{"id":604,"date":"2026-04-03T07:05:31","date_gmt":"2026-04-03T07:05:31","guid":{"rendered":"https:\/\/www.viz-tools.com\/vi\/refactoring-legacy-code-uml-activity-diagrams\/"},"modified":"2026-04-03T07:05:31","modified_gmt":"2026-04-03T07:05:31","slug":"refactoring-legacy-code-uml-activity-diagrams","status":"publish","type":"post","link":"https:\/\/www.viz-tools.com\/vi\/refactoring-legacy-code-uml-activity-diagrams\/","title":{"rendered":"T\u1eeb h\u1ed7n lo\u1ea1n \u0111\u1ebfn r\u00f5 r\u00e0ng: T\u00e1i c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n c\u0169 b\u1eb1ng s\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng UML"},"content":{"rendered":"

M\u1ed7i h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m \u0111\u1ec1u mang theo m\u1ed9t l\u1ecbch s\u1eed. \ud83d\udcdc Trong nhi\u1ec1u n\u0103m, y\u00eau c\u1ea7u thay \u0111\u1ed5i, t\u00ednh n\u0103ng t\u00edch l\u0169y v\u00e0 c\u00e1c b\u1ea3n v\u00e1 ch\u1ed3ng ch\u1ea5t l\u00ean nhau. K\u1ebft qu\u1ea3 th\u01b0\u1eddng l\u00e0 m\u1ed9t c\u01a1 s\u1edf m\u00e3 ngu\u1ed3n v\u1eabn ho\u1ea1t \u0111\u1ed9ng nh\u01b0ng l\u1ea1i gi\u1ed1ng nh\u01b0 m\u1ed9t c\u00e2u \u0111\u1ed1 thi\u1ebfu m\u1ea3nh gh\u00e9p. \u0110\u00e2y ch\u00ednh l\u00e0 tr\u1ea1ng th\u00e1i c\u1ee7a m\u00e3 ngu\u1ed3n c\u0169. N\u00f3 ho\u1ea1t \u0111\u1ed9ng, nh\u01b0ng l\u1ea1i ch\u1ed1ng l\u1ea1i m\u1ecdi thay \u0111\u1ed5i. C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n e ng\u1ea1i ch\u1ea1m v\u00e0o n\u00f3, lo s\u1ee3 nh\u1eefng h\u1ec7 qu\u1ea3 kh\u00f4ng mong mu\u1ed1n. S\u1ef1 im l\u1eb7ng c\u1ee7a kho l\u01b0u tr\u1eef th\u01b0\u1eddng che gi\u1ea5u m\u1ed9t v\u1ea5n \u0111\u1ec1 l\u1edbn: n\u1ee3 k\u1ef9 thu\u1eadt.<\/p>\n

T\u00e1i c\u1ea5u tr\u00fac kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 vi\u1ebft l\u1ea1i m\u00e3 ngu\u1ed3n; \u0111\u00f3 l\u00e0 vi\u1ec7c kh\u00f4i ph\u1ee5c s\u1ef1 hi\u1ec3u bi\u1ebft. Khi logic b\u1ecb \u1ea9n s\u00e2u trong c\u00e1c v\u00f2ng l\u1eb7p l\u1ed3ng nhau v\u00e0 nh\u1eefng t\u00ean bi\u1ebfn kh\u00f3 hi\u1ec3u, c\u00e1ch duy nh\u1ea5t \u0111\u1ec3 ti\u1ebfn b\u01b0\u1edbc l\u00e0 tr\u1ef1c quan h\u00f3a. \u0110\u00e2y ch\u00ednh l\u00e0 l\u00facS\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng UML<\/strong>tr\u1edf n\u00ean thi\u1ebft y\u1ebfu. Ch\u00fang chuy\u1ec3n \u0111\u1ed5i lu\u1ed3ng th\u1ef1c thi tr\u1eebu t\u01b0\u1ee3ng th\u00e0nh m\u1ed9t ng\u00f4n ng\u1eef tr\u1ef1c quan m\u00e0 c\u00e1c \u0111\u1ed9i c\u00f3 th\u1ec3 ki\u1ec3m tra, ph\u1ea3n bi\u1ec7n v\u00e0 c\u1ea3i thi\u1ec7n.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1ch chuy\u1ec3n t\u1eeb h\u1ed7n lo\u1ea1n sang r\u00f5 r\u00e0ng. Ch\u00fang ta s\u1ebd xem x\u00e9t vi\u1ec7c \u00e1nh x\u1ea1 logic hi\u1ec7n c\u00f3 v\u00e0o s\u01a1 \u0111\u1ed3, x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m ngh\u1ebdn v\u00e0 x\u00e2y d\u1ef1ng chi\u1ebfn l\u01b0\u1ee3c t\u00e1i c\u1ea5u tr\u00fac \u01b0u ti\u00ean \u1ed5n \u0111\u1ecbnh h\u01a1n t\u1ed1c \u0111\u1ed9. Kh\u00f4ng c\u00f3 c\u00f4ng c\u1ee5 ph\u00e9p m\u00e0u, kh\u00f4ng c\u00f3 l\u1eddi qu\u1ea3ng c\u00e1o. Ch\u1ec9 c\u00f3 nh\u1eefng th\u1ef1c h\u00e0nh k\u1ef9 thu\u1eadt h\u1ec7 th\u1ed1ng.<\/p>\n

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\"Infographic:<\/figure>\n<\/div>\n

\ud83c\udf2a\ufe0f T\u1ea1i sao m\u00e3 ngu\u1ed3n c\u0169 tr\u1edf n\u00ean h\u1ed7n lo\u1ea1n<\/h2>\n

