{"id":41909,"date":"2024-12-01T12:38:02","date_gmt":"2024-12-01T04:38:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/41909\/"},"modified":"2024-12-01T12:38:02","modified_gmt":"2024-12-01T04:38:02","slug":"google-dataflow-runner-%e6%94%af%e6%8c%81-statefull-dofn-%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/41909\/","title":{"rendered":"google dataflow runner \u652f\u6301 Statefull doFn \u5417\uff1f"},"content":{"rendered":"<p><b><\/b> <\/p>\n<p>\u5f53\u524d\u4f4d\u7f6e\uff1a <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span>  <span>&gt;<\/span> <span>google dataflow runner \u652f\u6301 Statefull doFn \u5417\uff1f<\/span><\/p>\n<h1>google dataflow runner \u652f\u6301 Statefull doFn \u5417\uff1f<\/h1>\n<p><span>\u6765\u6e90\uff1astackoverflow<\/span><br \/>\n<span>2024-04-21 21:24:35<\/span><br \/>\n<span><i><\/i>0\u6d4f\u89c8<\/span><br \/>\n<span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300agoogle dataflow runner \u652f\u6301 Statefull doFn \u5417\uff1f\u300b<\/span>\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\uff0c\u6216\u8005\u662f\u5bf9<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">Golang<\/span>\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01<\/p>\n<p> \u95ee\u9898\u5185\u5bb9<br \/>\n <\/p>\n<p>\u6211\u65e0\u6cd5\u4f7f\u6279\u5904\u7406 fn \u5728 Dataflow \u4e0a\u5de5\u4f5c\u3002\u6211\u5728 Go \u4e2d\u4f7f\u7528\u4e86\u793a\u4f8b\u4e2d\u7684\u4e00\u4e2a\uff1ahttps:\/\/beam.apache.org\/documentation\/programming-guide\/#state-timers-examples<\/p>\n<p>dofn \u63a5\u6536\u5143\u7d20\u5e76\u89e6\u53d1 OnTimer \u4e00\u6b21\uff0c\u7136\u540e\u4e00\u5207\u90fd\u5361\u4f4f\u4e86\uff08\u6211\u53ef\u4ee5\u901a\u8fc7\u65e5\u5fd7\u770b\u5230\u5b83\uff09\u3002<\/p>\n<p>\u6211\u5904\u4e8e\u6d41\u5a92\u4f53\u6a21\u5f0f\u3002\u6240\u4ee5\u6211\u7684\u7b2c\u4e00\u4e2a\u95ee\u9898\u662f Dataflow \u652f\u6301 Go \u4e2d\u7684\u8ba1\u65f6\u5668\u5417\uff1f\u5982\u679c\u662f\u7684\u8bdd\u6211\u505a\u9519\u4e86\u4ec0\u4e48\uff1f\u6211\u4ece\u5b57\u9762\u4e0a\u590d\u5236\u4e86\u8fd9\u4e2a\u4f8b\u5b50\u3002<\/p>\n<p> <\/p>\n<h2>\u6b63\u786e\u7b54\u6848<\/h2>\n<p> <\/p>\n<p>\u597d\u7684\uff0c\u5bf9\u4e8e\u5728 dataflow \u4e0a\u9047\u5230\u76f8\u540c\u95ee\u9898\u7684\u6bcf\u4e2a\u4eba\uff0c\u60a8\u5fc5\u987b\u6dfb\u52a0\u6b64\u884c\u4f5c\u4e3a ontimer() \u56de\u8c03\uff1a<\/p>\n<pre>fn.OutputState.ClearTag(tp, timer.Tag) \/\/ Clean up the fired timer tag. (Temporary workaround for a runner bug.)\n<\/pre>\n<p>\uff08\u6b64\u884c\u51fa\u73b0\u5728 github \u4e0a\u7684\u793a\u4f8b\u4e2d\uff0c\u4f46\u4e0d\u5728\u6587\u6863\u4e2d\uff09<\/p>\n<p>\u672c\u7bc7\u5173\u4e8e\u300agoogle dataflow runner \u652f\u6301 Statefull doFn \u5417\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8eGolang\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u524d\u4f4d\u7f6e\uff1a &gt; &gt; &gt; &gt; google dataflow runner \u652f\u6301 Statefull doFn \u5417\uff1f google dataflow runner \u652f\u6301 Statefull doFn \u5417\uff1f \u6765\u6e90\uff1astackoverflow 2024-04-21 21:24:35 0\u6d4f\u89c8 \u6536\u85cf \u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765\u300agoogle dataflow runner \u652f\u6301 Statefull doFn \u5417\uff1f\u300b\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60Golang\uff0c\u6216\u8005\u662f\u5bf9Golang\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01 \u95ee\u9898\u5185\u5bb9 \u6211\u65e0\u6cd5\u4f7f\u6279\u5904\u7406 fn \u5728 Dataflow \u4e0a\u5de5\u4f5c\u3002\u6211\u5728 Go \u4e2d\u4f7f\u7528\u4e86\u793a\u4f8b\u4e2d\u7684\u4e00\u4e2a\uff1ahttps:\/\/beam.apache.org\/documentation\/programming-guide\/#state-timers-examples dofn \u63a5\u6536\u5143\u7d20\u5e76\u89e6\u53d1 OnTimer \u4e00\u6b21\uff0c\u7136\u540e\u4e00\u5207\u90fd\u5361\u4f4f\u4e86\uff08\u6211\u53ef\u4ee5\u901a\u8fc7\u65e5\u5fd7\u770b\u5230\u5b83\uff09\u3002 \u6211\u5904\u4e8e\u6d41\u5a92\u4f53\u6a21\u5f0f\u3002\u6240\u4ee5\u6211\u7684\u7b2c\u4e00\u4e2a\u95ee\u9898\u662f Dataflow \u652f\u6301 Go \u4e2d\u7684\u8ba1\u65f6\u5668\u5417\uff1f\u5982\u679c\u662f\u7684\u8bdd\u6211\u505a\u9519\u4e86\u4ec0\u4e48\uff1f\u6211\u4ece\u5b57\u9762\u4e0a\u590d\u5236\u4e86\u8fd9\u4e2a\u4f8b\u5b50\u3002 \u6b63\u786e\u7b54\u6848 \u597d\u7684\uff0c\u5bf9\u4e8e\u5728 dataflow \u4e0a\u9047\u5230\u76f8\u540c\u95ee\u9898\u7684\u6bcf\u4e2a\u4eba\uff0c\u60a8\u5fc5\u987b\u6dfb\u52a0\u6b64\u884c\u4f5c\u4e3a ontimer() \u56de\u8c03\uff1a fn.OutputState.ClearTag(tp, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-41909","post","type-post","status-publish","format-standard","hentry","category-docker"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/41909","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=41909"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/41909\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=41909"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=41909"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=41909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}