ApsaraMQ for RocketMQ:Send and receive normal messages

#include "ONSFactory.h"
#include "ONSClientException.h"

using namespace ons;

int main()
{
    // Configure producer properties
    ONSFactoryProperty factoryInfo;
    factoryInfo.setFactoryProperty(ONSFactoryProperty::ProducerId, "<your-group-id>");
    factoryInfo.setFactoryProperty(ONSFactoryProperty::NAMESRV_ADDR, "<your-tcp-endpoint>");
    factoryInfo.setFactoryProperty(ONSFactoryProperty::PublishTopics, "<your-topic>");
    factoryInfo.setFactoryProperty(ONSFactoryProperty::MsgContent, "<your-message-content>");

    // Load credentials from environment variables.
    // Make sure ALIBABA_CLOUD_ACCESS_KEY_ID and ALIBABA_CLOUD_ACCESS_KEY_SECRET are set.
    factoryInfo.setFactoryProperty(ONSFactoryProperty::AccessKey, getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"));
    factoryInfo.setFactoryProperty(ONSFactoryProperty::SecretKey, getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET"));

    // Create and start the producer.
    // Call start() exactly once before sending any messages.
    Producer *pProducer = ONSFactory::getInstance()->createProducer(factoryInfo);
    pProducer->start();

    // Build the message
    Message msg(
            factoryInfo.getPublishTopics(),  // Topic (must be a normal-message topic)
            "TagA",                          // Tag -- consumers use tags to filter messages
            factoryInfo.getMessageContent()  // Body -- cannot be empty
    );

    // Set a message key for traceability.
    // Keys must be globally unique whenever possible (for example, an order ID).
    // Use the key to look up messages in the ApsaraMQ for RocketMQ console.
    msg.setKey("ORDERID_100");

    // Send the message. If no exception is thrown, the message is sent.
    try
    {
        SendResultONS sendResult = pProducer->send(msg);
    }
    catch(ONSClientException & e)
    {
        // Handle the send failure (log, retry, alert, etc.)
    }

    // Shut down the producer before your application exits to prevent issues such as memory leaks.
    pProducer->shutdown();

    return 0;
}

Propriétés des messages

Cycle de vie du producteur