C\u00e1c h\u1ec7 th\u1ed1ng c\u0169 kh\u00f4ng t\u1ef1 b\u1ea3n th\u00e2n \u0111\u00e3 x\u1ea5u. Ch\u00fang l\u00e0 nh\u1eefng h\u1ec7 th\u1ed1ng \u0111\u00e3 tr\u1ea3i qua th\u1eddi gian. S\u1ef1 h\u1ed7n lo\u1ea1n n\u1ea3y sinh t\u1eeb kho\u1ea3ng c\u00e1ch gi\u1eefa m\u1ee5c \u0111\u00edch ban \u0111\u1ea7u v\u00e0 th\u1ef1c t\u1ebf hi\u1ec7n t\u1ea1i. M\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 g\u00f3p ph\u1ea7n v\u00e0o s\u1ef1 l\u1ec7ch l\u1ea1c n\u00e0y:<\/p>\n

    \n
  • Suy tho\u00e1i t\u00e0i li\u1ec7u:<\/strong>C\u00e1c t\u00e0i li\u1ec7u m\u00f4 t\u1ea3 \u0111\u01b0\u1ee3c vi\u1ebft ra nhanh ch\u00f3ng tr\u1edf n\u00ean l\u1ed7i th\u1eddi ngay khi l\u1ea7n commit \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c \u0111\u1ea9y l\u00ean. Nh\u1eefng g\u00ec \u0111\u00fang h\u00f4m qua th\u00ec \u0111\u00e3 sai h\u00f4m nay.<\/li>\n
  • Y\u1ebfu t\u1ed1 xe bu\u00fdt:<\/strong>Ki\u1ebfn th\u1ee9c ch\u1ec9 t\u1ed3n t\u1ea1i trong \u0111\u1ea7u c\u1ee7a m\u1ed9t v\u00e0i k\u1ef9 s\u01b0 c\u1ea5p cao. Khi h\u1ecd r\u1eddi \u0111i, h\u1ec7 th\u1ed1ng tr\u1edf th\u00e0nh m\u1ed9t h\u1ed9p \u0111en.<\/li>\n
  • Logic h\u1ed7n \u0111\u1ed9n:<\/strong>C\u00e1c c\u00e2u l\u1ec7nh \u0111i\u1ec1u ki\u1ec7n l\u1ed3ng nhau \u0111\u1ebfn ba c\u1ea5p \u0111\u1ed9 khi\u1ebfn vi\u1ec7c theo d\u00f5i \u0111\u01b0\u1eddng \u0111i th\u1ef1c thi tr\u1edf n\u00ean b\u1ea5t kh\u1ea3 thi n\u1ebfu kh\u00f4ng d\u00f9ng tr\u00ecnh g\u1ee1 l\u1ed7i.<\/li>\n
  • S\u1ef1 lan r\u1ed9ng t\u00ednh n\u0103ng:<\/strong>C\u00e1c y\u00eau c\u1ea7u m\u1edbi \u0111\u01b0\u1ee3c g\u1eafn th\u00eam v\u00e0o c\u1ea5u tr\u00fac c\u0169 thay v\u00ec \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p m\u1ed9t c\u00e1ch s\u1ea1ch s\u1ebd.<\/li>\n<\/ul>\n

    Khi m\u1ed9t nh\u00e0 ph\u00e1t tri\u1ec3n c\u1ea7n s\u1eeda \u0111\u1ed5i m\u1ed9t module x\u1eed l\u00fd thanh to\u00e1n, h\u1ecd c\u00f3 th\u1ec3 kh\u00f4ng bi\u1ebft m\u1ed9t \u0111i\u1ec1u ki\u1ec7n c\u1ee5 th\u1ec3 c\u00f3 k\u00edch ho\u1ea1t vi\u1ec7c ho\u00e0n t\u00e1c c\u01a1 s\u1edf d\u1eef li\u1ec7u hay g\u1eedi th\u00f4ng b\u00e1o email hay kh\u00f4ng. \u0110o\u00e1n m\u00f2 d\u1eabn \u0111\u1ebfn l\u1ed7i. Vi\u1ec7c tr\u1ef1c quan h\u00f3a lu\u1ed3ng s\u1ebd lo\u1ea1i b\u1ecf s\u1ef1 \u0111o\u00e1n m\u00f2.<\/p>\n

    \ud83d\udcca Hi\u1ec3u v\u1ec1 s\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng UML<\/h2>\n

    S\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng UML l\u00e0 c\u00e1c s\u01a1 \u0111\u1ed3 h\u00e0nh vi m\u00f4 t\u1ea3 c\u00e1c kh\u00eda c\u1ea1nh \u0111\u1ed9ng c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng. Trong khi s\u01a1 \u0111\u1ed3 l\u1edbp th\u1ec3 hi\u1ec7n c\u1ea5u tr\u00fac, s\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng th\u1ec3 hi\u1ec7n lu\u1ed3ng. H\u00e3y h\u00ecnh dung ch\u00fang nh\u01b0 nh\u1eefng s\u01a1 \u0111\u1ed3 lu\u1ed3ng tinh vi h\u1ed7 tr\u1ee3 \u0111\u1ed3ng th\u1eddi, \u0111i\u1ec3m ra quy\u1ebft \u0111\u1ecbnh v\u00e0 lu\u1ed3ng \u0111\u1ed1i t\u01b0\u1ee3ng.<\/p>\n

    \u0110\u1ed1i v\u1edbi t\u00e1i c\u1ea5u tr\u00fac, s\u01a1 \u0111\u1ed3 \u0111\u00f3ng vai tr\u00f2 l\u00e0 ngu\u1ed3n ch\u00e2n l\u00fd. N\u00f3 \u0111\u1ea1i di\u1ec7n choh\u00e0nh vi<\/em>c\u1ee7a m\u00e3 ngu\u1ed3n, \u0111\u1ed9c l\u1eadp v\u1edbi ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh c\u1ee5 th\u1ec3. S\u1ef1 tr\u1eebu t\u01b0\u1ee3ng n\u00e0y l\u00e0 \u0111i\u1ec1u then ch\u1ed1t v\u00ec n\u00f3 cho ph\u00e9p \u0111\u1ed9i ng\u0169 t\u1eadp trung v\u00e0o logic thay v\u00ec c\u00fa ph\u00e1p.<\/p>\n

    C\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh cho t\u00e1i c\u1ea5u tr\u00fac<\/h3>\n

