{"id":499,"date":"2016-05-13T23:46:37","date_gmt":"2016-05-13T23:46:37","guid":{"rendered":"3cf166c6b73f030b4f67eeaeba301103"},"modified":"2016-05-13T23:46:37","modified_gmt":"2016-05-13T23:46:37","slug":"","status":"publish","type":"post","link":"https:\/\/www.xiaobo.li\/notes\/archives\/499","title":{"rendered":"\u5fae\u535afeed\/push\/pull\/\u65f6\u95f4\u5206\u533a\u62c9\u6a21\u5f0f\u67b6\u6784\u63a2\u8ba8"},"content":{"rendered":"

\u5f15\u7528\u6587\u7ae0\uff1a<\/p>\n

http:\/\/www.cnblogs.com\/sunli\/archive\/2010\/08\/24\/twitter_feeds_push_pull.html<\/p>\n

[\u6587\u7ae0\u4f5c\u8005\uff1a\u5b59\u7acb \u94fe\u63a5\uff1ahttp:\/\/www.cnblogs.com\/sunli\/ \u66f4\u65b0\u65f6\u95f4\uff1a2010-08-24]<\/p>\n

 <\/p>\n

 sns\u7cfb\u7edf\uff0c\u5fae\u535a\u7cfb\u7edf\u90fd\u5e94\u7528\u5230\u4e86feed\uff08\u6bcf\u6761\u5fae\u535a\u6216\u8005sns\u91cc\u7684\u65b0\u9c9c\u4e8b\u7b49\u6211\u4eec\u79f0\u4f5cfeed\uff09\u7cfb\u7edf\uff0c\u4e0d\u7ba1\u662ftwitter.com\u6216\u8005\u56fd\u5185\u7684\u65b0\u6d6a\u5fae\u535a\uff0c\u4eba\u4eba\u7f51\u7b49\uff0c\u5728\u5404\u79cd\u6280\u672f\u793e\u533a\uff0c\u6280\u672f\u5927\u4f1a\u4e0a\u90fd\u5728\u5206\u4eab\u81ea\u5df1\u7684feed\u67b6\u6784\uff0c\u4e5f\u5c31\u662f\u63a8\u62c9\u6a21\u5f0f\uff08timyang\u4e0a\u6b21\u4e5f\u5206\u4eab\u4e86\u65b0\u6d6a\u5fae\u8584\u7684\u6a21\u5f0f\uff09\u3002\u4e0b\u9762\u6211\u4eec\u5c31\u5fae\u535a\u7684feed\u63a8\u62c9(push,pull)\u6a21\u5f0f\u505a\u4e00\u4e0b\u63a2\u8ba8\uff0c\u5e76\u63d0\u51fa\u65b0\u7684\u65f6\u95f4\u5206\u533a\u62c9\u6a21\u5f0f\u3002<\/p>\n

     \u5f53\u4f60\u53d1\u8868\u4e00\u7bc7\u5fae\u535a\uff0c\u90a3\u4e48\u6240\u6709\u5173\u6ce8\u4f60\u7684followers\uff08\u7c89\u4e1d\uff09\u90fd\u4f1a\u5728\u4e00\u5b9a\u7684\u65f6\u95f4\u5185\u6536\u5230\u4f60\u7684\u5fae\u8584\uff0c\u8fd9\u6709\u70b9\u50cf\u7fa4\u53d1\u4e00\u5c01\u90ae\u4ef6\uff0c\u6240\u6709\u7684\u6284\u9001\u8005\u90fd\u4f1a\u5728\u4e00\u5b9a\u7684\u65f6\u95f4\u5185\u6536\u5230\u3002\u5230\u8fd9\u91cc\uff0c\u4f60\u53ef\u80fd\u89c9\u5f97\u6ca1\u6709\u4ec0\u4e48\u96be\u5ea6\u3002<\/p>\n

 <\/p>\n

    \u4f8b\u65b0\u6d6a\u5fae\u535a\u7684\u59da\u6668\u7c89\u4e1d\u67092594751\uff0c\u5979\u53d1\u8868\u4efb\u4f55\u4e00\u7bc7\u5fae\u535a\uff0c\u90fd\u9700\u89812594751\u4e2a\u7c89\u4e1d\u5728\u4e00\u5b9a\u7684\u65f6\u95f4\u5185\u6536\u5230\uff0ctwitter\u7684\u51af\u5927\u8f89\u53d1\u8868\u4e00\u7bc7\u7684\u8bdd\uff0c\u9700\u898119868\u4e2afollowers\u6536\u5230\u3002<\/p>\n

