{"id":3628,"date":"2022-02-11T10:57:20","date_gmt":"2022-02-11T02:57:20","guid":{"rendered":"https:\/\/blog.visual-paradigm.com\/vn\/?p=3628"},"modified":"2022-11-28T16:00:41","modified_gmt":"2022-11-28T08:00:41","slug":"everything-you-need-to-know-about-sequence-diagrams","status":"publish","type":"post","link":"https:\/\/blog.visual-paradigm.com\/vn\/everything-you-need-to-know-about-sequence-diagrams\/","title":{"rendered":"M\u1ecdi Th\u1ee9 B\u1ea1n C\u1ea7n Bi\u1ebft V\u1ec1 S\u01a1 \u0110\u1ed3 Tu\u1ea7n T\u1ef1"},"content":{"rendered":"<article class=\"post-entry post-entry-type-standard post-entry-3628 post-loop-1 post-parity-odd post-entry-last single-big with-slider post-3628 post type-post status-publish format-standard has-post-thumbnail hentry category-uml\">\n<div class=\"entry-content-wrapper clearfix standard-content\">\n<div class=\"entry-content\">\n<p><a href=\"https:\/\/en.wikipedia.org\/wiki\/Unified_Modeling_Language\" target=\"_blank\" rel=\"noopener\"><span>Bi\u1ec3u \u0111\u1ed3 tr\u00ecnh t\u1ef1 UML<\/span><\/a><span>\u00a0\u00a0l\u00e0 bi\u1ec3u \u0111\u1ed3 t\u01b0\u01a1ng t\u00e1c m\u00f4 t\u1ea3 chi ti\u1ebft c\u00e1ch c\u00e1c ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n.\u00a0Ch\u00fang n\u1eafm b\u1eaft s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng trong b\u1ed1i c\u1ea3nh c\u1ed9ng t\u00e1c.\u00a0Bi\u1ec3u \u0111\u1ed3 tr\u00ecnh t\u1ef1 t\u1eadp trung v\u00e0o th\u1eddi gian v\u00e0 ch\u00fang hi\u1ec3n th\u1ecb th\u1ee9 t\u1ef1 c\u1ee7a t\u01b0\u01a1ng t\u00e1c m\u1ed9t c\u00e1ch tr\u1ef1c quan b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng tr\u1ee5c d\u1ecdc c\u1ee7a bi\u1ec3u \u0111\u1ed3 \u0111\u1ec3 bi\u1ec3u th\u1ecb th\u1eddi gian nh\u1eefng th\u00f4ng \u0111i\u1ec7p n\u00e0o \u0111\u01b0\u1ee3c g\u1eedi v\u00e0 khi n\u00e0o.<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/sequence-diagram-in-uml-diagram-hierarchy.png\" \/><\/p>\n<h2><span id=\"What_is_a_sequence_diagram\"><span>S\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 l\u00e0 g\u00ec?<\/span><\/span><\/h2>\n<p><span>S\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 s\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1, s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 ho\u1eb7c s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1, l\u00e0 m\u1ed9t s\u01a1 \u0111\u1ed3 t\u01b0\u01a1ng t\u00e1c UML.\u00a0N\u00f3 cho th\u1ea5y s\u1ef1 c\u1ed9ng t\u00e1c n\u0103ng \u0111\u1ed9ng gi\u1eefa nhi\u1ec1u \u0111\u1ed1i t\u01b0\u1ee3ng b\u1eb1ng c\u00e1ch m\u00f4 t\u1ea3 th\u1ee9 t\u1ef1 th\u1eddi gian m\u00e0 c\u00e1c th\u00f4ng \u0111i\u1ec7p \u0111\u01b0\u1ee3c g\u1eedi gi\u1eefa ch\u00fang.<\/span><\/p>\n<p><span>Trong UML, m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng trong s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 \u0111\u01b0\u1ee3c v\u1ebd d\u01b0\u1edbi d\u1ea1ng h\u00ecnh ch\u1eef nh\u1eadt ch\u1ee9a t\u00ean c\u1ee7a \u0111\u1ed1i t\u01b0\u1ee3ng, \u0111\u01b0\u1ee3c g\u1ea1ch d\u01b0\u1edbi.\u00a0M\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean theo m\u1ed9t trong ba c\u00e1ch: t\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng, t\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 l\u1edbp c\u1ee7a n\u00f3 ho\u1eb7c ch\u1ec9 t\u00ean l\u1edbp (\u0111\u1ed1i t\u01b0\u1ee3ng \u1ea9n danh).\u00a0Ba c\u00e1ch \u0111\u1eb7t t\u00ean cho m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb trong H\u00ecnh b\u00ean d\u01b0\u1edbi.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13074\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/What-is-Sequence-Diagram.png\" alt=\"\" width=\"1045\" height=\"543\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/92698b4a-e5b4-488d-9e83-b8e517c366ea.xml&amp;name=Hotel%20Reservation\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<h3><span id=\"The_Objects_of_Sequence_Diagram\"><span>C\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a bi\u1ec3u \u0111\u1ed3 tu\u1ea7n t\u1ef1<\/span><\/span><\/h3>\n<ol>\n<li><span>Hi\u1ec3n th\u1ecb th\u1ee9 t\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng.\u00a0L\u1eadp m\u00f4 h\u00ecnh h\u00e0nh vi t\u01b0\u01a1ng t\u00e1c khi truy\u1ec1n tin nh\u1eafn v\u00e0 hi\u1ec3n th\u1ecb \u0111\u1ed9ng t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng b\u1eb1ng c\u00e1ch m\u00f4 t\u1ea3 c\u00e1ch g\u1eedi v\u00e0 nh\u1eadn tin nh\u1eafn gi\u1eefa ch\u00fang.<\/span><\/li>\n<li><span>So v\u1edbi c\u00e1c s\u01a1 \u0111\u1ed3 UML kh\u00e1c, s\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 th\u1eddi gian nh\u1ea5n m\u1ea1nh h\u01a1n v\u00e0o th\u1ee9 t\u1ef1 th\u1eddi gian c\u1ee7a h\u00e0nh vi t\u01b0\u01a1ng t\u00e1c.<\/span><\/li>\n<li><span>N\u00f3 c\u00f3 th\u1ec3 m\u00f4 t\u1ea3 tr\u1ef1c quan qu\u00e1 tr\u00ecnh \u0111\u1ed3ng th\u1eddi.<\/span><\/li>\n<\/ol>\n<h3><span id=\"The_Elements_of_Sequence_Diagram\"><span>C\u00e1c y\u1ebfu t\u1ed1 c\u1ee7a bi\u1ec3u \u0111\u1ed3 tr\u00ecnh t\u1ef1<\/span><\/span><\/h3>\n<p><span>1. T\u00e1c nh\u00e2n \u2013 T\u00e1c nh\u00e2n h\u1ec7 th\u1ed1ng, c\u00f3 th\u1ec3 l\u00e0 con ng\u01b0\u1eddi, m\u00e1y m\u00f3c, h\u1ec7 th\u1ed1ng kh\u00e1c, h\u1ec7 th\u1ed1ng con;\u00a0d\u00f9ng \u0111\u1ec3 bi\u1ec3u di\u1ec5n trong bi\u1ec3u \u0111\u1ed3 tr\u00ecnh t\u1ef1 th\u1eddi gian.<\/span><\/p>\n<p><span>2. \u0110\u1ed1i t\u01b0\u1ee3ng \u2013 C\u00f3 ba c\u00e1ch \u0111\u1eb7t t\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng:<\/span><\/p>\n<ol>\n<li><span>Bao g\u1ed3m t\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 t\u00ean l\u1edbp, v\u00ed d\u1ee5: l\u1edbp tr\u1ef1c ti\u1ebfp: l\u1edbp, trong s\u01a1 \u0111\u1ed3 chu\u1ed7i th\u1eddi gian, v\u1edbi \u201c\u0111\u1ed1i t\u01b0\u1ee3ng: l\u1edbp\u201d.<\/span><\/li>\n<li><span>Ch\u1ec9 hi\u1ec3n th\u1ecb t\u00ean l\u1edbp, ngh\u0129a l\u00e0 n\u00f3 l\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng \u1ea9n danh, v\u00ed d\u1ee5: :course;\u00a0trong s\u01a1 \u0111\u1ed3 th\u1eddi gian, v\u1edbi \u201c:class\u201d.<\/span><\/li>\n<li><span>Ch\u1ec9 hi\u1ec3n th\u1ecb t\u00ean \u0111\u1ed1i t\u01b0\u1ee3ng ch\u1ee9 kh\u00f4ng hi\u1ec3n th\u1ecb t\u00ean l\u1edbp, v\u00ed d\u1ee5: gi\u1ea3ng vi\u00ean;\u00a0trong s\u01a1 \u0111\u1ed3 th\u1eddi gian, n\u00f3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng \u201c\u0111\u1ed1i t\u01b0\u1ee3ng\u201d.<\/span><\/li>\n<\/ol>\n<p><span>C\u1ea3 3 c\u00e1ch \u0111\u1eb7t t\u00ean \u0111\u1ec1u c\u00f3, c\u00e1i n\u00e0o d\u1ec5 nh\u1ea5t cho ng\u01b0\u1eddi \u0111\u1ecdc bi\u1ec3u \u0111\u1ed3 th\u1eddi gian hi\u1ec3u, ch\u1ecdn c\u00e1i n\u00e0o.<\/span><\/p>\n<p><span>3. Th\u1ee9 t\u1ef1 c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng<\/span><\/p>\n<ul>\n<li><span>Th\u1ee9 t\u1ef1 tr\u00e1i ph\u1ea3i c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng quan tr\u1ecdng, nh\u01b0ng \u0111\u1ec3 s\u01a1 \u0111\u1ed3 r\u00f5 r\u00e0ng v\u00e0 g\u1ecdn g\u00e0ng, c\u1ea7n tu\u00e2n theo hai nguy\u00ean t\u1eafc sau: \u0111\u1eb7t c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 t\u01b0\u01a1ng t\u00e1c th\u01b0\u1eddng xuy\u00ean c\u00e0ng g\u1ea7n nhau c\u00e0ng t\u1ed1t;<\/span><\/li>\n<li><span>\u0110\u1eb7t \u0111\u1ed1i t\u01b0\u1ee3ng kh\u1edfi t\u1ea1o to\u00e0n b\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u00e1c \u1edf ngo\u00e0i c\u00f9ng b\u00ean tr\u00e1i.<\/span><\/li>\n<\/ul>\n<h3><span id=\"Lifeline\"><span>d\u00e2y c\u1ee9u sinh<\/span><\/span><\/h3>\n<p><span>M\u1ed9t \u0111\u01b0\u1eddng \u0111\u1ee9t n\u00e9t k\u00e9o d\u00e0i xu\u1ed1ng t\u1eeb bi\u1ec3u t\u01b0\u1ee3ng \u0111\u1ed1i t\u01b0\u1ee3ng trong s\u01a1 \u0111\u1ed3 th\u1eddi gian, cho bi\u1ebft \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00e3 t\u1ed3n t\u1ea1i bao l\u00e2u.<\/span><\/p>\n<ul>\n<li><strong><span>Ti\u00eau \u0111i\u1ec3m \u0111i\u1ec1u khi\u1ec3n<\/span><\/strong><span>\u00a0(hay c\u00f2n g\u1ecdi l\u00e0 kho\u1ea3ng th\u1eddi gian k\u00edch ho\u1ea1t) l\u00e0 k\u00fd hi\u1ec7u cho kho\u1ea3ng th\u1eddi gian m\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng s\u1ebd th\u1ef1c hi\u1ec7n thao t\u00e1c t\u01b0\u01a1ng \u1ee9ng.\u00a0N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c hi\u1ec3u l\u00e0 m\u1ed9t c\u1eb7p d\u1ea5u ngo\u1eb7c { } trong ng\u1eef ngh\u0129a C;\u00a0\u0111\u1ea1i di\u1ec7n b\u1edfi m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt nh\u1ecf.