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\/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042708824\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br 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Evans\u7684\u300a\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\u300b\u7b2c9\u7ae0\uff1a\u89c4\u683c\u662f\u4e00\u4e2a\u8c13\u8bcd\uff0c\u5c01\u88c5\u4e86\u4e1a\u52a1\u89c4\u5219\uff0c\u53ef\u4ee5\u660e\u786e\u8868\u8fbe\u4e00\u4e2a\u7279\u5b9a\u5b9e\u4f53\u662f\u5426\u6ee1\u8db3\u8be5\u89c4\u683c\u6807\u51c6\uff1b\u89c4\u5219\u662f\u503c\u5bf9\u8c61\uff0c\u53ef\u4ee5\u7ec4\u5408\u4f7f\u7528\uff0c\u5176\u7ec4\u5408\u5b9e\u73b0\u4e0eSQL\u7684\u62fc\u51d1\u975e\u5e38\u5951\u5408\uff0c\u4f7f\u5f97\u5176\u5341\u5206\u9002\u5408\u5e94\u7528\u5728\u4ed3\u50a8\uff1b\u89c4\u683c\u7684\u6982\u5ff5\u5f15\u5165\uff0c\u4f7f\u5f97\u6211\u4eec\u5bf9\u5b9e\u4f53\u591a\u79cd\u68c0\u7d22\u7684\u9700\u6c42\u8fc7\u7a0b\u505a\u5230\u4e86\u901a\u7528\u5316\uff1b\u597d\u7684\u89c4\u683c\u5b9e\u73b0\uff0c\u94fe\u5f0f API 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DomainRepository.getInstance().newEntityId() \u65b9\u6cd5\uff0c\u8fd4\u56de\u4e00\u4e2a\u7531\u6570\u636e\u5e93\u7ba1\u7406\u7684\u552f\u4e00ID\u3002\u4ed3\u50a8\u63d0\u4f9b\u5de5\u5382\u65b9\u6cd5\uff1a\u805a\u5408\u5b9e\u4f53\u7684\u521b\u5efa\uff0c\u4e0d\u4e00\u5b9a\u662f\u7531\u9886\u57df\u670d\u52a1\u5b8c\u6210\u7684\uff0c\u5982\u679c\u6211\u4eec\u7684\u805a\u5408\u5b9e\u4f53\u5177\u6709\u521b\u5efa\u6a21\u677f\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u5047\u8bbe\u4ed3\u50a8\u672c\u8eab\u5177\u6709\u5927\u91cf\u7684\u65b0\u5bf9\u8c61\u6c60\u5f85\u4f7f\u7528\u3002\u6240\u4ee5\u53ef\u4ee5\u8fd9\u6837\u521b\u5efa\u5b9e\u4f53\uff1aDomainRepository.getInstance().newXXEntity() 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\/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042708825\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u6709\u4eba\u6216\u8005\u4f1a\u89c9\u5f97\u6211\u5bf9\u8fd9\u4e2a\u4ed3\u50a8\u7684\u5efa\u6a21\u592a\u8f83\u771f\u4e86\uff0c\u56e0\u4e3a\u6211\u5b8c\u5168\u4ece\u95ee\u9898\u7a7a\u95f4\u89d2\u5ea6\u770b\u8fd9\u4e2a\u95ee\u9898\uff0c\u4f46\u6211\u63d0\u51fa\u8fd9\u4e2a\u7684\u76ee\u7684\uff0c\u53ea\u662f\u60f3\u4e3a\u540e\u9762\u7684\u5b9e\u8df5\u65b9\u6848\u63d0\u4f9b\u4e00\u4e2a\u4ee5\u95ee\u9898\u7a7a\u95f4\u4e3a\u4e3b\u7684\u53c2\u8003\u6807\u51c6\uff0c\u7a81\u51fa\u5728\u4ed3\u50a8\u9009\u62e9\u4e0d\u540c\u5b9e\u73b0\u7684\u65f6\u5019\u4e0d\u5f97\u4e0d\u5c48\u670d\u4e8e\u6280\u672f\u7684\u7279\u6027\u4ece\u800c\u4f7f\u5f97\u4ed3\u50a8\u7684\u7279\u6027\u4ea7\u751f\u7684\u5dee\u5f02\u3002\u6211\u4f1a\u5728\u6bcf\u4e2a\u5b9e\u73b0\u4e2d\u63d0\u51fa\u5982\u679c\u8981\u62b9\u5e73\u5dee\u5f02\u8981\u600e\u4e48\u505a\uff0c\u5e76\u7ed9\u51fa\u53ef\u4ee5\u5e94\u7528\u7684\u573a\u666f\uff0c\u8bfb\u8005\u7406\u89e3\u8fd9\u4e9b\u5dee\u5f02\u540e\u4f1a\u5bf9\u4ed3\u50a8\u6709\u66f4\u6df1\u7684\u4e86\u89e3\uff0c\u5176\u4e2d\u300a\u5b9e\u73b0\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\u300b\u4e2dVaughn Vernon\u63d0\u51fa\u7684\u4e00\u79cd\u5b9e\u73b0\u4e3a\u9762\u5411\u6301\u4e45\u5316\u7684\u8d44\u6e90\u5e93\u548c\u8fd9\u79cd\u95ee\u9898\u7a7a\u95f4\u89d2\u5ea6\u5176\u5b9e\u662f\u76f8\u901a\u7684\uff0c\u800cVaughn Vernon\u63d0\u51fa\u7684\u53e6\u4e00\u79cd\u5b9e\u73b0\u4e3a\u9762\u5411\u96c6\u5408\u7684\u8d44\u6e90\u5e93\u548c\u89e3\u7a7a\u95f4\u770b\u7684\u89d2\u5ea6\u662f\u76f8\u901a\u7684\u3002\u6211\u6682\u4e14\u5c06\u4ed3\u50a8\u5b9e\u4f53\u8f6c\u79fb\u63cf\u8ff0\u4e3a\u4e00\u79cd\u6a21\u5f0f\uff08\u540e\u9762\u7edf\u4e00\u4e3a\u4ed3\u50a8\u5b9e\u4f53\u8f6c\u79fb\u6a21\u5f0f\uff09\uff0c\u5728\u8be5\u6a21\u5f0f\u4e0b\uff0c\u4ed3\u50a8\u9886\u57df\u672c\u8d28\u4e0a\uff0c\u5e94\u8be5\u53ea\u6709\u4e24\u79cd\u64cd\u4f5c\uff1a\u653e\u7f6e\uff08put\u6216save\uff09\uff1a\u628a\u805a\u5408\u5b9e\u4f53\u4ece\u7528\u4f8b\u8fc7\u7a0b\uff0c\u653e\u7f6e\u5230\u4ed3\u50a8\u4e2d\uff0c\u72b6\u6001\u53d8\u4e3a\u4e2d\u95f4\u8fc7\u7a0b\uff0c\u7528\u4f8b\u8fc7\u7a0b\u4e2d\u4e0d\u518d\u62e5\u6709\u5b9e\u4f53\uff1b\u83b7\u53d6\uff08Take\uff09\uff1a\u7528\u4f8b\u8fc7\u7a0b\u8fd0\u884c\u4e2d\uff0c\u9700\u8981\u628a\u5b9e\u4f53\u4ece\u4e2d\u95f4\u8fc7\u7a0b\uff0c\u8f6c\u79fb\u5230\u7528\u4f8b\u8fc7\u7a0b\uff0c\u5b8c\u6210\u8fd9\u4e2a\u64cd\u4f5c\u540e\uff0c\u4ed3\u50a8\u5c06\u4e0d\u