\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"<\/a><\/p>\n

 <\/p>\n

 \u56fe\u4e09\uff1a\u5fae\u535a\u6574\u4f53\u7ed3\u6784<\/p>\n

       \u56fe\u4e2d\u5c55\u793a\u4e86\u5fae\u535a\u7684\u6574\u4f53\u6570\u636e\u6d41\u7a0b\uff0c\u5148\u4e86\u89e3\u4e0b\u6574\u4f53\u7684\u6570\u636e\u7ed3\u6784\uff0c\u6ca1\u6709\u6d89\u53ca\u5230followers\u7b49\u7684\u63a8\u62c9\u6a21\u5f0f\u5904\u7406\u3002\u4e0b\u9762\u6211\u4eec\u518d\u770b\u4e0b\u63a8\u6a21\u5f0f\uff08push\uff09\uff1a<\/p>\n

\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"<\/a><\/p>\n

 \u56fe\u56db\uff1a\u63a8\u6a21\u5f0f\u7ed3\u6784<\/p>\n

   \u63a8\u6a21\u5f0f\u9700\u8981\u628a\u4e00\u7bc7\u5fae\u535a\u63a8\u9001\u7ed9\u6240\u6709\u5173\u6ce8\u4ed6\u7684\u4eba\uff08\u63a8\u7ed9\u6240\u6709\u7684\u7c89\u4e1d\uff09\uff0c\u6bd4\u5982\u59da\u6668\uff0c\u6211\u4eec\u5c31\u9700\u8981\u63a8\u9001\u7ed92594751\u4e2a\u7528\u6237\u7684feeds\u8868\u4e2d\u3002\u5f53\u7136\uff0cfeeds\u8868\u53ef\u4ee5\u5f88\u597d\u7684\u8fdb\u884csharding,\u5b58\u50a8\u4e5f\u90fd\u662f\u4e00\u4e9b\u6570\u5b57\u578b\u7684\u5b57\u6bb5\uff0c\u5b58\u50a8\u7a7a\u95f4\u53ef\u80fd\u4e0d\u662f\u5f88\u5927\uff0c\u7528\u6237\u5728\u67e5\u8be2\u81ea\u5df1\u5173\u6ce8\u7684\u6240\u6709\u4eba\u7684feed\u65f6\uff0c\u901f\u5ea6\u5feb\uff0c\u6027\u80fd\u975e\u5e38\u9ad8\uff0c\u4f46\u662f\u63a8\u9001\u91cf\u4f1a\u975e\u5e38\u5927\uff0c\u59da\u6668\u53d1\u8868\u4e00\u7bc7\uff0c\u5c31\u4f1a\u4ea7\u751f200\u591a\u4e07\u6761\u6570\u636e\u3002\u8bd5\u60f3\uff0c\u4e00\u4e2a\u5927\u91cf\u7528\u6237\u7684\u5fae\u8584\u7cfb\u7edf\u901a\u8fc7\u4f7f\u7528\u63a8\u6a21\u5f0f\uff0c\u662f\u4e0d\u662f\u4f1a\u4ea7\u751f\u975e\u5e38\u60ca\u4eba\u7684\u6570\u636e\u5462\uff1f<\/p>\n

    \u4e0b\u9762\u770b\u4e0b\u62c9\u6a21\u5f0f\uff08pull\uff09<\/p>\n

\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"<\/a><\/p>\n

 <\/p>\n

 \u56fe\u4e94\uff1a\u62c9\u6a21\u5f0f<\/p>\n

     \u62c9\u6a21\u5f0f\u53ea\u9700\u8981\u7528\u6237\u53d1\u8868\u5fae\u535a\u65f6\uff0c\u5b58\u50a8\u4e00\u6761\u5fae\u535a\u6570\u636e\u5230feeds\u8868\u4e2d(feeds\u8868\u53ef\u4ee5\u662f\u4e00\u4e2a\u4e34\u65f6\u8868\uff0c\u53ea\u4fdd\u5b58\u8fd1\u671f\u53ef\u63a5\u53d7\u8303\u56f4\u7684\u6570\u636e).\u7528\u6237\u6bcf\u6b21\u67e5\u8be2feed\u65f6\u90fd\u4f1a\u53bb\u67e5\u8be2feeds\u8868\u3002\u6bd4\u5982\u59da\u6668\u6253\u5f00\u81ea\u5df1\u7684\u5fae\u8584\u9996\u9875\uff0c\u5c31\u4ea7\u751f\uff1aSELECT id FROM feeds where uid in(following uid list) ORDER BY id DESC LIMIT n(\u67e5\u8be2\u6700\u65b0\u7684n\u6761)\uff0c\u7f13\u5b58\u5230memcached<\/p>\n

uidlist=>{data:id list,timeline:\u4e0a\u6b21\u67e5\u8be2\u51fa\u6765\u7684\u6700\u65b0\u7684\u4e00\u6761\u6570\u636e\u7684\u65f6\u95f4}<\/p>\n