\u00a0N\u00f3 \u0111\u1ea1i di\u1ec7n cho kho\u1ea3ng th\u1eddi gian m\u00e0 m\u1ed9t ph\u1ea7n t\u1eed \u0111ang th\u1ef1c hi\u1ec7n m\u1ed9t ho\u1ea1t \u0111\u1ed9ng.\u00a0Ph\u1ea7n tr\u00ean v\u00e0 ph\u1ea7n d\u01b0\u1edbi c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh t\u01b0\u01a1ng \u1ee9ng v\u1edbi th\u1eddi gian b\u1eaft \u0111\u1ea7u v\u00e0 th\u1eddi gian ho\u00e0n th\u00e0nh.<\/span><\/li>\n<\/ul>\n<ul>\n<li><strong><span>Tin nh\u1eafn<\/span><\/strong><span>\u00a0th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh Tin nh\u1eafn \u0111\u1ed3ng b\u1ed9, Tin nh\u1eafn kh\u00f4ng \u0111\u1ed3ng b\u1ed9 v\u00e0 Tin nh\u1eafn tr\u1ea3 v\u1ec1.<\/span><\/li>\n<\/ul>\n<p><strong><span>l\u01b0u \u00fd r\u1eb1ng<\/span><\/strong><\/p>\n<ul>\n<li><span>Ng\u01b0\u1eddi g\u1eedi tin nh\u1eafn chuy\u1ec3n quy\u1ec1n ki\u1ec3m so\u00e1t cho ng\u01b0\u1eddi nh\u1eadn tin nh\u1eafn, sau \u0111\u00f3 d\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u0111\u1ee3i ng\u01b0\u1eddi nh\u1eadn tin nh\u1eafn t\u1eeb b\u1ecf ho\u1eb7c tr\u1ea3 l\u1ea1i quy\u1ec1n ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 bi\u1ec3u th\u1ecb \u0111\u1ed3ng b\u1ed9 h\u00f3a.<\/span><\/li>\n<\/ul>\n<ul>\n<li><span>Ng\u01b0\u1eddi g\u1eedi tin nh\u1eafn chuy\u1ec3n t\u00edn hi\u1ec7u \u0111\u1ebfn ng\u01b0\u1eddi nh\u1eadn tin nh\u1eafn th\u00f4ng qua tin nh\u1eafn v\u00e0 sau \u0111\u00f3 ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00ecnh m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ee3i ng\u01b0\u1eddi nh\u1eadn tr\u1ea3 l\u1ea1i tin nh\u1eafn ho\u1eb7c \u0111i\u1ec1u khi\u1ec3n.\u00a0Ng\u01b0\u1eddi nh\u1eadn v\u00e0 ng\u01b0\u1eddi g\u1eedi tin nh\u1eafn kh\u00f4ng \u0111\u1ed3ng b\u1ed9 \u0111ang ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed3ng th\u1eddi.<\/span><\/li>\n<\/ul>\n<ul>\n<li><span>Th\u00f4ng b\u00e1o tr\u1ea3 v\u1ec1 cho bi\u1ebft s\u1ef1 tr\u1edf l\u1ea1i t\u1eeb m\u1ed9t cu\u1ed9c g\u1ecdi th\u1ee7 t\u1ee5c.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3 class=\"h3\"><span id=\"Creation_and_Destruction_Messages\"><span>Th\u00f4ng \u0111i\u1ec7p S\u00e1ng t\u1ea1o v\u00e0 H\u1ee7y di\u1ec7t<\/span><\/span><\/h3>\n<p><span>Nh\u1eefng ng\u01b0\u1eddi tham gia kh\u00f4ng nh\u1ea5t thi\u1ebft ph\u1ea3i s\u1ed1ng trong to\u00e0n b\u1ed9 th\u1eddi gian t\u01b0\u01a1ng t\u00e1c c\u1ee7a s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1.\u00a0Nh\u1eefng ng\u01b0\u1eddi tham gia c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o v\u00e0 h\u1ee7y theo c\u00e1c th\u00f4ng b\u00e1o \u0111ang \u0111\u01b0\u1ee3c chuy\u1ec3n.<\/span><\/p>\n<p><span>M\u1ed9t\u00a0\u00a0<\/span><b><span>th\u00f4ng \u0111i\u1ec7p x\u00e2y d\u1ef1ng<\/span><\/b><span>\u00a0\u00a0t\u1ea1o ra ng\u01b0\u1eddi nh\u1eadn c\u1ee7a n\u00f3.\u00a0Ng\u01b0\u1eddi g\u1eedi \u0111\u00e3 t\u1ed3n t\u1ea1i khi b\u1eaft \u0111\u1ea7u t\u01b0\u01a1ng t\u00e1c \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf \u0111\u1ea7u s\u01a1 \u0111\u1ed3.\u00a0C\u00e1c m\u1ee5c ti\u00eau \u0111\u01b0\u1ee3c t\u1ea1o trong qu\u00e1 tr\u00ecnh t\u01b0\u01a1ng t\u00e1c b\u1eb1ng l\u1ec7nh g\u1ecdi h\u00e0m t\u1ea1o s\u1ebd t\u1ef1 \u0111\u1ed9ng \u0111\u01b0\u1ee3c \u0111\u1eb7t xa h\u01a1n trong s\u01a1 \u0111\u1ed3.<\/span><\/p>\n<p><span>M\u1ed9t\u00a0\u00a0<\/span><b><span>th\u00f4ng \u0111i\u1ec7p<\/span><\/b><span>\u00a0\u00a0h\u1ee7y di\u1ec7t ph\u00e1 h\u1ee7y ng\u01b0\u1eddi nh\u1eadn c\u1ee7a n\u00f3.\u00a0C\u00f3 nhi\u1ec1u c\u00e1ch kh\u00e1c \u0111\u1ec3 ch\u1ec9 ra r\u1eb1ng m\u1ee5c ti\u00eau b\u1ecb ti\u00eau di\u1ec7t trong qu\u00e1 tr\u00ecnh t\u01b0\u01a1ng t\u00e1c.\u00a0Ch\u1ec9 khi s\u1ef1 h\u1ee7y di\u1ec7t c\u1ee7a m\u1ee5c ti\u00eau \u0111\u01b0\u1ee3c \u0111\u1eb7t th\u00e0nh &#8216;sau h\u00e0m h\u1ee7y&#8217; th\u00ec b\u1ea1n m\u1edbi ph\u1ea3i s\u1eed d\u1ee5ng h\u00e0m h\u1ee7y.<\/span><\/p>\n<h3 class=\"h3\"><span id=\"Non_instantaneous_message\"><span>Tin nh\u1eafn kh\u00f4ng t\u1ee9c th\u1eddi<\/span><\/span><\/h3>\n<p><span>Tin nh\u1eafn th\u01b0\u1eddng \u0111\u01b0\u1ee3c coi l\u00e0 t\u1ee9c th\u1eddi, do \u0111\u00f3, th\u1eddi gian \u0111\u1ebfn ng\u01b0\u1eddi nh\u1eadn l\u00e0 kh\u00f4ng \u0111\u00e1ng k\u1ec3.