    \u0110\u1ec3 m\u00f4 h\u00ecnh h\u00f3a hi\u1ec7u qu\u1ea3 c\u00e1c h\u1ec7 th\u1ed1ng c\u0169, b\u1ea1n ph\u1ea3i hi\u1ec3u r\u00f5 c\u00e1c k\u00fd hi\u1ec7u c\u1ed1t l\u00f5i. Nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y \u00e1nh x\u1ea1 tr\u1ef1c ti\u1ebfp \u0111\u1ebfn c\u00e1c c\u1ea5u tr\u00fac l\u1eadp tr\u00ecnh:<\/p>\n

      \n
    • N\u00fat kh\u1edfi \u0111\u1ea7u:<\/strong>\u0110i\u1ec3m v\u00e0o c\u1ee7a ho\u1ea1t \u0111\u1ed9ng. Trong m\u00e3 ngu\u1ed3n, \u0111\u00e2y l\u00e0 k\u00fd hi\u1ec7u h\u00e0m ho\u1eb7c ph\u01b0\u01a1ng th\u1ee9c.<\/li>\n
    • Tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng:<\/strong>M\u1ed9t kho\u1ea3ng th\u1eddi gian x\u1eed l\u00fd. \u0110i\u1ec1u n\u00e0y t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed9t kh\u1ed1i m\u00e3, l\u1eddi g\u1ecdi h\u00e0m ho\u1eb7c th\u00e2n v\u00f2ng l\u1eb7p.<\/li>\n
    • Lu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n:<\/strong>Nh\u1eefng m\u0169i t\u00ean k\u1ebft n\u1ed1i c\u00e1c n\u00fat. Ch\u00fang \u0111\u1ea1i di\u1ec7n cho th\u1ee9 t\u1ef1 th\u1ef1c thi.<\/li>\n
    • N\u00fat quy\u1ebft \u0111\u1ecbnh:<\/strong> H\u00ecnh thoi. \u0110i\u1ec1u n\u00e0y t\u01b0\u01a1ng \u1ee9ng v\u1edbi n\u1ebfu<\/code>, ng\u01b0\u1ee3c l\u1ea1i<\/code>, ho\u1eb7c switch<\/code> c\u00e2u l\u1ec7nh. M\u1ed7i c\u1ea1nh \u0111\u1ea7u ra \u0111\u1ec1u c\u00f3 \u0111i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7.<\/li>\n
    • N\u00fat h\u1ee3p nh\u1ea5t:<\/strong> N\u01a1i nhi\u1ec1u lu\u1ed3ng h\u1ed9i t\u1ee5 tr\u1edf l\u1ea1i th\u00e0nh m\u1ed9t \u0111\u01b0\u1eddng \u0111i.<\/li>\n
    • Chia\/T\u1ed5ng h\u1ee3p:<\/strong> Ch\u00fang \u0111\u1ea1i di\u1ec7n cho th\u1ef1c thi song song. R\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng x\u1eed l\u00fd lu\u1ed3ng ho\u1eb7c t\u00e1c v\u1ee5 b\u1ea5t \u0111\u1ed3ng b\u1ed9.<\/li>\n
    • N\u00fat k\u1ebft th\u00fac:<\/strong> \u0110i\u1ec3m k\u1ebft th\u00fac. M\u00e3 tr\u1ea3 v\u1ec1 ho\u1eb7c tho\u00e1t ra.<\/li>\n<\/ul>\n

      S\u1eed d\u1ee5ng c\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf m\u1ed9t h\u1ec7 th\u1ed1ng. B\u1ea1n \u0111\u1ecdc m\u00e3 ngu\u1ed3n, tr\u00edch xu\u1ea5t logic v\u00e0 v\u1ebd s\u01a1 \u0111\u1ed3. Sau khi v\u1ebd xong, s\u01a1 \u0111\u1ed3 tr\u1edf th\u00e0nh b\u1ea3n v\u1ebd thi\u1ebft k\u1ebf cho phi\u00ean b\u1ea3n \u0111\u01b0\u1ee3c c\u1ea3i ti\u1ebfn.<\/p>\n

      \ud83d\udd04 Quy tr\u00ecnh: Chuy\u1ec3n \u0111\u1ed5i logic th\u00e0nh lu\u1ed3ng<\/h2>\n

      T\u00e1i c\u1ea5u tr\u00fac b\u1eb1ng s\u01a1 \u0111\u1ed3 l\u00e0 m\u1ed9t chu k\u1ef3 b\u1ed1n giai \u0111o\u1ea1n: Ph\u00e2n t\u00edch ng\u01b0\u1ee3c, Ph\u00e2n t\u00edch, T\u00e1i c\u1ea5u tr\u00fac v\u00e0 X\u00e1c minh. M\u1ed7i giai \u0111o\u1ea1n \u0111\u1ec1u \u0111\u00f2i h\u1ecfi s\u1ef1 k\u1ef7 lu\u1eadt.<\/p>\n

      Giai \u0111o\u1ea1n 1: Ph\u00e2n t\u00edch ng\u01b0\u1ee3c<\/h3>\n

      B\u1eaft \u0111\u1ea7u t\u1eeb c\u00e1c \u0111\u01b0\u1eddng \u0111i quan tr\u1ecdng. \u0110\u1eebng c\u1ed1 g\u1eafng v\u1ebd s\u01a1 \u0111\u1ed3 cho t\u1eebng d\u00f2ng m\u00e3. T\u1eadp trung v\u00e0o c\u00e1c quy tr\u00ecnh c\u00f3 gi\u00e1 tr\u1ecb cao. V\u00ed d\u1ee5, n\u1ebfu h\u1ec7 th\u1ed1ng x\u1eed l\u00fd x\u00e1c th\u1ef1c ng\u01b0\u1eddi d\u00f9ng, h\u00e3y v\u1ebd s\u01a1 \u0111\u1ed3 cho qu\u00e1 tr\u00ecnh \u0111\u0103ng nh\u1eadp, sinh token v\u00e0 x\u00e1c th\u1ef1c phi\u00ean l\u00e0m vi\u1ec7c.<\/p>\n

