{"id":4083,"date":"2026-03-27T15:28:06","date_gmt":"2026-03-27T07:28:06","guid":{"rendered":"https:\/\/www.go2posts.com\/vn\/package-diagram-overview-for-beginners\/"},"modified":"2026-03-27T15:28:06","modified_gmt":"2026-03-27T07:28:06","slug":"package-diagram-overview-for-beginners","status":"publish","type":"post","link":"https:\/\/www.go2posts.com\/vn\/package-diagram-overview-for-beginners\/","title":{"rendered":"S\u01a1 \u0111\u1ed3 G\u00f3i: T\u1ed5ng quan to\u00e0n di\u1ec7n d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u"},"content":{"rendered":"

S\u01a1 \u0111\u1ed3 G\u00f3i \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u00f4ng c\u1ee5 n\u1ec1n t\u1ea3ng trong ki\u1ebfn tr\u00fac c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m ph\u1ee9c t\u1ea1p. N\u00f3 cung c\u1ea5p c\u00e1i nh\u00ecn t\u1ed5ng quan v\u1ec1 c\u00e1ch c\u00e1c ph\u1ea7n kh\u00e1c nhau c\u1ee7a h\u1ec7 th\u1ed1ng t\u01b0\u01a1ng t\u00e1c, t\u1ed5 ch\u1ee9c v\u00e0 ph\u1ee5 thu\u1ed9c l\u1eabn nhau. \u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi m\u1edbi l\u00e0m quen v\u1edbi m\u00f4 h\u00ecnh h\u00f3a ph\u1ea7n m\u1ec1m, vi\u1ec7c hi\u1ec3u r\u00f5 lo\u1ea1i s\u01a1 \u0111\u1ed3 n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 duy tr\u00ec c\u00e1c c\u01a1 s\u1edf m\u00e3 c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 d\u1ec5 qu\u1ea3n l\u00fd. H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1c kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i, c\u00e1c th\u00e0nh ph\u1ea7n c\u1ea5u tr\u00fac v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n c\u1ee7a S\u01a1 \u0111\u1ed3 G\u00f3i m\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c c\u00f4ng c\u1ee5 th\u01b0\u01a1ng m\u1ea1i c\u1ee5 th\u1ec3.<\/p>\n

\n
\"Whimsical<\/figure>\n<\/div>\n

\ud83e\udd14 S\u01a1 \u0111\u1ed3 G\u00f3i l\u00e0 g\u00ec?<\/h2>\n

Trong ng\u1eef c\u1ea3nh c\u1ee7a Ng\u00f4n ng\u1eef M\u00f4 h\u00ecnh h\u00f3a Th\u1ed1ng nh\u1ea5t (UML), S\u01a1 \u0111\u1ed3 G\u00f3i l\u00e0 m\u1ed9t s\u01a1 \u0111\u1ed3 c\u1ea5u tr\u00fac t\u1ed5 ch\u1ee9c c\u00e1c ph\u1ea7n t\u1eed th\u00e0nh c\u00e1c nh\u00f3m g\u1ecdi l\u00e0 g\u00f3i. H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng n\u00f3 nh\u01b0 m\u1ed9t h\u1ec7 th\u1ed1ng t\u1ec7p cho ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m c\u1ee7a b\u1ea1n. T\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1c th\u01b0 m\u1ee5c tr\u00ean \u1ed5 c\u1ee9ng m\u00e1y t\u00ednh nh\u00f3m c\u00e1c t\u1ec7p li\u00ean quan l\u1ea1i v\u1edbi nhau \u0111\u1ec3 gi\u1eef cho m\u1ecdi th\u1ee9 ng\u0103n n\u1eafp, c\u00e1c g\u00f3i nh\u00f3m c\u00e1c l\u1edbp, giao di\u1ec7n v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n kh\u00e1c c\u00f3 li\u00ean quan l\u1ea1i v\u1edbi nhau.<\/p>\n

    \n
  • Qu\u1ea3n l\u00fd kh\u00f4ng gian t\u00ean:<\/strong>C\u00e1c g\u00f3i cung c\u1ea5p m\u1ed9t kh\u00f4ng gian t\u00ean, ng\u0103n ng\u1eeba xung \u0111\u1ed9t t\u00ean gi\u1eefa c\u00e1c ph\u1ea7n kh\u00e1c nhau c\u1ee7a h\u1ec7 th\u1ed1ng.<\/li>\n
  • Nh\u00f3m logic:<\/strong>Ch\u00fang cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n h\u00ecnh dung c\u1ea5u tr\u00fac logic c\u1ee7a h\u1ec7 th\u1ed1ng thay v\u00ec c\u00e1ch tri\u1ec3n khai v\u1eadt l\u00fd c\u1ee7a n\u00f3.<\/li>\n
  • Tr\u1eebu t\u01b0\u1ee3ng h\u00f3a:<\/strong>Ch\u00fang \u1ea9n c\u00e1c chi ti\u1ebft b\u00ean trong c\u1ee7a m\u1ed9t m\u00f4-\u0111un, ch\u1ec9 hi\u1ec3n th\u1ecb nh\u1eefng g\u00ec c\u1ea7n thi\u1ebft cho t\u01b0\u01a1ng t\u00e1c b\u00ean ngo\u00e0i.<\/li>\n<\/ul>\n

    Khi b\u1ea1n \u0111ang thi\u1ebft k\u1ebf m\u1ed9t \u1ee9ng d\u1ee5ng l\u1edbn, c\u01a1 s\u1edf m\u00e3 c\u00f3 th\u1ec3 nhanh ch\u00f3ng tr\u1edf n\u00ean qu\u00e1 t\u1ea3i. S\u01a1 \u0111\u1ed3 G\u00f3i gi\u00fap b\u1ea1n l\u00f9i l\u1ea1i m\u1ed9t b\u01b0\u1edbc \u0111\u1ec3 nh\u00ecn th\u1ea5y c\u1ea3 khu r\u1eebng thay v\u00ec ch\u1ec9 t\u1eebng c\u00e1i c\u00e2y. N\u00f3 kh\u00f4ng ph\u1ea3i v\u1ec1 vi\u1ec7c v\u1ebd t\u1eebng d\u00f2ng m\u00e3; m\u00e0 l\u00e0 v\u1ec1 vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c ranh gi\u1edbi v\u00e0 m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c khu v\u1ef1c ch\u1ee9c n\u0103ng ch\u00ednh.<\/p>\n

    \ud83e\uddf1 C\u00e1c th\u00e0nh ph\u1ea7n c\u1ed1t l\u00f5i c\u1ee7a S\u01a1 \u0111\u1ed3 G\u00f3i<\/h2>\n

    Hi\u1ec3u r\u00f5 c\u00e1c kh\u1ed1i x\u00e2y d\u1ef1ng l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean \u0111\u1ec3 t\u1ea1o ra c\u00e1c s\u01a1 \u0111\u1ed3 hi\u1ec7u qu\u1ea3. C\u00e1c ph\u1ea7n t\u1eed n\u00e0y ph\u1ed1i h\u1ee3p v\u1edbi nhau \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac c\u1ee7a h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n.<\/p>\n

    1. C\u00e1c g\u00f3i<\/h3>\n

    Ph\u1ea7n t\u1eed ch\u00ednh l\u00e0 b\u1ea3n th\u00e2n g\u00f3i. N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng bi\u1ec3u t\u01b0\u1ee3ng th\u01b0 m\u1ee5c c\u00f3 th\u1ebb. B\u00ean trong m\u1ed9t g\u00f3i, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1eb7t:<\/p>\n

      \n
    • L\u1edbp<\/li>\n
    • Giao di\u1ec7n<\/li>\n
    • C\u00e1c g\u00f3i kh\u00e1c (g\u00f3i con)<\/li>\n
    • Th\u00e0nh ph\u1ea7n<\/li>\n
    • N\u00fat<\/li>\n<\/ul>\n