\u00a0C\u00e1c th\u00f4ng \u0111i\u1ec7p \u0111\u01b0\u1ee3c v\u1ebd nh\u01b0 m\u1ed9t m\u0169i t\u00ean n\u1eb1m ngang.\u00a0\u0110\u1ec3 ch\u1ec9 ra r\u1eb1ng ph\u1ea3i m\u1ea5t m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh tr\u01b0\u1edbc khi ng\u01b0\u1eddi nh\u1eadn th\u1ef1c s\u1ef1 nh\u1eadn \u0111\u01b0\u1ee3c tin nh\u1eafn, m\u1ed9t\u00a0\u00a0<\/span><b><span>m\u0169i t\u00ean nghi\u00eang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng<\/span><\/b><span>\u00a0.<\/span><\/p>\n<h3><span id=\"Combination_fragments\"><span>m\u1ea3nh gh\u00e9p<\/span><\/span><\/h3>\n<p><span>M\u1ed9t \u0111o\u1ea1n tr\u00ecnh t\u1ef1 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng m\u1ed9t h\u1ed9p \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111o\u1ea1n k\u1ebft h\u1ee3p, ch\u1ee9a m\u1ed9t ph\u1ea7n t\u01b0\u01a1ng t\u00e1c trong bi\u1ec3u \u0111\u1ed3 tr\u00ecnh t\u1ef1.\u00a0To\u00e1n t\u1eed ph\u00e2n \u0111o\u1ea1n (\u1edf g\u00f3c tr\u00ean b\u00ean tr\u00e1i) cho bi\u1ebft lo\u1ea1i ph\u00e2n \u0111o\u1ea1n.\u00a0C\u00e1c \u0111o\u1ea1n t\u01b0\u01a1ng t\u00e1c cho ph\u00e9p b\u1ea1n nh\u00f3m c\u00e1c th\u00f4ng b\u00e1o c\u00f3 li\u00ean quan trong m\u1ed9t s\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1.\u00a0C\u00f3 s\u1eb5n nhi\u1ec1u lo\u1ea1i ph\u00e2n \u0111o\u1ea1n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh tr\u01b0\u1edbc, cho ph\u00e9p b\u1ea1n ch\u1ec9 \u0111\u1ecbnh k\u1ebft qu\u1ea3 thay th\u1ebf, th\u00f4ng b\u00e1o song song ho\u1eb7c v\u00f2ng l\u1eb7p.<\/span><\/p>\n<p><span>\u0110o\u1ea1n trong bi\u1ec3u \u0111\u1ed3 tr\u00ecnh t\u1ef1 l\u00e0 c\u00e1c khung h\u00ecnh ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c v\u1ebd tr\u00ean m\u1ed9t ph\u1ea7n c\u1ee7a bi\u1ec3u \u0111\u1ed3.\u00a0Ch\u00fang \u0111\u1ea1i di\u1ec7n cho c\u1ea5u tr\u00fac c\u00f3 \u0111i\u1ec1u ki\u1ec7n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn lu\u1ed3ng th\u00f4ng \u0111i\u1ec7p.\u00a0C\u00e1c khung n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e1c \u0111o\u1ea1n k\u1ebft h\u1ee3p trong \u0111\u1eb7c t\u1ea3 UML v\u00e0 c\u00e1c b\u1ed9 ch\u1ee9a \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 to\u00e1n h\u1ea1ng t\u01b0\u01a1ng t\u00e1c.\u00a0C\u00e1c khung \u0111\u01b0\u1ee3c d\u00e1n nh\u00e3n \u1edf g\u00f3c tr\u00ean b\u00ean tr\u00e1i.\u00a0Nh\u00e3n n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 to\u00e1n t\u1eed t\u01b0\u01a1ng t\u00e1c trong UML.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h3><span id=\"Example_-_placing_an_order_scenario\"><span>V\u00ed d\u1ee5 \u2013 \u0111\u1eb7t m\u1ed9t t\u00ecnh hu\u1ed1ng \u0111\u1eb7t h\u00e0ng<\/span><\/span><\/h3>\n<p><span>M\u1ed9t th\u00e0nh vi\u00ean t\u00e0u mu\u1ed1n \u0111\u1eb7t h\u00e0ng tr\u1ef1c tuy\u1ebfn.\u00a0C\u00e1c m\u1eb7t h\u00e0ng \u0111\u00e3 \u0111\u1eb7t s\u1ebd \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn th\u00e0nh vi\u00ean b\u1eb1ng chuy\u1ec3n ph\u00e1t nhanh ho\u1eb7c th\u01b0 th\u00f4ng th\u01b0\u1eddng, t\u00f9y thu\u1ed9c v\u00e0o tr\u1ea1ng th\u00e1i th\u00e0nh vi\u00ean c\u1ee7a c\u00f4 \u1ea5y (VIP, th\u00e0nh vi\u00ean th\u01b0\u1eddng).\u00a0N\u1ebfu th\u00e0nh vi\u00ean ch\u1ecdn t\u00f9y ch\u1ecdn th\u00f4ng b\u00e1o trong \u0111\u01a1n h\u00e0ng, c\u1eeda h\u00e0ng s\u1ebd g\u1eedi th\u00f4ng b\u00e1o x\u00e1c nh\u1eadn cho th\u00e0nh vi\u00ean.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13068 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/Selection-and-Loops-in-a-Combination.png\" alt=\"\" width=\"823\" height=\"518\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/bb52d3d5-f881-4d3a-ab67-cad1858fa6d7.xml&amp;name=Selection%20and%20Loops%20in%20a%20Combination\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<h3 class=\"h2\"><span id=\"Another_Example_Place_Order\"><span>M\u1ed9t v\u00ed d\u1ee5 kh\u00e1c: \u0110\u1eb7t h\u00e0ng<\/span><\/span><\/h3>\n<p><span>Bi\u1ec3u \u0111\u1ed3 tr\u00ecnh t\u1ef1 l\u00e0 bi\u1ec3u \u0111\u1ed3 hai chi\u1ec1u v\u1edbi tr\u1ee5c ngang bi\u1ec3u th\u1ecb c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 tr\u1ee5c d\u1ecdc bi\u1ec3u th\u1ecb th\u1eddi gian, trong \u0111\u00f3 c\u00e1c th\u00f4ng b\u00e1o \u0111\u01b0\u1ee3c truy\u1ec1n theo chi\u1ec1u ngang gi\u1eefa c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng v\u00e0 \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp theo chi\u1ec1u d\u1ecdc theo th\u1ee9 t\u1ef1 th\u1eddi gian.