RocketMQ发送Demo

// 创建连接
public void connect() {
    producer = new DefaultMQProducer("producerGroup-demo");
    producer.setVipChannelEnabled(false);
    producer.setNamesrvAddr("127.0.0.1");
    try {
        this.producer.start();
    } catch (MQClientException e) {
        logger.error("RocketProducerDemo:connect()->" + e.getMessage(), e);
    }
}

public boolean sendMsg(String msg) {
    Message message = new Message("topic-demo", "defaultTags", msg.getBytes());
    try {
    	// 通过订单Id取模，使同一个订单发往同一个队列，保证顺序发送
        MessageQueueSelector selector = (list, message1, o) -> {
            long orderId = ((Order) o).getOrderId();
            return list.get((int) (orderId % list.size()));
        };
        SendResult result = producer.send(message, selector, null, 3000);
        return result.getSendStatus() == SendStatus.SEND_OK;
    } catch (MQClientException e) {
        logger.error("RocketProducerDemo:sendMsg()->" + e.getMessage(), e);
    } catch (RemotingException e) {
        logger.error("RocketProducerDemo:sendMsg()->" + e.getMessage(), e);
    } catch (MQBrokerException e) {
        logger.error("RocketProducerDemo:sendMsg()->" + e.getMessage(), e);
    } catch (InterruptedException e) {
        logger.error("RocketProducerDemo:sendMsg()->" + e.getMessage(), e);
    }
    return false;
}