      M\u1ed7i g\u00f3i n\u00ean c\u00f3 m\u1ed9t t\u00ean r\u00f5 r\u00e0ng ph\u1ea3n \u00e1nh tr\u00e1ch nhi\u1ec7m c\u1ee7a n\u00f3. V\u00ed d\u1ee5, trong m\u1ed9t h\u1ec7 th\u1ed1ng th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y c\u00e1c g\u00f3i \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean l\u00e0X\u1eed l\u00fd \u0111\u01a1n h\u00e0ng<\/code>, Qu\u1ea3n l\u00fd ng\u01b0\u1eddi d\u00f9ng<\/code>, v\u00e0C\u1ed5ng thanh to\u00e1n<\/code>.<\/p>\n

      2. Giao di\u1ec7n<\/h3>\n

      Giao di\u1ec7n x\u00e1c \u0111\u1ecbnh m\u1ed9t h\u1ee3p \u0111\u1ed3ng. Ch\u00fang quy \u0111\u1ecbnh c\u00e1c thao t\u00e1c m\u00e0 m\u1ed9t g\u00f3i ho\u1eb7c l\u1edbp c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n m\u00e0 kh\u00f4ng ti\u1ebft l\u1ed9 c\u00e1ch c\u00e1c thao t\u00e1c \u0111\u00f3 \u0111\u01b0\u1ee3c tri\u1ec3n khai. Trong S\u01a1 \u0111\u1ed3 G\u00f3i, c\u00e1c giao di\u1ec7n l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 t\u00e1ch r\u1eddi c\u00e1c h\u1ec7 th\u1ed1ng. Ch\u00fang cho ph\u00e9p m\u1ed9t g\u00f3i ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t giao di\u1ec7n thay v\u00ec m\u1ed9t tri\u1ec3n khai c\u1ee5 th\u1ec3, gi\u00fap h\u1ec7 th\u1ed1ng linh ho\u1ea1t h\u01a1n tr\u01b0\u1edbc c\u00e1c thay \u0111\u1ed5i.<\/p>\n

      3. C\u00e1c ki\u1ec3u (Stereotypes)<\/h3>\n

      C\u00e1c stereotyped m\u1edf r\u1ed9ng t\u1eeb v\u1ef1ng c\u1ee7a UML. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n lo\u1ea1i m\u1ed9t lo\u1ea1i ph\u1ea7n t\u1eed m\u00f4 h\u00ecnh c\u1ee5 th\u1ec3. C\u00e1c stereotype ph\u1ed5 bi\u1ebfn trong s\u01a1 \u0111\u1ed3 g\u00f3i bao g\u1ed3m:<\/p>\n

        \n
      • <<namespace>><\/strong>: Ch\u1ec9 ra m\u1ed9t g\u00f3i ch\u1ee9a c\u00e1c ph\u1ea7n t\u1eed kh\u00e1c.<\/li>\n
      • <<subsystem>><\/strong>: Ch\u1ec9 ra m\u1ed9t ph\u1ea7n ri\u00eang bi\u1ec7t c\u1ee7a h\u1ec7 th\u1ed1ng v\u1edbi h\u00e0nh vi ri\u00eang c\u1ee7a n\u00f3.<\/li>\n
      • <<boundary>><\/strong>: \u0110\u1ea1i di\u1ec7n cho giao di\u1ec7n gi\u1eefa h\u1ec7 th\u1ed1ng v\u00e0 th\u1ebf gi\u1edbi b\u00ean ngo\u00e0i.<\/li>\n<\/ul>\n

        \ud83d\udd17 C\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 s\u1ef1 ph\u1ee5 thu\u1ed9c<\/h2>\n

        S\u1ee9c m\u1ea1nh c\u1ee7a m\u1ed9t S\u01a1 \u0111\u1ed3 G\u00f3i n\u1eb1m \u1edf c\u00e1ch n\u00f3 k\u1ebft n\u1ed1i c\u00e1c g\u00f3i n\u00e0y. C\u00e1c m\u1ed1i quan h\u1ec7 x\u00e1c \u0111\u1ecbnh d\u00f2ng ch\u1ea3y th\u00f4ng tin v\u00e0 \u0111i\u1ec1u khi\u1ec3n gi\u1eefa c\u00e1c ph\u1ea7n kh\u00e1c nhau c\u1ee7a h\u1ec7 th\u1ed1ng. Vi\u1ec7c qu\u1ea3n l\u00fd k\u00e9m c\u00e1c k\u1ebft n\u1ed1i n\u00e0y l\u00e0 m\u1ed9t ngu\u1ed3n ph\u1ed5 bi\u1ebfn c\u1ee7a n\u1ee3 k\u1ef9 thu\u1eadt.<\/p>\n

        S\u1ef1 ph\u1ee5 thu\u1ed9c<\/h3>\n

        \u0110\u00e2y l\u00e0 m\u1ed1i quan h\u1ec7 ph\u1ed5 bi\u1ebfn nh\u1ea5t. N\u00f3 ch\u1ec9 ra r\u1eb1ng m\u1ed9t g\u00f3i s\u1eed d\u1ee5ng ho\u1eb7c d\u1ef1a v\u00e0o m\u1ed9t g\u00f3i kh\u00e1c. N\u1ebfu g\u00f3i \u0111\u00edch thay \u0111\u1ed5i, g\u00f3i ngu\u1ed3n c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng. C\u00e1c s\u1ef1 ph\u1ee5 thu\u1ed9c th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng m\u1ed9t m\u0169i t\u00ean \u0111\u1ee9t n\u00e9t ch\u1ec9 t\u1eeb ngu\u1ed3n \u0111\u1ebfn \u0111\u00edch.<\/p>\n

          \n
        • Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng:<\/strong> G\u00f3i ReportGenerator<\/code> ph\u1ee5 thu\u1ed9c v\u00e0o g\u00f3i DataExtractor<\/code> \u0111\u1ec3 l\u1ea5y th\u00f4ng tin.<\/li>\n
        • H\u1ec7 qu\u1ea3:<\/strong> S\u1ed1 l\u01b0\u1ee3ng ph\u1ee5 thu\u1ed9c cao l\u00e0m t\u0103ng nguy c\u01a1 x\u1ea3y ra hi\u1ec7u \u1ee9ng d\u00e2y chuy\u1ec1n trong qu\u00e1 tr\u00ecnh b\u1ea3o tr\u00ec.<\/li>\n<\/ul>\n

          Li\u00ean k\u1ebft<\/h3>\n

          M\u1ed9t li\u00ean k\u1ebft \u0111\u1ea1i di\u1ec7n cho m\u1ed9t m\u1ed1i quan h\u1ec7 c\u1ea5u tr\u00fac gi\u1eefa c\u00e1c g\u00f3i. N\u00f3 ng\u1ee5 \u00fd m\u1ed9t k\u1ebft n\u1ed1i m\u1ea1nh m\u1ebd h\u01a1n so v\u1edbi s\u1ef1 ph\u1ee5 thu\u1ed9c. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t g\u00f3i gi\u1eef m\u1ed9t tham chi\u1ebfu \u0111\u1ebfn g\u00f3i kh\u00e1c nh\u01b0 m\u1ed9t thu\u1ed9c t\u00ednh v\u0129nh vi\u1ec5n.<\/p>\n

          T\u1ed5ng qu\u00e1t h\u00f3a<\/h3>\n

          C\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 th\u1eeba k\u1ebf, m\u1ed1i quan h\u1ec7 n\u00e0y ch\u1ec9 ra r\u1eb1ng m\u1ed9t g\u00f3i l\u00e0 m\u1ed9t phi\u00ean b\u1ea3n chuy\u00ean bi\u1ec7t c\u1ee7a m\u1ed9t g\u00f3i kh\u00e1c. \u0110i\u1ec1u n\u00e0y \u00edt ph\u1ed5 bi\u1ebfn \u1edf c\u1ea5p \u0111\u1ed9 g\u00f3i nh\u01b0ng c\u00f3 th\u1ec3 x\u1ea3y ra khi x\u00e1c \u0111\u1ecbnh m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng con.<\/p>\n