518d\u62e5\u6709\u5b9e\u4f53\uff0c\u6211\u7279\u522b\u7528take\u800c\u4e0d\u662ffind\u8868\u8fbe\u4e86\u8fd9\u79cd\u601d\u60f3\u3002\u5927\u5bb6\u53ef\u4ee5\u5bf9\u6bd4\u6570\u636e\u5e93\u7684\u64cd\u4f5c\u66f4\u65b0\u548c\u5220\u9664\u3002\u8fd9\u4e24\u4e2a\u64cd\u4f5c\u662f\u5e26\u7740\u6570\u636e\u5efa\u6a21\u7684\u601d\u60f3\uff0c\u6211\u5c06\u4f1a\u5728\u4e0b\u9762\u5173\u7cfb\u578b\u6570\u636e\u4ed3\u50a8\u4e2d\u63d0\u53ca\uff0c\u8ba9\u5927\u5bb6\u8861\u91cf\u8981\u4e0d\u8981\u4ed3\u50a8\u589e\u52a0\u8fd9\u4e24\u79cd\u884c\u4e3a\u3002\u540c\u65f6\u4e5f\u4f1a\u4ecb\u7ecd\u5728\u5173\u7cfb\u578b\u6570\u636e\u4ed3\u50a8\u5b9e\u73b0\u548c\u5185\u5b58\u4ed3\u50a8\u5b9e\u73b0\u5982\u4f55\u6539\u8fdb\u4e3a\u4ed3\u50a8\u5b9e\u4f53\u8f6c\u79fb\u6a21\u5f0f\uff0c\u8fbe\u5230\u5bf9\u6bd4\u7684\u76ee\u7684\u3002\u4f5c\u4e3a\u5f00\u53d1\u4eba\u5458\uff0c\u6211\u4eec\u5728\u5e94\u7528DDD\uff0c\u5173\u6ce8\u6a21\u578b\u7684\u65f6\u5019\u9694\u79bb\u4e86\u4e2d\u95f4\u8fc7\u7a0b\uff0c\u786e\u5b9e\u5f97\u5230\u4e86\u4ee5\u6a21\u578b\u4e3a\u5173\u6ce8\u70b9\u7684\u6982\u5ff5\u8bbe\u8ba1\uff0c\u4f46\u6211\u4eec\u8fd8\u9700\u8981\u517c\u987e\u6280\u672f\u7684\u5b9e\u73b0\u96be\u5ea6\u4ee5\u53ca\u53ef\u884c\u6027\uff0c\u5176\u5b9e\u6574\u4e2a\u4ed3\u50a8\u7684\u89e3\u51b3\u65b9\u6848\u5728\u7ec6\u8282\u4e2d\u5e76\u6ca1\u6709\u90a3\u4e48\u7b80\u5355\uff0c\u4e0b\u9762\u6211\u4eec\u5f00\u59cb\u6cbf\u7740\u9886\u57df\u6a21\u578b\u5206\u6790\u7684\u7ed3\u8bba\uff0c\u5f00\u59cb\u770b\u6280\u672f\u5b9e\u73b0\u7684\u9e3f\u6c9f\u3002\u4e09\u3001\u5b9e\u73b0\u5256\u6790\u5982\u679c\u6709\u65e0\u9650\u5927\u7684\u5185\u5b58\uff0c\u6216\u8005\u65e0\u9700\u6301\u4e45\u5316\u7684\u4e1a\u52a1\uff0cDAO\u5c42\u5fc5\u7136\u4e0d\u5b58\u5728\uff0c\u4f46\u4ed3\u50a8\uff08\u96c6\u5408\u5bb9\u5668+\u68c0\u7d22\u7684\u6570\u636e\u7ed3\u6784\uff09\u662f\u4ecd\u7136\u5b58\u5728\u7684\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u6211\u8ba4\u4e3a\uff0c\u7406\u89e3\u4ed3\u50a8\u7684\u672c\u8d28\uff0c\u4e0d\u5e94\u8be5\u4ece\u6280\u672f\u89d2\u5ea6\u601d\u8003\uff0c\u800c\u662f\u4ece\u9886\u57df\u89d2\u5ea6\u601d\u3002\u5373\u4f7f\u6211\u4eec\u5bf9\u4ed3\u50a8\u5728\u9886\u57df\u4e0a\u6709\u51e0\u4e4e\u56fa\u5b9a\u7684\u804c\u8d23\u548c\u529f\u80fd\uff0c\u5177\u4f53\u5b9e\u73b0\u7684\u4ed3\u50a8\u90fd\u5f88\u96be\u6ee1\u8db3\u5176\u9886\u57df\u6a21\u578b\u89d2\u5ea6\u7684\u529f\u80fd\u3002\u5728\u300a\u5b9e\u73b0\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\u300b\u4e00\u4e66\u4e2d\uff0cVaughn Vernon\u63d0\u51fa2\u79cd\u4ed3\u50a8\u7684\u5b9e\u73b0\u6a21\u5f0f\uff1a\u9762\u5411\u96c6\u5408\u7684\u8d44\u6e90\u5e93\uff1a\u9762\u5411\u96c6\u5408\u7684\u4ed3\u50a8\u63d0\u51fa\u7684\u662f\u5b8c\u5168\u6309\u7167\u96c6\u5408\u7684\u7406\u5ff5\u53bb\u8bbe\u8ba1\u4ed3\u50a8\uff0c\u5c31\u4f3c\u4e4e\u5b83\u5c31\u662fSet\u6570\u636e\u7ed3\u6784\u4e00\u6837\u3002\u6240\u4ee5\u4ed6\u80fd\u81ea\u52a8\u53bb\u8ddf\u8e2a\u805a\u5408\u5b9e\u4f53\u7684\u53d8\u5316\u9762\u5411\u6301\u4e45\u5316\u7684\u8d44\u6e90\u5e93\uff1a\u9762\u5411\u6301\u4e45\u5316\u7684\u4ed3\u50a8\uff0c\u6838\u5fc3\u70b9\u662f\u5408\u5e76\u4e86\u63d2\u5165\u548c\u66f4\u65b0\u8fd9\u4e24\u79cd\u64cd\u4f5c\uff0c\u7edf\u4e00\u7528 save() \u64cd\u4f5c\u5b8c\u5168\u53d6\u4ee3\u4ed3\u50a8\u65e7\u5b9e\u4f53\u4f7f\u5f97\u4ed3\u50a8\u7684\u529f\u80fd\u66f4\u7edf\u4e00\u3002\u8fd9\u79cd\u6570\u636e\u5b58\u50a8\uff08\u5982MongoDB\u7b49\u6587\u6863\u6570\u636e\u5e93\uff09\u901a\u5e38\u79f0\u4e4b\u4e3a\uff1a\u9762\u5411\u805a\u5408\u7684\u6570\u636e\u5e93\uff08Aggregation-Oriented DataBase\uff09\u6216\u805a\u5408\u5b58\u50a8\uff08Aggregation Store\uff09\u3002\u4ee5\u4e0a\u4e24\u79cd\u6a21\u5f0f\u5bf9\u4ed3\u50a8\u6765\u8bf4\u90fd\u6ca1\u6709\u7edf\u4e00\uff0c\u4ed6\u4eec\u5404\u6709\u4e0d\u540c\u7279\u70b9\uff0c\u9762\u5411\u96c6\u5408\u6a21\u5f0f\u5f3a\u8c03\u4ed3\u50a8\u4e00\u76f4\u4fdd\u6301\u8ddf\u8e2a\uff08\u5f15\u7528\uff09\uff0c\u800c\u9762\u5411\u6301\u4e45\u5316\u5219\u5f3a\u8c03\u91c7\u7528 save()\u6216\u8005 put() \u64cd\u4f5c\u5168\u91cf\u8986\u76d6\u3002\u672c\u6587\u7684\u5b9e\u73b0\u4ecb\u7ecd\u89d2\u5ea6\u4e0d\u540c\uff0c\u4f46\u6548\u679c\u5dee\u5f02\u4e0d\u5927\uff0c\u672c\u6587\u53ea\u5bf9\u5185\u5b58\u5b9e\u73b0\u548c\u5173\u7cfb\u578b\u6570\u636e\u5e93\u5b9e\u73b0\u505a\u533a\u5206\uff0c\u5e76\u5e0c\u671b\u5728\u7edf\u4e00\u7684\u89d2\u5ea6\u505a\u4e86\u4e00\u4e9b\u89e3\u8bfb\u7ed9\u8bfb\u8005\u53c2\u8003\u3002\u4f46\u6211\u8ba4\u4e3a\u8bfb\u8005\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7406\u89e3\u53bb\u4fa7\u91cd\u9009\u62e9\u81ea\u5df1\u7684\u5b9e\u73b0\u30023.1 \u5185\u5b58\u4ed3\u50a8\u5728\u300a\u5b9e\u73b0\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\u300b\u4e00\u4e66\u4e2d\uff0c\u4f5c\u8005Vaughn Vernon\u63d0\u51fa\u4e00\u79cd\u9762\u5411\u96c6\u5408\u7684\u4ed3\u50a8\uff0c\u6211\u8ba4\u4e3a\u8fd9\u5176\u5b9e\u5c31\u662f\u4e00\u79cd\u5b8c\u5168\u9762\u5411\u5185\u5b58\u5b9e\u73b0\u7684\u4ed3\u50a8\u65b9\u5f0f\uff0c\u5728\u8fd9\u79cd\u65b9\u5f0f\u4e2d\uff0c\u6211\u4eec\u5229\u7528\u4ed3\u50a8\u7ba1\u7406\u805a\u5408\u5b9e\u4f53\u7684\u751f\u547d\u5468\u671f\u4e2d\u95f4\u8fc7\u7a0b\u5176\u5b9e\u548c\u4f7f\u7528\u6846\u67b6\u96c6\u5408\uff08Collection\uff09\u662f\u4e00\u6837\u7684\u3002\u6211\u628a\u4e66\u4e2d\u7684\u4f8b\u5b50\u7a0d\u6539\u52a8\u5c55\u73b0\u5982\u4e0b\uff1apublic class CalendarRepository extends HashMap{<\/p>\n<p>private Map&lt;CalendarId,Calendar&gt; calendars;<\/p>\n<p>public CalendarRepository(){<\/p>\n<pre><code>this.calendars = new HashMap&lt;CalendarId,Calendars&gt;();<\/code><\/pre>\n<p>}<\/p>\n<p>public void add(Calendar aCalendar){<\/p>\n<pre><code>this.calendars.put(aCalendar.getId,aCalendar);<\/code><\/pre>\n<p>}<\/p>\n<p>public Calendar findCalendars(CalendarId calendarId){<\/p>\n<pre><code>return this.calendars.get(calendarId);<\/code><\/pre>\n<p>}<\/p>\n<p>}\u719f\u6089\u7f16\u7a0b\u7684\u4eba\u5458\u5f88\u7b80\u5355\u5c31\u77e5\u9053\u8fd9\u662f\u600e\u4e48\u4e00\u56de\u4e8b\u4e86\u3002\u8fd9\u4e2a\u5b9e\u73b0\u4e5f\u5f88\u80fd\u8868\u8fbe\u4ece\u9886\u57df\u6a21\u578b\u7684\u89d2\u5ea6\u770b\u4ed3\u50a8\u5e94\u8be5\u662f\u600e\u4e48\u6837\u5b50\u7684\u3002\u6211\u603b\u7ed3\u4e86\u8be5\u5b9e\u73b0\u7279\u70b9\u5982\u4e0b\uff1a\u4ed3\u50a8\u5e94\u8be5\u662f\u4e00\u4e2a\u96c6\u5408\u5b9e\u4f8b\uff0c\u800c\u4e14\u65e0\u6cd5\u5bf9\u4ed3\u50a8\u8fdb\u884c\u91cd\u590d\u7684\u653e\u7f6e\uff1b\u4ece\u4ed3\u50a8\u83b7\u53d6\u7684\u805a\u5408\u5b9e\u4f8b\uff0c\u5e94\u5f53\u548c\u653e\u7f6e\u4ed3\u50a8\u7684\u5b9e\u4f8b\u5177\u6709\u5b8c\u5168\u4e00\u6837\u7684\u72b6\u6001\uff0c\u5728\u8fd9\u91cc\u662f\u539f\u5bf9\u8c61\uff1b\u5982\u679c\u5728\u4ed3\u50a8\u4e4b\u5916\u5bf9\u805a\u5408\u5b9e\u4f8b\u8fdb\u884c\u4e86\u4fee\u6539\uff0c\u65e0\u9700\u201c\u91cd\u65b0\u4fdd\u5b58\u201d\u805a\u5408\u5b9e\u4f8b\uff1b\u8fd9\u79cd\u4ed3\u50a8\u4e0b\u7684\u805a\u5408\u5b9e\u4f53\uff0c\u770b\u8d77\u6765\u66f4\u52a0\u50cf\u8d44\u6e90Resource\uff1b\u00a0\u62b9\u53bb\u5f15\u7528\u7684\u521b\u65b0\u6539\u8fdb\uff1aVaughn Vernon\u7684\u8fd9\u4e2a\u4f8b\u5b50\u5b8c\u5168\u89e3\u6790\u4e86\u4ed3\u50a8\u5e94\u6709\u7684\u6837\u5b50\uff0c\u4f46\u5373\u4f7f\u7eaf\u5185\u5b58\u5b9e\u73b0\u4e5f\u4e0d\u5f97\u4e0d\u878d\u5165\u4e86\u5b9e\u73b0\u7684\u7279\u6027\u2014\u2014\u4ed3\u50a8\u5b8c\u5168\u6301\u6709\u96c6\u5408\u3002\u8fd9\u79cd\u6301\u6709\u5f15\u7528\u7279\u6027\u51e0\u4e4e\u5bf9\u9886\u57df\u65e0\u5f71\u54cd\uff0c\u4f46\u6211\u8fd8\u60f3\u8bd5\u56fe\u628a\u8fd9\u79cd\u5b9e\u73b0\u7279\u6027\u62b9\u6389\u3002\u5bf9\u6bd4 2.2\u4e2d\u95f4\u8fc7\u7a0b\u7684\u4ed3\u50a8\u5b9e\u4f53\u8f6c\u79fb\u4e00\u5c0f\u8282\u4e2d\uff0c\u5f53\u53d6\u51fa\u8d44\u6e90\u540e\uff0c\u96c6\u5408\u4e0d\u5e94\u8be5\u518d\u62e5\u6709\u805a\u5408\u5b9e\u4f53\u3002\u6240\u4ee5\u6309\u7167\u8fd9\u79cd\u601d\u8def\u8fdb\u884c\uff0cfindCalendars\u65b9\u6cd5\u8fd8\u5e94\u8be5\u52a0\u4e0a\u903b\u8f91\u79fb\u9664Calendar\u805a\u5408\u7684\u5b9e\u73b0\uff0c\u5982\u4e0b\u9762\u4ee3\u7801\u6240\u793a\u3002\u4f46\u8fd9\u6837\u5b8c\u5168\u6a21\u62df\u6709\u4ec0\u4e48\u597d\u5904\u5462\uff1f\u8fd9\u662f\u4e00\u4e2a\u597d\u95ee\u9898\uff0c\u56e0\u4e3a\u6211\u4eec\u7684\u9009\u62e9\u5fc5\u987b\u8981\u6743\u8861\u5176\u4e2d\u5f97\u5931\u3002\u7ee7\u7eed\u5f80\u4e0b\u770b\u4e00\u4e0b\u4e0d\u8fd9\u6837\u505a\u5f15\u8d77\u7684\u5e76\u53d1\u51b2\u7a81\u95ee\u9898&#8230;&#8230;public class CalendarRepository extends HashMap{<br \/>  \/\/\u5b58\u805a\u5408\u5b9e\u4f53<br \/>  private Map&lt;CalendarId,Calendar&gt; calendars;<br \/>  \/\/\u6807\u8bb0\u5b9e\u4f53\u88ab\u903b\u8f91\u79fb\u9664<br \/>  private Map&lt;CalendarId,Thread&gt; calendarsTakenAway;<\/p>\n<p>public CalendarRepository(){<\/p>\n<pre><code>this.calendars = new