\u00a0V\u00ed d\u1ee5 n\u00e0y hi\u1ec3n th\u1ecb s\u01a1 \u0111\u1ed3 Tr\u00ecnh t\u1ef1 c\u00f3 ba \u0111\u1ed1i t\u01b0\u1ee3ng tham gia: Kh\u00e1ch h\u00e0ng, \u0110\u01a1n h\u00e0ng v\u00e0 C\u1ed5 phi\u1ebfu.\u00a0Th\u1eadm ch\u00ed kh\u00f4ng c\u1ea7n bi\u1ebft k\u00fd hi\u1ec7u ch\u00ednh th\u1ee9c, b\u1ea1n c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t \u00fd t\u01b0\u1edfng kh\u00e1 hay v\u1ec1 nh\u1eefng g\u00ec \u0111ang di\u1ec5n ra.<\/span><\/p>\n<ol class=\"contentPoint\">\n<li><span>B\u01b0\u1edbc 1 v\u00e0 2: Kh\u00e1ch h\u00e0ng t\u1ea1o \u0111\u01a1n h\u00e0ng.<\/span><\/li>\n<li><span>B\u01b0\u1edbc 3: Kh\u00e1ch h\u00e0ng th\u00eam h\u00e0ng v\u00e0o \u0111\u01a1n h\u00e0ng.<\/span><\/li>\n<li><span>B\u01b0\u1edbc 4, 5: M\u1ed7i m\u1eb7t h\u00e0ng \u0111\u01b0\u1ee3c ki\u1ec3m tra t\u00ecnh tr\u1ea1ng s\u1eb5n c\u00f3 trong kho.<\/span><\/li>\n<li><span>B\u01b0\u1edbc 6, 7, 8 : N\u1ebfu c\u00f3 h\u00e0ng th\u00ec c\u1ed9ng v\u00e0o \u0111\u01a1n h\u00e0ng.<\/span><\/li>\n<li><span>B\u01b0\u1edbc 9 quay l\u1ea1i<\/span><\/li>\n<li><span>B\u01b0\u1edbc 10, 11: l\u01b0u v\u00e0 h\u1ee7y l\u1ec7nh<\/span><\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13091 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/Sequence-Diagram-Place-Order.png\" alt=\"\" width=\"696\" height=\"628\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/b33b10cc-e1b2-490a-883b-c23eed9ca6b7.xml&amp;name=Place%20Order\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<p>&nbsp;<\/p>\n<h3 id=\"YVfQmfd\"><span id=\"Commonly_used_combination_fragments\"><span>C\u00e1c \u0111o\u1ea1n k\u1ebft h\u1ee3p th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng<\/span><\/span><\/h3>\n<p><span>C\u00e1c lo\u1ea1i ph\u00e2n \u0111o\u1ea1n bao g\u1ed3m ref, assert, loop, break, alt, opt v\u00e0 neg, ref, sd.<\/span><\/p>\n<table border=\"1\">\n<tbody>\n<tr>\n<td width=\"150\"><b><span>Nh\u00e0 \u0111i\u1ec1u h\u00e0nh<\/span><\/b><\/td>\n<td><b><span>Ngh\u0129a<\/span><\/b><\/td>\n<\/tr>\n<tr>\n<td><span>thay th\u1ebf<\/span><\/td>\n<td><b><span>Nhi\u1ec1u \u0111o\u1ea1n thay th\u1ebf: ch\u1ec9 \u0111o\u1ea1n c\u00f3 \u0111i\u1ec1u ki\u1ec7n \u0111\u00fang m\u1edbi \u0111\u01b0\u1ee3c th\u1ef1c thi.<\/span><\/b><\/td>\n<\/tr>\n<tr>\n<td><span>opt<\/span><\/td>\n<td><b><span>T\u00f9y ch\u1ecdn<\/span><\/b><span>\u00a0: \u0111o\u1ea1n n\u00e0y ch\u1ec9 th\u1ef1c thi n\u1ebfu \u0111i\u1ec1u ki\u1ec7n \u0111\u01b0\u1ee3c cung c\u1ea5p l\u00e0 \u0111\u00fang.\u00a0T\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi m\u1ed9t alt ch\u1ec9 v\u1edbi m\u1ed9t d\u1ea5u v\u1ebft.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span>m\u1ec7nh<\/span><\/td>\n<td><b><span>Song song<\/span><\/b><span>\u00a0: m\u1ed7i \u0111o\u1ea1n \u0111\u01b0\u1ee3c ch\u1ea1y song song.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span>v\u00f2ng<\/span><\/td>\n<td><b><span>V\u00f2ng l\u1eb7p<\/span><\/b><span>\u00a0: \u0111o\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c thi nhi\u1ec1u l\u1ea7n v\u00e0 b\u1ed9 b\u1ea3o v\u1ec7 cho bi\u1ebft c\u01a1 s\u1edf c\u1ee7a ph\u00e9p l\u1eb7p.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span>ph\u00ea b\u00ecnh<\/span><\/td>\n<td><b><span>V\u00f9ng quan tr\u1ecdng<\/span><\/b><span>\u00a0: \u0111o\u1ea1n c\u00f3 th\u1ec3 ch\u1ec9 c\u00f3 m\u1ed9t lu\u1ed3ng th\u1ef1c thi n\u00f3 c\u00f9ng m\u1ed9t l\u00fac.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span>ph\u1ee7 nh\u1eadn<\/span><\/td>\n<td><b><span>Ph\u1ee7 \u0111\u1ecbnh<\/span><\/b><span>\u00a0: \u0111o\u1ea1n hi\u1ec3n th\u1ecb t\u01b0\u01a1ng t\u00e1c kh\u00f4ng h\u1ee3p l\u1ec7.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span>gi\u1edbi thi\u1ec7u<\/span><\/td>\n<td><b><span>Tham kh\u1ea3o<\/span><\/b><span>\u00a0: \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ed9t t\u01b0\u01a1ng t\u00e1c \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh tr\u00ean m\u1ed9t s\u01a1 \u0111\u1ed3 kh\u00e1c.