          Hi\u1ec7n th\u1ef1c h\u00f3a<\/h3>\n

          Hi\u1ec7n th\u1ef1c h\u00f3a x\u1ea3y ra khi m\u1ed9t g\u00f3i th\u1ef1c hi\u1ec7n m\u1ed9t giao di\u1ec7n \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a b\u1edfi m\u1ed9t g\u00f3i kh\u00e1c. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng m\u1ed9t \u0111\u01b0\u1eddng \u0111\u1ee9t n\u00e9t v\u00e0 m\u1ed9t m\u0169i t\u00ean tam gi\u00e1c r\u1ed7ng.<\/p>\n

          C\u00e1c lo\u1ea1i ph\u1ee5 thu\u1ed9c<\/h3>\n

          Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c s\u1ef1 ph\u1ee5 thu\u1ed9c \u0111\u1ec1u \u0111\u01b0\u1ee3c t\u1ea1o ra nh\u01b0 nhau. Vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c s\u1eafc th\u00e1i gi\u00fap duy tr\u00ec m\u1ed9t ki\u1ebfn tr\u00fac l\u00e0nh m\u1ea1nh.<\/p>\n\n\n\n\n\n\n\n\n
          Lo\u1ea1i ph\u1ee5 thu\u1ed9c<\/th>\nM\u00f4 t\u1ea3<\/th>\nV\u00ed d\u1ee5<\/th>\n<\/tr>\n<\/thead>\n
          S\u1eed d\u1ee5ng<\/td>\nM\u1ed1i quan h\u1ec7 s\u1eed d\u1ee5ng \u0111\u01a1n gi\u1ea3n trong \u0111\u00f3 m\u1ed9t ph\u1ea7n t\u1eed g\u1ecdi m\u1ed9t ph\u1ea7n t\u1eed kh\u00e1c.<\/td>\nG\u1ecdi m\u1ed9t h\u00e0m trong m\u1ed9t g\u00f3i kh\u00e1c.<\/td>\n<\/tr>\n
          Nh\u1eadp<\/td>\nC\u00e1c ph\u1ea7n t\u1eed c\u00f4ng khai c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c nh\u00ecn th\u1ea5y trong g\u00f3i \u0111ang nh\u1eadp.<\/td>\nNh\u1eadp m\u1ed9t th\u01b0 vi\u1ec7n c\u00e1c ti\u1ec7n \u00edch.<\/td>\n<\/tr>\n
          Truy c\u1eadp<\/td>\nTruy c\u1eadp c\u00e1c ph\u1ea7n t\u1eed ri\u00eang t\u01b0 ho\u1eb7c \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 (hi\u1ebfm g\u1eb7p trong thi\u1ebft k\u1ebf c\u1ea5p cao).<\/td>\nC\u00e1c c\u01a1 ch\u1ebf g\u1ee1 l\u1ed7i n\u1ed9i b\u1ed9.<\/td>\n<\/tr>\n
          Kh\u1edfi t\u1ea1o<\/td>\nM\u1ed9t g\u00f3i t\u1ea1o c\u00e1c th\u1ec3 hi\u1ec7n c\u1ee7a c\u00e1c l\u1edbp trong m\u1ed9t g\u00f3i kh\u00e1c.<\/td>\nTri\u1ec3n khai m\u1eabu nh\u00e0 m\u00e1y.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          \ud83c\udfd7\ufe0f Nguy\u00ean t\u1eafc ki\u1ebfn tr\u00fac: S\u1ef1 g\u1eafn k\u1ebft v\u00e0 S\u1ef1 li\u00ean k\u1ebft<\/h2>\n

          M\u1ed9t bi\u1ec3u \u0111\u1ed3 g\u00f3i \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng t\u1ed1t l\u00e0 s\u1ef1 ph\u1ea3n \u00e1nh tr\u1ef1c ti\u1ebfp c\u1ee7a c\u00e1c nguy\u00ean t\u1eafc k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m v\u1eefng ch\u1eafc. Hai kh\u00e1i ni\u1ec7m n\u1ed5i b\u1eadt h\u01a1n c\u1ea3 l\u00e0: S\u1ef1 g\u1eafn k\u1ebft v\u00e0 S\u1ef1 li\u00ean k\u1ebft.<\/p>\n

          S\u1ef1 g\u1eafn k\u1ebft<\/h3>\n

          S\u1ef1 g\u1eafn k\u1ebft \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 ph\u1ee5 thu\u1ed9c l\u1eabn nhau gi\u1eefa c\u00e1c m\u00f4-\u0111un ph\u1ea7n m\u1ec1m. Trong ng\u1eef c\u1ea3nh c\u1ee7a bi\u1ec3u \u0111\u1ed3 g\u00f3i, b\u1ea1n mu\u1ed1n gi\u1ea3m thi\u1ec3u s\u1ef1 g\u1eafn k\u1ebft. S\u1ef1 g\u1eafn k\u1ebft ch\u1eb7t ch\u1ebd c\u00f3 ngh\u0129a l\u00e0 nh\u1eefng thay \u0111\u1ed5i trong m\u1ed9t g\u00f3i s\u1ebd c\u00f3 kh\u1ea3 n\u0103ng l\u00e0m h\u1ecfng ho\u1eb7c y\u00eau c\u1ea7u thay \u0111\u1ed5i trong m\u1ed9t g\u00f3i kh\u00e1c. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra s\u1ef1 mong manh.<\/p>\n

            \n
          • G\u1eafn k\u1ebft l\u1ecfng l\u1ebbo:<\/strong>C\u00e1c g\u00f3i t\u01b0\u01a1ng t\u00e1c th\u00f4ng qua c\u00e1c giao di\u1ec7n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng. Ch\u00fang bi\u1ebft r\u1ea5t \u00edt v\u1ec1 c\u00e1ch tri\u1ec3n khai n\u1ed9i b\u1ed9 c\u1ee7a nhau.<\/li>\n
          • G\u1eafn k\u1ebft cao:<\/strong>C\u00e1c g\u00f3i chia s\u1ebb c\u1ea5u tr\u00fac d\u1eef li\u1ec7u ho\u1eb7c ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c chi ti\u1ebft n\u1ed9i b\u1ed9 c\u1ee7a c\u00e1c g\u00f3i kh\u00e1c. \u0110i\u1ec1u n\u00e0y kh\u00f3 duy tr\u00ec.<\/li>\n<\/ul>\n

            S\u1ef1 li\u00ean k\u1ebft<\/h3>\n

            S\u1ef1 li\u00ean k\u1ebft \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 li\u00ean quan ch\u1eb7t ch\u1ebd gi\u1eefa c\u00e1c tr\u00e1ch nhi\u1ec7m c\u1ee7a m\u1ed9t g\u00f3i duy nh\u1ea5t. S\u1ef1 li\u00ean k\u1ebft cao c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t g\u00f3i l\u00e0m m\u1ed9t vi\u1ec7c v\u00e0 l\u00e0m n\u00f3 t\u1ed1t. S\u1ef1 li\u00ean k\u1ebft th\u1ea5p c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t g\u00f3i c\u1ed1 g\u1eafng l\u00e0m qu\u00e1 nhi\u1ec1u vi\u1ec7c kh\u00f4ng li\u00ean quan.<\/p>\n