HashMap&lt;CalendarId,Calendars&gt;();<\/code><\/pre>\n<p>}<\/p>\n<p>public synchronized void add(Calendar aCalendar){<\/p>\n<pre><code>this.calendars.put(aCalendar.getId,aCalendar);\n\/\/\u79fb\u9664\u903b\u8f91\u5220\u9664\ncalendarsTakenAway.remove(aCalendar.getId)<\/code><\/pre>\n<p>}<\/p>\n<p>\/\/\u6ce8\u610f\u6211\u4eec\u6539\u4e86\u547d\u540d\u65b9\u6cd5\uff0c\u53d8\u4e3a\u4e86take\uff0c\u83b7\u53d6\uff0c\u4f53\u73b0\u4ed3\u50a8\u4e0d\u518d\u62e5\u6709\u5b9e\u4f53<br \/>  public synchronized Calendar takeCalendars(CalendarId calendarId){<\/p>\n<pre><code>\/\/\u5982\u679c\u5df2\u7ecf\u88ab\u53d6\u8fc7\uff0c\u65e0\u6cd5\u518d\u53d6\nif(calendarsTakenAway.containsKey(calendarId)){\n  return null;\n}\nCalendar calendar = this.calendars.get(calendarId);\n\/\/\u903b\u8f91\u5220\u9664\ncalendarsTakenAway.put(calendarId,Thread.currentThread());\nreturn calendar;<\/code><\/pre>\n<p>}<\/p>\n<p>}\u00a0\u8003\u8651\u5e76\u53d1\uff1a\u5728\u9886\u57df\u89d2\u5ea6\uff0c\u5728\u540c\u4e00\u4e2a\u65f6\u523b\u6ca1\u6709\u6709\u4e24\u4e2a\u4eba\u53ef\u4ee5\u540c\u65f6\u5728\u4e00\u4e2a\u4ed3\u5e93\u4e2d\u83b7\u53d6\u5230\u540c\u4e00\u4ef6\u5546\u54c1\uff0c\u4f46\u5728\u8ba1\u7b97\u673a\u89e3\u7a7a\u95f4\u4e2d\u53ef\u4ee5\uff0c\u6240\u4ee5\u8ba1\u7b97\u673a\u89e3\u7a7a\u95f4\u4f1a\u51fa\u73b0\u5e76\u53d1\u95ee\u9898\u3002\u4e3a\u4e86\u89e3\u51b3\u5e76\u53d1\u95ee\u9898\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u5f0f\u60b2\u89c2\u9501\uff1a\u5728\u4e00\u4e2a\u8c03\u5ea6\u8005\uff08\u7ebf\u7a0b\uff09\u4f7f\u7528\u8be5\u805a\u5408\u5b9e\u4f53\u524d\uff0c\u5148\u5bf9\u805a\u5408\u5b9e\u4f53\u8fdb\u884c\u52a0\u9501\uff0c\u5176\u4ed6\u8c03\u5ea6\u8005\u5219\u65e0\u6cd5\u83b7\u53d6\u5b9e\u4f53\u8fdb\u884c\u64cd\u4f5c\u963b\u585e\u60b2\u89c2\u9501\uff1a\u5982\u679c\u8c03\u5ea6\u8005\u53d1\u73b0\u805a\u5408\u5b9e\u4f53\u88ab\u9501\u4e86\u4e4b\u540e\uff0c\u5219\u505c\u6b62\u8c03\u5ea6\u76f4\u5230\u7b49\u5f85\u5f97\u5230\u5b9e\u4f53\u9501\u540e\u7ee7\u7eed\uff1b\u975e\u963b\u585e\u60b2\u89c2\u9501\uff1a\u5982\u679c\u8c03\u5ea6\u8005\u53d1\u73b0\u805a\u5408\u5b9e\u4f53\u88ab\u9501\u4e86\u4e4b\u540e\uff0c\u4e0d\u7b49\u5f85\u9501\uff0c\u7acb\u5373\u8fd4\u56de\u505a\u5176\u4ed6\u7528\u4f8b\uff1b\u4e50\u89c2\u9501\uff1a\u4e00\u4e2a\u8c03\u5ea6\u8005\u8ba4\u4e3a\u51b2\u7a81\u53ef\u80fd\u6027\u4e0d\u5927\uff0c\u6240\u4ee5\u53ef\u4ee5\u5148\u83b7\u53d6\u805a\u5408\u5b9e\u4f53\u8fdb\u884c\u4e8b\u52a1\u64cd\u4f5c\uff0c\u4f46\u662f\u5f53\u5b83\u60f3\u628a\u805a\u5408\u6301\u4e45\u5316\u7684\u65f6\u5019\uff0c\u53d1\u73b0\u6709\u4eba\u64cd\u4f5c\u8fc7\u8fd9\u4e2a\u805a\u5408\uff0c\u5219\u56de\u6eda\u81ea\u5df1\u6240\u6709\u7684\u64cd\u4f5c\u3002\u91c7\u7528\u54ea\u4e00\u79cd\u64cd\u4f5c\u5b8c\u5168\u53d6\u51b3\u4e8e\u8f6f\u4ef6\u5f00\u53d1\u4eba\u5458\uff0c\u8fd9\u4e2a\u65f6\u5019\u8981\u6c42\u6211\u4eec\u5bf9\u7a0b\u5e8f\u67b6\u6784\u8bbe\u8ba1\u548c\u8fd0\u4f5c\u65b9\u5f0f\u6709\u7740\u5145\u5206\u7684\u4e86\u89e3\uff0c\u4f46\u662f\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0c\u5176\u5b9e\u7528\u5230\u4e86\u4ed3\u50a8\u5b9e\u4f53\u8f6c\u79fb\u8fd9\u79cd\u5b8c\u5168\u6a21\u62df\u771f\u5b9e\u7684\u9886\u57df\u95ee\u9898\u7a7a\u95f4\u7684\u5b9e\u73b0\uff0c\u521a\u521a\u597d\u5c31\u662f\u975e\u963b\u585e\u60b2\u89c2\u9501\u3002\u53ea\u8981\u662ffindCalendars\u65b9\u6cd5\u5220\u9664\u627e\u5230\u7684Calendar\u5b9e\u4f53\u662f\u539f\u5b50\u6027\u7684\u64cd\u4f5c\uff0c\u5176\u4ed6\u7ebf\u7a0b\u5219\u65e0\u6cd5\u83b7\u53d6\u5230\u5b9e\u4f53\uff0c\u90a3\u4e48\u6211\u4eec\u4fbf\u4e0d\u9700\u8981\u8003\u8651\u91cd\u65b0\u8bbe\u8ba1\u4e00\u4e2a\u65b0\u7684\u9501\u65b9\u6848\u3002\u5982\u679c\u4f60\u4e0d\u662f\u4e3a\u4e86\u6027\u80fd\u7b49\u5176\u4ed6\u56e0\u7d20\u975e\u8981\u9886\u57df\u6a21\u578b\u59a5\u534f\u6216\u8005\u4f60\u521a\u597d\u9009\u62e9\u7684\u5c31\u662f\u975e\u963b\u585e\u6027\u60b2\u89c2\u9501\uff0c\u90a3\u4e48\u8fd9\u79cd\u5b9e\u73b0\u5c06\u4f1a\u5927\u5927\u7b80\u5316\u4f60\u7684\u7a0b\u5e8f\u4ee3\u7801\u91cd\u91cf\uff0c\u4e5f\u80fd\u8ba9\u5ba2\u6237\u4e86\u89e3\u4f60\u7684\u6a21\u578b\u8fd0\u4f5c\u673a\u5236\uff0c\u4f7f\u5f97\u8be5\u8fc7\u7a0b\u4e5f\u505a\u5230\u4e86\u7edf\u4e00\u8bed\u8a00\u3002\u00a0\u5373\u4f7f\u662f\u6211\u4eec\u5e38\u7528\u7684\u4e50\u89c2\u9501\uff0c\u5728\u6570\u636e\u5e93\u4ed3\u50a8\u4e0b\u4ed3\u50a8\u5b9e\u4f53\u8f6c\u79fb\u4e5f\u975e\u5e38\u9002\u7528\u3002\u6700\u540e\u660e\u786e\u4e00\u4e0b\uff0c\u505a\u5230\u7edf\u4e00\u8bed\u8a00\uff0c\u56de\u5f52\u9886\u57df\u672c\u8d28\u7684\u610f\u4e49\u975e\u5e38\u5927\u3002\u5b83\u662f\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\u5e94\u4ed8\u8f6f\u4ef6\u590d\u6742\u4e4b\u9053\u7684\u6838\u5fc3\u7406\u8bba\u57fa\u7840\u3002\u5b83\u8981\u6c42\u6211\u4eec\u6293\u4f4f\u95ee\u9898\u7684\u672c\u8d28\u590d\u6742\u5ea6\uff0c\u5c3d\u91cf\u6392\u9664\u56e0\u8ba1\u7b97\u673a\u6280\u672f\u65b9\u6848\u5f15\u5165\u7684\u5076\u7136\u590d\u6742\u5ea6\uff0c\u4ece\u800c\u5b9e\u73b0\u8f6f\u4ef6\u7684\u67b6\u6784\u4ef7\u503c\uff0c\u83b7\u53d6\u957f\u8fdc\u7684\u8f6f\u4ef6\u6548\u76ca\u30023.2 