\u00a0Khung \u0111\u01b0\u1ee3c v\u1ebd \u0111\u1ec3 bao ph\u1ee7 c\u00e1c d\u00e2y c\u1ee9u sinh li\u00ean quan \u0111\u1ebfn t\u01b0\u01a1ng t\u00e1c.\u00a0B\u1ea1n c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c tham s\u1ed1 v\u00e0 gi\u00e1 tr\u1ecb tr\u1ea3 v\u1ec1.<\/span><\/td>\n<\/tr>\n<tr>\n<td><span>sd<\/span><\/td>\n<td><b><span>Bi\u1ec3u \u0111\u1ed3 tr\u00ecnh t\u1ef1<\/span><\/b><span>\u00a0: \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 bao quanh to\u00e0n b\u1ed9 bi\u1ec3u \u0111\u1ed3 tr\u00ecnh t\u1ef1.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span>L\u01b0u \u00fd r\u1eb1ng:<\/span><\/p>\n<ul>\n<li><span>C\u00f3 th\u1ec3 k\u1ebft h\u1ee3p c\u00e1c khung \u0111\u1ec3 ch\u1ee5p, v\u00ed d\u1ee5: v\u00f2ng l\u1eb7p ho\u1eb7c nh\u00e1nh.<\/span><\/li>\n<li><strong><span>C\u00e1c t\u1eeb kh\u00f3a ph\u00e2n \u0111o\u1ea1n k\u1ebft h\u1ee3p<\/span><\/strong><span>\u00a0\u00a0: alt, opt, break, par, seq, nghi\u00eam ng\u1eb7t, ph\u1ee7 \u0111\u1ecbnh, quan tr\u1ecdng, b\u1ecf qua, xem x\u00e9t, kh\u1eb3ng \u0111\u1ecbnh v\u00e0 l\u1eb7p l\u1ea1i.<\/span><\/li>\n<li><span>C\u00e1c r\u00e0ng bu\u1ed9c th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 hi\u1ec3n th\u1ecb c\u00e1c r\u00e0ng bu\u1ed9c v\u1ec1 th\u1eddi gian tr\u00ean c\u00e1c th\u00f4ng b\u00e1o.\u00a0Ch\u00fang c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng cho th\u1eddi gian c\u1ee7a m\u1ed9t tin nh\u1eafn ho\u1eb7c kho\u1ea3ng th\u1eddi gian gi\u1eefa c\u00e1c tin nh\u1eafn.<\/span><\/li>\n<\/ul>\n<h3><span id=\"Examples_of_Combined_Fragments\"><span>V\u00ed d\u1ee5 v\u1ec1 c\u00e1c m\u1ea3nh k\u1ebft h\u1ee3p<\/span><\/span><\/h3>\n<p><span>(1) L\u1ef1a ch\u1ecdn (Alt) \u2013 M\u1ed9t \u0111o\u1ea1n thay th\u1ebf cung c\u1ea5p m\u1ed9t s\u1ed1 \u0111o\u1ea1n thay th\u1ebf \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 (\u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng to\u00e1n h\u1ea1ng t\u01b0\u01a1ng t\u00e1c), t\u1ee9c l\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ec9 \u0111\u1ecbnh c\u00e1c l\u1ef1a ch\u1ecdn lo\u1ea1i tr\u1eeb l\u1eabn nhau gi\u1eefa hai ho\u1eb7c nhi\u1ec1u chu\u1ed7i th\u00f4ng b\u00e1o, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi if..else\u2026 c\u1ed5 \u0111i\u1ec3n:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13093 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/The-use-of-Choice-in-Sequence-Diagram.png\" alt=\"\" width=\"662\" height=\"502\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/16a62028-6ba3-49ec-a803-7ee1b610a1c5.xml&amp;name=Sequence%20Diagram%20Example%3A%20ATM\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<p><span>(2) T\u00f9y ch\u1ecdn (Opt) \u2013 Ch\u1ee9a m\u1ed9t chu\u1ed7i c\u00e1c kh\u1ea3 n\u0103ng x\u1ea3y ra ho\u1eb7c kh\u00f4ng x\u1ea3y ra, ngh\u0129a l\u00e0 m\u1ed9t \u0111o\u1ea1n t\u00f9y ch\u1ecdn ch\u1ec9 \u0111\u01b0\u1ee3c th\u1ef1c thi n\u1ebfu m\u1ed9t s\u1ed1 \u0111i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7 l\u00e0 \u0111\u00fang:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13095 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/Use-of-Option-in-a-Sequence-Diagram.png\" alt=\"\" width=\"505\" height=\"396\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/28feb8b6-2373-4886-ba54-d51b68406ebb.xml&amp;name=Sequence%20Diagram%20Example%3A%20Examination\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<p id=\"lSOROyw\"><span>(3) V\u00f2ng l\u1eb7p (Loop) \u2013 M\u1ed9t v\u00f2ng l\u1eb7p cho ph\u00e9p m\u1ed9t \u0111o\u1ea1n \u0111\u01b0\u1ee3c l\u1eb7p l\u1ea1i cho \u0111\u1ebfn khi m\u1ed9t s\u1ed1 \u0111i\u1ec1u ki\u1ec7n b\u1ea3o v\u1ec7 tr\u1edf th\u00e0nh sai:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13097 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/Use-of-Loop-in-a-Sequence-Diagram.png\" alt=\"\" width=\"542\" height=\"401\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/71b4b136-ce44-4517-a0d7-6d14d89bb0e0.xml&amp;name=Sequence%20Diagram%3A%20Synthesizer%20and%20Score\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<h4><span id=\"Break\"><span>Ph\u00e1 v\u1ee1<\/span><\/span><\/h4>\n<p><span>M\u1ed9t d\u1ea5u ng\u1eaft cho ph\u00e9p tho\u00e1t kh\u1ecfi