{"id":99657,"date":"2024-03-22T01:20:09","date_gmt":"2024-03-21T16:20:09","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/kafka%e3%81%8b%e3%82%89%e3%83%ac%e3%82%b3%e3%83%bc%e3%83%89%e3%82%92%e6%8c%87%e5%ae%9a%e3%81%95%e3%82%8c%e3%81%9f%e3%82%aa%e3%83%95%e3%82%bb%e3%83%83%e3%83%88%e3%81%8b%e3%82%89%e8%aa%ad%e3%81%bf\/"},"modified":"2024-03-27T03:10:42","modified_gmt":"2024-03-26T18:10:42","slug":"kafka%e3%81%8b%e3%82%89%e3%83%ac%e3%82%b3%e3%83%bc%e3%83%89%e3%82%92%e6%8c%87%e5%ae%9a%e3%81%95%e3%82%8c%e3%81%9f%e3%82%aa%e3%83%95%e3%82%bb%e3%83%83%e3%83%88%e3%81%8b%e3%82%89%e8%aa%ad%e3%81%bf","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/kafka%e3%81%8b%e3%82%89%e3%83%ac%e3%82%b3%e3%83%bc%e3%83%89%e3%82%92%e6%8c%87%e5%ae%9a%e3%81%95%e3%82%8c%e3%81%9f%e3%82%aa%e3%83%95%e3%82%bb%e3%83%83%e3%83%88%e3%81%8b%e3%82%89%e8%aa%ad%e3%81%bf\/","title":{"rendered":"Kafka\u304b\u3089\u30ec\u30b3\u30fc\u30c9\u3092\u6307\u5b9a\u3055\u308c\u305f\u30aa\u30d5\u30bb\u30c3\u30c8\u304b\u3089\u8aad\u307f\u51fa\u3059\u65b9\u6cd5"},"content":{"rendered":"<p>\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u6307\u5b9a\u3057\u3066\u8aad\u307f\u51fa\u3059\u306b\u306fseek()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u4f8b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> org.apache.kafka.clients.consumer.ConsumerConfig;\r\n<span class=\"hljs-keyword\">import<\/span> org.apache.kafka.clients.consumer.ConsumerRecord;\r\n<span class=\"hljs-keyword\">import<\/span> org.apache.kafka.clients.consumer.ConsumerRecords;\r\n<span class=\"hljs-keyword\">import<\/span> org.apache.kafka.clients.consumer.KafkaConsumer;\r\n<span class=\"hljs-keyword\">import<\/span> org.apache.kafka.common.TopicPartition;\r\n\r\n<span class=\"hljs-keyword\">import<\/span> java.util.Arrays;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.Properties;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">KafkaOffsetReader<\/span> {\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> {\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">topicName<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"my_topic\"<\/span>;\r\n        <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">partition<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">0<\/span>;\r\n        <span class=\"hljs-type\">long<\/span> <span class=\"hljs-variable\">offset<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">100<\/span>;\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u8bbe\u7f6eKafka consumer\u7684\u914d\u7f6e<\/span>\r\n        <span class=\"hljs-type\">Properties<\/span> <span class=\"hljs-variable\">props<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Properties<\/span>();\r\n        props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, <span class=\"hljs-string\">\"localhost:9092\"<\/span>);\r\n        props.put(ConsumerConfig.GROUP_ID_CONFIG, <span class=\"hljs-string\">\"my_consumer_group\"<\/span>);\r\n        props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, <span class=\"hljs-string\">\"org.apache.kafka.common.serialization.StringDeserializer\"<\/span>);\r\n        props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, <span class=\"hljs-string\">\"org.apache.kafka.common.serialization.StringDeserializer\"<\/span>);\r\n\r\n        KafkaConsumer&lt;String, String&gt; consumer = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">KafkaConsumer<\/span>&lt;&gt;(props);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u521b\u5efaTopicPartition\u5bf9\u8c61\u6765\u6307\u5b9a\u8981\u8bfb\u53d6\u7684partition\u548coffset<\/span>\r\n        <span class=\"hljs-type\">TopicPartition<\/span> <span class=\"hljs-variable\">topicPartition<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">TopicPartition<\/span>(topicName, partition);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u4f7f\u7528seek()\u65b9\u6cd5\u6765\u6307\u5b9aoffset<\/span>\r\n        