消息队列 RocketMQ版
消息队列 RocketMQ版
消息队列 RocketMQ版
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消息队列 RocketMQ版SDK 参考RocketMQ 5.xJava 5.x SDK延迟消息
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问问助手本文提供使用 Java SDK 收发延迟消息的示例代码供您参考。
发送延迟消息
发送延迟消息需要在控制台创建延迟消息类型的 Topic，RocketMQ 5.x 版本支持任意精度的延迟消息，发送延迟消息的示例代码如下。
package org.apache.rocketmq.client.java.example;
import org.apache.rocketmq.client.apis.ClientConfiguration;
import org.apache.rocketmq.client.apis.ClientException;
import org.apache.rocketmq.client.apis.ClientServiceProvider;
import org.apache.rocketmq.client.apis.SessionCredentialsProvider;
import org.apache.rocketmq.client.apis.StaticSessionCredentialsProvider;
import org.apache.rocketmq.client.apis.message.Message;
import org.apache.rocketmq.client.apis.producer.Producer;
import org.apache.rocketmq.client.apis.producer.SendReceipt;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.time.Duration;
public class ProducerDelayMessage {
private static final Logger log = LoggerFactory.getLogger(ProducerDelayMessage.class);
private ProducerDelayMessage() {
}
public static void main(String[] args) throws ClientException, IOException {
final ClientServiceProvider provider = ClientServiceProvider.loadService();
// 设置为您从火山引擎消息队列 RocketMQ版控制台获取的接入点信息，类似“{INSTANCE_ID}.rocketmq.ivolces.com:8080”。
String endpoints = "rocketmq-xxx.rocketmq.ivolces.com:8080";
// 根据实例支持的认证方式，填写对应的身份认证信息：
// 密钥管理：accessKey 为 AccessKey ID，secretKey 为 AccessKey Secret。
// 权限管理：accessKey 为 ACL 用户名，secretKey 为 ACL 密码。
String accessKey = "xxxx";
String secretKey = "xxxx";
SessionCredentialsProvider sessionCredentialsProvider =
new StaticSessionCredentialsProvider(accessKey, secretKey);
ClientConfiguration clientConfiguration = ClientConfiguration.newBuilder()
.setEndpoints(endpoints)
// 暂不支持 SSL 模式。
.enableSsl(false)
.setCredentialProvider(sessionCredentialsProvider)
.build();
String topic = "t-delay";
final Producer producer = provider.newProducerBuilder()
.setClientConfiguration(clientConfiguration)
.setTopics(topic)
.build();
// 定义消息体。
byte[] body = "This is a delay message for Apache RocketMQ".getBytes(StandardCharsets.UTF_8);
String tag = "yourMessageTagA";
Duration messageDelayTime = Duration.ofSeconds(10);
final Message message = provider.newMessageBuilder()
// Set topic for the current message.
.setTopic(topic)
// Message secondary classifier of message besides topic.
.setTag(tag)
// Key(s) of the message, another way to mark message besides message id.
.setKeys("yourMessageKey-3ee439f945d7")
// Set expected delivery timestamp of message.
.setDeliveryTimestamp(System.currentTimeMillis() + messageDelayTime.toMillis())
.setBody(body)
.build();
try {
final SendReceipt sendReceipt = producer.send(message);
log.info("Send message successfully, messageId={}", sendReceipt.getMessageId());
} catch (Throwable t) {
log.error("Failed to send message", t);
}
// Close the producer when you don't need it anymore.
// You could close it manually or add this into the JVM shutdown hook.
producer.close();
}
}
订阅延迟消息
延迟消息的订阅方式与普通消息一致，示例代码如下所示。
public class RocketMQDelayConsumer {
private static final Logger log = LoggerFactory.getLogger(RocketMQDelayConsumer.class);
private RocketMQDelayConsumer() {
}
public static void main(String[] args) throws ClientException, InterruptedException, IOException {
final ClientServiceProvider provider = ClientServiceProvider.loadService();
// 设置为您从火山引擎消息队列 RocketMQ版控制台获取的接入点信息，类似“{INSTANCE_ID}.rocketmq.ivolces.com:8080”。
String endpoints = "rocketmq-xxx.rocketmq.ivolces.com:8080";
// 根据实例支持的认证方式，填写对应的身份认证信息：
// 密钥管理：accessKey 为 AccessKey ID，secretKey 为 AccessKey Secret。
// 权限管理：accessKey 为 ACL 用户名，secretKey 为 ACL 密码。
String accessKey = "xxxx";
String secretKey = "xxxx";
SessionCredentialsProvider sessionCredentialsProvider =
new StaticSessionCredentialsProvider(accessKey, secretKey);
ClientConfiguration clientConfiguration = ClientConfiguration.newBuilder()
.setEndpoints(endpoints)
// 暂不支持 SSL 模式。
.enableSsl(false)
.setCredentialProvider(sessionCredentialsProvider)
.build();
String tag = "yourMessageTagA";
FilterExpression filterExpression = new FilterExpression(tag, FilterExpressionType.TAG);
String consumerGroup = "yourConsumerGroup";
String topic = "yourTopic";
// In most case, you don't need to create too many consumers, singleton pattern is recommended.
PushConsumer pushConsumer = provider.newPushConsumerBuilder()
.setClientConfiguration(clientConfiguration)
// Set the consumer group name.
.setConsumerGroup(consumerGroup)
// Set the subscription for the consumer.
.setSubscriptionExpressions(Collections.singletonMap(topic, filterExpression))
.setMessageListener(messageView -> {
// Handle the received message and return consume result.
log.info("Consume message={}", messageView);
return ConsumeResult.SUCCESS;
})
.build();
// Block the main thread, no need for production environment.
Thread.sleep(Long.MAX_VALUE);
// Close the push consumer when you don't need it anymore.
// You could close it manually or add this into the JVM shutdown hook.
pushConsumer.close();
}
}
最近更新时间：2026.08.26 15:19:56
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