{"id":792,"date":"2023-08-22T12:22:34","date_gmt":"2023-08-22T04:22:34","guid":{"rendered":"https:\/\/zhaocunwei.co.uk\/?p=792"},"modified":"2023-08-22T12:30:33","modified_gmt":"2023-08-22T04:30:33","slug":"rocketmq","status":"publish","type":"post","link":"https:\/\/zhaocunwei.co.uk\/index.php\/2023\/08\/22\/rocketmq\/","title":{"rendered":"\u638c\u63e1RocketMQ\u6d88\u8d39\u8005\u9ad8\u7ea7\u65b9\u6848\uff0c\u771f\u6b63\u7406\u89e3Offset\u5b58\u50a8\u3001\u6d88\u8d39\u7aef\u91cd\u8bd5\u3001\u5e42\u7b49\u7b56\u7565"},"content":{"rendered":"

\u524d\u8a00<\/h1>\n

RocketMQ \u662f\u4e00\u6b3e\u5f3a\u5927\u7684\u6d88\u606f\u4e2d\u95f4\u4ef6\uff0c\u5177\u5907\u9ad8\u53ef\u7528\u6027\u3001\u9ad8\u6027\u80fd\u548c\u53ef\u4f38\u7f29\u6027\u7b49\u7279\u70b9\u3002<\/p>\n

Offset\u5b58\u50a8\u673a\u5236<\/h1>\n

Offset\u662f\u6d88\u8d39\u8005\u7528\u6765\u6807\u8bc6\u6d88\u606f\u6d88\u8d39\u8be6\u60c5\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\u3002\u5728RocketMQ\u4e2d\uff0c\u6bcf\u4e2a\u6d88\u8d39\u8005\u90fd\u4f1a\u7ef4\u62a4\u4e00\u4e2a\u6d88\u8d39\u8be6\u60c5Offset\uff0c\u8868\u793a\u6d88\u8d39\u5230\u4e86\u54ea\u4e00\u6761\u6d88\u606f\u3002Offset\u5b58\u50a8\u53ef\u4ee5\u5206\u4e3a\u4e24\u79cd\u65b9\u5f0f\uff1a\u672c\u5730\u5b58\u50a8\u548c\u8fdc\u7a0b\u5b58\u50a8\u3002\u672c\u5730\u5b58\u50a8\u901a\u5e38\u662f\u4fdd\u5b58\u5728\u6d88\u8d39\u8005\u7aef\u7684\u672c\u5730\u6587\u4ef6\u4e2d\uff0c\u8fdc\u7a0b\u5b58\u50a8\u901a\u5e38\u662f\u4fdd\u5b58\u5728 RocketMQ \u7684 Broker \u670d\u52a1\u5668\u4e0a\u3002
\nOffset \u5b58\u50a8\u7684\u76ee\u7684\u662f\u786e\u4fdd\u5373\u4f7f\u6d88\u8d39\u8005\u91cd\u542f\uff0c\u4e5f\u53ef\u4ee5\u4ece\u4e0a\u6b21\u7684\u6d88\u8d39\u7ec6\u8282\u6765\u770b\u7ee7\u7eed\u6d88\u8d39\u3002
\nRocketMQ \u901a\u8fc7OffsetStore\u6765\u7ba1\u7406\u6d88\u8d39\u8be6\u60c5 Offset\u3002\u901a\u5e38\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528LocalFileOffsetStore\u6765\u672c\u5730\u5b58\u50a8 Offset\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528 RocketMQ Java \u5ba2\u6237\u7aef\u7684\u793a\u4f8b\uff1a<\/p>\n

