MessageMock messageMock = new MessageMock(id,"artisanTestMessage-" + id);
// 同步等待
return kafkaTemplate.send(TOPIC.TOPIC, messageMock).get();
}
public ListenableFuture<SendResult<Object, Object>> sendMsgASync() throws ExecutionException, InterruptedException {
// 模拟发送的消息
Integer id = new Random().nextInt(100);
MessageMock messageMock = new MessageMock(id,"messageSendByAsync-" + id);
// 异步发送消息
ListenableFuture<SendResult<Object, Object>> result = kafkaTemplate.send(TOPIC.TOPIC, messageMock);
return result ;
}
}
package com.artisan.springkafka.consumer;
import com.artisan.springkafka.domain.MessageMock;
import com.artisan.springkafka.constants.TOPIC;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Component;
import java.util.List;
/**
* @author 小工匠
* @version 1.0
* @description: TODO
* @date 2021/2/17 22:33
* @mark: show me the code , change the world
*/
@Component
public class ArtisanCosumerMock {
private Logger logger = LoggerFactory.getLogger(getClass());
private static final String CONSUMER_GROUP_PREFIX = "MOCK-A" ;
@KafkaListener(topics = TOPIC.TOPIC ,groupId = CONSUMER_GROUP_PREFIX + TOPIC.TOPIC)
public void onMessage(List<MessageMock> messageMocks){
logger.info("【ArtisanCosumerMock接受到消息][线程:{} 消息大小:{}]", Thread.currentThread().getName(), messageMocks.size());
messageMocks.forEach(messageMock -> System.out.println("ArtisanCosumerMock收到的消息:" + messageMock));
}
}
注意入参参数变为了 List
package com.artisan.springkafka.consumer;
import com.artisan.springkafka.domain.MessageMock;
import com.artisan.springkafka.constants.TOPIC;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Component;
import java.util.List;
/**
* @author 小工匠
* @version 1.0
* @description: TODO
* @date 2021/2/17 22:33
* @mark: show me the code , change the world
*/
@Component
public class ArtisanCosumerMockDiffConsumeGroup {
private Logger logger = LoggerFactory.getLogger(getClass());
private static final String CONSUMER_GROUP_PREFIX = "MOCK-B" ;
@KafkaListener(topics = TOPIC.TOPIC ,groupId = CONSUMER_GROUP_PREFIX + TOPIC.TOPIC)
public void onMessage(List<MessageMock> messageMocks){
logger.info("【ArtisanCosumerMockDiffConsumeGroup接受到消息][线程:{} 消息大小:{}]", Thread.currentThread().getName(), messageMocks.size());
messageMocks.forEach(messageMock -> System.out.println("ArtisanCosumerMockDiffConsumeGroup收到的消息:" + messageMock));
}
}
package com.artisan.springkafka.produceTest;
import com.artisan.springkafka.SpringkafkaApplication;
import com.artisan.springkafka.producer.ArtisanProducerMock;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.kafka.support.SendResult;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.util.concurrent.ListenableFuture;
import org.springframework.util.concurrent.ListenableFutureCallback;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
/**
* @author 小工匠
* * @version 1.0
* @description: TODO
* @date 2021/2/17 22:40
* @mark: show me the code , change the world
*/
@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringkafkaApplication.class)
public class ProduceMockTest {
private Logger logger = LoggerFactory.getLogger(getClass());
@Autowired
private ArtisanProducerMock artisanProducerMock;
@Test
public void testAsynSend() throws ExecutionException, InterruptedException {
logger.info("开始发送");
for (int i = 0; i < 2; i++) {
artisanProducerMock.sendMsgASync().addCallback(new ListenableFutureCallback<SendResult<Object, Object>>() {
@Override
public void onFailure(Throwable throwable) {
logger.info(" 发送异常{}]]", throwable);
}
@Override
public void onSuccess(SendResult<Object, Object> objectObjectSendResult) {
logger.info("回调结果 Result = topic:[{}] , partition:[{}], offset:[{}]",
objectObjectSendResult.getRecordMetadata().topic(),
objectObjectSendResult.getRecordMetadata().partition(),
objectObjectSendResult.getRecordMetadata().offset());
}
});
// 发送2次 每次间隔5秒, 凑够我们配置的 linger: ms: 10000
TimeUnit.SECONDS.sleep(5);
logger.info("发送一条结束...");
}
// 阻塞等待,保证消费
new CountDownLatch(1).await();
}
}
异步发送2条消息,每次发送消息之间, sleep 5 秒,以便达到配置的 linger.ms 最大等待时长10秒。
2021-02-18 12:13:00.201 INFO 8252 --- [ main] c.a.s.produceTest.ProduceMockTest : 开始发送
2021-02-18 12:13:05.426 INFO 8252 --- [ main] c.a.s.produceTest.ProduceMockTest : 发送一条结束...
