{"id":50517,"date":"2023-02-19T17:01:32","date_gmt":"2024-02-20T12:51:54","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8akka%e5%ae%9e%e7%8e%b0cqrs%e6%a8%a1%e5%bc%8f\/"},"modified":"2024-04-29T15:19:44","modified_gmt":"2024-04-29T07:19:44","slug":"%e4%bd%bf%e7%94%a8akka%e5%ae%9e%e7%8e%b0cqrs%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8akka%e5%ae%9e%e7%8e%b0cqrs%e6%a8%a1%e5%bc%8f\/","title":{"rendered":"\u4f7f\u7528Akka\u5b9e\u73b0CQRS\u6a21\u5f0f"},"content":{"rendered":"<h1>\u76ee\u5f55<\/h1>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5173\u4e8e\u6587\u7ae0<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u7b80\u5355\u7684\u81ea\u6211\u4ecb\u7ecd<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u590d\u4e60\u54cd\u5e94\u5f0f\u58f0\u660e<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5b9e\u73b0\u548c\u89e3\u91ca<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u603b\u7ed3<\/ol>\n<h1>\u5173\u4e8e\u8fd9\u7bc7\u6587\u7ae0<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5f53\u8a18\u4e8b\u306f\u30ea\u30a2\u30af\u30c6\u30a3\u30d6\u5ba3\u8a00\u30fbCQRS\u306e\u6982\u8981\u3092\u8aac\u660e\u5f8c\u3001Scala\/Akka(typed)\u3067\u306e\u5b9f\u88c5\u3092\u4f8b\u306b\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5bfe\u8c61\u306e\u8aad\u8005\u3068\u3057\u3066Scala\u30d7\u30ed\u30b0\u30e9\u30de\u30fbAkka\u3067\u5168\u4f53\u50cf\u304c\u63b4\u3081\u306a\u3044\u4eba\u3092\u60f3\u5b9a\u3057\u3066\u304a\u308a\u307e\u3059\u3002\uff08\u5bfe\u8c61\u5916\u306e\u65b9\u306b\u3082\u7406\u89e3\u51fa\u6765\u308b\u3088\u3046\u7cbe\u4e00\u676f\u52aa\u529b\u3057\u3066\u306f\u3044\u307e\u3059\u3002\uff09<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3053\u306e\u8a18\u4e8b\u3067\u306fDDD\u306b\u95a2\u3059\u308b\u8aac\u660e\u306f\u884c\u3044\u307e\u305b\u3093\u3002DDD\u3068CQRS\u30d1\u30bf\u30fc\u30f3\u306e\u95a2\u4fc2\u306b\u3064\u3044\u3066\u306f\u7533\u3057\u8a33\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u5225\u306e\u65b9\u306e\u8a18\u4e8b\u3092\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u8abf\u67fb\u3057\u305f\u5185\u5bb9\u3092\u6271\u3044\u307e\u3059\u304c\u89e3\u8aac\u306b\u4e0d\u5099\u304c\u3042\u308b\u5834\u5408\u306f\u5f53\u8a18\u4e8b\u306b\u30b3\u30e1\u30f3\u30c8\u3001\u3082\u3057\u304f\u306f@AerosmithBz\u307e\u3067\u3054\u9023\u7d61\u304f\u3060\u3055\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>\u30ea\u30a2\u30af\u30c6\u30a3\u30d6\u5ba3\u8a00\u306e\u304a\u3055\u3089\u3044\u306b\u3064\u3044\u3066\u306f\u30ea\u30a2\u30af\u30c6\u30a3\u30d6\u5ba3\u8a00\u306e\u8981\u7d04\u3068\u306a\u308a\u307e\u3059\u306e\u3067\u3001\u4e00\u8aad\u3055\u308c\u305f\u4e8b\u306e\u3042\u308b\u65b9\u306f\u98db\u3070\u3057\u3066\u3044\u305f\u3060\u3044\u3066\u69cb\u3044\u307e\u305b\u3093\u3002<\/p>\n<div>\u5173\u4e8eAkka\u7684\u8bb8\u53ef\u8bc1\u66f4\u6539<br \/>\n\u4eceVersion 2.7.x\u5f00\u59cb\uff0cAkka\u7684\u8bb8\u53ef\u8bc1\u5c06\u66f4\u6539\u4e3aBSL1.1\u3002<br \/>\n\u5728\u5546\u4e1a\u4f7f\u7528\u4e4b\u524d\uff0c\u8bf7\u81ea\u884c\u8c03\u67e5\u786e\u8ba4\u3002<\/div>\n<h1>\u6211\u53eb\u7b80\u5355\u81ea\u6211\u4ecb\u7ecd<\/h1>\n<p>\u521d\u6b21\u89c1\u9762\u7684\u670b\u53cb\uff0c\u60a8\u597d\u3002<br \/>\n\u6211\u662f\u963f\u65af\u8fbe\uff08HN\uff09\uff0c\u4e00\u5e74\u7ea7\u7684\u5185\u90e8\/SES\u5de5\u7a0b\u5e08\uff0c\u8d1f\u8d23WEB\u7cfb\u7edf\u5f00\u53d1\u3002<br \/>\n\u76ee\u524d\u5728\u9879\u76ee\u4e2d\u4e3b\u8981\u4f7f\u7528Python\u548cPHP\uff0c\u4f46\u6ca1\u6709\u63a5\u89e6\u5230Scala\uff0c\u6bcf\u5929\u90fd\u628a\u6211\u7684\u60b2\u4f24\u5531\u6210\u6b4c\u3002<br \/>\n\u6211\u5728Scala\u65b9\u9762\u6709\u5927\u7ea6\u4e00\u5e74\u534a\u7684\u7ecf\u9a8c\uff0c\u540c\u65f6\u4e5f\u6301\u7eed\u4e86\u5927\u7ea6\u4e00\u5e74\u65f6\u95f4\u5728\u5f00\u53d1\uff08\u5b66\u4e60\uff09Akka\u3002<br \/>\n\u6211\u7684GitHub\u94fe\u63a5\u5728\u8fd9\u91cc\u3002<\/p>\n<h1>\u54cd\u5e94\u5f0f\u58f0\u660e\u7684\u590d\u4e60<\/h1>\n<p>\u6211\u8ba4\u4e3a\u5728\u5b66\u4e60CQRS\u65f6\uff0c\u6700\u597d\u5148\u638c\u63e1\u6839\u672c\u6982\u5ff5\u548c\u601d\u60f3\u2014\u2014\u53cd\u5e94\u5f0f\u5ba3\u8a00\uff0c\u6240\u4ee5\u6211\u5c06\u7b80\u5355\u5730\u89e3\u91ca\u4e00\u4e0b\u53cd\u5e94\u5f0f\u5ba3\u8a00\u3002<\/p>\n<h2>\u7528\u6237\u5bf9\u7cfb\u7edf\u7684\u671f\u671b\u662f\u4ec0\u4e48\uff1f<\/h2>\n<p>\u5728 \u53cd\u5e94\u5f0f\u5ba3\u8a00 \u672c\u6587\u7684\u5f15\u8a00\u90e8\u5206\u4e2d\u5199\u9053\u5982\u4e0b\u3002<\/p>\n<blockquote><p>\u53ea\u662f\u51e0\u5e74\u524d\uff0c\u5de8\u5927\u7684\u5e94\u7528\u7a0b\u5e8f\u7531\u51e0\u5341\u4e2a\u670d\u52a1\u5668\u7ec4\u6210\uff0c\u80fd\u591f\u5bb9\u5fcd\u6570\u79d2\u7684\u54cd\u5e94\u65f6\u95f4\u548c\u6570\u5c0f\u65f6\u7684\u79bb\u7ebf\u7ef4\u62a4\uff0c\u6570\u636e\u91cf\u7ea6\u4e3a\u51e0\u5343\u5146\u5b57\u8282\u3002\u5982\u4eca\u7684\u5e94\u7528\u7a0b\u5e8f\u88ab\u90e8\u7f72\u5728\u5404\u79cd\u8bbe\u5907\u4e0a\uff0c\u4ece\u79fb\u52a8\u8bbe\u5907\u5230\u6570\u5343\u4e2a\u591a\u6838\u5904\u7406\u5668\u7684\u4e91\u57fa\u7840\u96c6\u7fa4\u3002\u7528\u6237\u671f\u671b\u6beb\u79d2\u7ea7\u7684\u54cd\u5e94\u65f6\u95f4\u548c100%\u7684\u8fd0\u884c\u65f6\u95f4\u3002\u6570\u636e\u91cf\u4ee5\u62cd\u5b57\u8282\u8ba1\u7b97\u3002\u6628\u5929\u7684\u8f6f\u4ef6\u67b6\u6784\u5b8c\u5168\u65e0\u6cd5\u6ee1\u8db3\u4eca\u5929\u7684\u9700\u6c42\u3002<\/p><\/blockquote>\n<p>\u7b80\u800c\u8a00\u4e4b\uff0c\u76ee\u524d\u7684\u7cfb\u7edf\u4e0e\u8fc7\u53bb\u76f8\u6bd4\u53d8\u5f97\u5e9e\u5927\uff0c\u7528\u6237\u7684\u8981\u6c42\u53d8\u5f97\u66f4\u9ad8\uff0c\u6570\u636e\u91cf\u4ee5\u62cd\u5b57\u8282\u4e3a\u5355\u4f4d\u8fdb\u884c\u5904\u7406\u3002\u73b0\u4ee3\u5316\u7cfb\u7edf\u96be\u4ee5\u8ddf\u4e0a\u53d8\u5316\uff0c\u5e76\u672a\u6ee1\u8db3\u7528\u6237\u7684\u671f\u671b\u884c\u4e3a\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u8981\u8ba8\u8bba\u5982\u4f55\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<div>\n<div class=\"post-table\">\u3000\u30b5\u30fc\u30d0\u30fc\u6570\u671f\u5f85\u3055\u308c\u308b\u5fdc\u7b54\u6642\u9593\u30c7\u30fc\u30bf\u91cf<strong>\u6614<\/strong>\u5c11\u9045\u6570\u30ae\u30ac<strong>\u4eca<\/strong>\u591a\u65e9\u30da\u30bf\u30d0\u30a4\u30c8\u5358\u4f4d<\/div>\n<\/div>\n<h2>\u6784\u6210\u53cd\u5e94\u6027\u7cfb\u7edf\u7684\u56db\u4e2a\u8981\u7d20<\/h2>\n<blockquote><p>\u6211\u4eec\u6240\u8ffd\u6c42\u7684\u662f\u4e00\u4e2a\u5177\u5907\u54cd\u5e94\u80fd\u529b\u3001\u5bb9\u9519\u6027\u3001\u5f39\u6027\u548c\u6d88\u606f\u9a71\u52a8\u7684\u7cfb\u7edf\u3002\u6211\u4eec\u79f0\u4e4b\u4e3a\u53cd\u5e94\u5f0f\u7cfb\u7edf\uff08Reactive Systems\uff09\u3002\u53cd\u5e94\u5f0f\u58f0\u660e\u8bf7\u53c2\u89c1https:\/\/www.reactivemanifesto.org\/ja<\/p><\/blockquote>\n<p>\u6211\u4eec\u5728\u672c\u6587\u4e2d\u63d0\u51fa\u4e86\u4e00\u79cd\u88ab\u79f0\u4e3a\u53cd\u5e94\u5f0f\u7cfb\u7edf\u7684\u67b6\u6784\uff0c\u65e8\u5728\u89e3\u51b3\u524d\u8ff0\u95ee\u9898\uff0c\u5e76\u4e14\u5c06\u5176\u6784\u6210\u8981\u7d20\u5b9a\u4e49\u4e3a\u5373\u65f6\u54cd\u5e94\u6027\u3001\u5bb9\u9519\u6027\u3001\u5f39\u6027\u548c\u6d88\u606f\u9a71\u52a8\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5373\u65f6\u54cd\u5e94\u6027<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u7cfb\u7edf\u5e94\u5c3d\u53ef\u80fd\u5feb\u901f\u5730\u505a\u51fa\u54cd\u5e94\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5bb9\u9519\u6027<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u7cfb\u7edf\u5373\u4f7f\u9762\u4e34\u6545\u969c\u4e5f\u80fd\u4fdd\u6301\u5373\u65f6\u54cd\u5e94\u6027\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5f39\u6027<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u7cfb\u7edf\u80fd\u5728\u5de5\u4f5c\u8d1f\u8f7d\u53d8\u5316\u7684\u60c5\u51b5\u4e0b\u4fdd\u6301\u5373\u65f6\u54cd\u5e94\u6027\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u6d88\u606f\u9a71\u52a8<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u53cd\u5e94\u5f0f\u7cfb\u7edf\u901a\u8fc7\u5f02\u6b65\u6d88\u606f\u4f20\u9012\u6765\u5efa\u7acb\u7ec4\u4ef6\u4e4b\u95f4\u7684\u754c\u9650\u3002<\/ol>\n<p>\u5e76\u63d0\u4f9b\u89e3\u91ca\uff0c\u7b80\u800c\u8a00\u4e4b\uff0c\u53cd\u5e94\u5f0f\u7cfb\u7edf\u7684\u6982\u89c8\u662f\u5229\u7528\u5f02\u6b65\u6d88\u606f\u4f20\u9012\u6784\u5efa\u4e00\u4e2a\u7a33\u5b9a\u3001\u6613\u4e8e\u6269\u5c55\u4e14\u54cd\u5e94\u8fc5\u901f\u7684\u7cfb\u7edf\uff0c\u4ee5\u89e3\u51b3\u95ee\u9898\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d9211913a08637a6e1764\/19-0.png\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2022-09-20 22.04.07.png\" \/><\/div>\n<h3>\u4e3a\u4ec0\u4e48\u9009\u62e9\u6d88\u606f\u9a71\u52a8\u4f5c\u4e3a\u624b\u6bb5\uff1f<\/h3>\n<p>\u9019\u7bc7\u6587\u7ae0\u4e2d\u63cf\u8ff0\u4e86\u4ee5\u4e0b\u5167\u5bb9\u3002<\/p>\n<blockquote><p>\u6d88\u606f\u9a71\u52a8\uff08Message Driven\uff09\uff1a\u54cd\u5e94\u5f0f\u7cfb\u7edf\u901a\u8fc7\u5f02\u6b65\u6d88\u606f\u4f20\u9012\u6765\u5efa\u7acb\u7ec4\u4ef6\u4e4b\u95f4\u7684\u8fb9\u754c\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u5b83\u4fdd\u8bc1\u4e86\u677e\u8026\u5408\u6027\u3001\u9694\u79bb\u6027\u548c\u4f4d\u7f6e\u900f\u660e\u6027\uff0c\u5e76\u63d0\u4f9b\u4e86\u5c06\u9519\u8bef\u59d4\u6258\u4e3a\u6d88\u606f\u7684\u624b\u6bb5\u3002\u663e\u5f0f\u7684\u6d88\u606f\u4f20\u9012\u53ef\u4ee5\u5b9e\u73b0\u8d1f\u8f7d\u7ba1\u7406\u548c\u5f39\u6027\u3002\u6b64\u5916\uff0c\u7cfb\u7edf\u5185\u521b\u5efa\u548c\u76d1\u63a7\u6d88\u606f\u961f\u5217\uff0c\u5e76\u5728\u9700\u8981\u65f6\u5e94\u7528\u80cc\u538b\uff0c\u4ee5\u5b9e\u73b0\u6d41\u91cf\u63a7\u5236\u3002\u901a\u8fc7\u4f7f\u7528\u4f4d\u7f6e\u900f\u660e\u7684\u6d88\u606f\u4f20\u9012\u4f5c\u4e3a\u901a\u4fe1\u624b\u6bb5\uff0c\u53ef\u4ee5\u5728\u901a\u4fe1\u8de8\u8d8a\u96c6\u7fa4\u6216\u5728\u5355\u4e2a\u4e3b\u673a\u5185\u7ba1\u7406\u76f8\u540c\u7684\u6545\u969c\u914d\u7f6e\u548c\u8bed\u4e49\u3002\u975e\u963b\u585e\u901a\u4fe1\u4f7f\u5f97\u63a5\u6536\u65b9\u53ea\u5728\u6fc0\u6d3b\u65f6\u624d\u6d88\u8017\u8d44\u6e90\uff0c\u4ece\u800c\u6291\u5236\u4e86\u7cfb\u7edf\u7684\u5f00\u9500\u3002Reactive\u58f0\u660e [\u5177\u4f53\u94fe\u63a5]\uff08https:\/\/www.reactivemanifesto.org\/ja\uff09<\/p>\n<p>*\u4f4d\u7f6e\u900f\u660e\u6027\u662f\u6307\u8fd0\u884c\u65f6\u5b9e\u4f8b\u548c\u5176\u5f15\u7528\u7684\u5206\u79bb\u6982\u5ff5\u3002<\/p><\/blockquote>\n<p>\u6362\u53e5\u8bdd\u8bf4\uff0c\u6211\u4eec\u7684\u76ee\u6807\u662f\u901a\u8fc7\u4f7f\u7528\u57fa\u4e8e\u6d88\u606f\u9a71\u52a8\u7684\u5f02\u6b65\u6d88\u606f\u4f20\u9012\u6765\u6ee1\u8db3\u4ee5\u4e0b\u56db\u4e2a\u8981\u6c42\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u786e\u4fdd\u677e\u6563\u8026\u5408\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u901a\u8fc7\u4f7f\u7528\u660e\u786e\u7684\u6d88\u606f\u4f20\u9012\uff0c\u53ef\u4ee5\u8f7b\u677e\u7ba1\u7406\u6bcf\u4e2a\u7ec4\u4ef6\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u901a\u8fc7\u4f4d\u7f6e\u900f\u660e\u6027\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5f39\u6027\u7684\u8d44\u6e90\u7ba1\u7406\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u4f7f\u7528\u4f4d\u7f6e\u900f\u660e\u7684\u6d88\u606f\u4f20\u9012\u53ef\u4ee5\u5728\u7cfb\u7edf\u4e2d\u4ea7\u751f\u5171\u540c\u9879\uff0c\u4ece\u800c\u964d\u4f4e\u6210\u672c\u3002<\/ol>\n<p>\u5f3a\u70c8\u63a8\u8350\u60a8\u8fdb\u884c\u5b9e\u65bd\uff0c\u4ee5\u4fbf\u66f4\u597d\u5730\u7406\u89e3\u6574\u4f53\u60c5\u51b5\uff0c\u56e0\u4e3a\u4ec5\u4ec5\u901a\u8fc7\u63cf\u8ff0\uff0c\u53ef\u80fd\u5f88\u96be\u60f3\u8c61\u51fa\u4f4d\u7f6e\u7684\u900f\u660e\u5ea6\u3002<\/p>\n<h1>\u5b9e\u65bd\u548c\u89e3\u91ca\u3002<\/h1>\n<p>\u7531\u4e8e\u4e0a\u9762\u7684\u6587\u672c\u91cf\u8d85\u8fc7\u4e86\u9884\u671f\u76845\u500d\uff0c\u6240\u4ee5\u8bf7\u5feb\u901f\u6d4f\u89c8\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u6709\u5173CQRS<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u6709\u5173Akka<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u6709\u5173\u793a\u4f8b\u9879\u76ee\u7684\u6982\u8ff0<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u6e90\u7801\u548c\u89e3\u91ca<\/ol>\n<h2>\u5173\u4e8eCQRS<\/h2>\n<p>CQRS\uff08Command Query Responsibility Segregation: \u30b3\u30de\u30f3\u30c9\u30af\u30a8\u30ea\u8cac\u52d9\u5206\u96e2\uff09\u662f\u6307\u5c06\u547d\u4ee4\uff08\u5199\u5165\uff09\u548c\u67e5\u8be2\uff08\u8bfb\u53d6\uff09\u8fdb\u884c\u5206\u79bb\uff0c\u4ee5\u786e\u4fdd\u53ef\u6269\u5c55\u6027\u7684\u4e00\u79cd\u601d\u8def\u3002\u5728\u6267\u884c\u5199\u5165\u64cd\u4f5c\u65f6\uff0c\u901a\u5e38\u4f1a\u4e0e\u4e8b\u4ef6\u6eaf\u6e90\u6a21\u5f0f\uff08Event Sourcing\uff09\u4e00\u8d77\u5b9e\u73b0\uff0c\u4ee5\u4e8b\u4ef6\u7684\u5f62\u5f0f\u5c06\u6570\u636e\u5b58\u50a8\u5230\u6570\u636e\u5e93\u4e2d\u3002<\/p>\n<p>\u5177\u9ad4\u7684\u6d41\u7a0b\u5982\u4e0b\uff0c\u5728\u672c\u6587\u4e2d\u8a18\u8f09\uff1a<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u547d\u4ee4\u4fa7\u4ee5\u4e8b\u4ef6\u7684\u5f62\u5f0f\u5c06\u7528\u6237\u7684\u8f93\u5165\u5199\u5165\u7528\u4e8e\u5199\u5165\u7684NoSQL\u6570\u636e\u5e93\uff08Cassandra\uff09\u4e2d\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u6295\u5f71\u5c06\u6839\u636e\u4e8b\u4ef6\u5c06\u6570\u636e\u6620\u5c04\u5230\u7528\u4e8e\u8bfb\u53d6\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff08Aurora\uff09\u4e2d\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u8bfb\u53d6API\u7528\u4e8e\u83b7\u53d6\u6570\u636e\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u6e90\u7801\u548c\u89e3\u91ca<\/ol>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d9211913a08637a6e1764\/33-0.png\" alt=\"akka-cqrs-counter.png\" \/><\/div>\n<h2>\u5173\u4e8eAkka<\/h2>\n<p>\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u89e3\u91ca\u5982\u4f55\u5b9e\u65bd\u793a\u4f8b\u9879\u76ee\uff0c\u8fdb\u800c\u7406\u89e3\u5e94\u8be5\u4e86\u89e3\u7684ClusterScharding\uff0c\u7279\u522b\u662f\u5728\u4f7f\u7528Akka\u65f6\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d9211913a08637a6e1764\/36-0.png\" alt=\"cluster_sharding.png\" \/><\/div>\n<h2>\u6837\u672c\u9879\u76ee\u7684\u6982\u8ff0<\/h2>\n<p>\u4e3a\u4e86\u7406\u89e3CQRS\u7684\u6574\u4f53\u60c5\u51b5\uff0c\u8fd9\u6b21\u7684\u91cd\u70b9\u662f\u5e94\u7528\u7a0b\u5e8f\u7684\u5b9e\u73b0\uff0c\u6211\u4eec\u5c06\u91c7\u7528\u4e00\u4e2a\u7b80\u5355\u7684\u8ba1\u6570\u5668\u5e94\u7528\u7a0b\u5e8f\u3002<br \/>\n\u6b64\u5916\uff0c\u5728\u8fd9\u91cc\u6211\u4eec\u5c06\u89e3\u91caWriteAPI\u548cProjection, \u5e76\u4e14\u5173\u4e8eReadAPI\uff0c\u53ea\u8981\u80fd\u5c06\u67e5\u8be2\u6295\u9012\u5230\u6570\u636e\u5e93\u4e2d\uff0c\u672c\u6b21\u89e3\u91ca\u5c31\u4e0d\u518d\u6307\u5b9a\u7279\u5b9a\u5185\u5bb9\u3002<\/p>\n<h3>\u5199API\u56fe<\/h3>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d9211913a08637a6e1764\/40-0.png\" alt=\"qiita_akka.png\" \/><\/div>\n<h3>\u8bf7\u7f16\u5199API\u6d41\u7a0b\u56fe\u3002<\/h3>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d9211913a08637a6e1764\/42-0.png\" alt=\"qiita_flow.png\" \/><\/div>\n<h3>\u6295\u5f71\u56fe<\/h3>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d9211913a08637a6e1764\/44-0.png\" alt=\"qiita_projectoin.png\" \/><\/div>\n<h2>\u63d0\u4f9b\u539f\u59cb\u8d44\u6599\u548c\u89e3\u91ca\u6027\u8bf4\u660e<\/h2>\n<p>\u8bf7\u53c2\u9605GitHub\u4e0a\u7684\u5b8c\u6574\u6e90\u4ee3\u7801\u3002<\/p>\n<h3>\u57df\u540d<\/h3>\n<pre class=\"post-pre\"><code><span class=\"k\">case<\/span> <span class=\"k\">class<\/span> <span class=\"nc\">Counter<\/span><span class=\"o\">(<\/span><span class=\"n\">number<\/span><span class=\"k\">:<\/span> <span class=\"kt\">Int<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n  <span class=\"c1\">\/\/ \u30ab\u30a6\u30f3\u30c8\u30a2\u30c3\u30d7\u3057\u305f\u5024\u3092\u6301\u3064\u30ab\u30a6\u30f3\u30bf\u30fc\u3092\u8fd4\u5374\u3059\u308b\u3002<\/span>\r\n  <span class=\"k\">def<\/span> <span class=\"nf\">countUp<\/span><span class=\"o\">(<\/span><span class=\"n\">number<\/span><span class=\"k\">:<\/span> <span class=\"kt\">Int<\/span><span class=\"o\">)<\/span><span class=\"k\">:<\/span> <span class=\"kt\">Counter<\/span> <span class=\"o\">=<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"py\">copy<\/span><span class=\"o\">(<\/span><span class=\"n\">number<\/span> <span class=\"k\">=<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"py\">number<\/span> <span class=\"o\">+<\/span> <span class=\"n\">number<\/span><span class=\"o\">)<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u30c9\u30e1\u30a4\u30f3\u306f\u5f8c\u3005Actor\u306b\u30b9\u30c6\u30fc\u30c8\u3068\u3057\u3066\u72b6\u614b\u3092\u4fdd\u5b58\u3057\u66f4\u65b0\u51fa\u6765\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u306e\u3067\u30b3\u30d4\u30fc\u3092\u8fd4\u3059\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/ul>\n<h3>\u7efc\u5408\u534f\u8bae<\/h3>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ Serialize\u7528\u306b\u5b9a\u7fa9<\/span>\r\n<span class=\"k\">trait<\/span> <span class=\"nc\">CborSerializable<\/span>\r\n\r\n<span class=\"k\">object<\/span> <span class=\"nc\">CounterAggregateProtocol<\/span> <span class=\"o\">{<\/span>\r\n\r\n  <span class=\"k\">sealed<\/span> <span class=\"k\">trait<\/span> <span class=\"nc\">CounterCommand<\/span> <span class=\"k\">extends<\/span> <span class=\"nc\">CborSerializable<\/span>\r\n\r\n  <span class=\"c1\">\/\/ ActorRef[_]::ask\u7528\u306e\u30ea\u30d7\u30e9\u30a4\u5148\u306eActorRef\u3092\u30b3\u30de\u30f3\u30c9\u306b\u683c\u7d0d\u3059\u308b\u3002<\/span>\r\n  <span class=\"k\">final<\/span> <span class=\"k\">case<\/span> <span class=\"k\">class<\/span> <span class=\"nc\">CountUp<\/span><span class=\"o\">(<\/span><span class=\"n\">id<\/span><span class=\"k\">:<\/span> <span class=\"kt\">String<\/span><span class=\"o\">,<\/span> <span class=\"n\">n<\/span><span class=\"k\">:<\/span> <span class=\"kt\">Int<\/span><span class=\"o\">)(<\/span><span class=\"k\">val<\/span> <span class=\"nv\">replyTo<\/span><span class=\"k\">:<\/span> <span class=\"kt\">ActorRef<\/span><span class=\"o\">[<\/span><span class=\"kt\">CountUpReply<\/span><span class=\"o\">])<\/span> <span class=\"k\">extends<\/span> <span class=\"nc\">CounterCommand<\/span>\r\n\r\n  <span class=\"k\">sealed<\/span> <span class=\"k\">trait<\/span> <span class=\"nc\">CountUpReply<\/span> <span class=\"k\">extends<\/span> <span class=\"nc\">CborSerializable<\/span>\r\n\r\n  <span class=\"k\">final<\/span> <span class=\"k\">case<\/span> <span class=\"k\">class<\/span> <span class=\"nc\">CountUpSucceededReply<\/span><span class=\"o\">(<\/span><span class=\"n\">counter<\/span><span class=\"k\">:<\/span> <span class=\"kt\">Counter<\/span><span class=\"o\">)<\/span> <span class=\"k\">extends<\/span> <span class=\"nc\">CountUpReply<\/span>\r\n\r\n  <span class=\"k\">final<\/span> <span class=\"k\">case<\/span> <span class=\"k\">class<\/span> <span class=\"nc\">CountUpFailedReply<\/span><span class=\"o\">(<\/span><span class=\"n\">e<\/span><span class=\"k\">:<\/span> <span class=\"kt\">Exception<\/span><span class=\"o\">)<\/span> <span class=\"k\">extends<\/span> <span class=\"nc\">CountUpReply<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Aggregate\u3067\u9001\u53d7\u4fe1\u3059\u308b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u5b9a\u7fa9\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>CborSerializable\u306b\u3064\u3044\u3066\u306f\u516c\u5f0fDocument\u3092\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>\u6c47\u96c6<\/h3>\n<pre class=\"post-pre\"><code><span class=\"k\">object<\/span> <span