SpringBoot整合Pulsar的實現範例

2022-07-01 22:01:00

一、新增pom.xml依賴

<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>

二、Pulsar 引數類

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 引數類
 */

@Component
@ConfigurationProperties(prefix = "tdmq.pulsar")
@Data
public class PulsarProperties {

    /**
     * 接入地址
     */
    private String serviceurl;

    /**
     * 名稱空間tdc
     */
    private String tdcNamespace;

    /**
     * 角色tdc的token
     */
    private String tdcToken;

    /**
     * 叢集name
     */
    private String cluster;

    /**
     * topicMap
     */
    private Map<String, String> topicMap;

    /**
     * 訂閱
     */
    private Map<String, String> subMap;

    /**
     * 開關 on:Consumer可用 ||||| off:Consumer斷路
     */
    private String onOff;
}

三、Pulsar 設定類

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 設定類
 */

@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失敗");
        }
    }

}

四、不同消費資料型別的監聽器

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<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);
        }
    }
}

五、Pulsar的核心服務類

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的核心服務類
 */

@Component
public class PulsarCommon {

    @Autowired
    private PulsarProperties pulsarProperties;

    @Autowired
    private PulsarClient client;

    @Autowired
    private UserMessageListener userMessageListener;

    @Autowired
    private StringMessageListener stringMessageListener;


    /**
     * 建立一個生產者 
     * @param topic     topic name
     * @param schema    schema方式
     * @param <T>       泛型
     * @return          Producer生產者
     */
    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失敗");
        }
    }


    /**
     * 
     * @param topic             topic name
     * @param subscription      sub name
     * @param messageListener   MessageListener的自定義實現類
     * @param schema            schema消費方式
     * @param <T>               泛型
     * @return                  Consumer消費者
     */
    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失敗");
        }
    }

    
    /**
     * 非同步傳送一條訊息
     * @param message       訊息體
     * @param producer      生產者範例
     * @param <T>           訊息泛型
     */
    public <T> void sendAsyncMessage(T message, Producer<T> producer) {
        producer.sendAsync(message).thenAccept(msgId -> {
        });
    }
    
    
    /**
     * 同步傳送一條訊息
     * @param message       訊息體
     * @param producer      生產者範例
     * @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));
    }
}

六、Pulsar整合Spring Cloud

後來發現如上程式碼會導致BUG-> 在更新Nacos設定之後 Consumer會掛掉
經排查發現結果是由於@RefreshScope註解導致，此註解將摧毀Bean，PulsarConsumer和Producer都將被摧毀，只是說Producer將在下⼀次調⽤中完成重啟，Consumer則不能重啟，因為沒有調⽤，那麼怎麼解決呢?

就是釋出系列事件以重新整理容器

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設定中心設定修改 重啟Pulsar====================================");
            log.info("重啟PulsarClient,{}", applicationContext.getBean("getPulsarClient"));
            log.info("重啟PulsarConsumer,{}", applicationContext.getBean("comment-publish-topic-consumer"));
            log.info("重啟PulsarConsumer,{}", applicationContext.getBean("reply-publish-topic-consumer"));
        }
    }

}

參考：

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

http://www.zzvips.com/article/219361.html

https://mp.weixin.qq.com/s/4w0eucDNcrYrsiDXHzLwuQ

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