{"id":21583,"date":"2024-01-02T11:53:21","date_gmt":"2024-01-02T11:53:21","guid":{"rendered":"https:\/\/server.hk\/blog\/21583\/"},"modified":"2024-11-14T10:30:21","modified_gmt":"2024-11-14T02:30:21","slug":"mongodb-glossary-change-stream","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21583\/","title":{"rendered":"MongoDB \u8a5e\u5f59\u8868 &#8211; \u8b8a\u66f4\u6d41"},"content":{"rendered":"<h1 id=\"mongodb-glossary-change-stream-miZRKbJWPy\">MongoDB \u8a5e\u5f59\u8868 &#8211; \u8b8a\u66f4\u6d41<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7684\u4e16\u754c\u4e2d\uff0cMongoDB \u56e0\u5176\u9748\u6d3b\u6027\u3001\u53ef\u64f4\u5c55\u6027\u548c\u5f37\u5927\u7684\u529f\u80fd\u800c\u7372\u5f97\u4e86\u986f\u8457\u7684\u666e\u53ca\u3002\u5176\u4e2d\u4e00\u9805\u4f7f MongoDB \u812b\u7a4e\u800c\u51fa\u7684\u529f\u80fd\u662f\u5176\u8b8a\u66f4\u6d41\uff08Change Stream\uff09\u529f\u80fd\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e\u4ec0\u9ebc\u662f\u8b8a\u66f4\u6d41\u3001\u5b83\u5011\u662f\u5982\u4f55\u904b\u4f5c\u7684\uff0c\u4ee5\u53ca\u5b83\u5011\u5728 MongoDB \u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"understanding-change-streams-miZRKbJWPy\">\u7406\u89e3\u8b8a\u66f4\u6d41<\/h2>\n<p>MongoDB \u4e2d\u7684\u8b8a\u66f4\u6d41\u5141\u8a31\u958b\u767c\u8005\u8ffd\u8e64\u6578\u64da\u5eab\u96c6\u5408\u4e2d\u767c\u751f\u7684\u5be6\u6642\u8b8a\u66f4\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u7a2e\u76e3\u63a7\u548c\u97ff\u61c9\u6578\u64da\u4fee\u6539\u3001\u63d2\u5165\u3001\u522a\u9664\u548c\u66f4\u65b0\u7684\u65b9\u6cd5\u3002\u901a\u904e\u8a02\u95b1\u8b8a\u66f4\u6d41\uff0c\u61c9\u7528\u7a0b\u5e8f\u53ef\u4ee5\u63a5\u6536\u6301\u7e8c\u7684\u8b8a\u66f4\u4e8b\u4ef6\u6d41\uff0c\u4f7f\u5176\u80fd\u5920\u6839\u64da\u8b8a\u66f4\u7acb\u5373\u63a1\u53d6\u884c\u52d5\u3002<\/p>\n<h2 id=\"how-change-streams-work-miZRKbJWPy\">\u8b8a\u66f4\u6d41\u7684\u904b\u4f5c\u65b9\u5f0f<\/h2>\n<p>\u8b8a\u66f4\u6d41\u57fa\u65bc <code>watch()<\/code> \u65b9\u6cd5\u7684\u6982\u5ff5\uff0c\u8a72\u65b9\u6cd5\u7528\u65bc\u5728\u96c6\u5408\u4e0a\u5275\u5efa\u8b8a\u66f4\u6d41\u3002\u7576\u8b8a\u66f4\u6d41\u88ab\u5275\u5efa\u6642\uff0c\u5b83\u958b\u59cb\u76e3\u807d\u6307\u5b9a\u96c6\u5408\u7684\u4efb\u4f55\u8b8a\u66f4\u3002MongoDB \u7684\u8907\u88fd\u6a5f\u5236\u5728\u555f\u7528\u8b8a\u66f4\u6d41\u65b9\u9762\u8d77\u8457\u95dc\u9375\u4f5c\u7528\u3002\u96a8\u8457\u8b8a\u66f4\u7684\u767c\u751f\uff0c\u5b83\u5011\u6703\u88ab\u6355\u7372\u5230 oplog\uff08\u64cd\u4f5c\u65e5\u8a8c\uff09\u4e2d\uff0c\u9019\u662f\u4e00\u500b\u7279\u6b8a\u7684\u96c6\u5408\uff0c\u7528\u65bc\u7dad\u8b77\u6240\u6709\u5beb\u5165\u64cd\u4f5c\u7684\u6b77\u53f2\u8a18\u9304\u3002<\/p>\n<p>\u7576\u8b8a\u66f4\u6d41\u8655\u65bc\u6d3b\u52d5\u72c0\u614b\u6642\uff0c\u5b83\u6703\u4e0d\u65b7\u8f2a\u8a62 oplog \u4ee5\u7372\u53d6\u65b0\u7684\u8b8a\u66f4\u3002\u4e00\u65e6\u6aa2\u6e2c\u5230\u8b8a\u66f4\uff0c\u8a72\u8b8a\u66f4\u5c07\u4f5c\u70ba\u4e8b\u4ef6\u767c\u9001\u7d66\u8a02\u95b1\u8a72\u8b8a\u66f4\u6d41\u7684\u61c9\u7528\u7a0b\u5e8f\u3002\u7136\u5f8c\uff0c\u61c9\u7528\u7a0b\u5e8f\u53ef\u4ee5\u8655\u7406\u8a72\u4e8b\u4ef6\u4e26\u6839\u64da\u8b8a\u66f4\u57f7\u884c\u5fc5\u8981\u7684\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"use-cases-for-change-streams-miZRKbJWPy\">\u8b8a\u66f4\u6d41\u7684\u4f7f\u7528\u6848\u4f8b<\/h2>\n<p>\u8b8a\u66f4\u6d41\u63d0\u4f9b\u4e86\u5ee3\u6cdb\u7684\u4f7f\u7528\u6848\u4f8b\uff0c\u4e26\u4e14\u5728\u5404\u7a2e\u5834\u666f\u4e2d\u90fd\u80fd\u5e36\u4f86\u597d\u8655\u3002\u4e00\u4e9b\u5e38\u898b\u7684\u4f7f\u7528\u6848\u4f8b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u5be6\u6642\u901a\u77e5\uff1a<\/strong>\u8b8a\u66f4\u6d41\u4f7f\u61c9\u7528\u7a0b\u5e8f\u80fd\u5920\u5728\u6578\u64da\u5eab\u4e2d\u767c\u751f\u7279\u5b9a\u8b8a\u66f4\u6642\uff0c\u5411\u7528\u6236\u767c\u9001\u5be6\u6642\u901a\u77e5\u3002\u4f8b\u5982\uff0c\u6d88\u606f\u61c9\u7528\u7a0b\u5e8f\u53ef\u4ee5\u4f7f\u7528\u8b8a\u66f4\u6d41\u4f86\u901a\u77e5\u7528\u6236\u6709\u65b0\u6d88\u606f\u6216\u5c0d\u8a71\u7684\u66f4\u65b0\u3002<\/li>\n<li><strong>\u6578\u64da\u540c\u6b65\uff1a<\/strong>\u8b8a\u66f4\u6d41\u53ef\u7528\u65bc\u4fdd\u6301\u591a\u500b\u6578\u64da\u5eab\u6216\u96c6\u5408\u4e4b\u9593\u7684\u540c\u6b65\u3002\u7576\u4e00\u500b\u6578\u64da\u5eab\u4e2d\u767c\u751f\u8b8a\u66f4\u6642\uff0c\u8b8a\u66f4\u6d41\u53ef\u4ee5\u5c07\u8a72\u8b8a\u66f4\u50b3\u64ad\u5230\u5176\u4ed6\u6578\u64da\u5eab\uff0c\u78ba\u4fdd\u4e0d\u540c\u7cfb\u7d71\u4e4b\u9593\u7684\u6578\u64da\u4e00\u81f4\u6027\u3002<\/li>\n<li><strong>\u65e5\u8a8c\u548c\u5be9\u8a08\uff1a<\/strong>\u901a\u904e\u6355\u7372\u548c\u8655\u7406\u8b8a\u66f4\u4e8b\u4ef6\uff0c\u8b8a\u66f4\u6d41\u53ef\u7528\u65bc\u65e5\u8a8c\u548c\u5be9\u8a08\u76ee\u7684\u3002\u5b83\u5011\u63d0\u4f9b\u4e86\u4e00\u7a2e\u8ddf\u8e2a\u548c\u8a18\u9304\u6578\u64da\u5eab\u4e2d\u6bcf\u500b\u4fee\u6539\u7684\u65b9\u6cd5\uff0c\u4fbf\u65bc\u5206\u6790\u548c\u6545\u969c\u6392\u9664\u3002<\/li>\n<\/ul>\n<h2 id=\"conclusion-miZRKbJWPy\">\u7d50\u8ad6<\/h2>\n<p>MongoDB \u4e2d\u7684\u8b8a\u66f4\u6d41\u63d0\u4f9b\u4e86\u4e00\u7a2e\u5f37\u5927\u7684\u6a5f\u5236\uff0c\u7528\u65bc\u8ffd\u8e64\u548c\u97ff\u61c9\u6578\u64da\u5eab\u96c6\u5408\u4e2d\u7684\u5be6\u6642\u8b8a\u66f4\u3002\u901a\u904e\u5229\u7528\u8b8a\u66f4\u6d41\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u69cb\u5efa\u80fd\u5920\u5c0d\u6578\u64da\u4fee\u6539\u4f5c\u51fa\u97ff\u61c9\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u5be6\u73fe\u5be6\u6642\u901a\u77e5\u3001\u6578\u64da\u540c\u6b65\u548c\u9ad8\u6548\u7684\u65e5\u8a8c\u8a18\u9304\u3002\u5982\u679c\u60a8\u60f3\u4e86\u89e3\u66f4\u591a\u6709\u95dc MongoDB \u53ca\u5176\u529f\u80fd\u7684\u4fe1\u606f\uff0c\u8acb\u8003\u616e\u67e5\u770b <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u9019\u662f\u4e00\u5bb6\u9818\u5148\u7684 VPS \u4e3b\u6a5f\u516c\u53f8\uff0c\u63d0\u4f9b\u53ef\u9760\u4e14\u53ef\u64f4\u5c55\u7684 MongoDB \u4e3b\u6a5f\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MongoDB \u8a5e\u5f59\u8868 &#038;#82&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-21583","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21583","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=21583"}],"version-history":[{"count":2,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21583\/revisions"}],"predecessor-version":[{"id":23860,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21583\/revisions\/23860"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21583"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21583"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}