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class BusinessService {<\/p>\n<p>@Resource<br \/>  private TaskDao taskDao;<\/p>\n<p>@Resource<br \/>  private SubTaskDao subTaskDao;<\/p>\n<p>@Transactional<br \/>  public void onFinished(String subTaskId,String taskId){<\/p>\n<pre><code>\/\/\u67e5\u51fa\u6240\u6709\u5b50\u4efb\u52a1\nList&lt;SubTask&gt; subTasks = subTaskDao.getAllSubTask(taskId);\n\/\/\u627e\u51fa\u56de\u4f20\u7684\u5b50\u4efb\u52a1\nSubTask callBackTask = subTasks.stream()\n  .filter(e-&gt;subTaskId.equals(e.getSubTaskId)).findAny();\n\/\/\u66f4\u65b0\u5b50\u4efb\u52a1\u72b6\u6001\ncallBackTask.setFinished(true);\n\/\/\u5982\u679c\u6240\u6709\u5b50\u4efb\u52a1\u5b8c\u6210\uff0c\u66f4\u65b0\u4e3b\u4efb\u52a1\u72b6\u6001\nif(allFinished(subTasks)){\n   taskDao.updateStateById(taskId,TaskStatusEnum.FINISHED)\uff1b\n}\n\/\/\u66f4\u65b0\u4e00\u4e2a\u5b57\u6bb5\nsubTaskDao.updateStateById(subTaskId,TaskStatusEnum.FINISHED)\uff1b<\/code><\/pre>\n<p>}<\/p>\n<p>}\u4e0a\u9762\u7684\u4ee3\u7801\uff0c\u7528\u4f8b\u670d\u52a1\u77e5\u9053\u81ea\u5df1\u8981\u66f4\u65b0\u4ec0\u4e48\u5b57\u6bb5\uff0c\u5e76\u81ea\u884c\u53bb\u505a\u4e86\u66f4\u65b0\uff0c\u4f46\u5f53\u6211\u4eec\u5173\u6ce8\u6a21\u578b\u601d\u7ef4\u7528\u5230\u4ed3\u50a8\u7684\u4e4b\u540e\uff0c\u9488\u5bf9\u4ee5\u4e0a\u7684\u529f\u80fd\u5b9e\u73b0\u7528\u4f8b\u670d\u52a1\u5c31\u4e0d\u5e94\u8be5\u5173\u6ce8\u5230\u66f4\u65b0\u54ea\u4e00\u4e2a\u5b57\u6bb5\u8fd9\u4e2a\u548c\u6301\u4e45\u5316\u76f8\u5173\u7684\u64cd\u4f5c\uff0c\u800c\u662f\u8ba9\u4ed3\u50a8\u9700\u8981\u81ea\u884c\u53bb\u5bf9\u6bd4\uff0c\u54ea\u4e9b\u5b57\u6bb5\u53d8\u5316\u4e86\uff0c\u7136\u540e\u66f4\u65b0\u5230\u6570\u636e\u5e93\u4e2d\u53bb\uff0c\u7528\u4f8b\u670d\u52a1\u4f1a\u662f\u4e0b\u9762\u6240\u793a\u7684\u6837\u5b50\uff1apublic class BusinessDomainService {<\/p>\n<p>public void onFinished(String subTaskId,String taskId){<\/p>\n<pre><code>\/\/\u83b7\u53d6\u5b9e\u4f53\u7684\u65f6\u5019\u8bb0\u5f55\u5feb\u7167\nTask task = DomainRepository.getInstance().taskOf(taskId);\n\/\/\u805a\u5408\u5b9e\u4f53\u8d1f\u8d23\u4e1a\u52a1\u903b\u8f91\ntask.subTaskFinished(subTaskId);\n\/\/\u4ed3\u50a8\u81ea\u5df1\u8bc6\u522b\u5230\u5e95\u54ea\u4e2a\u5b57\u6bb5\u53d8\u5316\u4e86\uff0c\u7136\u540e\u66f4\u65b0\u8be5\u5b57\u6bb5\uff08\u7b80\u79f0diff\uff09\nDomainRepository.getInstance().put(task);<\/code><\/pre>\n<p>}<\/p>\n<p>}<\/p>\n<p>public class Task {<\/p>\n<pre><code>private List&lt;SubTask&gt; subTasks;\n\nprivate TaskStatusEnum status;\n\npublic void subTaskFinished(subTaskId){\n  \/\/\u627e\u51fa\u56de\u4f20\u7684\u5b50\u4efb\u52a1\n  SubTask callBackTask = subTasks.stream()\n    .filter(e-&gt;subTaskId.equals(e.getSubTaskId)).findAny();\n  \/\/\u66f4\u65b0\u5b50\u4efb\u52a1\u72b6\u6001\n  callBackTask.setFinished(true);\n  \/\/\u5982\u679c\u6240\u6709\u5b50\u4efb\u52a1\u5b8c\u6210\uff0c\u66f4\u65b0\u4e3b\u4efb\u52a1\u72b6\u6001\n  if(allFinished(subTasks)){\n     status = TaskStatusEnum.FINISHED;\n  }\n}<\/code><\/pre>\n<p>}\u4ee5\u4e0a\u5c31\u662f\u9762\u5411\u6570\u636e\u5f00\u53d1\u548c\u9762\u5411\u9886\u57df\u6a21\u578b\u7684\u4ed3\u50a8\u5f00\u53d1\u7684\u5dee\u522b\u3002\u90a3\u4e48\u8fd9\u6837\u7684\u4f8b\u5b50\u5e94\u8be5\u9009\u62e9\u54ea\u4e00\u79cd\u5b9e\u73b0\u6700\u597d\u5462\uff1f\u8fd9\u4e2a\u95ee\u9898\u4e0d\u597d\u56de\u7b54\uff0c\u65e2\u7136\u662fDDD\u90a3\u53ea\u80fd\u9009\u62e9\u4ed3\u50a8\uff0c\u8fd9\u57fa\u672c\u6d89\u53ca\u7684\u662f\u7cfb\u7edf\u5982\u4f55\u8bbe\u8ba1\u7684\u95ee\u9898\u3002\u7b80\u5355\u7684\u7cfb\u7edf\u9009\u62e9\u9762\u5411\u6570\u636e\u5f00\u53d1\u662f\u7b80\u5355\u76f4\u63a5\u7684\u3002\u4f60\u5e94\u8be5\u5728\u4ec0\u4e48\u65f6\u5019\u4f7f\u7528\u300c\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\u300d\u8fd9\u79cd\u4ed3\u50a8\u8bbe\u8ba1\u601d\u60f3\uff0c\u522b\u5fd8\u8bb0\u4e86\u5b83\u7684\u4f5c\u7528\uff1a\u590d\u6742\u6027\u8f6f\u4ef6\u5e94\u5bf9\u4e4b\u9053\u3002\u590d\u6742\u7684\u805a\u5408\u6839\u5b9e\u4f53\uff1a\u5982\u679c\u4f60\u7684\u6570\u636e\u5b57\u6bb5\u662f\u6709\u9650\u7684\uff0c\u4f46\u662f\u5b9e\u4f53\u53d8\u5316\u7684\u89c4\u5219\u662f\u591a\u79cd\u591a\u6837\u7684\uff0c\u90a3\u4e48\u5b9e\u73b0\u81ea\u52a8\u66f4\u65b0\u6a21\u5f0f\u5c06\u5f97\u5230\u597d\u5904\u3002\u5047\u8bbe\u6211\u4eec\u4e00\u4e2a\u5b9e\u4f53\u670920\u4e2a\u5b57\u6bb5\uff0c\u90a3\u4e48\u6211\u4eec