<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));
}
}その後、上記のコードが BUG を引き起こすことが判明しました-> Nacos を更新した後
調査の結果、@RefreshScope アノテーションが原因であることが判明しました。このアノテーションにより Bean が破棄されます。PulsarConsumer とプロデューサーの両方が破棄されます。これは、プロデューサーが破棄されることを意味するだけです。次の呼び出しで再起動を完了しますが、呼び出しがないためコンシューマーを再起動できません。どうすれば解決しますか?
コンテナを更新するために一連のイベントを発行する必要があります
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"));
}
}
}以上がPulsar と SpringBoot を統合する方法の詳細内容です。詳細については、PHP 中国語 Web サイトの他の関連記事を参照してください。
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