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      1. Ch\u1ecdn \u0111i\u1ec3m v\u00e0o:<\/strong> X\u00e1c \u0111\u1ecbnh \u0111i\u1ec3m cu\u1ed1i API ho\u1eb7c h\u00e0m \u0111\u1ea7u v\u00e0o ch\u00ednh.<\/li>\n
      2. Theo d\u00f5i qu\u00e1 tr\u00ecnh th\u1ef1c thi:<\/strong> Theo d\u00f5i \u0111\u01b0\u1eddng \u0111i m\u00e3 ngu\u1ed3n. Ghi ch\u00fa l\u1ea1i m\u1ecdi nh\u00e1nh.<\/li>\n
      3. Ghi l\u1ea1i bi\u1ebfn:<\/strong> Ghi ch\u00fa n\u01a1i d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u1ea1o, thay \u0111\u1ed5i ho\u1eb7c h\u1ee7y. Lu\u1ed3ng \u0111\u1ed1i t\u01b0\u1ee3ng gi\u00fap theo d\u00f5i s\u1ef1 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i.<\/li>\n
      4. X\u00e1c \u0111\u1ecbnh c\u00e1c ph\u1ee5 thu\u1ed9c b\u00ean ngo\u00e0i:<\/strong> Ghi ch\u00fa c\u00e1c l\u1eddi g\u1ecdi \u0111\u1ebfn c\u01a1 s\u1edf d\u1eef li\u1ec7u, API ho\u1eb7c h\u1ec7 th\u1ed1ng t\u1ec7p nh\u01b0 c\u00e1c lu\u1ed3ng ri\u00eang bi\u1ec7t ho\u1eb7c h\u00e0nh \u0111\u1ed9ng.<\/li>\n<\/ol>\n

        Giai \u0111o\u1ea1n 2: Ph\u00e2n t\u00edch v\u00e0 x\u00e1c \u0111\u1ecbnh n\u1ee3 k\u1ef9 thu\u1eadt<\/h3>\n

        Sau khi v\u1ebd s\u01a1 \u0111\u1ed3, h\u00e3y t\u00ecm c\u00e1c m\u1eabu h\u00ecnh cho th\u1ea5y thi\u1ebft k\u1ebf k\u00e9m. Nh\u1eefng b\u1ea5t th\u01b0\u1eddng v\u1ec1 m\u1eb7t tr\u1ef1c quan th\u01b0\u1eddng ch\u1ec9 ra n\u1ee3 k\u1ef9 thu\u1eadt.<\/p>\n\n\n\n\n\n\n
        M\u1eabu h\u00ecnh tr\u1ef1c quan<\/th>\nH\u1ec7 qu\u1ea3 m\u00e3 ngu\u1ed3n<\/th>\nH\u00e0nh \u0111\u1ed9ng t\u00e1i c\u1ea5u tr\u00fac<\/th>\n<\/tr>\n
        C\u00e1c n\u00fat li\u00ean k\u1ebft ch\u1eb7t ch\u1ebd (nh\u00f3m d\u00e0y \u0111\u1eb7c)<\/td>\nLogic li\u00ean k\u1ebft ch\u1eb7t, kh\u00f3 t\u00e1ch bi\u1ec7t<\/td>\nTr\u00edch xu\u1ea5t ph\u01b0\u01a1ng th\u1ee9c, t\u1ea1o giao di\u1ec7n<\/td>\n<\/tr>\n
        Nhi\u1ec1u n\u00fat quy\u1ebft \u0111\u1ecbnh n\u1ed1i ti\u1ebfp nhau<\/td>\nC\u00e1c \u0111i\u1ec1u ki\u1ec7n ph\u1ee9c t\u1ea1p<\/td>\nC\u00e1c c\u00e2u l\u1ec7nh b\u1ea3o v\u1ec7 ho\u1eb7c M\u1eabu Chi\u1ebfn l\u01b0\u1ee3c<\/td>\n<\/tr>\n
        C\u00e1c lu\u1ed3ng song song m\u00e0 kh\u00f4ng c\u00f3 \u0111\u1ed3ng b\u1ed9 h\u00f3a<\/td>\nV\u1ea5n \u0111\u1ec1 \u0111\u1ed3ng th\u1eddi, \u0111i\u1ec1u ki\u1ec7n c\u1ea1nh tranh<\/td>\nTh\u1ef1c hi\u1ec7n kh\u00f3a ho\u1eb7c nh\u00f3m lu\u1ed3ng<\/td>\n<\/tr>\n
        Chu\u1ed7i d\u00e0i, kh\u00f4ng b\u1ecb ng\u1eaft qu\u00e3ng<\/td>\nC\u00e1c h\u00e0m kh\u1ed1i l\u1edbn<\/td>\nChia th\u00e0nh c\u00e1c ho\u1ea1t \u0111\u1ed9ng con nh\u1ecf h\u01a1n<\/td>\n<\/tr>\n<\/table>\n

        B\u1eb1ng c\u00e1ch nh\u1eadn di\u1ec7n nh\u1eefng m\u1eabu n\u00e0y, b\u1ea1n x\u00e1c \u0111\u1ecbnh \u01b0u ti\u00ean cho nh\u1eefng ph\u1ea7n m\u00e3 ngu\u1ed3n c\u1ea7n s\u1ef1 ch\u00fa \u00fd ngay l\u1eadp t\u1ee9c. M\u1ed9t c\u1ee5m d\u00e0y \u0111\u1eb7c c\u00f3 th\u1ec3 l\u00e0 nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 c\u1ee7a c\u00e1c l\u1ed7i th\u01b0\u1eddng xuy\u00ean.<\/p>\n

        \ud83d\udee0\ufe0f Chi\u1ebfn l\u01b0\u1ee3c t\u00e1i c\u1ea5u tr\u00fac t\u1eebng b\u01b0\u1edbc<\/h2>\n

