一、添加pom.xml依赖
org.springframework.boot spring-boot-starter-parent 2.7.0 org.springframework.boot spring-boot-starter-web org.apache.pulsar pulsar-client 2.10.0 org.projectlombok lombok 1.18.24 provided org.apache.maven.plugins maven-compiler-plugin 8 8
二、Pulsar 参数类
import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
import java.util.Map;
/**
* @Author: huangyibo
* @Date: 2022/5/28 2:32
* @Description: Pulsar 参数类
*/
@Component
@ConfigurationProperties(prefix = "tdmq.pulsar")
@Data
public class PulsarProperties {
/**
* 接入地址
*/
private String serviceurl;
/**
* 命名空间tdc
*/
private String tdcNamespace;
/**
* 角色tdc的token
*/
private String tdcToken;
/**
* 集群name
*/
private String cluster;
/**
* topicMap
*/
private Map topicMap;
/**
* 订阅
*/
private Map subMap;
/**
* 开关 on:Consumer可用 ||||| off:Consumer断路
*/
private String onOff;
} 三、Pulsar 配置类
import org.apache.pulsar.client.api.AuthenticationFactory;
import org.apache.pulsar.client.api.PulsarClient;
import org.apache.pulsar.client.api.PulsarClientException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
* @Author: huangyibo
* @Date: 2022/5/28 2:33
* @Description: Pulsar 配置类
*/
@Configuration
@EnableConfigurationProperties(PulsarProperties.class)
public class PulsarConfig {
@Autowired
PulsarProperties pulsarProperties;
@Bean
public PulsarClient getPulsarClient() {
try {
return PulsarClient.builder()
.authentication(AuthenticationFactory.token(pulsarProperties.getTdcToken()))
.serviceUrl(pulsarProperties.getServiceurl())
.build();
} catch (PulsarClientException e) {
System.out.println(e);
throw new RuntimeException("初始化Pulsar Client失败");
}
}
}四、不同消费数据类型的监听器
import com.yibo.pulsar.pojo.User; import org.apache.pulsar.client.api.Consumer; import org.apache.pulsar.client.api.Message; import org.apache.pulsar.client.api.MessageListener; import org.springframework.stereotype.Component; /** * @Author: huangyibo * @Date: 2022/5/28 2:37 * @Description: */ @Component public class UserMessageListener implements MessageListener{ @Override public void received(Consumer consumer, Message msg) { try { User user = msg.getValue(); System.out.println(user); consumer.acknowledge(msg); } catch (Exception e) { consumer.negativeAcknowledge(msg); } } } import org.apache.pulsar.client.api.Consumer; import org.apache.pulsar.client.api.Message; import org.apache.pulsar.client.api.MessageListener; import org.springframework.stereotype.Component; /** * @Author: huangyibo * @Date: 2022/5/28 2:37 * @Description: */ @Component public class StringMessageListener implements MessageListener { @Override public void received(Consumer consumer, Message msg) { try { System.out.println(msg.getValue()); consumer.acknowledge(msg); } catch (Exception e) { consumer.negativeAcknowledge(msg); } } }
五、Pulsar的核心服务类
import com.yibo.pulsar.common.listener.StringMessageListener;
import com.yibo.pulsar.common.listener.UserMessageListener;
import com.yibo.pulsar.pojo.User;
import org.apache.pulsar.client.api.*;
import org.apache.pulsar.client.impl.schema.AvroSchema;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;
import java.util.concurrent.TimeUnit;
/**
* @Author: huangyibo
* @Date: 2022/5/28 2:35
* @Description: Pulsar的核心服务类
*/
@Component
public class PulsarCommon {
@Autowired
private PulsarProperties pulsarProperties;
@Autowired
private PulsarClient client;
@Autowired
private UserMessageListener userMessageListener;
@Autowired
private StringMessageListener stringMessageListener;
/**
* 创建一个生产者
* @param topic topic name
* @param schema schema方式
* @param 泛型
* @return Producer生产者
*/
public Producer createProducer(String topic, Schema schema) {