class=\"nc\">CounterAggregate<\/span> <span class=\"o\">{<\/span>\r\n\r\n  <span class=\"c1\">\/\/ \u2460<\/span>\r\n  <span class=\"k\">private<\/span> <span class=\"k\">def<\/span> <span class=\"nf\">commandHandler<\/span><span class=\"o\">(<\/span><span class=\"n\">ctx<\/span><span class=\"k\">:<\/span> <span class=\"kt\">ActorContext<\/span><span class=\"o\">[<\/span><span class=\"kt\">CounterAggregateProtocol.CounterCommand<\/span><span class=\"o\">])<\/span><span class=\"k\">:<\/span>\r\n  <span class=\"o\">(<\/span><span class=\"kt\">Counter<\/span><span class=\"o\">,<\/span> <span class=\"kt\">CounterAggregateProtocol.CounterCommand<\/span><span class=\"o\">)<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nc\">Effect<\/span><span class=\"o\">[<\/span><span class=\"kt\">CounterEvent<\/span>, <span class=\"kt\">Counter<\/span><span class=\"o\">]<\/span> <span class=\"k\">=<\/span>\r\n    <span class=\"o\">(<\/span><span class=\"k\">_<\/span><span class=\"o\">,<\/span> <span class=\"n\">command<\/span><span class=\"o\">)<\/span> <span class=\"k\">=&gt;<\/span>\r\n      <span class=\"n\">command<\/span> <span class=\"k\">match<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">case<\/span> <span class=\"n\">cmd<\/span><span class=\"nd\">@CounterAggregateProtocol<\/span><span class=\"o\">.<\/span><span class=\"py\">CountUp<\/span><span class=\"o\">(<\/span><span class=\"n\">id<\/span><span class=\"o\">,<\/span> <span class=\"n\">n<\/span><span class=\"o\">)<\/span> <span class=\"k\">=&gt;<\/span>\r\n          <span class=\"nv\">Effect<\/span><span class=\"o\">.<\/span><span class=\"py\">persist<\/span><span class=\"o\">(<\/span><span class=\"nv\">CounterEvent<\/span><span class=\"o\">.<\/span><span class=\"py\">CountUpped<\/span><span class=\"o\">(<\/span><span class=\"n\">id<\/span><span class=\"o\">,<\/span> <span class=\"n\">n<\/span><span class=\"o\">)).<\/span><span class=\"py\">thenReply<\/span><span class=\"o\">(<\/span><span class=\"nv\">cmd<\/span><span class=\"o\">.<\/span><span class=\"py\">replyTo<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span> <span class=\"n\">state<\/span> <span class=\"k\">=&gt;<\/span>\r\n            <span class=\"nv\">CounterAggregateProtocol<\/span><span class=\"o\">.<\/span><span class=\"py\">CountUpSucceededReply<\/span><span class=\"o\">(<\/span><span class=\"n\">state<\/span><span class=\"o\">)<\/span>\r\n          <span class=\"o\">}<\/span>\r\n      <span class=\"o\">}<\/span>\r\n\r\n  <span class=\"c1\">\/\/ \u2461<\/span>\r\n  <span class=\"k\">private<\/span> <span class=\"k\">def<\/span> <span class=\"nf\">eventHandler<\/span><span class=\"k\">:<\/span> <span class=\"o\">(<\/span><span class=\"kt\">Counter<\/span><span class=\"o\">,<\/span> <span class=\"kt\">CounterEvent<\/span><span class=\"o\">)<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nc\">Counter<\/span> <span class=\"k\">=<\/span>\r\n    <span class=\"o\">(<\/span><span class=\"n\">state<\/span><span class=\"o\">,<\/span> <span class=\"n\">event<\/span><span class=\"o\">)<\/span> <span class=\"k\">=&gt;<\/span>\r\n      <span class=\"n\">event<\/span> <span class=\"k\">match<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">case<\/span> <span class=\"nv\">CounterEvent<\/span><span class=\"o\">.<\/span><span class=\"py\">CountUpped<\/span><span class=\"o\">(<\/span><span class=\"k\">_<\/span><span class=\"o\">,<\/span> <span class=\"n\">n<\/span><span class=\"o\">)<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nv\">state<\/span><span class=\"o\">.<\/span><span class=\"py\">countUp<\/span><span class=\"o\">(<\/span><span class=\"n\">n<\/span><span class=\"o\">)<\/span>\r\n      <span class=\"o\">}<\/span>\r\n\r\n  <span class=\"k\">def<\/span> <span class=\"nf\">apply<\/span><span class=\"o\">(<\/span><span class=\"n\">persistenceId<\/span><span class=\"k\">:<\/span> <span class=\"kt\">PersistenceId<\/span><span class=\"o\">)<\/span><span class=\"k\">:<\/span> <span class=\"kt\">Behavior<\/span><span class=\"o\">[<\/span><span class=\"kt\">CounterAggregateProtocol.CounterCommand<\/span><span class=\"o\">]<\/span> <span class=\"k\">=<\/span>\r\n    <span class=\"nv\">Behaviors<\/span><span class=\"o\">.