RockChuLee commented on code in PR #166:
URL: https://github.com/apache/rocketmq-site/pull/166#discussion_r934046346
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docs/09-英文/02-Producer/07message3.md:
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+# Delay Message Sending
+
+The delay message sending means that when a message is sent to Apache
RocketMQ, instead of delivering the message immediately, it is delivered to the
Consumer for consumption after delaying a certain period of time.
+
+Apache RocketMQ supports a total of 18 levels of delayed delivery, the detail
is as follows:
+
+| delay level | delay time | delay level | delay time |
+|-------------------|------|-------------------|-------|
+| 1 | 1s | 10 | 6min |
+| 2 | 5s | 11 | 7min |
+| 3 | 10s | 12 | 8min |
+| 4 | 30s | 13 | 9min |
+| 5 | 1min | 14 | 10min |
+| 6 | 2min | 15 | 20min |
+| 7 | 3min | 16 | 30min |
+| 8 | 4min | 17 | 1h |
+| 9 | 5min | 18 | 2h |
+
+The sample code for the delay message sending is as follows:
+
+```javascript {10,11}
+public class ScheduledMessageProducer {
+ public static void main(String[] args) throws Exception {
+ // Instantiate a producer to send scheduled messages
+ DefaultMQProducer producer = new
DefaultMQProducer("ExampleProducerGroup");
+ // Launch producer
+ producer.start();
+ int totalMessagesToSend = 100;
+ for (int i = 0; i < totalMessagesToSend; i++) {
+ Message message = new Message("TestTopic", ("Hello scheduled
message " + i).getBytes());
+ // This message will be delivered to consumer 10 seconds later.
+ message.setDelayTimeLevel(3);
+ // Send the message
+ producer.send(message);
+ }
+
+ // Shutdown producer after use.
+ producer.shutdown();
+ }
+
+}
+```
+:::tip
+The most important thing is to set the delay level for the message. In the
above sample code, the delay level is set to 3, which means that after the
sender sends the message, it takes 10s for the consumer to receive it
Review Comment:
Hi, @tsunghanjacktsai ,
Nice to talk with you, your suggestion is good. I solve all them and learn a
lot. Thanks
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