import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
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.apache.rocketmq.client.java.example.AsyncProducerExample;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class NormalMessageSyncProducer {
    private static final Logger log = LoggerFactory.getLogger(NormalMessageSyncProducer.class);

    private NormalMessageSyncProducer() {
    }

    public static void main(String[] args) throws ClientException, IOException {
        final ClientServiceProvider provider = ClientServiceProvider.loadService();

        // Add the configured AccessKey and SecretKey.
        String accessKey = "yourAccessKey"; //ak
        String secretKey = "yourSecretKey"; //sk
        SessionCredentialsProvider sessionCredentialsProvider =
            new StaticSessionCredentialsProvider(accessKey, secretKey);

        // Enter the access address provided by Tencent Cloud.
        String endpoints = "rmq-xxx.rocketmq.xxxtencenttdmq.com:8081";
        ClientConfiguration clientConfiguration = ClientConfiguration.newBuilder()
            .setEndpoints(endpoints)
            .enableSsl(false)
            .setCredentialProvider(sessionCredentialsProvider)
            .build();
        String topic = "yourNormalTopic";
        // Usually, it is not necessary to create excessive producers within a single client.
        final Producer producer = provider.newProducerBuilder()
            .setClientConfiguration(clientConfiguration)
            // Set the topic name. This setting is not required but highly recommended, as it allows the producer to pre-fetch message routes before formally sending messages.
            .setTopics(topic)
            // If the producer is not initialized, it may throw an M {@link ClientException} error.
            .build();
        // Define the message body here.
        byte[] body = "This is a normal message for Apache RocketMQ".getBytes(StandardCharsets.UTF_8);
        String tag = "yourMessageTagA";
        final Message message = provider.newMessageBuilder()
            // Set topic for the current message.
            .setTopic(topic)
            // A secondary classification of messages under a topic, used to distinguish different types of messages within the same topic.
            .setTag(tag)
            // The message key, which serves as an alternative method to distinguish between different messages, in addition to the message ID.
            .setKeys("yourMessageKey-1c151062f96e")
            .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);
        }
        // After sending is complete, you can close the producer client if there are no other needs.
        producer.close();
    }
}

  INFO: Send message successfully, messageId={a specific message ID}

import java.io.IOException;
import java.util.Collections;
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.consumer.ConsumeResult;
import org.apache.rocketmq.client.apis.consumer.FilterExpression;
import org.apache.rocketmq.client.apis.consumer.FilterExpressionType;
import org.apache.rocketmq.client.apis.consumer.PushConsumer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class NormalPushConsumer {
    private static final Logger log = LoggerFactory.getLogger(NormalPushConsumer.class);

    private NormalPushConsumer() {
    }

    public static void main(String[] args) throws ClientException, IOException, InterruptedException {
        final ClientServiceProvider provider = ClientServiceProvider.loadService();

        // Add the configured AccessKey and SecretKey.
        String accessKey = "yourAccessKey"; //ak
        String secretKey = "yourSecretKey"; //sk
        SessionCredentialsProvider sessionCredentialsProvider =
            new StaticSessionCredentialsProvider(accessKey, secretKey);

        // Enter the access address provided by Tencent Cloud.
        String endpoints = "rmq-xxx.rocketmq.xxxtencenttdmq.com:8081";
        ClientConfiguration clientConfiguration = ClientConfiguration.newBuilder()
            .setEndpoints(endpoints)
            .enableSsl(false)
            .setCredentialProvider(sessionCredentialsProvider)
            .build();
        String tag = "*";
        FilterExpression filterExpression = new FilterExpression(tag, FilterExpressionType.TAG);
        String consumerGroup = "yourConsumerGroup";
        String topic = "yourTopic";
        // Usually, it is not necessary to create excessive consumers within a single client.
        PushConsumer pushConsumer = provider.newPushConsumerBuilder()
            .setClientConfiguration(clientConfiguration)
            // Set the consumer group name.
            .setConsumerGroup(consumerGroup)
            // Set the consumer subscription name.
            .setSubscriptionExpressions(Collections.singletonMap(topic, filterExpression))
            .setMessageListener(messageView -> {
                // Process messages and return the message consumption result.
                log.info("Consume message={}", messageView);
                return ConsumeResult.SUCCESS;
            })
            .build();
        // Do not block the main thread in the production environment.
        Thread.sleep(Long.MAX_VALUE);
        // After consumption is complete, you can close the consumer client if there are no other needs.
        pushConsumer.close();
    }
}

  INFO: Consume message=MessageView{messageId='...', topic='yourTopic', body=...}