try {
return client.newProducer(schema)
.topic(pulsarProperties.getCluster() + "/" + pulsarProperties.getTdcNamespace() + "/" + topic)
.batchingMaxPublishDelay(10, TimeUnit.MILLISECONDS)
.sendTimeout(10, TimeUnit.SECONDS)
.blockIfQueueFull(true)
.create();
} catch (PulsarClientException e) {
throw new RuntimeException("初始化Pulsar Producer失败");
}
}
/**
*
* @param topic topic name
* @param subscription sub name
* @param messageListener MessageListener的自定义实现类
* @param schema schema消费方式
* @param 泛型
* @return Consumer消费者
*/
public Consumer createConsumer(String topic, String subscription,
MessageListener messageListener, Schema schema) {
try {
return client.newConsumer(schema)
.topic(pulsarProperties.getCluster() + "/" + pulsarProperties.getTdcNamespace() + "/" + topic)
.subscriptionName(subscription)
.ackTimeout(10, TimeUnit.SECONDS)
.subscriptionType(SubscriptionType.Shared)
.messageListener(messageListener)
.subscribe();
} catch (PulsarClientException e) {
throw new RuntimeException("初始化Pulsar Consumer失败");
}
}
/**
* 异步发送一条消息
* @param message 消息体
* @param producer 生产者实例
* @param 消息泛型
*/
public void sendAsyncMessage(T message, Producer producer) {
producer.sendAsync(message).thenAccept(msgId -> {
});
}
/**
* 同步发送一条消息
* @param message 消息体
* @param producer 生产者实例
* @param 泛型
* @throws PulsarClientException
*/
public void sendSyncMessage(T message, Producer producer) throws PulsarClientException {
MessageId send = producer.send(message);
System.out.println();
System.out.println();
System.out.println();
System.out.println();
System.out.println(send);
}
//-----------consumer-----------
@Bean(name = "comment-publish-topic-consumer")
public Consumer getCommentPublishTopicConsumer() {
return this.createConsumer(pulsarProperties.getTopicMap().get("comment-publish-topic"),
pulsarProperties.getSubMap().get("comment-publish-topic-test"),
stringMessageListener, Schema.STRING);
}
@Bean(name = "reply-publish-topic-consumer")
public Consumer getReplyPublishTopicConsumer() {
return this.createConsumer(pulsarProperties.getTopicMap().get("reply-publish-topic"),
pulsarProperties.getSubMap().get("reply-publish-topic-test"),
userMessageListener, AvroSchema.of(User.class));
}
//-----------producer-----------
@Bean(name = "comment-publish-topic-producer")
public Producer getCommentPublishTopicProducer() {
return this.createProducer(pulsarProperties.getTopicMap().get("comment-publish-topic"),Schema.STRING);
}
@Bean(name = "reply-publish-topic-producer")
public Producer getReplyPublishTopicProducer() {
return this.createProducer(pulsarProperties.getTopicMap().get("reply-publish-topic"), AvroSchema.of(User.class));
}
} 六、Pulsar整合Spring Cloud
后来发现如上代码会导致bug-> 在更新nacos配置之后 consumer会挂掉
经排查发现结果是由于@refreshscope注解导致，此注解将摧毁bean，pulsarconsumer和producer都将被摧毁，只是说producer将在下⼀次调⽤中完成重启，consumer则不能重启，因为没有调⽤，那么怎么解决呢?
就是发布系列事件以刷新容器
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.stereotype.Component;
/**
* @Author: huangyibo
* @Date: 2022/5/28 2:34
* @Description:
*/
@Component
@Slf4j
public class RefreshPulsarListener implements ApplicationListener {
@Autowired
ApplicationContext applicationContext;
@Override
public void onApplicationEvent(ApplicationEvent event) {
if (event.getSource().equals("__refreshAll__")) {
log.info("Nacos配置中心配置修改 重启Pulsar====================================");
log.info("重启PulsarClient,{}", applicationContext.getBean("getPulsarClient"));
log.info("重启PulsarConsumer,{}", applicationContext.getBean("comment-publish-topic-consumer"));
log.info("重启PulsarConsumer,{}", applicationContext.getBean("reply-publish-topic-consumer"));
}
}
} 