import org.apache.rocketmq.client.consumer.DefaultMQConsumer;\nimport org.apache.rocketmq.client.exception.MQClientException;\nimport org.apache.rocketmq.client.impl.consumer.DefaultMQPushConsumerImpl;\nimport org.apache.rocketmq.client.log.ClientLogger;\nimport org.apache.rocketmq.common.consumer.ConsumeFromWhere;\nimport org.apache.rocketmq.common.protocol.heartbeat.MessageModel;\n\nimport java.util.concurrent.TimeUnit;\n\npublic class OffsetStorageExample {\n    public static void main(String[] args) throws InterruptedException, MQClientException {\n        DefaultMQConsumer consumer = new DefaultMQConsumer("consumer_group");\n        consumer.setNamesrvAddr("rocketmq-nameserver-ip:9876");\n        \/\/ \u8bbe\u7f6e\u6d88\u8d39\u8fdb\u5ea6\u5b58\u50a8\u65b9\u5f0f\u4e3a\u672c\u5730\u6587\u4ef6\n        consumer.setOffsetStore(new LocalFileOffsetStore());\n        consumer.subscribe("TopicTest", "*");\n        consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_LAST_OFFSET);\n        consumer.setMessageModel(MessageModel.CLUSTERING);\n        consumer.registerMessageListener((List<MessageExt> msgs, ConsumeConcurrentlyContext context) -> {\n            for (MessageExt msg : msgs) {\n                \/\/ \u5904\u7406\u6d88\u606f\u903b\u8f91\n                System.out.printf("Receive New Messages: %s %n", msg);\n            }\n            return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;\n        });\n        consumer.start();\n        System.out.println("Consumer Started");\n\n        TimeUnit.SECONDS.sleep(3600);\n        consumer.shutdown();\n    }\n}<\/code><\/pre>\n
\u6d88\u8d39\u7aef\u91cd\u8bd5<\/h1>\n
\u6d88\u606f\u4e2d\u95f4\u4ef6\u901a\u5e38\u4f1a\u4fdd\u8bc1\u6d88\u606f\u7684\u53ef\u9760\u6295\u9012\uff0c\u4f46\u6d88\u8d39\u7aef\u5728\u5904\u7406\u6d88\u606f\u65f6\u53ef\u80fd\u4f1a\u9047\u5230\u5f02\u5e38\uff0c\u4f8b\u5982\u7f51\u7edc\u95ee\u9898\u3001\u4e1a\u52a1\u5f02\u5e38\u7b49\u3002\u4e3a\u4e86\u4fdd\u8bc1\u6d88\u606f\u4e0d\u4f1a\u4e22\u5931\uff0cRocketMQ \u5141\u8bb8\u6d88\u8d39\u8005\u5f00\u542f\u6d88\u606f\u91cd\u8bd5\u673a\u5236\u3002\u5f53\u6d88\u8d39\u8005\u5904\u7406\u6d88\u606f\u5931\u8d25\u65f6\uff0cRocketMQ \u5c06\u6d88\u606f\u91cd\u65b0\u6295\u9012\u7ed9\u6d88\u8d39\u8005\uff0c\u76f4\u5230\u8fbe\u5230\u6700\u5927\u91cd\u8bd5\u6b21\u6570\u7edf\u8ba1\u3002<\/p>\n
consumer.registerMessageListener((List<MessageExt> msgs, ConsumeConcurrentlyContext context) -> {\n    for (MessageExt msg : msgs) {\n        try {\n            \/\/ \u5904\u7406\u6d88\u606f\u903b\u8f91\n            int result = processMessage(msg);\n            if (result == 1) {\n                \/\/ \u6d88\u606f\u5904\u7406\u6210\u529f\n                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;\n            } else {\n                \/\/ \u6d88\u606f\u5904\u7406\u5931\u8d25\uff0cRocketMQ \u4f1a\u81ea\u52a8\u8fdb\u884c\u91cd\u8bd5\n                return ConsumeConcurrentlyStatus.RECONSUME_LATER;\n            }\n        } catch (Exception e) {\n            \/\/ \u5f02\u5e38\u5904\u7406\uff0cRocketMQ \u4f1a\u81ea\u52a8\u8fdb\u884c\u91cd\u8bd5\n            return ConsumeConcurrentlyStatus.RECONSUME_LATER;\n        }\n    }\n    return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;\n});<\/code><\/pre>\n
\u5e42\u7b49\u7b56\u7565<\/h1>\n
\u5e42\u7b49\u662f\u6307\u5bf9\u540c\u4e00\u64cd\u4f5c\u7684\u591a\u6b21\u6267\u884c\u5177\u6709\u76f8\u540c\u7684\u7ed3\u679c\uff0c\u4e0d\u4f1a\u4ea7\u751f\u989d\u5916\u7684\u540e\u679c\u3002\u5728\u6d88\u606f\u5904\u7406\u4e2d\uff0c\u5e42\u7b49\u6027\u975e\u5e38\u91cd\u8981\uff0c\u56e0\u4e3a\u91cd\u8bd5\u673a\u5236\u53ef\u80fd\u5bfc\u81f4\u540c\u4e00\u6d88\u606f\u88ab\u591a\u6b21\u5904\u7406\u6d88\u8d39\u8005\u9700\u8981\u5b9e\u73b0\u5e42\u7b49\u7b56\u7565\u6765\u786e\u4fdd\u5904\u7406\u6d88\u606f\u7684\u7ed3\u679c\u662f\u4e00\u81f4\u7684\u3002<\/p>\n