<\/span><span class=\"py\">setup<\/span> <span class=\"o\">{<\/span> <span class=\"n\">ctx<\/span> <span class=\"k\">=&gt;<\/span>\r\n      <span class=\"nc\">EventSourcedBehavior<\/span><span class=\"o\">(<\/span>\r\n        <span class=\"c1\">\/\/ \u2462<\/span>\r\n        <span class=\"n\">persistenceId<\/span> <span class=\"k\">=<\/span> <span class=\"n\">persistenceId<\/span><span class=\"o\">,<\/span>\r\n        <span class=\"c1\">\/\/ \u2463<\/span>\r\n        <span class=\"n\">emptyState<\/span> <span class=\"k\">=<\/span> <span class=\"nc\">Counter<\/span><span class=\"o\">(),<\/span>\r\n        <span class=\"c1\">\/\/ \u30b3\u30de\u30f3\u30c9\u30cf\u30f3\u30c9\u30e9\u3068\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\u3092\u5b9a\u7fa9\u3059\u308b\u3002<\/span>\r\n        <span class=\"n\">commandHandler<\/span> <span class=\"k\">=<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"py\">commandHandler<\/span><span class=\"o\">(<\/span><span class=\"n\">ctx<\/span><span class=\"o\">),<\/span>\r\n        <span class=\"n\">eventHandler<\/span> <span class=\"k\">=<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"py\">eventHandler<\/span><span class=\"o\">)<\/span>\r\n        <span class=\"c1\">\/\/ \u2464<\/span>\r\n        <span class=\"o\">.<\/span><span class=\"py\">withTagger<\/span><span class=\"o\">(<\/span><span class=\"k\">_<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nc\">Set<\/span><span class=\"o\">(<\/span><span class=\"nv\">CounterTags<\/span><span class=\"o\">.<\/span><span class=\"py\">Single<\/span><span class=\"o\">))<\/span>\r\n        <span class=\"c1\">\/\/ \u2465<\/span>\r\n        <span class=\"o\">.<\/span><span class=\"py\">withRetention<\/span><span class=\"o\">(<\/span><span class=\"nv\">RetentionCriteria<\/span><span class=\"o\">.<\/span><span class=\"py\">snapshotEvery<\/span><span class=\"o\">(<\/span><span class=\"n\">numberOfEvents<\/span> <span class=\"k\">=<\/span> <span class=\"mi\">10<\/span><span class=\"o\">,<\/span> <span class=\"n\">keepNSnapshots<\/span> <span class=\"k\">=<\/span> <span class=\"mi\">3<\/span><span class=\"o\">))<\/span>\r\n        <span class=\"c1\">\/\/ \u2466<\/span>\r\n        <span class=\"o\">.<\/span><span class=\"py\">onPersistFailure<\/span><span class=\"o\">(<\/span><span class=\"nv\">SupervisorStrategy<\/span><span class=\"o\">.<\/span><span class=\"py\">restartWithBackoff<\/span><span class=\"o\">(<\/span><span class=\"mf\">200.<\/span><span class=\"n\">millis<\/span><span class=\"o\">,<\/span> <span class=\"mf\">5.<\/span><span class=\"n\">seconds<\/span><span class=\"o\">,<\/span> <span class=\"mf\">0.1<\/span><span class=\"o\">))<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u2460\u30b3\u30de\u30f3\u30c9\u53d7\u4fe1\u6642\u306e\u51e6\u7406\u3092\u5b9a\u7fa9\u3059\u308b\u3002Effect::persist\u3067\u30a4\u30d9\u30f3\u30c8\u3092\u6c38\u7d9a\u5316\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u2461\u30a4\u30d9\u30f3\u30c8\u53d7\u4fe1\u6642\u306e\u51e6\u7406\u3092\u5b9a\u7fa9\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u2462persitenceId&#8230;\u6c38\u7d9a\u5316\u3059\u308b\u969b\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u3002\u53c2\u7167\u3059\u308b\u969b\u306f\u3053\u306e\u5024\u3092\u5143\u306b\u30a2\u30af\u30bf\u30fc\u3092\u53d6\u5f97\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u2463\u30a2\u30af\u30bf\u30fc\u958b\u59cb\u306e\u30b9\u30c6\u30fc\u30c8\u306e\u5024\u3002\u7a7a\u306e\u72b6\u614b\u3092\u5b9a\u7fa9\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u2464\u30bf\u30b0\u306e\u5b9a\u7fa9\u3002\u672c\u756a\u3067\u306f\u5358\u4e00\u306e\u30bf\u30b0\u306e\u307f\u3067\u306e\u5b9f\u88c5\u306f\u304a\u3084\u3081\u304f\u3060\u3055\u3044\u3002\u30bf\u30b0\u306b\u3064\u3044\u3066\u306f\u3053\u3061\u3089\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>\u2465\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3092\u4f5c\u6210\u3059\u308b\u983b\u5ea6\u3092\u5b9a\u7fa9\u3002<br \/>\n\u2466SupervisorStrategy&#8230;\u969c\u5bb3\u6642\u306e\u632f\u308b\u821e\u3044\u3092\u5b9a\u7fa9\u3002<\/p>\n<p>&nbsp;<\/p>\n<h3>\u6295\u5f71\u5904\u7406\u7a0b\u5e8f<\/h3>\n<p>\u5173\u4e8e\u6295\u5f71\uff0c\u53ef\u4ee5\u5728WriteApi\u5185\u8fdb\u884c\u5904\u7406\uff0c\u4f46\u662f\u8fd9\u6b21\u6211\u4eec\u5c06\u5176\u5212\u5206\u4e3a\u53e6\u4e00\u4e2a\u9879\u76ee\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">final<\/span> <span class=\"k\">class<\/span> <span class=\"nc\">CounterProjectionHandler<\/span><span class=\"o\">(<\/span><span class=\"n\">system<\/span><span class=\"k\">:<\/span> <span class=\"kt\">ActorSystem<\/span><span class=\"o\">[<\/span><span class=\"k\">_<\/span><span class=\"o\">])<\/span>\r\n  <span class=\"k\">extends<\/span> <span class=\"nc\">Handler<\/span><span class=\"o\">[<\/span><span class=\"kt\">EventEnvelope<\/span><span class=\"o\">[<\/span><span class=\"kt\">CounterEvent<\/span><span class=\"o\">]]<\/span> <span class=\"o\">{<\/span>\r\n\r\n  <span class=\"k\">private<\/span> <span class=\"k\">implicit<\/span> <span class=\"k\">val<\/span> <span class=\"nv\">ec<\/span><span class=\"k\">:<\/span> <span class=\"kt\">ExecutionContext<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">system<\/span><span class=\"o\">.