* Producer，发送顺序消息
*/
public class Producer {
public static void main(String[] args) {
try {
MQProducer producer = new DefaultMQProducer("please_rename_unique_group_name");
producer.start();
String[] tags = new String[] { "TagA", "TagB", "TagC", "TagD", "TagE" };
for (int i = 0; i < 100; i++) {
// 订单ID相同的消息要有序
int orderId = i % 10;
Message msg =
new Message("TopicTestjjj", tags[i % tags.length], "KEY" + i,
("Hello RocketMQ " + i).getBytes());
SendResult sendResult = producer.send(msg, new MessageQueueSelector() {
@Override
public MessageQueue select(List<MessageQueue> mqs, Message msg, Object arg) {
Integer id = (Integer) arg;
int index = id % mqs.size();
return mqs.get(index);
}
}, orderId);
System.out.println(sendResult);
}
producer.shutdown();
}
catch (MQClientException e) {
e.printStackTrace();
}
catch (RemotingException e) {