{"id":132897,"date":"2024-03-26T01:16:32","date_gmt":"2024-03-25T16:16:32","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7kafka%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/"},"modified":"2024-03-27T05:50:29","modified_gmt":"2024-03-26T20:50:29","slug":"java%e3%81%a7kafka%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7kafka%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/","title":{"rendered":"Java\u3067Kafka\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p>Java\u3067Kafka\u3092\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001\u6700\u521d\u306bKafka\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002Maven\u306epom.xml\u30d5\u30a1\u30a4\u30eb\u306b\u3001\u4e0b\u8a18\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u8ffd\u52a0\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">dependency<\/span>&gt;<\/span>\r\n<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">groupId<\/span>&gt;<\/span>org.apache.kafka<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">groupId<\/span>&gt;<\/span>\r\n<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">artifactId<\/span>&gt;<\/span>kafka-clients<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">artifactId<\/span>&gt;<\/span>\r\n<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">version<\/span>&gt;<\/span>2.8.0<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">version<\/span>&gt;<\/span>\r\n<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">dependency<\/span>&gt;<\/span>\r\n<\/code><\/pre>\n<p>\u6b21\u306b\u3001\u6b21\u306e\u77ed\u3044\u4f8b\u306b\u793a\u3059\u3088\u3046\u306b\u3001Kafka\u306eJava\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3092\u4f7f\u3063\u3066\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u3001Java\u3092\u4f7f\u3063\u3066\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u53d7\u4fe1\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> org.apache.kafka.clients.producer.*;\r\n<span class=\"hljs-keyword\">import<\/span> org.apache.kafka.clients.consumer.*;\r\n<span class=\"hljs-keyword\">import<\/span> java.util.Properties;\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">KafkaExample<\/span> {\r\n<span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">final<\/span> <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-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">final<\/span> <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">BOOTSTRAP_SERVERS<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"localhost:9092\"<\/span>;\r\n<span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">final<\/span> <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">GROUP_ID<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"my-group\"<\/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-comment\">\/\/ \u521b\u5efa\u751f\u4ea7\u8005<\/span>\r\n<span class=\"hljs-type\">Properties<\/span> <span class=\"hljs-variable\">producerProps<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Properties<\/span>();\r\nproducerProps.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, BOOTSTRAP_SERVERS);\r\nproducerProps.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, <span class=\"hljs-string\">\"org.apache.kafka.common.serialization.StringSerializer\"<\/span>);\r\nproducerProps.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, <span class=\"hljs-string\">\"org.apache.kafka.common.serialization.StringSerializer\"<\/span>);\r\nProducer&lt;String, String&gt; producer = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">KafkaProducer<\/span>&lt;&gt;(producerProps);\r\n<span class=\"hljs-comment\">\/\/ \u53d1\u9001\u6d88\u606f<\/span>\r\nProducerRecord&lt;String, String&gt; record = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ProducerRecord<\/span>&lt;&gt;(TOPIC, <span class=\"hljs-string\">\"key\"<\/span>, <span class=\"hljs-string\">\"value\"<\/span>);\r\nproducer.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\nexception.printStackTrace();\r\n} <span class=\"hljs-keyword\">else<\/span> {\r\nSystem.out.printf(<span class=\"hljs-string\">\"Sent record to topic=%s, partition=%d, offset=%d%n\"<\/span>,\r\nmetadata.topic(), metadata.partition(), metadata.offset());\r\n}\r\n}\r\n});\r\n<span class=\"hljs-comment\">\/\/ \u5173\u95ed\u751f\u4ea7\u8005<\/span>\r\nproducer.close();\r\n<span class=\"hljs-comment\">\/\/ \u521b\u5efa\u6d88\u8d39\u8005<\/span>\r\n<span class=\"hljs-type\">Properties<\/span> <span class=\"hljs-variable\">consumerProps<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Properties<\/span>();\r\nconsumerProps.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, BOOTSTRAP_SERVERS);\r\nconsumerProps.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, <span class=\"hljs-string\">\"org.apache.kafka.common.serialization.StringDeserializer\"<\/span>);\r\nconsumerProps.