{"id":117330,"date":"2024-03-23T09:59:31","date_gmt":"2024-03-23T00:59:31","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/kafka%e3%81%ae%e8%86%a8%e5%a4%a7%e3%81%aa%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ab%e6%9b%b8%e3%81%8d%e8%be%bc%e3%82%80%e3%81%ab%e3%81%af%e3%81%a9%e3%81%86\/"},"modified":"2024-04-05T20:25:50","modified_gmt":"2024-04-05T11:25:50","slug":"kafka%e3%81%ae%e8%86%a8%e5%a4%a7%e3%81%aa%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ab%e6%9b%b8%e3%81%8d%e8%be%bc%e3%82%80%e3%81%ab%e3%81%af%e3%81%a9%e3%81%86","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/kafka%e3%81%ae%e8%86%a8%e5%a4%a7%e3%81%aa%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%ab%e6%9b%b8%e3%81%8d%e8%be%bc%e3%82%80%e3%81%ab%e3%81%af%e3%81%a9%e3%81%86\/","title":{"rendered":"kafka\u306e\u81a8\u5927\u306a\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u306b\u306f\u3069\u3046\u3059\u308c\u3070"},"content":{"rendered":"<p>Kafka\u304b\u3089\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u51fa\u3059\u306b\u306f\u3001Kafka\u306eConsumer API\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u6d88\u8cbb\u3057\u3001\u30d5\u30a1\u30a4\u30eb\u3092\u66f8\u304d\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e Java \u3067\u8a18\u8ff0\u3055\u308c\u305f\u30b5\u30f3\u30d7\u30eb\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u3001Kafka \u304b\u3089\u30c7\u30fc\u30bf\u3092\u6d88\u8cbb\u3057\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u3082\u306e\u3067\u3059\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\r\n<span class=\"hljs-keyword\">import<\/span> java.io.FileWriter;\r\n<span class=\"hljs-keyword\">import<\/span> java.io.IOException;\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_\">KafkaToFile<\/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\">\/\/ Kafka\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\">\"test-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        <span class=\"hljs-comment\">\/\/ \u521b\u5efaKafka\u6d88\u8d39\u8005<\/span>\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\">\/\/ \u8ba2\u9605\u4e3b\u9898<\/span>\r\n        consumer.subscribe(Collections.singletonList(<span class=\"hljs-string\">\"test-topic\"<\/span>));\r\n\r\n        <span class=\"hljs-keyword\">try<\/span> {\r\n            <span class=\"hljs-comment\">\/\/ \u521b\u5efa\u6587\u4ef6\u5199\u5165\u5668<\/span>\r\n            <span class=\"hljs-type\">FileWriter<\/span> <span class=\"hljs-variable\">writer<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">FileWriter<\/span>(<span class=\"hljs-string\">\"output.txt\"<\/span>);\r\n\r\n            <span class=\"hljs-keyword\">while<\/span> (<span class=\"hljs-literal\">true<\/span>) {\r\n                <span class=\"hljs-comment\">\/\/ \u62c9\u53d6\u6570\u636e<\/span>\r\n                ConsumerRecords&lt;String, String&gt; records = consumer.poll(Duration.ofMillis(<span class=\"hljs-number\">100<\/span>));\r\n\r\n                <span class=\"hljs-keyword\">for<\/span> (ConsumerRecord&lt;String, String&gt; record : records) {\r\n                    <span class=\"hljs-comment\">\/\/ \u5c06\u6570\u636e\u5199\u5165\u6587\u4ef6<\/span>\r\n                    writer.write(record.value());\r\n                    writer.write(<span class=\"hljs-string\">\"\\n\"<\/span>);\r\n                }\r\n\r\n                <span class=\"hljs-comment\">\/\/ \u5237\u65b0\u7f13\u51b2\u533a<\/span>\r\n                writer.flush();\r\n            }\r\n        } <span class=\"hljs-keyword\">catch<\/span> (IOException e) {\r\n            e.printStackTrace();\r\n        } <span class=\"hljs-keyword\">finally<\/span> {\r\n            <span class=\"hljs-comment\">\/\/ \u5173\u95ed\u6587\u4ef6\u5199\u5165\u5668\u548c\u6d88\u8d39\u8005<\/span>\r\n            <span class=\"hljs-keyword\">try<\/span> {\r\n                writer.close();\r\n            } <span class=\"hljs-keyword\">catch<\/span> (IOException e) {\r\n                e.printStackTrace();\r\n            }\r\n            