diff 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\/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042708826\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br 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Diff \u903b\u8f91\u8ba9\u4ed3\u50a8\u7684\u4f7f\u7528\u548c\u5b9e\u73b0\u53d8\u5f97\u56f0\u96be\uff0c\u8bbe\u8ba1\u8005\u9700\u8981\u5728\u6574\u4e2a\u4e0a\u4e0b\u6587\u89d2\u5ea6\u4e86\u89e3\u4ed3\u50a8\u7684\u539f\u7406\u7ec6\u8282\uff0c\u56e0\u4e3a\u8981\u8ffd\u6c42\u6027\u80fd\u548c\u5b89\u5168\u7684\u5b9e\u73b0\uff0c\u8fd8\u8981\u53ea\u9488\u5bf9\u5df2\u7ecf\u53d8\u5316\u7684\u5b57\u6bb5\u66f4\u65b0\uff0c\u5ffd\u7565\u65e0\u53d8\u5316\u5b57\u6bb5\u3002\u5176\u4e2dVaughn Vernon\u5728\u300a\u5b9e\u73b0\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\u300b\u91cc\u9762\u63d0\u5230\u4e86\u4e24\u4e2a\u65b9\u6cd5\uff0c\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff1a\u9690\u5f0f\u8bfb\u65f6\u590d\u5236\uff1a\u5728\u67e5\u627e\u805a\u5408\u5b9e\u4f53\u7684\u65f6\u5019\uff0c\u8bb0\u5f55\u4e0b\u805a\u5408\u5b9e\u4f53\u7684\u6240\u6709\u72b6\u6001\uff0c\u7136\u540e\u5728\u66f4\u65b0\u7684\u65f6\u5019\uff0c\u7528\u65b0\u72b6\u6001diff\u65e7\u7684\u72b6\u6001\uff0c\u53ea\u5bf9\u7279\u5b9a\u5b57\u6bb5\u8fdb\u884c\u66f4\u65b0\uff1b\u9690\u5f0f\u5199\u65f6\u590d\u5236\uff1a\u5728\u67e5\u627e\u5230\u96c6\u5408\u5b9e\u4f53\u7684\u65f6\u5019\uff0c\u4ed3\u50a8\u628a\u805a\u5408\u5b9e\u4f53\u7684\u66f4\u65b0\u64cd\u4f5c\u9690\u5f0f\u59d4\u6d3e\u7ed9\u4ed3\u50a8\u7684\u67d0\u79cd\u673a\u5236\u8fdb\u884c\uff0c\u6240\u4ee5\u6bcf\u6b21\u66f4\u65b0\u72b6\u6001\u5b9e\u4f53\u72b6\u6001\u4ed3\u50a8\u90fd\u80fd\u8ddf\u8e2a\u5230\uff0c\u5e76\u5728\u8fd9\u4e2a\u65f6\u5019\u5bf9\u8be5\u503c\u6807\u8bb0\u4e3a\u810f\u6570\u636e\uff0c\u6700\u540e\u4ed3\u50a8\u5728\u4e8b\u52a1\u7ed3\u675f\u7684\u65f6\u5019\u628a\u810f\u6570\u636e\u7ed9\u5237\u76d8\u3002public interface TaskRepository{<\/p>\n<pre><code>\/\/\u76f8\u5f53\u4e8efindTask\uff0c\u83b7\u53d6\u5230\u7684Task\u4f1a\u88ab\u9690\u5f0f\u8ffd\u8e2a\u590d\u5236\npublic Task taskOf(String taskId);\n\npublic void addTask(Task task);\n\npublic void removeTask(String taskId);\n\/\/\u5176\u4ed6\/\u7edf\u8ba1\/\u96c6\u5408\u64cd\u4f5c\u7b49\n\/\/......<\/code><\/pre>\n<p>}\u770b\u4e0a\u9762\u4ee3\u7801\uff0c\u5728\u83b7\u53d6\u65b9\u6cd5 taskOf() \u4e2d\uff0c\u4ed3\u50a8\u8d1f\u8d23\u5f00\u59cb\u5bf9\u5b9e\u4f53\u8fdb\u884c\u8ddf\u8e2a\uff0c\u56e0\u4e3a\u5916\u754c\u8c03\u7528\u65b9\u4e0d\u611f\u77e5\u4ed3\u50a8\u5728\u8ddf\u8e2a\u5b9e\u4f53\uff0c\u6240\u4ee5\u79f0\u4e4b\u4e3a\u9690\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u805a\u5408\u7684\u4e0d\u540c\u6784\u6210\u81ea\u884c\u5b9e\u73b0\u4ee5\u4e0a\u63d0\u4f9b\u7684\u4e24\u79cd\u9690\u5f0f\u8ddf\u8e2a\u7684\u65b9\u6848\u7684\u4e00\u79cd\uff0c\u5982\u679c\u662f\u8ffd\u6c42\u6027\u80fd\u90a3\u4e48\u5199\u65f6\u590d\u5236\u6bd4\u8f83\u597d\uff0c\u5982\u679c\u662f\u91c7\u7528\u8bfb\u65f6\u590d\u5236\uff0c\u90a3\u4e48Javers\u5f00\u6e90\u6846\u67b6\u4f1a\u662f\u4e00\u4e2a\u6bd4\u8f83\u597d\u7684\u9009\u62e9\uff0c\u4f46\u8bb0\u5f97\u4e00\u5b9a\u8981\u505a\u597d\u5355\u6d4b\u3002\u4ee5\u4e0a\u4e24\u79cd\u65b9\u6848\u5176\u5b9e\u90fd\u662f\u5bf9\u5b9e\u4f53\u8fdb\u884c\u72b6\u6001\u8ddf\u8e2a\uff0c\u4f46\u8981\u6ce8\u610f\u7684\u662f\u5728\u4ecb\u7ecd\u8fd9\u4e24\u79cd\u65b9\u6848\u7684\u65f6\u5019\uff0cVaughn\u662f\u6253\u7b97\u8ba9\u4ed3\u50a8\u5f80\u9762\u5411\u96c6\u5408\u4ed3\u50a8\u7684\u601d\u8def\u8d70\u7684\uff08\u8be5\u65b9\u6cd5\u88ab\u4ed6\u5f52\u5230\u9762\u5411\u96c6\u5408\u4e00\u7ae0\uff09\u3002\u867d\u7136\u4ee5\u4e0a\u4e24\u79cd\u9690\u5f0f\u65b9\u6848\u662f\u975e\u5e38\u597d\u7684\u5b9e\u8df5\uff0c\u4f46\u6211\u8ba4\u4e3a\u8fd8\u662f\u53ef\u4ee5\u50cf\u5728\u9762\u5