2021-02-18 12:13:10.429 INFO 8252 --- [ main] c.a.s.produceTest.ProduceMockTest : 发送一条结束...
2021-02-18 12:13:10.442 INFO 8252 --- [ad | producer-1] c.a.s.produceTest.ProduceMockTest : 回调结果 Result = topic:[MOCK_TOPIC] , partition:[0], offset:[34]
2021-02-18 12:13:10.443 INFO 8252 --- [ad | producer-1] c.a.s.produceTest.ProduceMockTest : 回调结果 Result = topic:[MOCK_TOPIC] , partition:[0], offset:[35]
2021-02-18 12:13:10.493 INFO 8252 --- [ntainer#0-0-C-1] c.a.s.consumer.ArtisanCosumerMock : 【ArtisanCosumerMock接受到消息][线程:org.springframework.kafka.KafkaListenerEndpointContainer#0-0-C-1 消息大小:2]
2021-02-18 12:13:10.493 INFO 8252 --- [ntainer#1-0-C-1] a.s.c.ArtisanCosumerMockDiffConsumeGroup : 【ArtisanCosumerMockDiffConsumeGroup接受到消息][线程:org.springframework.kafka.KafkaListenerEndpointContainer#1-0-C-1 消息大小:2]
ArtisanCosumerMockDiffConsumeGroup收到的消息:MessageMock{id=24, name='messageSendByAsync-24'}
ArtisanCosumerMockDiffConsumeGroup收到的消息:MessageMock{id=32, name='messageSendByAsync-32'}
ArtisanCosumerMock收到的消息:MessageMock{id=24, name='messageSendByAsync-24'}
ArtisanCosumerMock收到的消息:MessageMock{id=32, name='messageSendByAsync-32'}
从日志中可以看出,发送的 2条消息被 消费者批量消费了
咦 , 我们把Type改成默认值试试呢?
重新测试
观察日志
2021-02-18 12:17:59.598 INFO 7764 --- [ main] c.a.s.produceTest.ProduceMockTest : 开始发送
2021-02-18 12:18:04.776 INFO 7764 --- [ main] c.a.s.produceTest.ProduceMockTest : 发送一条结束...
2021-02-18 12:18:09.778 INFO 7764 --- [ main] c.a.s.produceTest.ProduceMockTest : 发送一条结束...
2021-02-18 12:18:09.781 INFO 7764 --- [ad | producer-1] c.a.s.produceTest.ProduceMockTest : 回调结果 Result = topic:[MOCK_TOPIC] , partition:[0], offset:[36]
2021-02-18 12:18:09.782 INFO 7764 --- [ad | producer-1] c.a.s.produceTest.ProduceMockTest : 回调结果 Result = topic:[MOCK_TOPIC] , partition:[0], offset:[37]
2021-02-18 12:18:09.837 INFO 7764 --- [ntainer#0-0-C-1] c.a.s.consumer.ArtisanCosumerMock : 【ArtisanCosumerMock接受到消息][线程:org.springframework.kafka.KafkaListenerEndpointContainer#0-0-C-1 消息大小:1]
2021-02-18 12:18:09.837 INFO 7764 --- [ntainer#1-0-C-1] a.s.c.ArtisanCosumerMockDiffConsumeGroup : 【ArtisanCosumerMockDiffConsumeGroup接受到消息][线程:org.springframework.kafka.KafkaListenerEndpointContainer#1-0-C-1 消息大小:1]
ArtisanCosumerMock收到的消息:MessageMock{id=13, name='messageSendByAsync-13'}
ArtisanCosumerMockDiffConsumeGroup收到的消息:MessageMock{id=13, name='messageSendByAsync-13'}
2021-02-18 12:18:09.838 INFO 7764 --- [ntainer#0-0-C-1] c.a.s.consumer.ArtisanCosumerMock : 【ArtisanCosumerMock接受到消息][线程:org.springframework.kafka.KafkaListenerEndpointContainer#0-0-C-1 消息大小:1]
ArtisanCosumerMock收到的消息:MessageMock{id=45, name='messageSendByAsync-45'}
2021-02-18 12:18:09.838 INFO 7764 --- [ntainer#1-0-C-1] a.s.c.ArtisanCosumerMockDiffConsumeGroup : 【ArtisanCosumerMockDiffConsumeGroup接受到消息][线程:org.springframework.kafka.KafkaListenerEndpointContainer#1-0-C-1 消息大小:1]
ArtisanCosumerMockDiffConsumeGroup收到的消息:MessageMock{id=45, name='messageSendByAsync-45'}
https://github.com/yangshangwei/boot2/tree/master/springkafkaBatchSend