        V\u1edbi s\u01a1 \u0111\u1ed3 trong tay, b\u1ea1n c\u00f3 th\u1ec3 l\u00ean k\u1ebf ho\u1ea1ch t\u00e1i c\u1ea5u tr\u00fac. M\u1ee5c ti\u00eau l\u00e0 duy tr\u00ec ch\u1ee9c n\u0103ng \u0111\u1ed3ng th\u1eddi c\u1ea3i thi\u1ec7n c\u1ea5u tr\u00fac. S\u01a1 \u0111\u1ed3 \u0111\u00f3ng vai tr\u00f2 nh\u01b0 h\u1ee3p \u0111\u1ed3ng. Trong khi m\u00e3 m\u1edbi t\u1ea1o ra c\u00f9ng m\u1ed9t s\u01a1 \u0111\u1ed3, h\u00e0nh vi s\u1ebd \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n.<\/p>\n

          \n
        • 1. T\u00e1ch bi\u1ec7t logic:<\/strong> T\u1ea1o m\u1ed9t module ho\u1eb7c g\u00f3i m\u1edbi. Kh\u00f4ng s\u1eeda \u0111\u1ed5i m\u00e3 ngu\u1ed3n c\u0169 tr\u1ef1c ti\u1ebfp.<\/li>\n
        • 2. Th\u1ef1c hi\u1ec7n lu\u1ed3ng \u0111\u00e3 \u0111\u01a1n gi\u1ea3n h\u00f3a:<\/strong> Vi\u1ebft m\u00e3 ngu\u1ed3n ph\u00f9 h\u1ee3p v\u1edbi phi\u00ean b\u1ea3n \u0111\u00e3 \u0111\u01b0\u1ee3c l\u00e0m s\u1ea1ch c\u1ee7a s\u01a1 \u0111\u1ed3.<\/li>\n
        • 3. Vi\u1ebft ki\u1ec3m th\u1eed:<\/strong> S\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 \u0111\u1ec3 t\u1ea1o c\u00e1c tr\u01b0\u1eddng h\u1ee3p ki\u1ec3m th\u1eed. M\u1ed7i nh\u00e1nh trong s\u01a1 \u0111\u1ed3 ph\u1ea3i t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed9t tr\u01b0\u1eddng h\u1ee3p ki\u1ec3m th\u1eed.<\/li>\n
        • 4. Ch\u1ea1y song song:<\/strong> N\u1ebfu c\u00f3 th\u1ec3, \u0111\u1ecbnh tuy\u1ebfn l\u01b0u l\u01b0\u1ee3ng \u0111\u1ebfn c\u1ea3 h\u1ec7 th\u1ed1ng c\u0169 v\u00e0 m\u1edbi. So s\u00e1nh \u0111\u1ea7u ra.<\/li>\n
        • 5. Chuy\u1ec3n \u0111\u1ed5i:<\/strong> Sau khi x\u00e1c minh, chuy\u1ec3n \u0111i\u1ec3m v\u00e0o h\u1ec7 th\u1ed1ng m\u1edbi.<\/li>\n<\/ul>\n

          C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y an to\u00e0n h\u01a1n so v\u1edbi th\u1eed v\u00e0 sai. N\u1ebfu m\u00e3 m\u1edbi th\u1ea5t b\u1ea1i, s\u01a1 \u0111\u1ed3 s\u1ebd cho th\u1ea5y ch\u00ednh x\u00e1c n\u01a1i logic \u0111\u00e3 l\u1ec7ch kh\u1ecfi lu\u1ed3ng mong \u0111\u1ee3i.<\/p>\n

          \u26a0\ufe0f Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch tr\u00e1nh ch\u00fang<\/h2>\n

          Ngay c\u1ea3 khi c\u00f3 k\u1ebf ho\u1ea1ch, t\u00e1i c\u1ea5u tr\u00fac h\u1ec7 th\u1ed1ng c\u0169 v\u1eabn ti\u1ec1m \u1ea9n nhi\u1ec1u r\u1ee7i ro. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng b\u1eaby ph\u1ed5 bi\u1ebfn v\u00e0 c\u00e1ch v\u01b0\u1ee3t qua ch\u00fang.<\/p>\n

          T\u1ea7m nguy 1: V\u1ebd qu\u00e1 nhi\u1ec1u s\u01a1 \u0111\u1ed3<\/h3>\n

          Vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 cho t\u1eebng h\u00e0m ri\u00eang l\u1ebb c\u00f3 th\u1ec3 l\u00e0m qu\u00e1 t\u1ea3i \u0111\u1ed9i ng\u0169. \u0110i\u1ec1u n\u00e0y t\u1ed1n th\u1eddi gian v\u00e0 t\u1ea1o ra g\u00e1nh n\u1eb7ng b\u1ea3o tr\u00ec cho ch\u00ednh t\u00e0i li\u1ec7u.<\/p>\n

            \n
          • Gi\u1ea3i ph\u00e1p:<\/strong>\u00c1p d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p t\u1eeb tr\u00ean xu\u1ed1ng. V\u1ebd s\u01a1 \u0111\u1ed3 c\u1ea5p h\u1ec7 th\u1ed1ng tr\u01b0\u1edbc, sau \u0111\u00f3 m\u1edbi \u0111i s\u00e2u v\u00e0o c\u00e1c module c\u1ee5 th\u1ec3 khi th\u1ef1c s\u1ef1 c\u1ea7n thi\u1ebft.<\/li>\n<\/ul>\n

            T\u1ea7m nguy 2: B\u1ecf qua tr\u1ea1ng th\u00e1i<\/h3>\n

            S\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng t\u1eadp trung v\u00e0o lu\u1ed3ng, nh\u01b0ng tr\u1ea1ng th\u00e1i l\u1ea1i quan tr\u1ecdng. M\u1ed9t h\u00e0m c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o bi\u1ebfn to\u00e0n c\u1ee5c ho\u1eb7c tr\u1ea1ng th\u00e1i c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/p>\n

