在Spring Boot中配置Kafka消息死信隊列，可以通過以下步驟實現：
添加依賴：
首先，確保你的pom.xml文件中包含了Kafka和Spring Kafka的依賴。
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka</artifactId>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
</dependency>
配置Kafka：
在application.yml或application.properties文件中配置Kafka的連接信息。
spring:
kafka:
bootstrap-servers: localhost:9092
consumer:
group-id: my-group
auto-offset-reset: earliest
key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
producer:
key-serializer: org.apache.kafka.common.serialization.StringSerializer
value-serializer: org.apache.kafka.common.serialization.StringSerializer
定義死信隊列：
在Kafka的配置文件中定義死信隊列。例如，在application.yml中添加以下配置：
kafka:
consumer:
properties:
max.poll.records: 500
enable.auto.commit: false
auto.offset.reset: earliest
group.id: my-group
value.deserializer: org.apache.kafka.common.serialization.StringDeserializer
key.deserializer: org.apache.kafka.common.serialization.StringDeserializer
security.protocol: SSL
ssl.truststore.location: classpath:truststore.jks
ssl.truststore.password: password
ssl.key.store.location: classpath:keystore.jks
ssl.key.store.password: password
ssl.key.password: password
ssl.enabled: true
properties.security.protocol: SSL
properties.ssl.truststore.location: classpath:truststore.jks
properties.ssl.truststore.password: password
properties.ssl.key.store.location: classpath:keystore.jks
properties.ssl.key.store.password: password
properties.ssl.key.password: password
properties.ssl.enabled: true
listener:
simple:
consumer:
max-poll-records: 500
enable-auto-commit: false
auto-offset-reset: earliest
group-id: my-group
value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
security-protocol: SSL
ssl-truststore-location: classpath:truststore.jks
ssl-truststore-password: password
ssl-key-store-location: classpath:keystore.jks
ssl-key-store-password: password
ssl-key-password: password
ssl-enabled: true
topics:
- my-topic
group-id: my-group
auto-offset-reset: earliest
key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
security-protocol: SSL
ssl-truststore-location: classpath:truststore.jks
ssl-truststore-password: password
ssl-key-store-location: classpath:keystore.jks
ssl-key-store-password: password
ssl-key-password: password
ssl-enabled: true
定義死信隊列的消費者： 創建一個消費者來處理死信隊列中的消息。
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.annotation.KafkaListener;
import org.springframework.stereotype.Service;
@Service
public class DeadLetterQueueConsumer {
@Autowired
private KafkaConsumer<String, String> kafkaConsumer;
@KafkaListener(topics = "${kafka.consumer.topics.dead-letter-topic}", groupId = "${kafka.consumer.group-id}")
public void listen(ConsumerRecord<String, String> record) {
System.out.printf("Received record: key = %s, value = %s, partition = %d, offset = %d%n",
record.key(), record.value(), record.partition(), record.offset());
// 處理死信隊列中的消息
}
}
定義死信隊列的生產者： 創建一個生產者來發送消息到死信隊列。
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class DeadLetterQueueProducer {
@Autowired
private KafkaProducer<String, String> kafkaProducer;
public void sendToDeadLetterQueue(String topic, String message) {
kafkaProducer.send(new ProducerRecord<>(topic, message));
}
}
配置死信隊列：
在Kafka的配置文件中定義死信隊列。例如，在application.yml中添加以下配置：
kafka:
consumer:
properties:
max-poll-records: 500
enable-auto-commit: false
auto-offset-reset: earliest
group-id: my-group
value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
security-protocol: SSL
ssl-truststore-location: classpath:truststore.jks
ssl-truststore-password: password
ssl-key-store-location: classpath:keystore.jks
ssl-key-store-password: password
ssl-key-password: password
ssl-enabled: true
listener:
simple:
consumer:
max-poll-records: 500
enable-auto-commit: false
auto-offset-reset: earliest
group-id: my-group
value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
security-protocol: SSL
ssl-truststore-location: classpath:truststore.jks
ssl-truststore-password: password
ssl-key-store-location: classpath:keystore.jks
ssl-key-store-password: password
ssl-key-password: password
ssl-enabled: true
topics:
- my-topic
group-id: my-group
auto-offset-reset: earliest
key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
value-deserializer: org.apache.kafka.common.serialization.StringDeserializer
security-protocol: SSL
ssl-truststore-location: classpath:truststore.jks
ssl-truststore-password: password
ssl-key-store-location: classpath:keystore.jks
ssl-key-store-password: password
ssl-key-password: password
ssl-enabled: true
通過以上步驟，你就可以在Spring Boot中配置Kafka消息死信隊列了。