              \n
            • Li\u00ean k\u1ebft ch\u1ee9c n\u0103ng:<\/strong>T\u1ea5t c\u1ea3 c\u00e1c ph\u1ea7n t\u1eed trong g\u00f3i \u0111\u1ec1u \u0111\u00f3ng g\u00f3p v\u00e0o m\u1ed9t m\u1ee5c \u0111\u00edch duy nh\u1ea5t v\u00e0 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng.<\/li>\n
            • Li\u00ean k\u1ebft ng\u1eabu nhi\u00ean:<\/strong>C\u00e1c ph\u1ea7n t\u1eed \u0111\u01b0\u1ee3c nh\u00f3m l\u1ea1i m\u1ed9t c\u00e1ch t\u00f9y ti\u1ec7n. \u0110\u00e2y l\u00e0 h\u00ecnh th\u1ee9c li\u00ean k\u1ebft th\u1ea5p nh\u1ea5t v\u00e0 n\u00ean \u0111\u01b0\u1ee3c tr\u00e1nh.<\/li>\n<\/ul>\n

              Khi v\u1ebd bi\u1ec3u \u0111\u1ed3 c\u1ee7a b\u1ea1n, h\u00e3y h\u01b0\u1edbng t\u1edbi c\u00e1c g\u00f3i c\u00f3 s\u1ef1 li\u00ean k\u1ebft cao v\u00e0 s\u1ef1 g\u1eafn k\u1ebft l\u1ecfng l\u1ebbo. S\u1ef1 t\u00e1ch bi\u1ec7t n\u00e0y cho ph\u00e9p c\u00e1c nh\u00f3m l\u00e0m vi\u1ec7c tr\u00ean c\u00e1c ph\u1ea7n kh\u00e1c nhau c\u1ee7a h\u1ec7 th\u1ed1ng v\u1edbi \u00edt xung \u0111\u1ed9t nh\u1ea5t.<\/p>\n

              \ud83d\udcd0 Ti\u00eau chu\u1ea9n k\u00fd hi\u1ec7u tr\u1ef1c quan<\/h2>\n

              M\u1eb7c d\u00f9 c\u00e1c c\u00f4ng c\u1ee5 c\u1ee5 th\u1ec3 c\u00f3 th\u1ec3 kh\u00e1c nhau m\u1ed9t ch\u00fat, nh\u01b0ng ng\u00f4n ng\u1eef tr\u1ef1c quan c\u1ee7a c\u00e1c bi\u1ec3u \u0111\u1ed3 g\u00f3i tu\u00e2n theo c\u00e1c quy \u01b0\u1edbc UML ti\u00eau chu\u1ea9n. Tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea5t k\u1ef3 ai \u0111\u1ecdc bi\u1ec3u \u0111\u1ed3 \u0111\u1ec1u hi\u1ec3u \u0111\u01b0\u1ee3c \u00fd \u0111\u1ecbnh.<\/p>\n

                \n
              • Bi\u1ec3u t\u01b0\u1ee3ng th\u01b0 m\u1ee5c:<\/strong>Bi\u1ec3u di\u1ec5n ti\u00eau chu\u1ea9n cho m\u1ed9t g\u00f3i. N\u00f3 th\u01b0\u1eddng c\u00f3 m\u1ed9t tab nh\u1ecf \u1edf g\u00f3c tr\u00ean b\u00ean tr\u00e1i.<\/li>\n
              • V\u1ecb tr\u00ed nh\u00e3n:<\/strong>T\u00ean g\u00f3i \u0111\u01b0\u1ee3c \u0111\u1eb7t b\u00ean trong th\u01b0 m\u1ee5c. N\u1ebfu g\u00f3i ch\u1ee9a nhi\u1ec1u th\u00e0nh ph\u1ea7n, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ch\u1ebf \u0111\u1ed9 xem c\u00f3 tab.<\/li>\n
              • Ki\u1ec3u \u0111\u01b0\u1eddng:<\/strong>\n
                  \n
                • \u0110\u01b0\u1eddng li\u1ec1n th\u01b0\u1eddng bi\u1ec3u di\u1ec5n c\u00e1c quan h\u1ec7 li\u00ean k\u1ebft ho\u1eb7c t\u1ed5ng qu\u00e1t h\u00f3a.<\/li>\n
                • \u0110\u01b0\u1eddng \u0111\u1ee9t \u0111o\u1ea1n bi\u1ec3u di\u1ec5n c\u00e1c ph\u1ee5 thu\u1ed9c ho\u1eb7c giao di\u1ec7n.<\/li>\n
                • \u0110\u1ea7u m\u0169i t\u00ean ch\u1ec9 h\u01b0\u1edbng.<\/li>\n<\/ul>\n<\/li>\n
                • Ch\u1ec9 b\u00e1o kh\u1ea3 n\u0103ng hi\u1ec3n th\u1ecb:<\/strong>\n
                    \n
                  • +<\/strong>: C\u00f4ng khai (c\u00f3 th\u1ec3 truy c\u1eadp t\u1eeb b\u1ea5t k\u1ef3 \u0111\u00e2u).<\/li>\n
                  • \u2013<\/strong>: Ri\u00eang t\u01b0 (ch\u1ec9 c\u00f3 th\u1ec3 truy c\u1eadp b\u00ean trong g\u00f3i).<\/li>\n
                  • #<\/strong>: B\u1ea3o v\u1ec7 (c\u00f3 th\u1ec3 truy c\u1eadp b\u00ean trong g\u00f3i v\u00e0 c\u00e1c l\u1edbp con).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

                    \ud83d\udcc5 Khi n\u00e0o s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 g\u00f3i<\/h2>\n

                    Kh\u00f4ng ph\u1ea3i d\u1ef1 \u00e1n n\u00e0o c\u0169ng c\u1ea7n s\u01a1 \u0111\u1ed3 g\u00f3i. Ch\u00fang c\u00f3 gi\u00e1 tr\u1ecb nh\u1ea5t khi \u0111\u1ed9 ph\u1ee9c t\u1ea1p t\u0103ng l\u00ean. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3 m\u00e0 ch\u00fang tr\u1edf n\u00ean thi\u1ebft y\u1ebfu.<\/p>\n

                    1. H\u1ec7 th\u1ed1ng quy m\u00f4 l\u1edbn<\/h3>\n

                    Khi m\u1ed9t h\u1ec7 th\u1ed1ng c\u00f3 h\u00e0ng tr\u0103m l\u1edbp, vi\u1ec7c \u0111i\u1ec1u h\u01b0\u1edbng m\u00e3 ngu\u1ed3n tr\u1edf n\u00ean b\u1ea5t kh\u1ea3 thi n\u1ebfu kh\u00f4ng c\u00f3 b\u1ea3n \u0111\u1ed3. S\u01a1 \u0111\u1ed3 g\u00f3i cung c\u1ea5p c\u00e1i nh\u00ecn t\u1ed5ng quan c\u1ea7n thi\u1ebft \u0111\u1ec3 nhanh ch\u00f3ng \u0111\u1ecbnh v\u1ecb ch\u1ee9c n\u0103ng.<\/p>\n

                    2. D\u1ef1 \u00e1n t\u00e1i c\u1ea5u tr\u00fac<\/h3>\n

                    N\u1ebfu b\u1ea1n \u0111ang di chuy\u1ec3n m\u00e3 t\u1eeb ph\u1ea7n n\u00e0y c\u1ee7a h\u1ec7 th\u1ed1ng sang ph\u1ea7n kh\u00e1c, s\u01a1 \u0111\u1ed3 g\u00f3i gi\u00fap b\u1ea1n hi\u1ec3u t\u00e1c \u0111\u1ed9ng. B\u1ea1n c\u00f3 th\u1ec3 h\u00ecnh dung nh\u1eefng g\u00f3i n\u00e0o kh\u00e1c s\u1ebd b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi vi\u1ec7c di chuy\u1ec3n n\u00e0y tr\u01b0\u1edbc khi vi\u1ebft m\u1ed9t d\u00f2ng m\u00e3.<\/p>\n

