{"id":1487,"date":"2023-03-24T22:45:35","date_gmt":"2023-03-24T14:45:35","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1487"},"modified":"2023-04-28T20:30:39","modified_gmt":"2023-04-28T12:30:39","slug":"rocketmq-delay-message","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/24\/rocketmq-delay-message\/","title":{"rendered":"RocketMQ\u5ef6\u65f6\u6d88\u606f"},"content":{"rendered":"

RocketMQ\u5ef6\u65f6\u6d88\u606f<\/h2>\n

RocketMQ\u63d0\u4f9b\u4e00\u79cd\u5ef6\u65f6\u6d88\u606f\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u5c31\u662f\u5728\u7279\u5b9a\u7684\u65f6\u95f4\u5230\u4e86\uff0c\u6d88\u606f\u624d\u4f1a\u88ab\u6295\u9012\u51fa\u53bb\u4f9bconsumer\u6d88\u8d39\u3002<\/p>\n

\u603b\u4f53\u6765\u8bf4\u53ef\u4ee5\u6ee1\u8db3\u7b80\u5355\u7684\u573a\u666f\u662f\uff0c\u4f46\u662f\u9700\u8981\u6ce8\u610f\u7684\u662f\u5ef6\u65f6\u7684\u65f6\u95f4\u662f\u9700\u8981\u6309\u7167\u5185\u7f6e\u7684\u5ef6\u65f6\u7ea7\u522b\u53bb\u914d\u7f6e\u7684\uff0c\u800c\u4e0d\u662f\u968f\u610f\u8bbe\u7f6e\u6d88\u606f\u7684\u5ef6\u65f6\u65f6\u95f4\u3002<\/p>\n

<\/p>\n

\u5982\u679c\u60f3\u4e0d\u53d7\u5ef6\u65f6\u7ea7\u522b\u7684\u7ea6\u675f\uff0c\u53ef\u4ee5\u53c2\u8003\uff1ahttp:\/\/blog.seoui.com\/2017\/08\/19\/delayqueue\/<\/a><\/p>\n

\u9ed8\u8ba4\u7684\u5ef6\u8fdf\u7ea7\u522b<\/p>\n

messageDelayLevel=1s 5s 10s 30s 1m 2m 3m 4m 5m 6m 7m 8m 9m 10m 20m 30m 1h 2h<\/code><\/pre>\n
\u8fd9\u4e2a\u914d\u7f6e\u4e0b\u6807\u4ece1\u5f00\u59cb\uff0c\u6bd4\u5982\u7ea7\u522b2\u662f\u5ef6\u65f65\u79d2\u3001\u7ea7\u522b5\u662f\u5ef6\u65f61\u5206\u949f\u3002\u9ed8\u8ba4\u914d\u7f6e\u5728\u4e0d\u6ee1\u8db3\u9700\u6c42\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u5728broker<\/code>\u914d\u7f6e\u6587\u4ef6\u52a0\u5165messageDelayLevel<\/code>\u53c2\u6570\u8986\u76d6\u9ed8\u8ba4\u7684\u5ef6\u65f6\u7ea7\u522b\u914d\u7f6e\u3002<\/p>\n
RocketMQ\u53d1\u9001\u5ef6\u65f6\u6d88\u606f<\/h2>\n
\u548c\u666e\u901a\u7684\u6d88\u606f\u4e0d\u540c\u4e4b\u5904\u5728\u4e8eProducer\u5728\u53d1\u9001\u6d88\u606f\u7684\u65f6\u5019\uff0c\u9700\u8981\u8bbe\u7f6emessage.setDelayTimeLevel();<\/code>\u5ef6\u8fdf\u7ea7\u522b\u65b9\u6cd5\uff0c\u5176\u4ed6\u53c2\u6570\u548c\u6d88\u8d39\u7aef\u7684\u5199\u6cd5\u5e76\u65e0\u4e0d\u540c\u4e4b\u5904\u3002<\/p>\n
Producer<\/h3>\n
public class ScheduledMessageProducer {\n    public static void main(String[] args) throws Exception {\n        DefaultMQProducer producer = \n            new DefaultMQProducer("ExampleProducerGroup");\n        producer.start();\n        int totalMessagesToSend = 100;\n        for (int i = 0; i < totalMessagesToSend; i++) {\n            Message message = new Message("TestTopic",\n                ("Hello scheduled message " + i).getBytes());\n            \/\/\u5ef6\u65f6\u7684\u7ea7\u522b\u4e3a3 \u5bf9\u5e94\u7684\u65f6\u95f4\u4e3a10s \u5c31\u662f\u53d1\u9001\u540e\u5ef6\u65f610S\u5728\u628a\u6d88\u606f\u6295\u9012\u51fa\u53bb\n            message.setDelayTimeLevel(3);\n            producer.send(message);\n        }\n        producer.shutdown();\n    }\n}<\/code><\/pre>\n
Consumer<\/h3>\n
public class ScheduledMessageConsumer {\n    public static void main(String[] args) throws Exception {\n        DefaultMQPushConsumer consumer = \n            new DefaultMQPushConsumer("ExampleConsumer");\n        consumer.subscribe("TestTopic", "*");\n        consumer.registerMessageListener(new MessageListenerConcurrently() {\n            @Override\n            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> messages,\n            ConsumeConcurrentlyContext context) {\n                for (MessageExt message : messages) {\n                    System.out.println("ok!");\n                }\n                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;\n            }\n        });\n        consumer.start();\n    }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
RocketMQ\u5ef6\u65f6\u6d88\u606f RocketMQ\u63d0\u4f9b\u4e00\u79cd\u5ef6\u65f6\u6d88\u606f\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u5c31\u662f\u5728\u7279\u5b9a\u7684\u65f6\u95f4\u5230\u4e86\uff0c\u6d88\u606f\u624d\u4f1a\u88ab\u6295\u9012\u51fa\u53bb […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30],"tags":[],"class_list":["post-1487","post","type-post","status-publish","format-standard","hentry","category-rocketmq"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1487","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1487"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1487\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}