{"id":46987,"date":"2023-10-27T18:29:38","date_gmt":"2023-10-09T19:47:48","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8kafkadirectstream%e6%97%b6%ef%bc%8c%e4%bd%bf%e7%94%a8%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f%e7%9a%84%e6%96%b9%e6%b3%95%e5%92%8c%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9%e3%80%82\/"},"modified":"2024-01-15T12:15:17","modified_gmt":"2024-01-15T04:15:17","slug":"%e4%bd%bf%e7%94%a8kafkadirectstream%e6%97%b6%ef%bc%8c%e4%bd%bf%e7%94%a8%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f%e7%9a%84%e6%96%b9%e6%b3%95%e5%92%8c%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8kafkadirectstream%e6%97%b6%ef%bc%8c%e4%bd%bf%e7%94%a8%e6%ad%a3%e5%88%99%e8%a1%a8%e8%be%be%e5%bc%8f%e7%9a%84%e6%96%b9%e6%b3%95%e5%92%8c%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a1%b9%e3%80%82\/","title":{"rendered":"\u4f7f\u7528KafkaDirectStream\u65f6\uff0c\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u65b9\u6cd5\u548c\u6ce8\u610f\u4e8b\u9879"},"content":{"rendered":"<p>\u521b\u5efa KafkaDirectStream \u65f6\uff0c\u6211\u8ba4\u4e3a\u9700\u8981\u4f20\u9012\u8981\u6d88\u8d39\u7684\u4e3b\u9898\u4fe1\u606f\uff0c<br \/>\n\u53ef\u4ee5\u8bbe\u7f6e\u6b63\u5219\u8868\u8fbe\u5f0f\u4f5c\u4e3a\u4e3b\u9898\u540d\u79f0\u3002<\/p>\n<h1>\u4ee3\u7801\u793a\u4f8b\uff08KafkaDirectStream\uff09<\/h1>\n<p>\u5982\u679c\u5b58\u5728log20181201\u6216log20181202\u7b49\u4e3b\u9898\uff0c\u5219\u8bbe\u7f6e\u5982\u4e0b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">KafkaUtils<\/span><span class=\"o\">.<\/span><span class=\"py\">createDirectStream<\/span><span class=\"o\">(<\/span>\r\n      <span class=\"n\">sparkStreamingContext<\/span><span class=\"o\">,<\/span>\r\n      <span class=\"nc\">PreferConsistent<\/span><span class=\"o\">,<\/span>\r\n      <span class=\"nc\">SubscribePattern<\/span><span class=\"o\">[<\/span><span class=\"kt\">String<\/span>, <span class=\"kt\">String<\/span><span class=\"o\">](<\/span><span class=\"s\">\"log.+\"<\/span><span class=\"o\">.<\/span><span class=\"py\">r<\/span><span class=\"o\">.<\/span><span class=\"py\">pattern<\/span><span class=\"o\">,<\/span> <span class=\"n\">kafkaParams<\/span><span class=\"o\">))<\/span>\r\n<\/code><\/pre>\n<h1>\u8bf7\u6ce8\u610f<\/h1>\n<h2>\u5728\u9700\u8981\u987a\u5e8f\u5173\u952e\u7684\u5904\u7406\u4e2d\u65e0\u6cd5\u4f7f\u7528\u3002<\/h2>\n<p>\u5982\u679c\u5728\u4e0a\u8ff0\u4f8b\u5b50\u4e2d\u540c\u65f6\u5c06\u6570\u636e\u653e\u5165log20181201\u548clog20181202\uff0c\u5e76\u4e14\u9700\u8981\u5ffd\u7565\u4e3b\u9898\u6765\u6d88\u8d39\u6570\u636e\uff0c\u800c\u9700\u8981\u8003\u8651\u4e3b\u9898\u4e4b\u95f4\u7684\u987a\u5e8f\uff0c\u90a3\u4e48\u5c31\u4e0d\u80fd\u4f7f\u7528\u8fd9\u79cd\u65b9\u6cd5\u3002<\/p>\n<h2>\u5982\u679c\u5220\u9664\u4e3b\u9898\uff0c\u5219\u63d0\u4ea4\u504f\u79fb\u91cf\u65f6\u4f1a\u5d29\u6e83\u3002<\/h2>\n<p>\u5728KafkaDirectStream\u4e2d\uff0c\u6211\u4eec\u5c06\u5df2\u83b7\u53d6\u7684\u504f\u79fb\u4fe1\u606f\u63d0\u4ea4\u5230Kafka\uff0c\u4f46\u540c\u65f6\u4e5f\u63d0\u4ea4\u4e86\u6ca1\u6709\u4efb\u4f55\u6d3b\u52a8\u7684\u4e3b\u9898\u7684\u4fe1\u606f\u3002<br \/>\n\u56e0\u6b64\uff0c\u5982\u679c\u5220\u9664\u4e86\u672a\u4f7f\u7528\u7684\u65e7\u4e3b\u9898\uff0c\u5e76\u4e14\u5b83\u4eec\u662f\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u5339\u914d\u5bf9\u8c61\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u63d0\u4ea4\u5931\u8d25\u5e76\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\u3002<\/p>\n<p>\u5982\u679c\u9047\u5230\u50cf\u4e0a\u8ff0\u95ee\u9898\u8fd9\u6837\u7684\u60c5\u51b5\uff0c\u53ef\u4ee5\u5c06Kafka\u7684auto.commit\u53c2\u6570\u8bbe\u7f6e\u4e3afalse\uff0c\u7136\u540e\u660e\u786e\u5730\u63d0\u4ea4\u4ec5\u53d1\u751f\u4e86\u504f\u79fb\u91cf\u53d8\u5316\u7684\u5185\u5bb9\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">val<\/span> <span class=\"nv\">offsetRanges<\/span> <span class=\"k\">=<\/span> <span class=\"nv\">rdd<\/span><span class=\"o\">.<\/span><span class=\"py\">asInstanceOf<\/span><span class=\"o\">[<\/span><span class=\"kt\">HasOffsetRanges<\/span><span class=\"o\">].<\/span><span class=\"py\">offsetRanges<\/span>\r\n<span class=\"k\">val<\/span> <span class=\"nv\">commitOffsetRange<\/span> <span class=\"k\">=<\/span> <span class=\"nv\">offsetRanges<\/span><span class=\"o\">.<\/span><span class=\"py\">filterNot<\/span><span class=\"o\">(<\/span><span class=\"n\">x<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nv\">x<\/span><span class=\"o\">.<\/span><span class=\"py\">untilOffset<\/span> <span class=\"o\">==<\/span> <span class=\"nv\">x<\/span><span class=\"o\">.<\/span><span class=\"py\">fromOffset<\/span><span class=\"o\">)<\/span>\r\n<span class=\"nv\">kafkaDirectStream<\/span><span class=\"o\">.<\/span><span class=\"py\">asInstanceOf<\/span><span class=\"o\">[<\/span><span class=\"kt\">CanCommitOffsets<\/span><span class=\"o\">].<\/span><span class=\"py\">commitAsync<\/span><span class=\"o\">(<\/span><span class=\"n\">commitOffsetRange<\/span><span class=\"o\">)<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u521b\u5efa KafkaDirectStream \u65f6\uff0c\u6211\u8ba4\u4e3a\u9700\u8981\u4f20\u9012\u8981\u6d88\u8d39\u7684\u4e3b\u9898\u4fe1\u606f\uff0c \u53ef\u4ee5\u8bbe\u7f6e\u6b63\u5219\u8868\u8fbe\u5f0f\u4f5c\u4e3a\u4e3b\u9898\u540d\u79f0 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-46987","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>\u4f7f\u7528KafkaDirectStream\u65f6\uff0c\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u65b9\u6cd5\u548c\u6ce8\u610f\u4e8b\u9879 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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