consumer.assign(Arrays.asList(topicPartition));\r\n        consumer.seek(topicPartition, offset);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u5f00\u59cb\u6d88\u8d39\u6d88\u606f<\/span>\r\n        <span class=\"hljs-keyword\">while<\/span> (<span class=\"hljs-literal\">true<\/span>) {\r\n            ConsumerRecords&lt;String, String&gt; records = consumer.poll(<span class=\"hljs-number\">100<\/span>);\r\n            <span class=\"hljs-keyword\">for<\/span> (ConsumerRecord&lt;String, String&gt; record : records) {\r\n                System.out.println(<span class=\"hljs-string\">\"Received message: \"<\/span> + record.value());\r\n            }\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u3067\u793a\u3057\u305f\u4f8b\u3067\u306f\u3001Kafka\u306e\u6d88\u8cbb\u8005\u3092\u4f5c\u6210\u3057\u3066\u3001seek()\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3057\u3066\u3001\u6307\u5b9a\u3055\u308c\u305f\u5024\u3078\u30b3\u30f3\u30b7\u30e5\u30fc\u30de\u30fc\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u8a2d\u5b9a\u3057\u307e\u3057\u305f\u3002\u305d\u306e\u5f8c\u3001poll()\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3057\u3066\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d6\u5f97\u3057\u3001\u6307\u5b9a\u3055\u308c\u305f\u30aa\u30d5\u30bb\u30c3\u30c8\u304b\u3089\u6d88\u8cbb\u3092\u59cb\u3081\u307e\u3057\u305f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u6307\u5b9a\u3057\u3066\u8aad\u307f\u51fa\u3059\u306b\u306fseek()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002 \u4ee5\u4e0b\u306e\u4f8b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 import org.apache.kafka.clients.consumer.ConsumerConfig; impor [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-99657","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Kafka\u304b\u3089\u30ec\u30b3\u30fc\u30c9\u3092\u6307\u5b9a\u3055\u308c\u305f\u30aa\u30d5\u30bb\u30c3\u30c8\u304b\u3089\u8aad\u307f\u51fa\u3059\u65b9\u6cd5 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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content=\"https:\/\/www.silicloud.com\/ja\/blog\/kafka\u304b\u3089\u30ec\u30b3\u30fc\u30c9\u3092\u6307\u5b9a\u3055\u308c\u305f\u30aa\u30d5\u30bb\u30c3\u30c8\u304b\u3089\u8aad\u307f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-21T16:20:09+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-26T18:10:42+00:00\" \/>\n<meta name=\"author\" content=\"\u6d77\u6597, \u8475\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6d77\u6597, \u8475\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u5206\" \/>\n<script type=\"application\/ld+json\" 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\u8475\"},\"url\":\"https:\/\/www.silicloud.com\/ja\/blog\/author\/kaitoaoi\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/kafka%e3%81%8b%e3%82%89%e3%83%ac%e3%82%b3%e3%83%bc%e3%83%89%e3%82%92%e6%8c%87%e5%ae%9a%e3%81%95%e3%82%8c%e3%81%9f%e3%82%aa%e3%83%95%e3%82%bb%e3%83%83%e3%83%88%e3%81%8b%e3%82%89%e8%aa%ad%e3%81%bf\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Kafka\u304b\u3089\u30ec\u30b3\u30fc\u30c9\u3092\u6307\u5b9a\u3055\u308c\u305f\u30aa\u30d5\u30bb\u30c3\u30c8\u304b\u3089\u8aad\u307f\u51fa\u3059\u65b9\u6cd5 - Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/ja\/blog\/kafka\u304b\u3089\u30ec\u30b3\u30fc\u30c9\u3092\u6307\u5b9a\u3055\u308c\u305f\u30aa\u30d5\u30bb\u30c3\u30c8\u304b\u3089\u8aad\u307f\/","og_locale":"ja_JP","og_type":"article","og_title":"Kafka\u304b\u3089\u30ec\u30b3\u30fc\u30c9\u3092\u6307\u5b9a\u3055\u308c\u305f\u30aa\u30d5\u30bb\u30c3\u30c8\u304b\u3089\u8aad\u307f\u51fa\u3059\u65b9\u6cd5","og_description":"\u30aa\u30d5\u30bb\u30c3\u30c8\u3092\u6307\u5b9a\u3057\u3066\u8aad\u307f\u51fa\u3059\u306b\u306fseek()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002 \u4ee5\u4e0b\u306e\u4f8b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002 import org.apache.kafka.clients.consumer.ConsumerConfig; impor 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