                    3. Ti\u1ebfp nh\u1eadn l\u1eadp tr\u00ecnh vi\u00ean m\u1edbi<\/h3>\n

                    C\u00e1c th\u00e0nh vi\u00ean m\u1edbi trong nh\u00f3m th\u01b0\u1eddng g\u1eb7p kh\u00f3 kh\u0103n trong vi\u1ec7c hi\u1ec3u c\u1ea5u tr\u00fac d\u1ef1 \u00e1n. S\u01a1 \u0111\u1ed3 g\u00f3i \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t b\u1ea3n \u0111\u1ed3 \u0111\u01b0\u1eddng \u0111i, gi\u1ea3i th\u00edch c\u00e1ch c\u00e1c m\u00f4-\u0111un li\u00ean quan \u0111\u1ebfn nhau m\u00e0 kh\u00f4ng b\u1eaft bu\u1ed9c h\u1ecd ph\u1ea3i \u0111\u1ecdc m\u00e3 ngay l\u1eadp t\u1ee9c.<\/p>\n

                    4. Ki\u1ebfn tr\u00fac vi d\u1ecbch v\u1ee5<\/h3>\n

                    Trong c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n, c\u00e1c g\u00f3i th\u01b0\u1eddng \u00e1nh x\u1ea1 \u0111\u1ebfn c\u00e1c vi d\u1ecbch v\u1ee5. Vi\u1ec7c tr\u1ef1c quan h\u00f3a c\u00e1c ranh gi\u1edbi n\u00e0y gi\u00fap hi\u1ec3u r\u00f5 lu\u1ed3ng d\u1eef li\u1ec7u v\u00e0 s\u1ef1 ph\u1ee5 thu\u1ed9c gi\u1eefa c\u00e1c d\u1ecbch v\u1ee5 tr\u00ean m\u1ea1ng.<\/p>\n

                    \ud83d\udee0\ufe0f X\u00e2y d\u1ef1ng s\u01a1 \u0111\u1ed3 g\u00f3i: T\u1eebng b\u01b0\u1edbc m\u1ed9t<\/h2>\n

                    Vi\u1ec7c t\u1ea1o s\u01a1 \u0111\u1ed3 l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh l\u1eb7p l\u1ea1i. \u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 vi\u1ec7c b\u1ea1n l\u00e0m m\u1ed9t l\u1ea7n r\u1ed3i qu\u00ean. H\u00e3y l\u00e0m theo c\u00e1c b\u01b0\u1edbc sau \u0111\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t m\u00f4 h\u00ecnh v\u1eefng ch\u1eafc.<\/p>\n

                    B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh ranh gi\u1edbi<\/h3>\n

                    B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch li\u1ec7t k\u00ea c\u00e1c khu v\u1ef1c ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a h\u1ec7 th\u1ed1ng. H\u00e3y t\u1ef1 h\u1ecfi: \u201cNh\u1eefng kh\u1ea3 n\u0103ng ch\u00ednh m\u00e0 h\u1ec7 th\u1ed1ng n\u00e0y cung c\u1ea5p l\u00e0 g\u00ec?\u201d Nh\u1eefng kh\u1ea3 n\u0103ng n\u00e0y s\u1ebd tr\u1edf th\u00e0nh c\u00e1c g\u00f3i \u1ee9ng vi\u00ean. \u0110\u1eebng lo l\u1eafng v\u1ec1 vi\u1ec7c qu\u00e1 chi ti\u1ebft \u1edf giai \u0111o\u1ea1n n\u00e0y.<\/p>\n

                    B\u01b0\u1edbc 2: Nh\u00f3m c\u00e1c th\u00e0nh ph\u1ea7n<\/h3>\n

                    G\u00e1n c\u00e1c l\u1edbp v\u00e0 th\u00e0nh ph\u1ea7n c\u1ee7a b\u1ea1n v\u00e0o c\u00e1c g\u00f3i n\u00e0y. N\u1ebfu m\u1ed9t l\u1edbp ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec1u g\u00f3i, h\u00e3y ch\u1ecdn g\u00f3i m\u00e0 n\u00f3 n\u1eb1m \u1edf trung t\u00e2m v\u1ec1 m\u1eb7t logic nh\u1ea5t. N\u1ebfu m\u1ed9t l\u1edbp thu\u1ed9c v\u1ec1 m\u1ed9t h\u1ec7 th\u1ed1ng con, h\u00e3y t\u1ea1o m\u1ed9t g\u00f3i con.<\/p>\n

                    B\u01b0\u1edbc 3: X\u00e1c \u0111\u1ecbnh c\u00e1c giao di\u1ec7n<\/h3>\n

                    Tr\u01b0\u1edbc khi v\u1ebd c\u00e1c \u0111\u01b0\u1eddng n\u1ed1i gi\u1eefa c\u00e1c g\u00f3i, h\u00e3y x\u00e1c \u0111\u1ecbnh c\u00e1c giao di\u1ec7n m\u00e0 ch\u00fang cung c\u1ea5p. G\u00f3i A c\u1ea7n y\u00eau c\u1ea7u G\u00f3i B th\u1ef1c hi\u1ec7n nh\u1eefng g\u00ec? H\u00e3y t\u00e0i li\u1ec7u h\u00f3a c\u00e1c h\u1ee3p \u0111\u1ed3ng n\u00e0y. B\u01b0\u1edbc n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c ph\u1ee5 thu\u1ed9c d\u1ef1a tr\u00ean c\u00e1c tr\u1eebu t\u01b0\u1ee3ng h\u00f3a, kh\u00f4ng ph\u1ea3i tr\u00ean c\u00e1c tri\u1ec3n khai c\u1ee5 th\u1ec3.<\/p>\n

                    B\u01b0\u1edbc 4: L\u1eadp b\u1ea3n \u0111\u1ed3 c\u00e1c ph\u1ee5 thu\u1ed9c<\/h3>\n

                    V\u1ebd c\u00e1c \u0111\u01b0\u1eddng n\u1ed1i gi\u1eefa c\u00e1c g\u00f3i. H\u00e3y trung th\u1ef1c v\u1ec1 h\u01b0\u1edbng. Li\u1ec7u A g\u1ecdi B, hay B g\u1ecdi A? \u0110\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c m\u0169i t\u00ean ch\u1ec9 theo h\u01b0\u1edbng s\u1eed d\u1ee5ng (t\u1eeb ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn nh\u00e0 cung c\u1ea5p).<\/p>\n

                    B\u01b0\u1edbc 5: Xem x\u00e9t v\u00e0 tinh ch\u1ec9nh<\/h3>\n

                    Ki\u1ec3m tra c\u00e1c ph\u1ee5 thu\u1ed9c v\u00f2ng l\u1eb7p. M\u1ed9t g\u00f3i kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t g\u00f3i kh\u00e1c m\u00e0 l\u1ea1i ph\u1ee5 thu\u1ed9c v\u00e0o ch\u00ednh n\u00f3. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra m\u1ed9t chu k\u1ef3 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn l\u1ed7i kh\u1edfi t\u1ea1o v\u00e0 deadlock logic. N\u1ebfu t\u1ed3n t\u1ea1i chu k\u1ef3, h\u00e3y \u0111\u01b0a ra m\u1ed9t giao di\u1ec7n trung gian ho\u1eb7c ph\u00e1 v\u1ee1 m\u1ed1i quan h\u1ec7 \u0111\u00f3.<\/p>\n

                    \u26a0\ufe0f Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ea7n tr\u00e1nh<\/h2>\n

                    Ngay c\u1ea3 c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 gi\u00e0u kinh nghi\u1ec7m c\u0169ng m\u1eafc sai l\u1ea7m. Vi\u1ec7c nh\u1eadn th\u1ee9c \u0111\u01b0\u1ee3c c\u00e1c l\u1ed7i ph\u1ed5 bi\u1ebfn c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n ti\u1ebft ki\u1ec7m \u0111\u00e1ng k\u1ec3 th\u1eddi gian v\u1ec1 sau.<\/p>\n