\/\/ \u5047\u8bbe\u6d88\u606f\u4e2d\u6709\u4e00\u4e2a\u552f\u4e00\u7684\u6807\u8bc6\u5b57\u6bb5 messageKey\npublic int processMessage(MessageExt msg) {\n    String messageKey = msg.getKeys();\n    \/\/ \u68c0\u67e5\u6d88\u606f\u662f\u5426\u5df2\u7ecf\u5904\u7406\u8fc7\uff0c\u5982\u679c\u5df2\u5904\u7406\uff0c\u8fd4\u56de 1 \u8868\u793a\u6210\u529f\n    if (isMessageProcessed(messageKey)) {\n        return 1;\n    }\n    \/\/ \u5904\u7406\u6d88\u606f\u7684\u4e1a\u52a1\u903b\u8f91\n    \/\/ \u5904\u7406\u6210\u529f\u540e\uff0c\u6807\u8bb0\u6d88\u606f\u4e3a\u5df2\u5904\u7406\n    markMessageAsProcessed(messageKey);\n    return 1;\n}\n\/\/ \u5224\u65ad\u6d88\u606f\u662f\u5426\u5df2\u7ecf\u5904\u7406\u8fc7\nprivate boolean isMessageProcessed(String messageKey) {\n    \/\/ \u6839\u636e\u4e1a\u52a1\u903b\u8f91\u68c0\u67e5\u6d88\u606f\u662f\u5426\u5df2\u7ecf\u5904\u7406\u8fc7\n    \/\/ \u5982\u679c\u5df2\u5904\u7406\u8fc7\uff0c\u8fd4\u56de true\uff1b\u5426\u5219\uff0c\u8fd4\u56de false\n}\n\/\/ \u6807\u8bb0\u6d88\u606f\u4e3a\u5df2\u5904\u7406\nprivate void markMessageAsProcessed(String messageKey) {\n    \/\/ \u6839\u636e\u4e1a\u52a1\u903b\u8f91\u6807\u8bb0\u6d88\u606f\u4e3a\u5df2\u5904\u7406\n}<\/code><\/pre>\n
Spring Boot \u96c6\u6210 RocketMQ\uff1a<\/h1>\n
\u8981\u5728 Spring Boot \u9879\u76ee\u4e2d\u96c6\u6210 RocketMQ\uff0c\u60a8\u9700\u8981\u6dfb\u52a0\u76f8\u5173\u7684\u4f9d\u8d56\uff0c\u914d\u7f6e RocketMQ \u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\uff0c\u5e76\u7f16\u5199\u6d88\u606f\u5904\u7406\u903b\u8f91\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684 Spring Boot \u96c6\u6210 RocketMQ \u7684\u793a\u4f8b\uff1a<\/p>\n
<dependency>\n    <groupId>org.apache.rocketmq<\/groupId>\n    <artifactId>rocketmq-spring-boot-starter<\/artifactId>\n    <version>\u6700\u65b0\u7248\u672c<\/version>\n<\/dependency><\/code><\/pre>\n
\u914d\u7f6e\u751f\u4ea7\u8005\uff1a
\n\u5728application.properties\u6216application.yml\u4e2d\u914d\u7f6eRocketMQ\u5236\u4f5c\u8005\u7684\u76f8\u5173\u4fe1\u606f\uff1a<\/p>\n
rocketmq.producer.group=your_producer_group\nrocketmq.name-server=rocketmq-nameserver-ip:9876<\/code><\/pre>\n
import org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.messaging.Message;\nimport org.springframework.messaging.support.MessageBuilder;\nimport org.springframework.stereotype.Service;\n@Service\npublic class MessageProducerService {\n    @Autowired\n    private RocketMQTemplate rocketMQTemplate;\n    public void sendMessage(String topic, String content) {\n        Message<String> message = MessageBuilder.withPayload(content).build();\n        rocketMQTemplate.send(topic, message);\n    }\n}<\/code><\/pre>\n
\u6d88\u8d39\u8005\u914d\u7f6e\uff1a<\/p>\n
rocketmq.consumer.group=your_consumer_group\nrocketmq.name-server=rocketmq-nameserver-ip:9876\nrocketmq.consumer.topics=TopicTest<\/code><\/pre>\n
import org.apache.rocketmq.spring.annotation.RocketMQMessageListener;\nimport org.apache.rocketmq.spring.core.RocketMQListener;\nimport org.springframework.stereotype.Service;\n\n@Service\n@RocketMQMessageListener(topic = "TopicTest", consumerGroup = "your_consumer_group")\npublic class MessageConsumer implements RocketMQListener<String> {\n    @Override\n    public void onMessage(String message) {\n        \/\/ \u5904\u7406\u6d88\u606f\u7684\u4e1a\u52a1\u903b\u8f91\n        System.out.println("Received message: " + message);\n    }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u524d\u8a00 RocketMQ \u662f\u4e00\u6b3e\u5f3a\u5927\u7684\u6d88\u606f\u4e2d\u95f4\u4ef6\uff0c\u5177\u5907\u9ad8\u53ef\u7528\u6027\u3001\u9ad8\u6027\u80fd\u548c\u53ef\u4f38\u7f29\u6027\u7b49\u7279\u70b9\u3002 Offset\u5b58\u50a8\u673a\u5236  […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false},"categories":[1],"tags":[],"aioseo_notices":[],"yoast_head":"\n\u638c\u63e1RocketMQ\u6d88\u8d39\u8005\u9ad8\u7ea7\u65b9\u6848\uff0c\u771f\u6b63\u7406\u89e3Offset\u5b58\u50a8\u3001\u6d88\u8d39\u7aef\u91cd\u8bd5\u3001\u5e42\u7b49\u7b56\u7565 - \u672c\u7f51\u7ad9\u5206\u4eab\u7f16\u7a0b\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u7684bug<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zhaocunwei.co.uk\/index.php\/2023\/08\/22\/rocketmq\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u638c\u63e1RocketMQ\u6d88\u8d39\u8005\u9ad8\u7ea7\u65b9\u6848\uff0c\u771f\u6b63\u7406\u89e3Offset\u5b58\u50a8\u3001\u6d88\u8d39\u7aef\u91cd\u8bd5\u3001\u5e42\u7b49\u7b56\u7565 - 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