<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.7.0</version> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.apache.pulsar</groupId> <artifactId>pulsar-client</artifactId> <version>2.10.0</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.24</version> <scope>provided</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>8</source> <target>8</target> </configuration> </plugin> </plugins> </build>
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<String, String> topicMap;
/**
* 订阅
*/
private Map<String, String> subMap;
/**
* 开关 on:Consumer可用 ||||| off:Consumer断路
*/
private String onOff;
}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");
}
}
}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<User> {
@Override
public void received(Consumer<User> consumer, Message<User> 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<String> {
@Override
public void received(Consumer<String> consumer, Message<String> msg) {
try {
System.out.println(msg.getValue());
consumer.acknowledge(msg);
} catch (Exception e) {
consumer.negativeAcknowledge(msg);
}
}
}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 <T> 泛型
* @return Producer生产者
*/
public <T> Producer<T> createProducer(String topic, Schema<T> 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 <T> 泛型
* @return Consumer消费者
*/
public <T> Consumer<T> createConsumer(String topic, String subscription,
MessageListener<T> messageListener, Schema<T> 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 <T> 消息泛型
*/
public <T> void sendAsyncMessage(T message, Producer<T> 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 <T> 泛型
* @throws PulsarClientException
*/
public <T> void sendSyncMessage(T message, Producer<T> 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<String> 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<User> 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<String> getCommentPublishTopicProducer() {
return this.createProducer(pulsarProperties.getTopicMap().get("comment-publish-topic"),Schema.STRING);
}
@Bean(name = "reply-publish-topic-producer")
public Producer<User> getReplyPublishTopicProducer() {
return this.createProducer(pulsarProperties.getTopicMap().get("reply-publish-topic"), AvroSchema.of(User.class));
}
}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"));
}
}
}参考：
https://wenku.baidu.com/view/4d3337ab6b0203d8ce2f0066f5335a8102d266a7.html
https://gitee.com/zhaoyuxuan66/pulsar-springcloud_boot-demo/tree/master/
https://blog.csdn.net/weixin_56227932/article/details/122897075
