{"id":187403,"date":"2020-11-05T01:03:40","date_gmt":"2020-11-04T17:03:40","guid":{"rendered":"http:\/\/4563.org\/?p=187403"},"modified":"2020-11-05T01:03:40","modified_gmt":"2020-11-04T17:03:40","slug":"%e5%a6%82%e6%9e%9c%e4%b8%80%e6%ae%b5%e4%bb%a3%e7%a0%81%e6%b5%81%e7%a8%8b%e9%87%8c%e6%9c%89%e5%be%88%e5%a4%9a%e9%a1%ba%e5%ba%8f%e6%93%8d%e4%bd%9c%ef%bc%8c%e5%9c%a8%e6%9f%90%e4%b8%aa%e6%ad%a5%e9%aa%a4","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=187403","title":{"rendered":"\u5982\u679c\u4e00\u6bb5\u4ee3\u7801\u6d41\u7a0b\u91cc\u6709\u5f88\u591a\u987a\u5e8f\u64cd\u4f5c\uff0c\u5728\u67d0\u4e2a\u6b65\u9aa4\u5931\u8d25\u7684\u65f6\u5019\uff0c\u9700\u8981\u56de\u9000\u4e4b\u524d\u7684\u64cd\u4f5c\uff0c\u600e\u4e48\u5199\u4f18\u96c5\u5462\uff1f"},"content":{"rendered":"
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\u5982\u679c\u4e00\u6bb5\u4ee3\u7801\u6d41\u7a0b\u91cc\u6709\u5f88\u591a\u987a\u5e8f\u64cd\u4f5c\uff0c\u5728\u67d0\u4e2a\u6b65\u9aa4\u5931\u8d25\u7684\u65f6\u5019\uff0c\u9700\u8981\u56de\u9000\u4e4b\u524d\u7684\u64cd\u4f5c\uff0c\u600e\u4e48\u5199\u4f18\u96c5\u5462\uff1f <\/h1>\n

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\u8cc7\u6df1\u5927\u4f6c : rrfeng <\/span> <\/i> 4<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
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\u4ee5 golang \u4e3a\u4f8b\uff1a<\/p>\n

func do() {     err := step1()     if err != nil { return err}      err = step2()     if err != nil {         rollback_err = undo_step1();         if rollback_err != nil {             return err         }     } } <\/code><\/pre>\n
\u8fd9\u6837\u5199\u7684\u7f3a\u70b9\u662f\uff0c\u6b65\u6570\u8d8a\u591a\u540e\u9762\u8d8a\u590d\u6742\u3002<\/p>\n
\u5c1d\u8bd5\u6bcf\u4e2a\u6b65\u9aa4\u540e\u4f7f\u7528 defer \u6ce8\u518c rollback\uff0c\u5e26\u6765\u7684\u95ee\u9898\u662f\u65e0\u6cd5\u76f4\u63a5\u8df3\u51fa defer \u6808\uff1a \u6bd4\u5982 step3 \u9519\u8bef\uff0cundo_step2() \u4e5f\u8981\u8fdb\u884c\u9519\u8bef\u5904\u7406\uff0c\u5982\u679c\u4e5f\u9519\u8bef\uff0c\u90a3\u5e94\u8be5\u76f4\u63a5\u8fd4\u56de\u9519\u8bef\u800c\u4e0d\u662f\u7ee7\u7eed\u6267\u884c undo_step1 \uff08\u5728 step1 \u4e4b\u540e\u6ce8\u518c\u7684 defer \uff09<\/p>\n
\u6709\u4ec0\u4e48\u66f4\u597d\u7684\u6a21\u5f0f\u5417\uff1f<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (5<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : K1W1 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 goto \uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : ningmengmao <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7528\u804c\u8d23\u94fe\u6a21\u5f0f\u8bd5\u8bd5\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : seth19960929 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7528\u4e00\u4e2a\u6570\u7ec4\u5305\u88c5\u6240\u6709\u51fd\u6570
    \u6267\u884c\u5931\u8d25\u6570\u7ec4\u6307\u9488\u56de\u6eda\u4e00\u4f4d
    \u56de\u6eda\u4e86\u4e24\u6b21\u76f4\u63a5\u8df3\u51fa\u6570\u7ec4\u5faa\u73af                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : aragakiyuii <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5199\u4e2a\u63a5\u53e3\uff0c\u5305\u62ec\u64cd\u4f5c\u548c\u56de\u6eda\u65b9\u6cd5\uff0c\u5206\u522b\u5b9e\u73b0\u7136\u540e\u653e\u5230\u6570\u7ec4\u91cc…                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : jinhan13789991 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u8bbe\u8ba1\u6a21\u5f0f\u5728\u5907\u5fd8\u5f55\u6a21\u5f0f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    \u5982\u679c\u4e00\u6bb5\u4ee3\u7801\u6d41\u7a0b\u91cc\u6709\u5f88\u591a\u987a\u5e8f\u64cd\u4f5c\uff0c…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/187403"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=187403"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/187403\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=187403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=187403"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=187403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}