                    1. Ph\u1ee5 thu\u1ed9c ki\u1ec3u m\u00ec \u1ed1ng<\/h3>\n

                    Khi c\u00e1c g\u00f3i \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i theo c\u1ea5u tr\u00fac gi\u1ed1ng nh\u01b0 m\u1ea1ng l\u01b0\u1edbi m\u00e0 kh\u00f4ng c\u00f3 ph\u00e2n c\u1ea5p r\u00f5 r\u00e0ng, n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t “ki\u1ebfn tr\u00fac ki\u1ec3u m\u00ec \u1ed1ng”. \u0110i\u1ec1u n\u00e0y khi\u1ebfn vi\u1ec7c x\u00e1c \u0111\u1ecbnh n\u01a1i m\u1ed9t thay \u0111\u1ed5i s\u1ebd lan truy\u1ec1n tr\u1edf n\u00ean kh\u00f3 kh\u0103n. H\u00e3y h\u01b0\u1edbng t\u1edbi m\u1ed9t c\u1ea5u tr\u00fac ph\u00e2n t\u1ea7ng ho\u1eb7c ph\u00e2n c\u1ea5p.<\/p>\n

                    2. Ph\u00e2n c\u1ea5p qu\u00e1 m\u1ee9c<\/h3>\n

                    Vi\u1ec7c t\u1ea1o qu\u00e1 nhi\u1ec1u c\u1ea5p g\u00f3i con c\u00f3 th\u1ec3 khi\u1ebfn bi\u1ec3u \u0111\u1ed3 tr\u1edf n\u00ean r\u1ed1i r\u1eafm. M\u1ed9t t\u00ean g\u00f3i nh\u01b0 “Root.Sub1.Sub2.Sub3<\/code>” r\u1ea5t kh\u00f3 nh\u1edb. H\u00e3y gi\u1eef \u0111\u1ed9 s\u00e2u ph\u00e2n c\u1ea5p n\u00f4ng. N\u1ebfu b\u1ea1n c\u1ea7n nh\u00f3m nhi\u1ec1u h\u01a1n, h\u00e3y \u0111\u1ed5i t\u00ean g\u00f3i thay v\u00ec ph\u00e2n c\u1ea5p s\u00e2u h\u01a1n.<\/p>\n

                    3. B\u1ecf qua t\u00ednh kh\u1ea3 ki\u1ebfn<\/h3>\n

                    \u0110\u00e1nh d\u1ea5u m\u1ecdi th\u1ee9 l\u00e0 c\u00f4ng khai t\u1ea1o ra m\u1ed9t c\u1ea5u tr\u00fac l\u1ecfng l\u1ebbo n\u01a1i b\u1ea5t k\u1ef3 g\u00f3i n\u00e0o c\u0169ng c\u00f3 th\u1ec3 truy c\u1eadp b\u1ea5t k\u1ef3 l\u1edbp n\u00e0o. \u0110i\u1ec1u n\u00e0y d\u1eabn \u0111\u1ebfn s\u1ef1 g\u1eafn k\u1ebft ch\u1eb7t ch\u1ebd. H\u00e3y th\u1ef1c thi c\u00e1c quy t\u1eafc kh\u1ea3 ki\u1ebfn nghi\u00eam ng\u1eb7t. C\u00e1c ph\u1ea7n t\u1eed ri\u00eang t\u01b0 ph\u1ea3i v\u1eabn gi\u1eef t\u00ednh ri\u00eang t\u01b0 trong g\u00f3i c\u1ee7a ch\u00fang.<\/p>\n

                    4. Tr\u1ed9n l\u1eabn c\u00e1c m\u1ed1i quan t\u00e2m<\/h3>\n

                    \u0110\u1eebng \u0111\u1eb7t m\u00e3 truy c\u1eadp c\u01a1 s\u1edf d\u1eef li\u1ec7u trong c\u00f9ng m\u1ed9t g\u00f3i v\u1edbi logic giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng. \u0110i\u1ec1u n\u00e0y vi ph\u1ea1m Nguy\u00ean t\u1eafc Tr\u00e1ch nhi\u1ec7m \u0110\u01a1n nh\u1ea5t. H\u00e3y nh\u00f3m theo m\u1ed1i quan t\u00e2m (v\u00ed d\u1ee5: “H\u1ea1 t\u1ea7ng<\/code>, L\u0129nh v\u1ef1c<\/code>, Tr\u00ecnh b\u00e0y\"<\/code>).<\/p>\n

                    \ud83d\udcca So s\u00e1nh: G\u00f3i so v\u1edbi c\u00e1c bi\u1ec3u \u0111\u1ed3 kh\u00e1c<\/h2>\n

                    D\u1ec5 nh\u1ea7m l\u1eabn gi\u1eefa Bi\u1ec3u \u0111\u1ed3 G\u00f3i v\u1edbi Bi\u1ec3u \u0111\u1ed3 L\u1edbp ho\u1eb7c Bi\u1ec3u \u0111\u1ed3 Th\u00e0nh ph\u1ea7n. Hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 s\u1eed d\u1ee5ng \u0111\u00fang c\u00f4ng c\u1ee5 cho c\u00f4ng vi\u1ec7c.<\/p>\n\n\n\n\n\n\n\n\n
                    Lo\u1ea1i bi\u1ec3u \u0111\u1ed3<\/th>\nTr\u1ecdng t\u00e2m<\/th>\nPh\u00f9 h\u1ee3p nh\u1ea5t cho<\/th>\n<\/tr>\n<\/thead>\n
                    Bi\u1ec3u \u0111\u1ed3 G\u00f3i<\/td>\nNh\u00f3m logic v\u00e0 kh\u00f4ng gian t\u00ean.<\/td>\nC\u1ea5u tr\u00fac v\u00e0 t\u1ed5 ch\u1ee9c h\u1ec7 th\u1ed1ng \u1edf m\u1ee9c cao.<\/td>\n<\/tr>\n
                    Bi\u1ec3u \u0111\u1ed3 l\u1edbp<\/td>\nThu\u1ed9c t\u00ednh v\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u1ee7a c\u00e1c l\u1edbp.<\/td>\nThi\u1ebft k\u1ebf h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng chi ti\u1ebft v\u00e0 c\u1ea5u tr\u00fac d\u1eef li\u1ec7u.<\/td>\n<\/tr>\n
                    Bi\u1ec3u \u0111\u1ed3 th\u00e0nh ph\u1ea7n<\/td>\nC\u00e1c \u0111\u01a1n v\u1ecb th\u1ef1c thi v\u1eadt l\u00fd.<\/td>\nC\u1ea5u tr\u00fac tri\u1ec3n khai v\u00e0 t\u1ec7p th\u1ef1c thi.<\/td>\n<\/tr>\n
                    Bi\u1ec3u \u0111\u1ed3 tr\u00ecnh t\u1ef1<\/td>\nT\u01b0\u01a1ng t\u00e1c theo th\u1eddi gian.<\/td>\nHi\u1ec3u c\u00e1c quy tr\u00ecnh l\u00e0m vi\u1ec7c c\u1ee5 th\u1ec3 v\u00e0 lu\u1ed3ng th\u00f4ng \u0111i\u1ec7p.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                    S\u1eed d\u1ee5ng Bi\u1ec3u \u0111\u1ed3 g\u00f3i khi c\u1ea7n gi\u1ea3i th\u00edch t\u1ed5 ch\u1ee9c. S\u1eed d\u1ee5ng Bi\u1ec3u \u0111\u1ed3 l\u1edbp khi c\u1ea7n gi\u1ea3i th\u00edch d\u1eef li\u1ec7u. S\u1eed d\u1ee5ng Bi\u1ec3u \u0111\u1ed3 th\u00e0nh ph\u1ea7n khi c\u1ea7n gi\u1ea3i th\u00edch quy tr\u00ecnh x\u00e2y d\u1ef1ng.<\/p>\n