m\u1ed9t v\u00f2ng l\u1eb7p k\u00e8m theo khi m\u1ed9t s\u1ed1 b\u1ea3o v\u1ec7 tr\u1edf th\u00e0nh \u0111\u00fang:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13098 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/Use-of-Break-in-a-Sequence-Diagram.png\" alt=\"\" width=\"743\" height=\"614\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/e2d7509e-b732-433e-8cdf-07f5ec42a10f.xml&amp;name=Break%20Communication%20Fragment\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<p id=\"mRBYeao\"><span>C\u00e1c d\u1ea5u ng\u1eaft \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u1ec3 m\u00f4 h\u00ecnh x\u1eed l\u00fd ngo\u1ea1i l\u1ec7.\u00a0V\u00ed d\u1ee5 v\u1ec1 s\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 n\u00e0y s\u1eed d\u1ee5ng m\u1ed9t \u0111o\u1ea1n k\u1ebft h\u1ee3p ng\u1eaft v\u00ec n\u00f3 coi \u0111i\u1ec1u ki\u1ec7n s\u1ed1 d\u01b0 &lt; l\u01b0\u1ee3ng l\u00e0 m\u1ed9t ngo\u1ea1i l\u1ec7 thay v\u00ec l\u00e0 m\u1ed9t lu\u1ed3ng thay th\u1ebf.\u00a0\u0110\u1ec3 \u0111\u1ecdc v\u00ed d\u1ee5 n\u00e0y, ch\u00fang ta b\u1eaft \u0111\u1ea7u t\u1eeb g\u00f3c tr\u00ean c\u00f9ng b\u00ean tr\u00e1i c\u1ee7a d\u00e3y v\u00e0 \u0111\u1ecdc xu\u1ed1ng.\u00a0Khi chu\u1ed7i nh\u1eadn \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb tr\u1ea3 v\u1ec1 l\u00e0 \u201cs\u1ed1 d\u01b0\u201d, n\u00f3 s\u1ebd ki\u1ec3m tra xem s\u1ed1 d\u01b0 c\u00f3 nh\u1ecf h\u01a1n s\u1ed1 ti\u1ec1n hay kh\u00f4ng.\u00a0N\u1ebfu s\u1ed1 d\u01b0 kh\u00f4ng \u00edt h\u01a1n s\u1ed1 ti\u1ec1n, th\u00f4ng b\u00e1o ti\u1ebfp theo \u0111\u01b0\u1ee3c g\u1eedi l\u00e0 th\u00f4ng b\u00e1o addDebitTransaction v\u00e0 tr\u00ecnh t\u1ef1 ti\u1ebfp t\u1ee5c nh\u01b0 b\u00ecnh th\u01b0\u1eddng.<\/span><\/p>\n<h4><span id=\"Parallel\"><span>Song song<\/span><\/span><\/h4>\n<p><span>M\u1ed9t \u0111o\u1ea1n song song cho ph\u00e9p nhi\u1ec1u t\u01b0\u01a1ng t\u00e1c ch\u1ea1y song song:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13099 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/Use-of-Parallel-in-a-Sequence-Diagram.png\" alt=\"\" width=\"666\" height=\"412\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/3a8c69c5-b007-4e03-a100-cc8d71e0a994.xml&amp;name=Sequence%20Diagram%20Client%20and%20Server%20Parallel%20Call%20Example\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<h3><span id=\"Frames\"><span>khung<\/span><\/span><\/h3>\n<p><span>M\u1ed9t khung cung c\u1ea5p m\u1ed9t c\u00e1ch \u0111\u1ec3 \u0111\u00f3ng g\u00f3i m\u1ed9t s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13100 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/Use-of-Frame-in-a-Sequence-Diagram.png\" alt=\"\" width=\"714\" height=\"536\" \/><\/p>\n<p><a id=\"tinymce\" class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/29f41692-dca8-4ad7-af5a-bb32201c2a4c.xml&amp;name=Sequence%20Diagram%3A%20ATM%20Transferal\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<h3><span id=\"Reference_Ref\"><span>Tham kh\u1ea3o (Ref)<\/span><\/span><\/h3>\n<p><span>M\u1ed9t khung c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tham chi\u1ebfu trong m\u1ed9t s\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 kh\u00e1c:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13101 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/An-example-of-Interaction-Use.png\" alt=\"\" width=\"1074\" height=\"670\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/193ba62c-e5b5-4418-a58f-5bc82e0a9f40.xml&amp;name=Sequence%20Diagram%20Interaction%20Use%20Example\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<h3 id=\"USZxdap\"><span id=\"Protocols\"><span>giao th\u1ee9c<\/span><\/span><\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13108 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/Sequence-diagram-example.png\" alt=\"\" width=\"849\" height=\"706\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/ee2dee36-0056-4f6c-af39-ddfc67fd406d.xml&amp;name=Sequence%20Diagram%3A%20Supplier%20Selection\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<p id=\"xHMmuEb\"><span>c\u1ed9ng t\u00e1c<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13111 