              \n
            • Gi\u1ea3i ph\u00e1p:<\/strong>S\u1eed d\u1ee5ng c\u00e1c \u0111\u01b0\u1eddng d\u00f2ng d\u1eef li\u1ec7u \u0111\u1ec3 th\u1ec3 hi\u1ec7n d\u1eef li\u1ec7u \u0111i qua gi\u1eefa c\u00e1c ho\u1ea1t \u0111\u1ed9ng. Ghi ch\u00fa c\u00e1c n\u00fat v\u1edbi \u0111i\u1ec1u ki\u1ec7n ti\u1ec1n v\u00e0 \u0111i\u1ec1u ki\u1ec7n h\u1eadu.<\/li>\n<\/ul>\n

              T\u1ea7m nguy 3: Kh\u00f4ng c\u1eadp nh\u1eadt<\/h3>\n

              M\u1ed9t s\u01a1 \u0111\u1ed3 ch\u1ec9 t\u1ed1t b\u1eb1ng \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a n\u00f3. N\u1ebfu m\u00e3 ngu\u1ed3n thay \u0111\u1ed5i nh\u01b0ng s\u01a1 \u0111\u1ed3 kh\u00f4ng c\u1eadp nh\u1eadt, n\u00f3 s\u1ebd tr\u1edf th\u00e0nh t\u00e0i li\u1ec7u g\u00e2y hi\u1ec3u l\u1ea7m.<\/p>\n

                \n
              • Gi\u1ea3i ph\u00e1p:<\/strong>Xem s\u01a1 \u0111\u1ed3 nh\u01b0 m\u00e3 ngu\u1ed3n. Ki\u1ec3m tra ch\u00fang trong qu\u00e1 tr\u00ecnh y\u00eau c\u1ea7u h\u1ee3p nh\u1ea5t. N\u1ebfu logic thay \u0111\u1ed5i, s\u01a1 \u0111\u1ed3 ph\u1ea3i thay \u0111\u1ed5i theo.<\/li>\n<\/ul>\n

                \ud83d\udcc8 \u0110o l\u01b0\u1eddng th\u00e0nh c\u00f4ng<\/h2>\n

                L\u00e0m sao b\u1ea1n bi\u1ebft vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a \u0111\u00e3 th\u00e0nh c\u00f4ng? C\u00e1c ch\u1ec9 s\u1ed1 s\u1ebd cung c\u1ea5p c\u00e2u tr\u1ea3 l\u1eddi. S\u1ef1 r\u00f5 r\u00e0ng tr\u1ef1c quan c\u1ea7n chuy\u1ec3n h\u00f3a th\u00e0nh nh\u1eefng c\u1ea3i thi\u1ec7n th\u1ef1c t\u1ebf v\u1ec1 t\u1ed1c \u0111\u1ed9 ph\u00e1t tri\u1ec3n v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh h\u1ec7 th\u1ed1ng.<\/p>\n

                  \n
                • \u0110\u1ed9 ph\u1ee9c t\u1ea1p m\u00e3 ngu\u1ed3n:<\/strong>S\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 \u0111o \u0111\u1ed9 ph\u1ee9c t\u1ea1p v\u00f2ng l\u1eb7p. M\u00e3 ngu\u1ed3n \u0111\u00e3 t\u1ed1i \u01b0u h\u00f3a c\u1ea7n th\u1ec3 hi\u1ec7n \u0111i\u1ec3m s\u1ed1 \u0111\u1ed9 ph\u1ee9c t\u1ea1p th\u1ea5p h\u01a1n so v\u1edbi phi\u00ean b\u1ea3n c\u0169.<\/li>\n
                • Ph\u1ea1m vi ki\u1ec3m th\u1eed:<\/strong>V\u1edbi s\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng \u0111\u1ea7y \u0111\u1ee7, b\u1ea1n c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c c\u00e1c nh\u00e1nh ch\u01b0a \u0111\u01b0\u1ee3c ki\u1ec3m th\u1eed. Nh\u1eafm \u0111\u1ebfn 100% bao ph\u1ee7 \u0111\u01b0\u1eddng \u0111i tr\u00ean c\u00e1c lu\u1ed3ng quan tr\u1ecdng.<\/li>\n
                • Th\u1eddi gian trung b\u00ecnh ph\u1ee5c h\u1ed3i (MTTR):<\/strong>N\u1ebfu x\u1ea3y ra l\u1ed7i, s\u01a1 \u0111\u1ed3 c\u00f3 gi\u00fap b\u1ea1n t\u00ecm ra nhanh h\u01a1n kh\u00f4ng? Th\u1eddi gian g\u1ee1 l\u1ed7i gi\u1ea3m cho th\u1ea5y s\u1ef1 r\u00f5 r\u00e0ng t\u1ed1t h\u01a1n.<\/li>\n
                • Th\u1eddi gian l\u00e0m quen:<\/strong>C\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n m\u1edbi n\u00ean hi\u1ec3u logic h\u1ec7 th\u1ed1ng nhanh h\u01a1n khi s\u01a1 \u0111\u1ed3 c\u00f3 s\u1eb5n.<\/li>\n<\/ul>\n

                  \ud83d\udd04 T\u00edch h\u1ee3p s\u01a1 \u0111\u1ed3 v\u00e0o CI\/CD<\/h2>\n

                  T\u00e0i li\u1ec7u th\u01b0\u1eddng n\u1eb1m trong m\u1ed9t wiki v\u00e0 b\u1ecb b\u1ecf qua. \u0110\u1ec3 s\u01a1 \u0111\u1ed3 tr\u1edf n\u00ean h\u1eefu \u00edch, ch\u00fang ph\u1ea3i l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a quy tr\u00ecnh x\u00e2y d\u1ef1ng. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o ch\u00fang lu\u00f4n \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt.<\/p>\n

