{"id":20459,"date":"2024-03-16T14:21:02","date_gmt":"2024-03-16T05:21:02","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/kafka%e3%81%af%e3%83%a1%e3%83%83%e3%82%bb%e3%83%bc%e3%82%b8%e3%81%ae%e9%80%81%e5%8f%97%e4%bf%a1%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e8%a1%8c%e3%81%84%e3%81%be%e3%81%99%e3%81%8b\/"},"modified":"2025-08-07T01:55:56","modified_gmt":"2025-08-06T16:55:56","slug":"kafka%e3%81%af%e3%83%a1%e3%83%83%e3%82%bb%e3%83%bc%e3%82%b8%e3%81%ae%e9%80%81%e5%8f%97%e4%bf%a1%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e8%a1%8c%e3%81%84%e3%81%be%e3%81%99%e3%81%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/kafka%e3%81%af%e3%83%a1%e3%83%83%e3%82%bb%e3%83%bc%e3%82%b8%e3%81%ae%e9%80%81%e5%8f%97%e4%bf%a1%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e8%a1%8c%e3%81%84%e3%81%be%e3%81%99%e3%81%8b\/","title":{"rendered":"kafka\u306f\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u9001\u53d7\u4fe1\u3092\u3069\u306e\u3088\u3046\u306b\u884c\u3044\u307e\u3059\u304b\uff1f"},"content":{"rendered":"<p>Kafka\u3067\u306f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u9001\u53d7\u4fe1\u306b\u30d7\u30ed\u30c7\u30e5\u30fc\u30b5\u30fc\u3068\u30b3\u30f3\u30b7\u30e5\u30fc\u30de\u30fc\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3059\u308b\u3002<\/p>\n<ol>\n<li>\u6700\u521d\u3001\u751f\u7523\u8005\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3057\u3001\u95a2\u9023\u3059\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li>\u9001\u4fe1\u3059\u308b<\/li>\n<\/ol>\n<p>\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d7\u4fe1\u3057\u307e\u3057\u305f\u3002<\/p>\n<ol>\n<li>\u6700\u521d\u306b\u3001\u6d88\u8cbb\u8005\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3057\u3001\u95a2\u9023\u3059\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<li>\u8cfc\u8aad\u3059\u308b\uff08subscribe\u3059\u308b\uff09<\/li>\n<li>poll()\u95a2\u6570<\/li>\n<li>\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d7\u3051\u53d6\u3063\u305f\u3089\u51e6\u7406\u3059\u308b\u3002<\/li>\n<\/ol>\n<p>\u4ee5\u4e0b\u306f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u53d7\u4fe1\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3059\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\uff1a<\/p>\n<p>\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3059\u308b<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> org.apache.kafka.clients.producer.*;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">ProducerExample<\/span> {\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\">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(<span class=\"hljs-string\">\"bootstrap.servers\"<\/span>, <span class=\"hljs-string\">\"localhost:9092\"<\/span>);\r\n        props.put(<span class=\"hljs-string\">\"key.serializer\"<\/span>, <span class=\"hljs-string\">\"org.apache.kafka.common.serialization.StringSerializer\"<\/span>);\r\n        props.put(<span class=\"hljs-string\">\"value.serializer\"<\/span>, <span class=\"hljs-string\">\"org.apache.kafka.common.serialization.StringSerializer\"<\/span>);\r\n\r\n        Producer&lt;String, String&gt; producer = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">KafkaProducer<\/span>&lt;&gt;(props);\r\n\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">topic<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"my-topic\"<\/span>;\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">message<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"Hello, Kafka!\"<\/span>;\r\n\r\n        ProducerRecord&lt;String, String&gt; record = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ProducerRecord<\/span>&lt;&gt;(topic, message);\r\n\r\n        producer.send(record, <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Callback<\/span>() {\r\n            <span class=\"hljs-meta\">@Override<\/span>\r\n            <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">onCompletion<\/span><span class=\"hljs-params\">(RecordMetadata metadata, Exception exception)<\/span> {\r\n                <span class=\"hljs-keyword\">if<\/span> (exception != <span class=\"hljs-literal\">null<\/span>) {\r\n                    System.err.println(<span class=\"hljs-string\">\"Failed to send message: \"<\/span> + exception.getMessage());\r\n                } <span class=\"hljs-keyword\">else<\/span> {\r\n                    System.out.println(<span class=\"hljs-string\">\"Message sent successfully! Offset: \"<\/span> + metadata.offset());\r\n                }\r\n            }\r\n        });\r\n\r\n        producer.close();\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d7\u4fe1\u3059\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> org.apache.kafka.clients.consumer.*;\r\n<span class=\"hljs-keyword\">import<\/span> org.apache.kafka.common.*;\r\n\r\n<span class=\"hljs-keyword\">import<\/span> java.time.Duration;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.Collections;\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_\">ConsumerExample<\/span> {\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\">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(<span class=\"hljs-string\">\"bootstrap.servers\"<\/span>, <span class=\"hljs-string\">\"localhost:9092\"<\/span>);\r\n        props.put(<span class=\"hljs-string\">\"key.deserializer\"<\/span>, <span class=\"hljs-string\">\"org.apache.kafka.common.serialization.StringDeserializer\"<\/span>);\r\n        props.put(<span class=\"hljs-string\">\"value.deserializer\"<\/span>, <span class=\"hljs-string\">\"org.apache.kafka.common.serialization.StringDeserializer\"<\/span>);\r\n        props.put(<span class=\"hljs-string\">\"group.id\"<\/span>, <span class=\"hljs-string\">\"my-group\"<\/span>);\r\n\r\n        Consumer&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-type\">String<\/span> <span class=\"hljs-variable\">topic<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"my-topic\"<\/span>;\r\n\r\n        consumer.subscribe(Collections.singletonList(topic));\r\n\r\n        <span class=\"hljs-keyword\">while<\/span> (<span class=\"hljs-literal\">true<\/span>) {\r\n            ConsumerRecords&lt;String, String&gt; records = consumer.poll(Duration.ofSeconds(<span class=\"hljs-number\">1<\/span>));\r\n\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>\u3053\u306e\u30b3\u30fc\u30c9\u306fJava\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u81ea\u5206\u306e\u8981\u4ef6\u306b\u5408\u308f\u305b\u3066\u4ed6\u306e\u8a00\u8a9e\u3084Kafka\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u9078\u629e\u3057\u3066\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u9001\u53d7\u4fe1\u3092\u884c\u3046\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kafka\u3067\u306f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u9001\u53d7\u4fe1\u306b\u30d7\u30ed\u30c7\u30e5\u30fc\u30b5\u30fc\u3068\u30b3\u30f3\u30b7\u30e5\u30fc\u30de\u30fc\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3059\u308b\u3002 \u6700\u521d\u3001\u751f\u7523\u8005\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3057\u3001\u95a2\u9023\u3059\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8a2d\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002 \u9001\u4fe1\u3059\u308b \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d7\u4fe1 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-20459","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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