                    \ud83d\ude80 Ch\u1ee7 \u0111\u1ec1 n\u00e2ng cao<\/h2>\n

                    Khi b\u1ea1n \u0111\u00e3 quen thu\u1ed9c h\u01a1n v\u1edbi c\u00e1c kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n, b\u1ea1n c\u00f3 th\u1ec3 kh\u00e1m ph\u00e1 c\u00e1c kh\u00e1i ni\u1ec7m n\u00e2ng cao \u0111\u1ec3 tinh ch\u1ec9nh kh\u1ea3 n\u0103ng m\u00f4 h\u00ecnh h\u00f3a c\u1ee7a m\u00ecnh.<\/p>\n

                    1. Ph\u1ee5 thu\u1ed9c v\u00f2ng<\/h3>\n

                    M\u1ed9t ph\u1ee5 thu\u1ed9c v\u00f2ng x\u1ea3y ra khi G\u00f3i A ph\u1ee5 thu\u1ed9c v\u00e0o G\u00f3i B, v\u00e0 G\u00f3i B ph\u1ee5 thu\u1ed9c v\u00e0o G\u00f3i A. \u0110\u00e2y th\u01b0\u1eddng l\u00e0 d\u1ea5u hi\u1ec7u c\u1ee7a thi\u1ebft k\u1ebf k\u00e9m. \u0110\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3:<\/p>\n

                      \n
                    • T\u00e1ch m\u1ed9t giao di\u1ec7n d\u00f9ng chung v\u00e0o m\u1ed9t g\u00f3i th\u1ee9 ba.<\/li>\n
                    • T\u00e1i c\u1ea5u tr\u00fac m\u00e3 \u0111\u1ec3 gi\u1ea3m nhu c\u1ea7u t\u01b0\u01a1ng t\u00e1c.<\/li>\n
                    • S\u1eed d\u1ee5ng ti\u00eam ph\u1ee5 thu\u1ed9c \u0111\u1ec3 ph\u00e1 v\u1ee1 li\u00ean k\u1ebft th\u1eddi gian bi\u00ean d\u1ecbch.<\/li>\n<\/ul>\n

                      2. T\u1eadp h\u1ee3p v\u00e0 t\u1ed5 h\u1ee3p<\/h3>\n

                      M\u1eb7c d\u00f9 ph\u1ed5 bi\u1ebfn h\u01a1n trong Bi\u1ec3u \u0111\u1ed3 l\u1edbp, c\u00e1c kh\u00e1i ni\u1ec7m n\u00e0y c\u0169ng \u00e1p d\u1ee5ng cho c\u00e1c g\u00f3i. T\u1ed5 h\u1ee3p ng\u1ee5 \u00fd m\u1ed1i quan h\u1ec7 s\u1edf h\u1eefu m\u1ea1nh m\u1ebd h\u01a1n. N\u1ebfu m\u1ed9t g\u00f3i \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb m\u1ed9t g\u00f3i kh\u00e1c, g\u00f3i con kh\u00f4ng th\u1ec3 t\u1ed3n t\u1ea1i n\u1ebfu kh\u00f4ng c\u00f3 g\u00f3i cha. T\u1eadp h\u1ee3p ng\u1ee5 \u00fd m\u1ed1i quan h\u1ec7 y\u1ebfu h\u01a1n, n\u01a1i g\u00f3i con c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i \u0111\u1ed9c l\u1eadp.<\/p>\n

                      3. T\u00edch h\u1ee3p t\u00e0i li\u1ec7u<\/h3>\n

                      C\u00e1c c\u00f4ng c\u1ee5 m\u00f4 h\u00ecnh h\u00f3a hi\u1ec7n \u0111\u1ea1i cho ph\u00e9p b\u1ea1n nh\u00fang t\u00e0i li\u1ec7u tr\u1ef1c ti\u1ebfp v\u00e0o bi\u1ec3u \u0111\u1ed3 g\u00f3i. B\u1ea1n c\u00f3 th\u1ec3 th\u00eam ghi ch\u00fa m\u00f4 t\u1ea3 m\u1ee5c \u0111\u00edch c\u1ee7a m\u1ed9t g\u00f3i, t\u00e1c gi\u1ea3 c\u1ee7a n\u00f3 ho\u1eb7c l\u1ecbch s\u1eed phi\u00ean b\u1ea3n. \u0110i\u1ec1u n\u00e0y bi\u1ebfn bi\u1ec3u \u0111\u1ed3 th\u00e0nh m\u1ed9t t\u00e0i li\u1ec7u s\u1ed1ng \u0111\u1ed9ng.<\/p>\n

                      \u2753 C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n

                      H: T\u00f4i c\u00f3 c\u1ea7n bi\u1ec3u \u0111\u1ed3 g\u00f3i cho m\u1ed9t d\u1ef1 \u00e1n nh\u1ecf kh\u00f4ng?<\/h3>\n

                      \u0110\u1ed1i v\u1edbi c\u00e1c d\u1ef1 \u00e1n nh\u1ecf c\u00f3 \u00edt h\u01a1n 50 l\u1edbp, bi\u1ec3u \u0111\u1ed3 g\u00f3i c\u00f3 th\u1ec3 l\u00e0 qu\u00e1 m\u1ee9c c\u1ea7n thi\u1ebft. C\u1ea5u tr\u00fac m\u00e3 th\u01b0\u1eddng \u0111\u00e3 r\u00f5 r\u00e0ng. Tuy nhi\u00ean, n\u1ebfu b\u1ea1n d\u1ef1 ki\u1ebfn s\u1ef1 ph\u00e1t tri\u1ec3n, vi\u1ec7c t\u1ea1o bi\u1ec3u \u0111\u1ed3 s\u1edbm c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m th\u1eddi gian sau n\u00e0y.<\/p>\n

                      H: Bi\u1ec3u \u0111\u1ed3 g\u00f3i c\u00f3 th\u1ec3 thay \u0111\u1ed5i theo th\u1eddi gian kh\u00f4ng?<\/h3>\n

                      C\u00f3, ch\u1eafc ch\u1eafn. Khi h\u1ec7 th\u1ed1ng ph\u00e1t tri\u1ec3n, c\u00e1c g\u00f3i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c h\u1ee3p nh\u1ea5t, t\u00e1ch ra ho\u1eb7c \u0111\u1ed5i t\u00ean. Bi\u1ec3u \u0111\u1ed3 n\u00ean \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt m\u1ed7i khi ki\u1ebfn tr\u00fac thay \u0111\u1ed5i. M\u1ed9t bi\u1ec3u \u0111\u1ed3 l\u1ed7i th\u1eddi c\u00f2n t\u1ec7 h\u01a1n l\u00e0 kh\u00f4ng c\u00f3 bi\u1ec3u \u0111\u1ed3 n\u00e0o c\u1ea3.<\/p>\n

                      H: T\u00f4i x\u1eed l\u00fd m\u00e3 c\u0169 nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n

                      Khi t\u00e0i li\u1ec7u h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng c\u0169, h\u00e3y b\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch c\u1ea5u tr\u00fac t\u1ec7p hi\u1ec7n c\u00f3. T\u1ea1o c\u00e1c g\u00f3i d\u1ef1a tr\u00ean c\u00e1ch m\u00e3 \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c hi\u1ec7n t\u1ea1i, sau \u0111\u00f3 x\u00e1c \u0111\u1ecbnh c\u00e1c khu v\u1ef1c c\u1ea7n t\u00e1i c\u1ea5u tr\u00fac. S\u1eed d\u1ee5ng bi\u1ec3u \u0111\u1ed3 nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5 \u0111\u1ec3 l\u1eadp k\u1ebf ho\u1ea1ch di chuy\u1ec3n.<\/p>\n

                      Q: C\u00f3 b\u1eaft bu\u1ed9c ph\u1ea3i d\u00f9ng UML \u0111\u1ec3 s\u1eed d\u1ee5ng Bi\u1ec3u \u0111\u1ed3 G\u00f3i kh\u00f4ng?<\/h3>\n