consumer.close();\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001\u307e\u305aKafka\u306e\u8a2d\u5b9a\u306b\u57fa\u3065\u3044\u3066Kafka\u30b3\u30f3\u30b7\u30e5\u30fc\u30de\u30fc\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002 \u6b21\u306b\u3001\u30b3\u30f3\u30b7\u30e5\u30fc\u30de\u30fc\u3059\u308b\u30c6\u30fc\u30de\uff08\u4f8b\u3048\u3070\u3001\u300ctest-topic\u300d\uff09\u3092\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d6\u3057\u307e\u3059\u3002 \u7d9a\u3044\u3066\u3001\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u305f\u3081\u306e\u30d5\u30a1\u30a4\u30eb\u30e9\u30a4\u30bf\u30fc\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002 \u305d\u306e\u5f8c\u3001\u7121\u9650\u30eb\u30fc\u30d7\u306b\u5165\u308a\u307e\u3059\u3002 \u5404\u30eb\u30fc\u30d7\u3067\u3001Kafka\u304b\u3089poll()\u30e1\u30bd\u30c3\u30c9\u3092\u4ecb\u3057\u3066\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3001\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002 \u6700\u5f8c\u306b\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u7d42\u4e86\u6642\u306b\u30d5\u30a1\u30a4\u30eb\u30e9\u30a4\u30bf\u30fc\u3068\u30b3\u30f3\u30b7\u30e5\u30fc\u30de\u30fc\u3092\u7d42\u4e86\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3059\u308b\u306b\u306f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b Kafka \u306e\u4f9d\u5b58\u95a2\u4fc2\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002Maven \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u6b21\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>\u4e0a\u8a18\u306e\u30b5\u30f3\u30d7\u30eb\u30d7\u30ed\u30b0\u30e9\u30e0\u3092Java\u30d5\u30a1\u30a4\u30eb\u3068\u3057\u3066\u4fdd\u5b58\u3057\u3001\u9069\u5207\u306a\u30d3\u30eb\u30c9\u30c4\u30fc\u30eb\uff08Maven\u306a\u3069\uff09\u3092\u4f7f\u7528\u3057\u3066\u30d3\u30eb\u30c9\u3057\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u5b9f\u884c\u3055\u308c\u308b\u3068\u3001Kafka\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u3001\u300coutput.txt\u300d\u3068\u3044\u3046\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kafka\u304b\u3089\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u51fa\u3059\u306b\u306f\u3001Kafka\u306eConsumer API\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u6d88\u8cbb\u3057\u3001\u30d5\u30a1\u30a4\u30eb\u3092\u66f8\u304d\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u4ee5\u4e0b\u306e Java \u3067\u8a18\u8ff0\u3055\u308c\u305f\u30b5\u30f3\u30d7\u30eb\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u3001Kafka \u304b\u3089 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-117330","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\u306e\u81a8\u5927\u306a\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u306b\u306f\u3069\u3046\u3059\u308c\u3070 - 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\/kafka\u306e\u81a8\u5927\u306a\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u306b\u306f\u3069\u3046\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"kafka\u306e\u81a8\u5927\u306a\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u306b\u306f\u3069\u3046\u3059\u308c\u3070\" \/>\n<meta property=\"og:description\" content=\"Kafka\u304b\u3089\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u51fa\u3059\u306b\u306f\u3001Kafka\u306eConsumer API\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u6d88\u8cbb\u3057\u3001\u30d5\u30a1\u30a4\u30eb\u3092\u66f8\u304d\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u4ee5\u4e0b\u306e Java \u3067\u8a18\u8ff0\u3055\u308c\u305f\u30b5\u30f3\u30d7\u30eb\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u3001Kafka \u304b\u3089 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/kafka\u306e\u81a8\u5927\u306a\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\u306b\u306f\u3069\u3046\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-23T00:59:31+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-05T11:25:50+00:00\" \/>\n<meta name=\"author\" content=\"\u590f\u6a39, \u98a8\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" 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