411\u5185\u5b58\u4ed3\u50a8\u4e00\u8282\u63d0\u5230\u7684\u4e00\u6837\uff0c\u7ee7\u7eed\u5f15\u5165\u521b\u65b0\u6539\u8fdb\u4e3a\u4ed3\u50a8\u5b9e\u4f53\u8f6c\u79fb\u6a21\u578b\uff0c\u73b0\u5728\u6211\u4eec\u770b\u4e00\u4e0b\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4ed3\u50a8\u8be5\u5982\u4f55\u5e94\u5bf9\u8fd9\u79cd\u6a21\u578b\u3002\u62b9\u53bb\u8ddf\u8e2a\u7684\u521b\u65b0\u6539\u8fdb\uff1a\u6211\u4eec\u4e0a\u9762\u63d0\u5230\u4e86\uff0c\u4ed3\u50a8\u5b9e\u4f53\u8f6c\u79fb\u6a21\u5f0f\u4e0b\uff0c\u4ed3\u50a8\u5b9e\u5219\u53ea\u6709\u4e24\u79cd\u4e3b\u8981\u64cd\u4f5c\uff0c\u4e00\u4e2a\u662f\u653e\u7f6e\u805a\u5408\u5b9e\u4f53\uff0c\u4e00\u4e2a\u662f\u83b7\u53d6\uff08Take\uff09\u805a\u5408\u5b9e\u4f53\u3002\u83b7\u53d6\u5230\u5b9e\u4f53\u540e\uff0c\u4ed3\u50a8\u5c06\u4e0d\u518d\u62e5\u6709\u5b9e\u4f53\u7ba1\u7406\u6743\u9650\u3002\u5728\u9762\u5411\u5185\u5b58\u7684\u4ed3\u50a8\u5b9e\u73b0\u4e2d\uff0c\u6211\u4eec\u53ea\u9700\u5728take\u65b9\u6cd5\u4e2dremove\u6389\u5b9e\u4f53\u5373\u53ef\u3002\u4f46\u662f\u6301\u4e45\u5316\u4e0b\u7684\u8fd9\u79cd\u4ed3\u50a8\u6a21\u5f0f\u8be5\u5982\u4f55\u5b9e\u73b0\u3001\u53c8\u6709\u4ec0\u4e48\u7279\u70b9\u5462\uff1f\u5f88\u7b80\u5355\uff0c\u53ea\u8981\u6211\u4eec\u5728\u539f\u6765\u7684\u57fa\u7840\u4e0a\uff0c\u8ba9\u4ed3\u50a8\u628a\u63d2\u5165\u548c\u66f4\u65b0\uff08\u5373\u4e0a\u9762\u7684\u8ddf\u8e2a\uff09\u64cd\u4f5c\u5c01\u88c5\u4e3a\u4e00\u4e2a\u64cd\u4f5cput\uff08\u4e5f\u53ef\u4ee5\u7528save\uff09\uff0c\u7136\u540e\u8ba9find\u64cd\u4f5c\u4e0d\u53d8\uff0c\u76f4\u63a5\u547d\u540d\u4e3atake\uff0c\u8ba9\u9886\u57df\u670d\u52a1\u8ba4\u4e3a\u4ed3\u50a8\u5b9e\u9645\u4e0a\u5df2\u7ecf\u6ca1\u6709\u5b9e\u4f53\u5373\u53ef\u5b8c\u6210\u4ed3\u50a8\u5b9e\u4f53\u8f6c\u79fb\u6a21\u5f0f\uff0c\u89e3\u6790\u5982\u4e0b\uff1a\u9886\u57df\u670d\u52a1\u89c6\u89c9\uff1a\u5728\u83b7\u53d6\uff08take\uff09\u5230\u805a\u5408\u5b9e\u4f53\u540e\uff0c\u9886\u57df\u670d\u52a1\u53ef\u4ee5\u8ba4\u4e3a\u4ed3\u50a8\u4e2d\u7684\u805a\u5408\u5b9e\u4f53\u662f\u4e0d\u5b58\u5728\u7684\uff08\u5373\u4f7f\u4ed3\u50a8\u6ca1\u6709\u5220\u9664\u805a\u5408\u5b9e\u4f53\uff09\uff1b\u5408\u5e76\u63d2\u5165\u548c\u66f4\u65b0\uff08\u5168\u8986\u76d6\uff09\uff1a\u4ed3\u50a8\u6ca1\u6709\u6240\u8c13\u7684\u66f4\u65b0\u64cd\u4f5c\uff0c\u53ea\u6709\u76f4\u63a5\u653e\u7f6e\u805a\u5408\u5b9e\u4f53\u5230\u4ed3\u50a8\u4e2d\uff0c\u53ef\u4ee5\u8ba9\u4ed3\u50a8\u5224\u65ad\u8be5\u63d2\u5165\u8fd8\u662f\u5168\u91cf\u66f4\u65b0\uff08\u5176\u5b9e\u548c\u7528\u9690\u5f0f\u8ddf\u8e2a\u5b9e\u73b0\u90e8\u5206\u66f4\u65b0\u5dee\u522b\u4e0d\u5927\uff0c\u9690\u5f0f\u8ddf\u8e2a\u66f4\u5b89\u5168\u4f46\u591a\u4e00\u4e2a\u590d\u5236\u64cd\u4f5c\uff09\uff0c\u6216\u8005\u6211\u4eec\u76f4\u63a5\u4e00\u70b9\uff0c\u5b8c\u5168\u5220\u9664\u5b9e\u4f53\u540e\u518d\u6b21\u63d2\u5165\u6216\u8005\u5168\u8986\u76d6\u5b9e\u4f53\uff1b\u5220\u9664\uff1a\u4e0d\u7ba1\u662f\u5426\u6539\u8fdb\u6a21\u578b\uff0c\u5f53\u805a\u5408\u5b9e\u4f53\u751f\u547d\u5468\u671f\u7ed3\u675f\u90fd\u9700\u8981\u53bb\u771f\u6b63\u7684\u5220\u9664\u5b9e\u4f53\uff0c\u8fd9\u4e00\u70b9\u786e\u5b9e\u4e0d\u597d\u7edf\u4e00\uff1b\u4e50\u89c2\u9501\uff1a\u6211\u4eec\u53ef\u4ee5\u5728\u5b9e\u73b0\u7684\u65f6\u5019\u5728\u5173\u7cfb\u578b\u4ed3\u50a8\u4e2d\u91c7\u7528\u4e50\u89c2\u9501\u4fdd\u8bc1\u4e00\u4e2a\u805a\u5408\u5b9e\u4f53\u4e0d\u4f1a\u5b58\u5728\u4e8e\u4e0d\u540c\u7684\u9886\u57df\u4e8b\u52a1\u4e2d\u3002\u56e0\u4e3a\u4e50\u89c2\u9501\u53ea\u4f1a\u8ba9\u5176\u4e2d\u4e00\u4e2a\u6210\u529f\uff1b<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042708827\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u5728Vaughn\u7684\u4e66\u4e2d\u4ecb\u7ecd\uff0c\u9690\u5f0f\u8bfb\u65f6\/\u5199\u65f6\u8ddf\u8e2a\u662f\u505a\u6210\u9762\u5411\u96c6\u5408\u7684Repository\uff0c\u800c\u53e6\u5916\u7528\u9762\u5411\u805a\u5408\u7684\u6570\u636e\u5e93\uff08Aggregation-Oriented