<\/span><span class=\"py\">executionContext<\/span>\r\n\r\n  <span class=\"k\">override<\/span> <span class=\"k\">def<\/span> <span class=\"nf\">process<\/span><span class=\"o\">(<\/span><span class=\"n\">envelope<\/span><span class=\"k\">:<\/span> <span class=\"kt\">EventEnvelope<\/span><span class=\"o\">[<\/span><span class=\"kt\">CounterEvent<\/span><span class=\"o\">])<\/span><span class=\"k\">:<\/span> <span class=\"kt\">Future<\/span><span class=\"o\">[<\/span><span class=\"kt\">Done<\/span><span class=\"o\">]<\/span> <span class=\"k\">=<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"nv\">envelope<\/span><span class=\"o\">.<\/span><span class=\"py\">event<\/span> <span class=\"k\">match<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"k\">case<\/span> <span class=\"nv\">CounterEvent<\/span><span class=\"o\">.<\/span><span class=\"py\">CountUpped<\/span><span class=\"o\">(<\/span><span class=\"n\">id<\/span><span class=\"o\">,<\/span> <span class=\"n\">number<\/span><span class=\"o\">)<\/span> <span class=\"k\">=&gt;<\/span>\r\n        <span class=\"k\">val<\/span> <span class=\"nv\">row<\/span> <span class=\"k\">=<\/span> <span class=\"nc\">CounterRow<\/span><span class=\"o\">(<\/span><span class=\"n\">id<\/span><span class=\"o\">,<\/span> <span class=\"n\">number<\/span><span class=\"o\">)<\/span>\r\n        <span class=\"c1\">\/\/ \u8aad\u8fbc\u7528DB\u306b\u30a4\u30d9\u30f3\u30c8\u3092\u53cd\u6620\u3055\u305b\u3066\u3044\u308b\u3002<\/span>\r\n        <span class=\"nv\">CounterRepository<\/span><span class=\"o\">.<\/span><span class=\"py\">insert<\/span><span class=\"o\">(<\/span><span class=\"n\">row<\/span><span class=\"o\">).<\/span><span class=\"py\">map<\/span><span class=\"o\">(<\/span><span class=\"k\">_<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"nc\">Done<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"o\">}<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30a4\u30d9\u30f3\u30c8\u53d7\u4fe1\u901a\u77e5\u6642\u306e\u51e6\u7406\u3092\u5b9a\u7fa9\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u4e3b\u306b\u8aad\u8fbc\u7528DB\u306b\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3057\u305f\u308aKafka\u306a\u3069\u306b\u30c7\u30fc\u30bf\u3092\u6e21\u3059\u3002<\/ul>\n<h3>\u6295\u5f71<\/h3>\n<p>\u203b\u5173\u4e8eProjection\uff0c\u53ef\u4ee5\u5728WriteApi\u4e2d\u8fdb\u884c\u5904\u7406\uff0c\u4f46\u662f\u8fd9\u6b21\u6211\u4eec\u5df2\u7ecf\u5c06\u5176\u5206\u79bb\u5230\u53e6\u4e00\u4e2a\u9879\u76ee\u4e2d\u4e86\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">object<\/span> <span class=\"nc\">CounterProjection<\/span> <span class=\"k\">extends<\/span> <span class=\"nc\">App<\/span> <span class=\"o\">{<\/span>\r\n\r\n  <span class=\"k\">def<\/span> <span class=\"nf\">apply<\/span><span class=\"o\">()<\/span><span class=\"k\">:<\/span> <span class=\"kt\">Behavior<\/span><span class=\"o\">[<\/span><span class=\"kt\">String<\/span><span class=\"o\">]<\/span> <span class=\"k\">=<\/span> <span class=\"nv\">Behaviors<\/span><span class=\"o\">.<\/span><span class=\"py\">setup<\/span> <span class=\"o\">{<\/span> <span class=\"n\">context<\/span> <span class=\"k\">=&gt;<\/span>\r\n\r\n    <span class=\"k\">implicit<\/span> <span class=\"k\">val<\/span> <span class=\"nv\">system<\/span><span class=\"k\">:<\/span> <span class=\"kt\">ActorSystem<\/span><span class=\"o\">[<\/span><span class=\"k\">_<\/span><span class=\"o\">]<\/span> <span class=\"k\">=<\/span> <span class=\"nv\">context<\/span><span class=\"o\">.<\/span><span class=\"py\">system<\/span>\r\n    <span class=\"k\">implicit<\/span> <span class=\"k\">val<\/span> <span class=\"nv\">ec<\/span><span class=\"k\">:<\/span> <span class=\"kt\">ExecutionContextExecutor<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">system<\/span><span class=\"o\">.<\/span><span class=\"py\">executionContext<\/span>\r\n\r\n    <span class=\"k\">val<\/span> <span class=\"nv\">sourceProvider<\/span> <span class=\"k\">=<\/span>\r\n      <span class=\"c1\">\/\/ \u2460<\/span>\r\n      <span class=\"nc\">EventSourcedProvider<\/span>\r\n        <span class=\"o\">.<\/span><span class=\"py\">eventsByTag<\/span><span class=\"o\">[<\/span><span class=\"kt\">CounterEvent<\/span><span class=\"o\">](<\/span>\r\n          <span class=\"n\">system<\/span><span class=\"o\">,<\/span>\r\n          <span class=\"n\">readJournalPluginId<\/span> <span class=\"k\">=<\/span> <span class=\"nv\">CassandraReadJournal<\/span><span class=\"o\">.<\/span><span class=\"py\">Identifier<\/span><span class=\"o\">,<\/span>\r\n          <span class=\"n\">tag<\/span> <span class=\"k\">=<\/span> <span class=\"nv\">CounterTags<\/span><span class=\"o\">.<\/span><span class=\"py\">Single<\/span><span class=\"o\">)<\/span>\r\n\r\n    <span class=\"k\">val<\/span> <span class=\"nv\">projection<\/span> <span class=\"k\">=<\/span>\r\n      <span class=\"c1\">\/\/ \u2461<\/span>\r\n      <span class=\"nc\">CassandraProjection<\/span>\r\n        <span class=\"o\">.