                      M\u1eb7c d\u00f9 UML l\u00e0 ti\u00eau chu\u1ea9n, nh\u01b0ng kh\u00e1i ni\u1ec7m nh\u00f3m v\u00e0 \u00e1nh x\u1ea1 c\u00e1c ph\u1ee5 thu\u1ed9c t\u1ed3n t\u1ea1i \u0111\u1ed9c l\u1eadp. B\u1ea1n c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1c nguy\u00ean t\u1eafc n\u00e0y trong b\u1ea5t k\u1ef3 m\u00f4i tr\u01b0\u1eddng m\u00f4 h\u00ecnh h\u00f3a n\u00e0o, ngay c\u1ea3 khi b\u1ea1n kh\u00f4ng tu\u00e2n th\u1ee7 ch\u1eb7t ch\u1ebd c\u00fa ph\u00e1p UML.<\/p>\n

                      \ud83d\udcdd T\u00f3m t\u1eaft c\u00e1c Th\u1ef1c h\u00e0nh T\u1ed1t nh\u1ea5t<\/h2>\n

                      \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o Bi\u1ec3u \u0111\u1ed3 G\u00f3i c\u1ee7a b\u1ea1n lu\u00f4n h\u1eefu \u00edch trong su\u1ed1t v\u00f2ng \u0111\u1eddi d\u1ef1 \u00e1n, h\u00e3y tu\u00e2n th\u1ee7 danh s\u00e1ch ki\u1ec3m tra sau:<\/p>\n

                        \n
                      • Gi\u1eef \u1edf m\u1ee9c \u0111\u1ed9 cao:<\/strong>Tr\u00e1nh l\u00e0m r\u1ed1i bi\u1ec3u \u0111\u1ed3 b\u1eb1ng c\u00e1ch th\u00eam t\u1eebng ph\u01b0\u01a1ng th\u1ee9c ho\u1eb7c thu\u1ed9c t\u00ednh ri\u00eang l\u1ebb.<\/li>\n
                      • S\u1eed d\u1ee5ng t\u00ean r\u00f5 r\u00e0ng:<\/strong>T\u00ean g\u00f3i ph\u1ea3i mang t\u00ednh m\u00f4 t\u1ea3 v\u00e0 nh\u1ea5t qu\u00e1n.<\/li>\n
                      • Gi\u1ea3m thi\u1ec3u c\u00e1c ph\u1ee5 thu\u1ed9c:<\/strong>H\u01b0\u1edbng t\u1edbi c\u1ea5u tr\u00fac d\u1ea1ng sao ho\u1eb7c ph\u00e2n t\u1ea7ng thay v\u00ec d\u1ea1ng l\u01b0\u1edbi.<\/li>\n
                      • Tu\u00e2n th\u1ee7 c\u00e1c giao di\u1ec7n:<\/strong>Ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c tr\u1eeb t\u01b0\u1ee3ng h\u00f3a, kh\u00f4ng ph\u1ea3i c\u00e1c l\u1edbp c\u1ee5 th\u1ec3.<\/li>\n
                      • C\u1eadp nh\u1eadt th\u01b0\u1eddng xuy\u00ean:<\/strong>Xem bi\u1ec3u \u0111\u1ed3 nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a quy tr\u00ecnh r\u00e0 so\u00e1t m\u00e3.<\/li>\n
                      • Ki\u1ec3m tra c\u00e1c chu tr\u00ecnh:<\/strong>\u0110\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 s\u1ef1 ph\u1ee5 thu\u1ed9c v\u00f2ng gi\u1eefa c\u00e1c g\u00f3i.<\/li>\n<\/ul>\n

                        B\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 c\u00e1c h\u01b0\u1edbng d\u1eabn n\u00e0y, b\u1ea1n t\u1ea1o ra m\u1ed9t b\u1ea3n \u0111\u1ed3 kh\u00f4ng ch\u1ec9 \u0111\u1ecbnh h\u01b0\u1edbng cho qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n hi\u1ec7n t\u1ea1i m\u00e0 c\u00f2n l\u00e0m t\u00e0i li\u1ec7u tham kh\u1ea3o cho nh\u1eefng ng\u01b0\u1eddi b\u1ea3o tr\u00ec trong t\u01b0\u01a1ng lai. C\u00f4ng s\u1ee9c b\u1ecf ra \u0111\u1ec3 v\u1ebd c\u00e1c bi\u1ec3u \u0111\u1ed3 n\u00e0y s\u1ebd mang l\u1ea1i l\u1ee3i \u00edch l\u1edbn th\u00f4ng qua vi\u1ec7c gi\u1ea3m thi\u1ec3u l\u1ed7i v\u00e0 t\u0103ng t\u1ed1c \u0111\u1ed9 tri\u1ec3n khai t\u00ednh n\u0103ng.<\/p>\n

                        \ud83d\udd0d Suy ngh\u0129 cu\u1ed1i c\u00f9ng<\/h2>\n

                        Bi\u1ec3u \u0111\u1ed3 G\u00f3i kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 m\u1ed9t b\u1ea3n v\u1ebd; \u0111\u00f3 l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 giao ti\u1ebfp. N\u00f3 c\u1ea7u n\u1ed1i kho\u1ea3ng c\u00e1ch gi\u1eefa vi\u1ec7c tri\u1ec3n khai k\u1ef9 thu\u1eadt v\u00e0 c\u00e1c y\u00eau c\u1ea7u kinh doanh b\u1eb1ng c\u00e1ch t\u1ed5 ch\u1ee9c s\u1ef1 ph\u1ee9c t\u1ea1p th\u00e0nh c\u00e1c ph\u1ea7n c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd \u0111\u01b0\u1ee3c. D\u00f9 b\u1ea1n \u0111ang l\u00ean k\u1ebf ho\u1ea1ch cho m\u1ed9t h\u1ec7 th\u1ed1ng m\u1edbi hay b\u1ea3o tr\u00ec m\u1ed9t h\u1ec7 th\u1ed1ng c\u0169, kh\u1ea3 n\u0103ng h\u00ecnh dung c\u1ea5u tr\u00fac ph\u1ea7n m\u1ec1m c\u1ee7a m\u00ecnh l\u00e0 m\u1ed9t k\u1ef9 n\u0103ng thi\u1ebft y\u1ebfu. H\u00e3y t\u1eadp trung v\u00e0o s\u1ef1 r\u00f5 r\u00e0ng, kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec v\u00e0 vi\u1ec7c nh\u00f3m logic, v\u00e0 ki\u1ebfn tr\u00fac c\u1ee7a b\u1ea1n s\u1ebd v\u01b0\u1ee3t qua th\u1eed th\u00e1ch c\u1ee7a th\u1eddi gian.<\/p>\n","protected":false},"excerpt":{"rendered":"

                        S\u01a1 \u0111\u1ed3 G\u00f3i \u0111\u00f3ng vai tr\u00f2 l\u00e0 c\u00f4ng c\u1ee5 n\u1ec1n t\u1ea3ng trong ki\u1ebfn tr\u00fac c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m ph\u1ee9c t\u1ea1p. N\u00f3 cung c\u1ea5p c\u00e1i nh\u00ecn t\u1ed5ng quan v\u1ec1…<\/p>\n","protected":false},"author":1,"featured_media":4084,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"H\u01b0\u1edbng d\u1eabn Bi\u1ec3u \u0111\u1ed3 G\u00f3i: C\u01a1 b\u1ea3n UML & Th\u1ef1c h\u00e0nh T\u1ed1t nh\u1ea5t \ud83d\udce6","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch thi\u1ebft k\u1ebf c\u00e1c Bi\u1ec3u \u0111\u1ed3 G\u00f3i hi\u1ec7u qu\u1ea3 cho ki\u1ebfn tr\u00fac ph\u1ea7n m\u1ec1m. 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