                    \n
                  • T\u1ef1 \u0111\u1ed9ng h\u00f3a t\u1ea1o s\u01a1 \u0111\u1ed3:<\/strong>S\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 c\u00f3 th\u1ec3 t\u1ea1o s\u01a1 \u0111\u1ed3 t\u1eeb c\u00e1c ch\u00fa th\u00edch m\u00e3 ngu\u1ed3n ho\u1eb7c c\u00e2y c\u00fa ph\u00e1p tr\u1eebu t\u01b0\u1ee3ng. \u0110i\u1ec1u n\u00e0y gi\u00fap bi\u1ec3u di\u1ec5n tr\u1ef1c quan lu\u00f4n \u0111\u1ed3ng b\u1ed9 v\u1edbi ngu\u1ed3n g\u1ed1c.<\/li>\n
                  • Ki\u1ec3m tra x\u00e1c th\u1ef1c:<\/strong>T\u00edch h\u1ee3p m\u1ed9t b\u01b0\u1edbc trong pipeline CI\/CD \u0111\u1ec3 ki\u1ec3m tra s\u1ef1 thay \u0111\u1ed5i s\u01a1 \u0111\u1ed3. N\u1ebfu m\u00e3 ngu\u1ed3n thay \u0111\u1ed5i nh\u01b0ng s\u01a1 \u0111\u1ed3 kh\u00f4ng thay \u0111\u1ed5i, qu\u00e1 tr\u00ecnh x\u00e2y d\u1ef1ng s\u1ebd th\u1ea5t b\u1ea1i.<\/li>\n
                  • Suy gi\u1ea3m tr\u1ef1c quan:<\/strong>L\u01b0u tr\u1eef c\u00e1c s\u01a1 \u0111\u1ed3 tham chi\u1ebfu trong ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n. So s\u00e1nh \u0111\u1ea7u ra s\u01a1 \u0111\u1ed3 m\u1edbi v\u1edbi b\u1ea3n g\u1ed1c \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u1ef1 l\u1ec7ch logic.<\/li>\n<\/ul>\n

                    T\u1ef1 \u0111\u1ed9ng h\u00f3a n\u00e0y lo\u1ea1i b\u1ecf g\u00e1nh n\u1eb7ng b\u1ea3o tr\u00ec th\u1ee7 c\u00f4ng. H\u1ec7 th\u1ed1ng th\u1ef1c thi c\u00e1c ti\u00eau chu\u1ea9n t\u00e0i li\u1ec7u ri\u00eang c\u1ee7a n\u00f3.<\/p>\n

                    \ud83e\udde9 X\u1eed l\u00fd t\u00ednh \u0111\u1ed3ng th\u1eddi v\u00e0 song song<\/h2>\n

                    C\u00e1c h\u1ec7 th\u1ed1ng c\u0169 th\u01b0\u1eddng ph\u1ee5 thu\u1ed9c v\u00e0o \u0111a lu\u1ed3ng \u0111\u1ec3 x\u1eed l\u00fd hi\u1ec7u su\u1ea5t. Tuy nhi\u00ean, t\u00ednh \u0111\u1ed3ng th\u1eddi n\u1ed5i ti\u1ebfng l\u00e0 r\u1ea5t kh\u00f3 hi\u1ec3u. M\u00e3 tu\u1ea7n t\u1ef1 l\u00e0 tuy\u1ebfn t\u00ednh; m\u00e3 \u0111\u1ed3ng th\u1eddi l\u00e0 m\u1ed9t m\u1ea1ng l\u01b0\u1edbi.<\/p>\n

                    S\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng UML x\u1eed l\u00fd \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ngN\u00fat ph\u00e2n nh\u00e1nh v\u00e0 h\u1ee3p nh\u1ea5t<\/strong> c\u00e1c n\u00fat.<\/p>\n

                      \n
                    • N\u00fat ph\u00e2n nh\u00e1nh:<\/strong> Chia lu\u1ed3ng \u0111i\u1ec1u khi\u1ec3n th\u00e0nh nhi\u1ec1u lu\u1ed3ng \u0111\u1ed3ng th\u1eddi.<\/li>\n
                    • N\u00fat h\u1ee3p nh\u1ea5t:<\/strong> Ch\u1edd t\u1ea5t c\u1ea3 c\u00e1c lu\u1ed3ng \u0111\u1ea7u v\u00e0o ho\u00e0n th\u00e0nh tr\u01b0\u1edbc khi ti\u1ebfp t\u1ee5c.<\/li>\n<\/ul>\n

                      Khi t\u00e1i c\u1ea5u tr\u00fac, h\u00e3y \u0111\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 c\u1ee7a b\u1ea1n m\u00f4 t\u1ea3 ch\u00ednh x\u00e1c s\u1ef1 \u0111\u1ed3ng b\u1ed9 h\u00f3a. N\u1ebfu h\u1ec7 th\u1ed1ng c\u0169 s\u1eed d\u1ee5ng mutex, s\u01a1 \u0111\u1ed3 ph\u1ea3i ph\u1ea3n \u00e1nh r\u1eb1ng m\u1ed9t lu\u1ed3ng b\u1ecb ch\u1eb7n cho \u0111\u1ebfn khi t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng. D\u1ea5u hi\u1ec7u tr\u1ef1c quan n\u00e0y gi\u00fap ph\u00e1t hi\u1ec7n c\u00e1c t\u00ecnh hu\u1ed1ng ch\u1ebft m\u00e1y ti\u1ec1m \u1ea9n tr\u01b0\u1edbc khi ch\u00fang x\u1ea3y ra trong m\u00f4i tr\u01b0\u1eddng s\u1ea3n xu\u1ea5t.<\/p>\n

                      H\u00e3y xem x\u00e9t m\u1ed9t t\u00ecnh hu\u1ed1ng m\u00e0 qu\u00e1 tr\u00ecnh t\u1ea1o b\u00e1o c\u00e1o kh\u1edfi t\u1ea1o nhi\u1ec1u lu\u1ed3ng l\u00e0m vi\u1ec7c \u0111\u1ec3 t\u00ednh to\u00e1n c\u00e1c ph\u1ea7n kh\u00e1c nhau c\u1ee7a m\u1ed9t t\u1eadp d\u1eef li\u1ec7u.<\/p>\n