\u518d\u6b21\u5237\u65b0\uff1aSELECT id FROM feeds where uid in(following uid list) AND timeline>(memcached\u5b58\u50a8\u7684\u4e0a\u6b21\u7684timeline) ORDER BY id DESC LIMIT n<\/p>\n

 <\/p>\n

    \u8fd9\u79cd\u6a21\u5f0f\u5b9e\u73b0\u8d77\u6765\u4e5f\u662f\u6bd4\u8f83\u7b80\u5355\u548c\u5bb9\u6613\u7684\uff0c\u53ea\u662f\u5728\u67e5\u8be2\u7684\u65f6\u5019\u9700\u8981\u591a\u8003\u8651\u4e0b\u7f13\u5b58\u7684\u7ed3\u6784\u3002\u4f46\u662ffeeds\u8868\u4f1a\u4ea7\u751f\u5f88\u5927\u7684\u538b\u529b\uff0c\u600e\u4e48\u8bf4feeds\u8868\u4e5f\u8981\u4fdd\u5b58\u6700\u8fd1\u5341\u5929\u534a\u4e2a\u6708\u7684\u6570\u636e\u5427\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u5927\u70b9\u7684\u7cfb\u7edf\uff0c\u8fd9\u4f1a\u4ea7\u751f\u6bd4\u8f83\u5927\u7684\u6570\u636e\uff0c\u5982\u679cfollowing\u7684\u4eba\u6570\u6bd4\u8f83\u591a\uff0c\u6570\u636e\u5e93\u7684\u538b\u529b\u5c31\u4f1a\u975e\u5e38\u5927\u3002\u800c\u4e14\u4e00\u822c\u5728\u7ebf\u7684\u7528\u6237\uff0c\u5ba2\u6237\u7aef\u90fd\u4f1a\u5b9a\u671f\u626b\u63cf\uff0c\u53c8\u4f1a\u589e\u52a0\u5f88\u5927\u7684\u538b\u529b\uff0c\u8fd9\u5728\u67e5\u8be2\u6027\u80fd\u4e0a\u6ca1\u6709\u63a8\u6a21\u5f0f\u7684\u6548\u7387\u9ad8\u3002<\/p>\n

     \u4e0b\u9762\u6211\u4eec\u5728\u5bf9\u62c9\u6a21\u5f0f\u505a\u4e00\u4e0b\u6539\u8fdb\u4f18\u5316<\/p>\n

\"\u70b9\u51fb\u67e5\u770b\u539f\u56fe\"<\/a><\/p>\n

\u56fe\u4e94\uff1a\u62c9\u6a21\u5f0f(pull)-\u6539\u8fdb\uff08\u65f6\u95f4\u5206\u533a\u62c9\u6a21\u5f0f\uff09<\/p>\n

           \u62c9\u6a21\u5f0f\u7684\u6539\u8fdb\u4e3b\u8981\u662f\u5728feeds\u7684\u5b58\u50a8\u4e0a\uff0c\u4f7f\u7528\u6309\u7167\u65f6\u95f4\u8fdb\u884c\u5206\u533a\u5b58\u50a8\u3002\u5206\u4e3a\u6700\u8fd1\u65f6\u95f4\u6bb5\uff08\u6bd4\u5982\u6700\u8fd1\u4e00\u4e2a\u5c0f\u65f6\uff09\uff0c\u8fd1\u671f\u7684\uff0c\u6bd4\u8f83\u957f\u65f6\u671f\u7b49\u7b49\u3002\u6211\u4eec\u518d\u6765\u770b\u4e0b\u67e5\u8be2\u7684\u6d41\u7a0b\uff0c\u6bd4\u5982\u59da\u6668\u767b\u9646\u5fae\u535a\u9996\u9875\uff0c\u5047\u8bbe\u7f13\u5b58\u4e2d\u6ca1\u6709\u4efb\u4f55\u6570\u636e\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u67e5\u8be2\u6bd4\u8f83\u957f\u65f6\u671f\u7684feeds\u8868\uff0c\u7136\u540e\u8fdb\u5165\u7f13\u5b58\u3002\u4e0b\u4e00\u6b21\u67e5\u8be2\uff0c\u901a\u8fc7\u67e5\u8be2\u7f13\u5b58\u4e2d\u7684\u6570\u636e\u7684timeline\uff0c\u5982\u679ctimeline\u8fd8\u5728\u6700\u8fd1\u4e00\u4e2a\u5c0f\u65f6\u5185\uff0c\u90a3\u4e48\u53ea\u9700\u8981\u67e5\u8be2\u6700\u8fd1\u4e00\u4e2a\u5c0f\u65f6\u7684\u6570\u636e\u7684feed\u8868\uff0c\u6700\u8fd1\u4e00\u4e2a\u5c0f\u65f6\u7684feeds\u8868\u6bd4\u56fe\u56db\u7684feeds\u8868\u53ef\u8981\u5c0f\u5f88\u591a\uff0c\u67e5\u8be2\u8d77\u6765\u901f\u5ea6\u80af\u5b9a\u5feb\u51e0\u4e2a\u6570\u91cf\u7ea7\u4e86\u3002<\/p>\n