DataBase\uff09\u6765\u8868\u8fbe\u4ed6\u7684\u9762\u5411\u6301\u4e45\u5316Repository\uff0c\u4e0d\u77e5\u9053\u8bfb\u8005\u662f\u5426\u80fdGet\u5230\u5176\u5b9e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u5b9e\u73b0\u7684\u4ed3\u50a8\u5b9e\u4f53\u8f6c\u79fb\u6a21\u5f0f\uff0c\u6b63\u662f\u5173\u7cfb\u578b\u6570\u636e\u5e93\u4e0b\u7684\u9762\u5411\u6301\u4e45\u5316\u7684Repository\u3002\u4f18\u70b9\uff1a\u6240\u4ee5\u5b83\u6700\u5927\u7684\u4f18\u70b9\u5c31\u662f\u65e0\u9700\u8ddf\u8e2a\u5b9e\u4f53\uff0c\u800c\u662f\u4ee5\u8f6c\u79fb\u7684\u805a\u5408\u5b9e\u4f53\u4e3a\u4e3b\uff1b\u7f3a\u70b9\uff1a\u56e0\u4e3a\u4ed3\u50a8\u5b9e\u73b0\u8981\u5168\u91cf\u8986\u76d6\u6574\u4e2a\u805a\u5408\u72b6\u6001\uff0c\u6240\u4ee5\u53ea\u9002\u5408\u7528\u5728\u7c7b\u6587\u6863\u6570\u636e\u5e93\uff0c\u5bf9\u4e8e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u5219\u9700\u8981\u590d\u6742\u7684\u9690\u5f0f\u8bfb\/\u5199\u8ddf\u8e2a\u4e86\uff1b\u5173\u7cfb\u578b\u4ed3\u50a8\u603b\u7ed3\uff1a\u4f46\u786e\u5b9e\u4e0d\u540c\u7684\u5b9e\u73b0\u4ed3\u50a8\u8868\u73b0\u51fa\u4e86\u4e0d\u540c\u7684\u7279\u70b9\uff0c\u6240\u4ee5\u4e0d\u7ba1\u7528\u4f55\u79cd\u5b9e\u73b0\uff0c\u6211\u4eec\u90fd\u9700\u8981\u4e86\u89e3\u4ed3\u50a8\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u4e0d\u7136\u662f\u65e0\u6cd5\u6b63\u786e\u4f7f\u7528\u4ed3\u50a8\u7684\u3002\u4e0b\u9762\u7ed9\u4e00\u4e2a\u56fe\u5927\u6982\u63cf\u8ff0\u4e00\u4e0b\u5173\u7cfb\u578b\u6570\u636e\u5e93\u6301\u4e45\u5316\u4ed3\u50a8\u7684\u529f\u80fd\u548c\u5185\u90e8\u7ed3\u6784\uff1a\u8bbf\u95ee\u5bf9\u8c61DAO\uff1a\u53ef\u4ee5\u5c01\u88c5\u4e00\u5c42Mapper\uff0c\u6216\u8005\u5176\u4ed6ORM\u6846\u67b6\uff0c\u63d0\u4f9bDO\u4ee5\u53ca\u5176\u4ed6\u7edf\u8ba1\u6570\u636e\uff1bConvertor\uff1a\u7ef4\u62a4\u62c6\u89e3\u89c4\u5219\u548c\u91cd\u5efa\u89c4\u5219\uff0c\u540c\u65f6\u590d\u5236\u805a\u5408\u6839\u76d1\u542c\u5668\u7684\u4e00\u4e9b\u7ec4\u88c5\uff1bDO\uff1a\u6570\u636e\u5bf9\u8c61\uff0c\u4e00\u822c\u548c\u5173\u7cfb\u578b\u6570\u636e\u8868\u4e00\u4e00\u5bf9\u5e94\uff1b\u9690\u5f0f\u72b6\u6001\u8ddf\u8e2a\uff1a\u5b9e\u73b0\u4e00\u5957\u9690\u5f0f\u8bfb\u65f6\u590d\u5236\u548c\u9690\u5f0f\u5199\u65f6\u590d\u5236\u72b6\u6001\u8ddf\u8e2a\u7684\u903b\u8f91\uff1b<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042708828\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br \/>\u5f53\u6027\u80fd\u4e0d\u662f\u5f88\u91cd\u8981\u800c\u4e14\u4ee3\u7801\u6bd4\u8f83\u91cd\u89c6\u8d28\u91cf\u7684\u65f6\u5019\uff0c\u6211\u6bd4\u8f83\u63a8\u8350\u63a8\u8350\u5728\u9886\u57df\u670d\u52a1\u7ed3\u675f\u4e4b\u524d\uff0c\u90fd\u8981\u628a\u805a\u5408\u5b9e\u4f53\u56de\u5f52\u4ed3\u50a8\uff0c\u7136\u540e\u7528\u4e50\u89c2\u9501\u628a\u6574\u4e2a\u805a\u5408\u5b9e\u4f53\u66ff\u6362\u6389\u4ed3\u50a8\u5b9e\u73b0\u4e2d\u7684\u805a\u5408\u5b9e\u4f53\u3002\u5728\u5f00\u53d1\u89c4\u8303\u7ea6\u675f\u3001\u7edf\u4e00\u8bed\u8a00\u95ed\u73af\u7684\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u6709\u4e86\u8fd9\u6761\u9ed8\u5951\u7684\u89c4\u5219\uff0c\u5c31\u4e0d\u7528\u62c5\u5fc3\u8fd9\u79cd\u6f0f\u6389\u6301\u4e45\u5316\u5b9e\u73b0\u7684\u95ee\u9898\uff0c\u4e5f\u65e0\u9700\u8003\u8651\u6211\u4eec\u5230\u5e95\u662f\u63d2\u5165\u8fd8\u662f\u66f4\u65b0\u30023.3 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\/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042708829\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><br 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Evans [\u8457].\u8d75\u4fd0[\u8bd1]2016.. \u4eba\u6c11\u90ae\u7535\u51fa\u7248\u793e\u300a\u5b9e\u73b0\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\u300bVaughn Vernon[\u8457].\u6ed5\u4e91[\u8bd1].2014.\u4e2d\u56fd\u5de5\u4fe1\u51fa\u7248\u96c6\u56e2\u539f\u6587\u94fe\u63a5\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=OSR7Jzty8BXtAxBhBnHIsw%3D%3D.Uf%2FWTWGFe%2Fe%2FGkmyAxcHVGdDAkSm41PYSli9%2Fv6JAPWckwkFpU7MvvTqKlkwVnwb\" rel=\"nofollow\">https:\/\/click.aliyun.com\/m\/10&#8230;<\/a>\u672c\u6587\u4e3a\u963f\u91cc\u4e91\u539f\u521b\u5185\u5bb9\uff0c\u672a\u7ecf\u5141\u8bb8\u4e0d\u5f97\u8f6c\u8f7d\u3002<\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042708821\">https:\/\/segmentfault.com\/a\/1190000042708821<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u4ecb\uff1a\u00a0\u300a\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\u300b\u4e2d\u7684Repository\uff08\u4e0b\u9762\u5c06\u7528\u4ed3\u50a8\u8868\u793a\uff09\u5c42\u5b9e\u9645\u4e0a\u662f\u6781\u5177\u6709\u6311\u6218\u6027\u7684\uff0c\u5bf9\u4e8e\u5b83\u7684\u7406\u89e3\uff0c\u4e5f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10006760","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006760","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006760"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006760\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}