                        \n
                      1. Lu\u1ed3ng ch\u00ednh ph\u00e2n nh\u00e1nh th\u00e0nh ba ho\u1ea1t \u0111\u1ed9ng song song.<\/li>\n
                      2. M\u1ed7i ho\u1ea1t \u0111\u1ed9ng x\u1eed l\u00fd m\u1ed9t t\u1eadp con d\u1eef li\u1ec7u.<\/li>\n
                      3. Ch\u00fang h\u1ee3p nh\u1ea5t t\u1ea1i m\u1ed9t n\u00fat h\u1ee3p nh\u1ea5t.<\/li>\n
                      4. Ho\u1ea1t \u0111\u1ed9ng cu\u1ed1i c\u00f9ng t\u1ed5ng h\u1ee3p c\u00e1c k\u1ebft qu\u1ea3.<\/li>\n<\/ol>\n

                        N\u1ebfu b\u1ea1n t\u00e1i c\u1ea5u tr\u00fac \u0111i\u1ec1u n\u00e0y, b\u1ea1n ph\u1ea3i b\u1ea3o to\u00e0n logic h\u1ee3p nh\u1ea5t. N\u1ebfu b\u1ea1n lo\u1ea1i b\u1ecf n\u00fat h\u1ee3p nh\u1ea5t, b\u00e1o c\u00e1o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1eedi tr\u01b0\u1edbc khi t\u1ea5t c\u1ea3 d\u1eef li\u1ec7u s\u1eb5n s\u00e0ng. S\u01a1 \u0111\u1ed3 l\u00e0m r\u00f5 y\u00eau c\u1ea7u n\u00e0y.<\/p>\n

                        \ud83d\udcdd Nh\u1eefng suy ngh\u0129 cu\u1ed1i c\u00f9ng v\u1ec1 hi\u1ec7n \u0111\u1ea1i h\u00f3a h\u1ec7 th\u1ed1ng<\/h2>\n

                        T\u00e1i c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n c\u0169 l\u00e0 m\u1ed9t kho\u1ea3n \u0111\u1ea7u t\u01b0 d\u00e0i h\u1ea1n. N\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 v\u1ec1 c\u00e1c gi\u1ea3i ph\u00e1p nhanh hay v\u00e1 c\u00e1c l\u1ed7 h\u1ed5ng. \u0110\u00f3 l\u00e0 vi\u1ec7c x\u00e2y d\u1ef1ng l\u1ea1i n\u1ec1n t\u1ea3ng \u0111\u1ec3 c\u1ea5u tr\u00fac c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 s\u1ef1 ph\u00e1t tri\u1ec3n trong t\u01b0\u01a1ng lai.<\/p>\n

                        S\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng UML cung c\u1ea5p c\u00e2y c\u1ea7u gi\u1eefa th\u1ef1c t\u1ebf c\u0169 v\u00e0 thi\u1ebft k\u1ebf m\u1edbi. Ch\u00fang bu\u1ed9c \u0111\u1ed9i ng\u0169 ph\u1ea3i \u0111\u1ed1i di\u1ec7n v\u1edbi logic th\u1ef1c t\u1ebf c\u1ee7a h\u1ec7 th\u1ed1ng, thay v\u00ec nh\u1eefng gi\u1ea3 \u0111\u1ecbnh c\u1ee7a h\u1ecd v\u1ec1 n\u00f3.<\/p>\n

                        B\u1eb1ng c\u00e1ch tu\u00e2n theo m\u1ed9t quy tr\u00ecnh nghi\u00eam ng\u1eb7t, c\u00e1c \u0111\u1ed9i c\u00f3 th\u1ec3 gi\u1ea3m n\u1ee3 k\u1ef9 thu\u1eadt m\u00e0 kh\u00f4ng l\u00e0m ph\u00e1t sinh l\u1ed7i m\u1edbi. S\u1ef1 h\u1ed7n lo\u1ea1n c\u1ee7a qu\u00e1 kh\u1ee9 tr\u1edf th\u00e0nh s\u1ef1 r\u00f5 r\u00e0ng c\u1ee7a t\u01b0\u01a1ng lai.<\/p>\n

                        B\u1eaft \u0111\u1ea7u nh\u1ecf. Ch\u1ecdn m\u1ed9t module. V\u1ebd s\u01a1 \u0111\u1ed3. T\u00e1i c\u1ea5u tr\u00fac lu\u1ed3ng. X\u00e1c minh k\u1ebft qu\u1ea3. L\u1eb7p l\u1ea1i. C\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 h\u1ec7 th\u1ed1ng n\u00e0y x\u00e2y d\u1ef1ng s\u1ef1 t\u1ef1 tin v\u00e0 \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng duy tr\u00ec \u1ed5n \u0111\u1ecbnh trong su\u1ed1t qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i.<\/p>\n","protected":false},"excerpt":{"rendered":"

                        M\u1ed7i h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m \u0111\u1ec1u mang theo m\u1ed9t l\u1ecbch s\u1eed. \ud83d\udcdc Trong nhi\u1ec1u n\u0103m, y\u00eau c\u1ea7u thay \u0111\u1ed5i, t\u00ednh n\u0103ng t\u00edch l\u0169y v\u00e0 c\u00e1c b\u1ea3n v\u00e1 ch\u1ed3ng ch\u1ea5t l\u00ean…<\/p>\n","protected":false},"author":1,"featured_media":605,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"T\u00e1i c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n c\u0169 b\u1eb1ng s\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng UML","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng UML \u0111\u1ec3 tr\u1ef1c quan h\u00f3a logic c\u0169, gi\u1ea3m n\u1ee3 k\u1ef9 thu\u1eadt v\u00e0 t\u00e1i c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n m\u1ed9t c\u00e1ch t\u1ef1 tin. M\u1ed9t h\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt to\u00e0n di\u1ec7n.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[13],"tags":[39,44],"class_list":["post-604","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language","tag-academic","tag-activity-diagram"],"yoast_head":"\nT\u00e1i c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n c\u0169 b\u1eb1ng s\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng UML<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1ch s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 ho\u1ea1t \u0111\u1ed9ng UML \u0111\u1ec3 tr\u1ef1c quan h\u00f3a logic c\u0169, gi\u1ea3m n\u1ee3 k\u1ef9 thu\u1eadt v\u00e0 t\u00e1i c\u1ea5u tr\u00fac m\u00e3 ngu\u1ed3n m\u1ed9t c\u00e1ch t\u1ef1 tin. 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