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, <span class=\"hljs-string\">\"org.apache.kafka.common.serialization.StringDeserializer\"<\/span>);\r\nconsumerProps.put(ConsumerConfig.GROUP_ID_CONFIG, GROUP_ID);\r\nconsumerProps.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, <span class=\"hljs-string\">\"earliest\"<\/span>);\r\nConsumer&lt;String, String&gt; consumer = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">KafkaConsumer<\/span>&lt;&gt;(consumerProps);\r\n<span class=\"hljs-comment\">\/\/ \u8ba2\u9605\u4e3b\u9898\u5e76\u6d88\u8d39\u6d88\u606f<\/span>\r\nconsumer.subscribe(Collections.singletonList(TOPIC));\r\n<span class=\"hljs-keyword\">while<\/span> (<span class=\"hljs-literal\">true<\/span>) {\r\nConsumerRecords&lt;String, String&gt; records = consumer.poll(Duration.ofMillis(<span class=\"hljs-number\">100<\/span>));\r\n<span class=\"hljs-keyword\">for<\/span> (ConsumerRecord&lt;String, String&gt; record : records) {\r\nSystem.out.printf(<span class=\"hljs-string\">\"Received record: key=%s, value=%s%n\"<\/span>, record.key(), record.value());\r\n}\r\n}\r\n}\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u306e\u4f8b\u3067\u306f\u3001\u307e\u305a\u30d7\u30ed\u30c7\u30e5\u30fc\u30b5\u30fc\u3092\u4f5c\u6210\u3057\u3001ProducerConfig\u30af\u30e9\u30b9\u306e\u5b9a\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001Kafka\u30af\u30e9\u30b9\u30bf\u306e\u30a2\u30c9\u30ec\u30b9\u3001\u30ad\u30fc\u3068\u5024\u306e\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u65b9\u6cd5\u306a\u3069\u306e\u30d7\u30ed\u30c7\u30e5\u30fc\u30b5\u30fc\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u6b21\u306b\u3001\u30d7\u30ed\u30c7\u30e5\u30fc\u30b5\u30fc\u30ec\u30b3\u30fc\u30c9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001\u9001\u4fe1\u3059\u308b\u30c8\u30d4\u30c3\u30af\u3001\u30ad\u30fc\u3001\u5024\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u30d7\u30ed\u30c7\u30e5\u30fc\u30b5\u30fc\u306esend()\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u4f7f\u7528\u3057\u3066\u9001\u4fe1\u7d50\u679c\u3092\u51e6\u7406\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001\u30d7\u30ed\u30c7\u30e5\u30fc\u30b5\u30fc\u3092\u9589\u3058\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e\u3042\u3068\u3001\u79c1\u305f\u3061\u306fConsumer\u3092\u4f5c\u6210\u3057\u3001ConsumerConfig\u30af\u30e9\u30b9\u306e\u5b9a\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001Kafka\u30af\u30e9\u30b9\u30bf\u306e\u30a2\u30c9\u30ec\u30b9\u3001\u30ad\u30fc\u3068\u5024\u306e\u9006\u30b7\u30ea\u30a2\u30eb\u5316\u65b9\u6cd5\u3001\u30b3\u30f3\u30b7\u30e5\u30fc\u30de\u30b0\u30eb\u30fc\u30d7\u306a\u3069\u306e\u30b3\u30f3\u30b7\u30e5\u30fc\u30de\u30fc\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u79c1\u305f\u3061\u306f1\u3064\u306e\u30c8\u30d4\u30c3\u30af\u3092\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d6\u3057\u3001\u7121\u9650\u30eb\u30fc\u30d7\u306e\u4e2d\u3067poll()\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u79c1\u305f\u3061\u306f\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53cd\u5fa9\u51e6\u7406\u3057\u3001\u51e6\u7406\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u4f8b\u306f\u3001Kafka\u3092Java\u3067\u64cd\u4f5c\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3059\u5358\u7d14\u306a\u4f8b\u3067\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u5b9f\u969b\u306b\u306f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u51e6\u7406\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3057\u3001\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306b\u3001\u3088\u308a\u8907\u96d1\u306a\u30ed\u30b8\u30c3\u30af\u3068\u3088\u308a\u591a\u304f\u306e\u69cb\u6210\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067Kafka\u3092\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001\u6700\u521d\u306bKafka\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002Maven\u306epom.xml\u30d5\u30a1\u30a4\u30eb\u306b\u3001\u4e0b\u8a18\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u8ffd\u52a0\u3067\u304d\u307e\u3059\u3002 &lt;dependency&gt; &lt;groupId&#038; [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-132897","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>Java\u3067Kafka\u3092\u4f7f\u7528\u3059\u308b\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\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u3067kafka\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u3067Kafka\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\" \/>\n<meta property=\"og:description\" content=\"Java\u3067Kafka\u3092\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001\u6700\u521d\u306bKafka\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002Maven\u306epom.xml\u30d5\u30a1\u30a4\u30eb\u306b\u3001\u4e0b\u8a18\u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u8ffd\u52a0\u3067\u304d\u307e\u3059\u3002 &lt;dependency&gt; 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