<\/span><span class=\"py\">atLeastOnce<\/span><span class=\"o\">(<\/span>\r\n          <span class=\"n\">projectionId<\/span> <span class=\"k\">=<\/span> <span class=\"nc\">ProjectionId<\/span><span class=\"o\">(<\/span><span class=\"s\">\"counters\"<\/span><span class=\"o\">,<\/span> <span class=\"nv\">CounterTags<\/span><span class=\"o\">.<\/span><span class=\"py\">Single<\/span><span class=\"o\">),<\/span>\r\n          <span class=\"n\">sourceProvider<\/span><span class=\"o\">,<\/span>\r\n          <span class=\"n\">handler<\/span> <span class=\"k\">=<\/span> <span class=\"o\">()<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">CounterProjectionHandler<\/span><span class=\"o\">(<\/span><span class=\"n\">system<\/span><span class=\"o\">))<\/span>\r\n        <span class=\"o\">.<\/span><span class=\"py\">withSaveOffset<\/span><span class=\"o\">(<\/span><span class=\"n\">afterEnvelopes<\/span> <span class=\"k\">=<\/span> <span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"n\">afterDuration<\/span> <span class=\"k\">=<\/span> <span class=\"mf\">500.<\/span><span class=\"n\">millis<\/span><span class=\"o\">)<\/span>\r\n\r\n    <span class=\"c1\">\/\/ \u2462<\/span>\r\n    <span class=\"nc\">ClusterSingleton<\/span><span class=\"o\">(<\/span><span class=\"n\">system<\/span><span class=\"o\">).<\/span><span class=\"py\">init<\/span><span class=\"o\">(<\/span>\r\n      <span class=\"nc\">SingletonActor<\/span><span class=\"o\">(<\/span>\r\n        <span class=\"nc\">ProjectionBehavior<\/span><span class=\"o\">(<\/span><span class=\"n\">projection<\/span><span class=\"o\">),<\/span>\r\n        <span class=\"nv\">projection<\/span><span class=\"o\">.<\/span><span class=\"py\">projectionId<\/span><span class=\"o\">.<\/span><span class=\"py\">id<\/span><span class=\"o\">)<\/span>\r\n        <span class=\"o\">.<\/span><span class=\"py\">withStopMessage<\/span><span class=\"o\">(<\/span><span class=\"nv\">ProjectionBehavior<\/span><span class=\"o\">.<\/span><span class=\"py\">Stop<\/span><span class=\"o\">))<\/span>\r\n\r\n    <span class=\"nv\">Behaviors<\/span><span class=\"o\">.<\/span><span class=\"py\">empty<\/span>\r\n  <span class=\"o\">}<\/span>\r\n\r\n  <span class=\"nc\">ActorSystem<\/span><span class=\"o\">(<\/span><span class=\"nc\">CounterProjection<\/span><span class=\"o\">(),<\/span> <span class=\"s\">\"akkaCqrsCounter_projection\"<\/span><span class=\"o\">)<\/span>\r\n  <span class=\"nv\">StdIn<\/span><span class=\"o\">.<\/span><span class=\"py\">readLine<\/span><span class=\"o\">()<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u2460\u30bf\u30b0\u3068ReadJounalPlugin\u3092\u5143\u306bSource\u3092\u53d6\u5f97\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u2461Projection\u3092\u8a2d\u5b9a\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u2462\u4eca\u56de\u306fClusterSingleton\u3092\u63a1\u7528\u3002<\/ul>\n<h1>\u603b\u7ed3<\/h1>\n<p>\u6700\u5f8c\u53ef\u80fd\u6709\u70b9\u5306\u5fd9\uff0c\u4f46\u6253\u7b97\u968f\u65f6\u66f4\u65b0\u6587\u7ae0\u3002\uff08\u56e0\u4e3a\u5230\u76ee\u524d\u4e3a\u6b62\u82b1\u4e86\u5927\u7ea66\u4e2a\u5c0f\u65f6\uff0c\u8bf7\u539f\u8c05\u3002\uff09<br \/>\n\u4f5c\u4e3a\u5230\u76ee\u524d\u4e3a\u6b62\u6240\u5b66\u7684\u611f\u53d7\uff0c\u8fd9\u4e5f\u6210\u4e3a\u4e86\u6211\u7f16\u5199\u8fd9\u7bc7\u6587\u7ae0\u7684\u80cc\u666f\u3002\u7136\u800c\uff0c\u5c31\u50cf\u6211\u8fd9\u6837\u5de5\u7a0b\u5e08\u7ecf\u9a8c\u6d45\u8584\u7684\u4eba\u6765\u8bf4\uff0c\u6709\u5173Akka\u7684\u8fd9\u4e00\u90e8\u5206\u6587\u7ae0\u76f8\u5bf9\u8f83\u5c11\uff0c\u5b66\u4e60\u76f8\u5f53\u56f0\u96be\u3002<br \/>\n\u771f\u5fc3\u611f\u8c22\u7ed9\u4e88\u6211\u5efa\u8bae\u7684\u5404\u4f4d\u670b\u53cb\u3002<br \/>\n\u6211\u5e0c\u671b\u8fd9\u7bc7\u6587\u7ae0\u53ef\u4ee5\u5f15\u5bfc\u6211\u8fc7\u53bb\u7684\u81ea\u5df1\u3002<br \/>\n\u4ee5\u4e0a\uff0c\u975e\u5e38\u611f\u8c22\u3002<\/p>\n<p>GitHub<br \/>\n&#8211; \u57fa\u4e8eGit\u7248\u672c\u63a7\u5236\u7cfb\u7edf\u7684\u4ee3\u7801\u6258\u7ba1\u5e73\u53f0<\/p>\n<p>Twitter<br \/>\n&#8211; \u4e00\u79cd\u793e\u4ea4\u5a92\u4f53\u5e73\u53f0\uff0c\u5141\u8bb8\u7528\u6237\u53d1\u9001\u548c\u9605\u8bfb\u77ed\u6587\u672c\u6d88\u606f<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u76ee\u5f55 \u5173\u4e8e\u6587\u7ae0 &nbsp; \u7b80\u5355\u7684\u81ea\u6211\u4ecb\u7ecd &nbsp; \u590d\u4e60\u54cd\u5e94\u5f0f\u58f0\u660e &nbsp; \u5b9e\u73b0\u548c\u89e3\u91ca &#038;nbs [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-50517","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\u7528Akka\u5b9e\u73b0CQRS\u6a21\u5f0f - 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\/zh\/blog\/\u4f7f\u7528akka\u5b9e\u73b0cqrs\u6a21\u5f0f\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4f7f\u7528Akka\u5b9e\u73b0CQRS\u6a21\u5f0f\" 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