{"id":14551,"date":"2023-12-04T15:51:20","date_gmt":"2023-12-04T07:51:20","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=14551"},"modified":"2023-12-12T15:35:18","modified_gmt":"2023-12-12T07:35:18","slug":"kafka-zhong-xiao-fei-zhe-ru-he-xiao-fei-shu-ju","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/kafka-zhong-xiao-fei-zhe-ru-he-xiao-fei-shu-ju\/","title":{"rendered":"Kafka\u4e2d\u6d88\u8d39\u8005\u5982\u4f55\u6d88\u8d39\u6570\u636e\uff1f"},"content":{"rendered":"<p>\u5728 Kafka \u4e2d\uff0c\u6d88\u8d39\u8005\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u6765\u6d88\u8d39\u6570\u636e\uff1a<\/p>\n<ol>\n<li>\n<strong>\u8ba2\u9605\u4e3b\u9898\uff1a<\/strong> \u6d88\u8d39\u8005\u9996\u5148\u9700\u8981\u8ba2\u9605\u4e00\u4e2a\u6216\u591a\u4e2a\u4e3b\u9898\u3002\u901a\u8fc7\u8c03\u7528 <code>subscribe<\/code> \u65b9\u6cd5\uff0c\u6d88\u8d39\u8005\u53ef\u4ee5\u6307\u5b9a\u5b83\u5e0c\u671b\u4ece\u54ea\u4e9b\u4e3b\u9898\u4e2d\u63a5\u6536\u6d88\u606f\u3002<\/p>\n<pre><code class=\"language-java\">consumer.subscribe(Arrays.asList(&quot;topic1&quot;, &quot;topic2&quot;));\n<\/code><\/pre>\n<p>\u6216\u8005\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6765\u8ba2\u9605\u5339\u914d\u7684\u4e3b\u9898\uff1a<\/p>\n<pre><code class=\"language-java\">consumer.subscribe(Pattern.compile(&quot;topic.*&quot;));\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>\u8f6e\u8be2\u62c9\u53d6\u6d88\u606f\uff1a<\/strong> \u6d88\u8d39\u8005\u901a\u8fc7\u8f6e\u8be2\uff08polling\uff09\u7684\u65b9\u5f0f\u4ece Kafka \u670d\u52a1\u5668\u62c9\u53d6\u6d88\u606f\u3002\u6d88\u8d39\u8005\u8c03\u7528 <code>poll<\/code> \u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u4f1a\u4ece\u8ba2\u9605\u7684\u4e3b\u9898\u4e2d\u62c9\u53d6\u4e00\u6279\u6d88\u606f\u3002\u6d88\u8d39\u8005\u53ef\u4ee5\u8bbe\u7f6e\u4e00\u4e2a\u8d85\u65f6\u65f6\u95f4\uff0c\u6307\u5b9a\u5728\u6ca1\u6709\u6d88\u606f\u53ef\u7528\u65f6\u7b49\u5f85\u7684\u6700\u5927\u65f6\u95f4\u3002<\/p>\n<pre><code class=\"language-java\">ConsumerRecords&lt;String, String&gt; records = consumer.poll(Duration.ofMillis(100));\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>\u5904\u7406\u6d88\u606f\uff1a<\/strong> \u62c9\u53d6\u5230\u7684\u6d88\u606f\u5b58\u50a8\u5728 <code>ConsumerRecords<\/code> \u5bf9\u8c61\u4e2d\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u4e00\u7ec4\u8bb0\u5f55\u3002\u6d88\u8d39\u8005\u904d\u5386\u8fd9\u4e9b\u8bb0\u5f55\uff0c\u7136\u540e\u5904\u7406\u6bcf\u6761\u6d88\u606f\u3002<\/p>\n<pre><code class=\"language-java\">for (ConsumerRecord&lt;String, String&gt; record : records) {\n    \/\/ \u5904\u7406\u6d88\u606f\u903b\u8f91\n    System.out.printf(&quot;Consumed record with key %s and value %s%n&quot;, record.key(), record.value());\n}\n<\/code><\/pre>\n<p>\u5728\u5904\u7406\u6d88\u606f\u65f6\uff0c\u53ef\u4ee5\u8fdb\u884c\u4e00\u7cfb\u5217\u7684\u4e1a\u52a1\u903b\u8f91\uff0c\u4f8b\u5982\u6570\u636e\u8f6c\u6362\u3001\u5b58\u50a8\u3001\u5206\u6790\u7b49\u64cd\u4f5c\u3002\n<\/li>\n<li>\n<strong>\u63d0\u4ea4\u504f\u79fb\uff08Offset\uff09\uff1a<\/strong> \u6d88\u8d39\u8005\u8d1f\u8d23\u7ef4\u62a4\u6bcf\u4e2a\u5206\u533a\u7684\u504f\u79fb\uff0c\u8868\u793a\u4e0b\u4e00\u6761\u5f85\u6d88\u8d39\u7684\u6d88\u606f\u4f4d\u7f6e\u3002\u6d88\u8d39\u8005\u5728\u5904\u7406\u5b8c\u4e00\u6279\u6d88\u606f\u540e\uff0c\u53ef\u4ee5\u9009\u62e9\u624b\u52a8\u63d0\u4ea4\u504f\u79fb\uff0c\u4e5f\u53ef\u4ee5\u8ba9 Kafka \u81ea\u52a8\u63d0\u4ea4\u504f\u79fb\u3002<\/p>\n<ul>\n<li>\n<strong>\u624b\u52a8\u63d0\u4ea4\uff1a<\/strong> \u6d88\u8d39\u8005\u53ef\u4ee5\u8c03\u7528 <code>commitSync<\/code> \u6216 <code>commitAsync<\/code> \u65b9\u6cd5\u624b\u52a8\u63d0\u4ea4\u504f\u79fb\u3002<\/p>\n<pre><code class=\"language-java\">consumer.commitSync();\n<\/code><\/pre>\n<\/li>\n<li>\n<strong>\u81ea\u52a8\u63d0\u4ea4\uff1a<\/strong> \u6d88\u8d39\u8005\u53ef\u4ee5\u8bbe\u7f6e <code>enable.auto.commit<\/code> \u914d\u7f6e\u4e3a <code>true<\/code>\uff0c\u7531 Kafka \u81ea\u52a8\u5468\u671f\u6027\u5730\u63d0\u4ea4\u504f\u79fb\u3002<\/p>\n<pre><code class=\"language-java\">properties.put(&quot;enable.auto.commit&quot;, &quot;true&quot;);\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u6d88\u8d39\u8005\u901a\u8fc7\u8fd9\u4e9b\u6b65\u9aa4\u6765\u83b7\u53d6\u548c\u5904\u7406 Kafka \u4e3b\u9898\u4e2d\u7684\u6d88\u606f\u3002\u6ce8\u610f\uff0c\u6d88\u8d39\u8005\u5728\u5904\u7406\u6d88\u606f\u65f6\u8981\u8003\u8651\u5f02\u5e38\u5904\u7406\u548c\u4fdd\u8bc1\u6d88\u606f\u5904\u7406\u7684\u5e42\u7b49\u6027\uff0c\u4ee5\u786e\u4fdd\u7cfb\u7edf\u7684\u53ef\u9760\u6027\u3002\u6b64\u5916\uff0c\u6d88\u8d39\u8005\u8fd8\u53ef\u4ee5\u901a\u8fc7\u914d\u7f6e\u9879\u6765\u63a7\u5236\u5404\u79cd\u884c\u4e3a\uff0c\u4f8b\u5982\u504f\u79fb\u7684\u63d0\u4ea4\u65b9\u5f0f\u3001\u6d88\u606f\u62c9\u53d6\u7684\u9891\u7387\u7b49\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Kafka \u4e2d\uff0c\u6d88\u8d39\u8005\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u6765\u6d88\u8d39\u6570\u636e\uff1a \u8ba2\u9605\u4e3b\u9898\uff1a \u6d88\u8d39\u8005\u9996\u5148\u9700\u8981\u8ba2\u9605\u4e00\u4e2a\u6216\u591a\u4e2a\u4e3b\u9898\u3002\u901a\u8fc7\u8c03\u7528 s [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[122],"tags":[],"class_list":["post-14551","post","type-post","status-publish","format-standard","hentry","category-kafka"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14551","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=14551"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14551\/revisions"}],"predecessor-version":[{"id":47965,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/14551\/revisions\/47965"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=14551"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=14551"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=14551"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}