          \u6539\u8fdb\u6a21\u5f0f\u7684\u91cd\u70b9\u5728\u4e8efeeds\u7684\u65f6\u95f4\u5206\u533a\u5b58\u50a8\uff0c\u6839\u636e\u4e0a\u6b21\u67e5\u8be2\u7684timeline\u6765\u51b3\u5b9a\u67e5\u8be2\u5e94\u8be5\u843d\u5728\u90a3\u4e2a\u8868\u3002\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u7ecf\u5e38\u5728\u7ebf\u7684\u7528\u6237\uff0c\u9891\u7e41\u4f7f\u7528\u7684\u5ba2\u6237\u7aef\u626b\u63cf\u64cd\u4f5c\uff0c\u7ecf\u5e38\u767b\u5f55\u7684\u7528\u6237\uff0c\u90fd\u4f1a\u843d\u5728\u6700\u8fd1\u7684feeds\u8868\u533a\u95f4\uff0c\u67e5\u8be2\u90fd\u662f\u6bd4\u8f83\u9ad8\u6548\u7684\u3002\u53ea\u6709\u90a3\u4e9b\u5341\u5929\uff0c\u534a\u4e2a\u6708\u624d\u767b\u5f55\u4e00\u6b21\u7684\u7528\u6237\u9700\u8981\u53bb\u67e5\u8be2\u6bd4\u8f83\u957f\u65f6\u95f4\u7684feeds\u5927\u8868\uff0c\u4e00\u65e6\u67e5\u8be2\u8fc7\u4e86\uff0c\u5c31\u53c8\u4f1a\u843d\u5728\u6700\u8fd1\u65f6\u95f4\u533a\u57df\uff0c\u6240\u4ee5\u6548\u7387\u4e5f\u662f\u975e\u5e38\u9ad8\u7684\u3002<\/p>\n

         \u5173\u4e8e\u65f6\u95f4\u7684\u5206\u533a\uff0c\u9700\u8981\u6839\u636e\u6570\u636e\u91cf\uff0c\u7528\u6237\u8bbf\u95ee\u7279\u70b9\u8fdb\u884c\u4e00\u4e2a\u5408\u7406\u7684\u5207\u5206\u3002\u5982\u679c\u6570\u636e\u53d1\u8868\u91cf\u975e\u5e38\u5927\uff0c\u53ef\u4ee5\u8fdb\u884c\u66f4\u591a\u7684\u5206\u533a\u3002<\/p>\n

        \u4e0a\u9762\u4ecb\u7ecd\u7684\u63a8\u6a21\u5f0f\u548c\u62c9\u6a21\u5f0f\u90fd\u6709\u5404\u81ea\u7684\u7279\u70b9\uff0c\u4e2a\u4eba\u89c9\u5f97\u65f6\u95f4\u5206\u533a\u62c9\u6a21\u5f0f\u5f25\u8865\u4e86\u56fe\u56db\u7684\u62c9\u6a21\u5f0f\u7684\u5f88\u5927\u7684\u4e0d\u8db3\uff0c\u662f\u4e00\u4e2a\u6210\u672c\u6bd4\u8f83\u4f4e\u5ec9\u7684\u89e3\u51b3\u65b9\u6848\u3002\u5f53\u7136\uff0c\u65f6\u95f4\u5206\u533a\u62c9\u6a21\u5f0f\u4e5f\u53ef\u4ee5\u7ed3\u5408\u63a8\u6a21\u5f0f\uff0c\u6839\u636e\u67d0\u4e9b\u7279\u70b9\u6765\u589e\u52a0\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5f15\u7528\u6587\u7ae0\uff1a<\/p>\n

http:\/\/www.cnblogs.com\/sunli\/archive\/2010\/08\/24\/twitter_feeds_push_pull.html<\/p>\n

[\u6587\u7ae0\u4f5c\u8005\uff1a\u5b59\u7acb \u94fe\u63a5\uff1ahttp:\/\/www.cnblogs.com\/sunli\/ \u66f4\u65b0\u65f6\u95f4\uff1a2010-08-24]<\/p>\n

 <\/p>\n

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