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/Sequence-diagram-Collaboration.png\" alt=\"\" width=\"582\" height=\"334\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/e874dc96-54b9-4d6f-8889-5643ef2ca680.xml&amp;name=Sequence%20Diagram%3A%20Collaborations\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<p id=\"lekOtOh\"><span>k\u1ecbch b\u1ea3n<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13113 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/Sequence-diagram-Scenarios.png\" alt=\"\" width=\"492\" height=\"314\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/4ec4943a-84ee-4fbe-a6d9-c8d6832418df.xml&amp;name=Sequence%20Diagram%20Example%3A%20File%20Controller\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<p id=\"BVGUceg\"><span>T\u00edn hi\u1ec7u v\u00e0 ti\u1ebfp nh\u1eadn<\/span><\/p>\n<p><span>M\u1ed9t ng\u01b0\u1eddi b\u00e1n \u0111\u1ea5u gi\u00e1 c\u00f4ng b\u1ed1 gi\u00e1 \u0111\u1ec1 xu\u1ea5t cho m\u1ed9t m\u1eb7t h\u00e0ng tr\u01b0\u1edbc m\u1ed9t c\u0103n ph\u00f2ng \u0111\u00f4ng \u0111\u00fac nh\u1eefng ng\u01b0\u1eddi tr\u1ea3 gi\u00e1 \u0111ang lo l\u1eafng.\u00a0Khi m\u1ed9t nh\u00e0 th\u1ea7u nghe \u0111\u1ec1 xu\u1ea5t, anh ta quy\u1ebft \u0111\u1ecbnh ch\u1ea5p nh\u1eadn gi\u00e1 hay kh\u00f4ng.<\/span><\/p>\n<p><span>Trong phi\u00ean \u0111\u1ea5u gi\u00e1 t\u1ef1 \u0111\u1ed9ng, ng\u01b0\u1eddi \u0111i\u1ec1u h\u00e0nh phi\u00ean \u0111\u1ea5u gi\u00e1 s\u1ebd ph\u00e1t \u0111\u1ec1 xu\u1ea5t nh\u01b0 th\u1ebf n\u00e0o?\u00a0M\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 c\u00f3 c\u00e1c ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh s\u1ebd t\u1ef1 \u0111\u1ed9ng \u0111\u01b0\u1ee3c g\u1ecdi n\u1ebfu nh\u1eadn \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 lo\u1ea1i t\u00edn hi\u1ec7u qu\u1ea3ng b\u00e1 nh\u1ea5t \u0111\u1ecbnh.\u00a0Nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ti\u1ebfp nh\u1eadn.\u00a0T\u00edn hi\u1ec7u l\u00e0 m\u1ed9t lo\u1ea1i l\u1edbp \u0111\u1eb7c bi\u1ec7t.\u00a0T\u00ean c\u1ee7a b\u1ed9 thu th\u01b0\u1eddng kh\u1edbp v\u1edbi t\u00ean c\u1ee7a t\u00edn hi\u1ec7u.\u00a0L\u1ec5 t\u00e2n \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb trong m\u1ed9t ng\u0103n ri\u00eang bi\u1ec7t:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13127 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/Auctioneer-sequence-diagram-example.png\" alt=\"\" width=\"441\" height=\"155\" \/><\/p>\n<p><a id=\"tinymce\" class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=ClassDiagram&amp;gallery=\/repository\/649527aa-65ff-4010-a55e-19c1741d3f90.xml&amp;name=Class%20Diagram%3A%20Auctioneer%20and%20Bidder\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<p id=\"PvFbdNS\"><span>Trong s\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1, ch\u00fang ta c\u00f3 th\u1ec3 bi\u1ec3u di\u1ec5n t\u00edn hi\u1ec7u d\u01b0\u1edbi d\u1ea1ng t\u00edn hi\u1ec7u kh\u00f4ng \u0111\u1ed3ng b\u1ed9 v\u00e0 vi\u1ec7c nh\u1eadn d\u01b0\u1edbi d\u1ea1ng l\u1ec7nh g\u1ecdi ti\u1ebfp nh\u1eadn:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13129 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/Sequence-diagram-Recursive-message.png\" alt=\"\" width=\"583\" height=\"374\" \/><\/p>\n<p><a id=\"tinymce\" class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/b34d0a63-1bef-455d-8667-e517b7dc000f.xml&amp;name=Sequence%20Diagram%20Example%3A%20Auctioneer%20and%20Bidder\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<p id=\"xYhPHzn\"><span>Ph\u00ea b\u00ecnh<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13130 aligncenter\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/02\/Sequence-diagram-Critical.png\" alt=\"\" width=\"773\" height=\"566\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=SequenceDiagram&amp;gallery=\/repository\/9f1e012a-e8fa-4cbd-a3bb-b0afcd2aaf98.xml&amp;name=Sequence%20Diagram%3A%20Critical\"><span>CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 TR\u00ccNH T\u1ef0 N\u00c0Y<\/span><\/a><\/p>\n<h4><span id=\"Other_Fragment_Types\"><span>C\u00e1c lo\u1ea1i m\u1ea3nh v\u1ee1 kh\u00e1c<\/span><\/span><\/h4>\n<ul>\n<li><span>Nghi\u00eam kh\u1eafc<\/span><\/li>\n<li><span>kh\u1eb3ng \u0111\u1ecbnh<\/span><\/li>\n<li><span>Xem x\u00e9t<\/span><\/li>\n<li><span>Ph\u1edbt l\u1edd<\/span><\/li>\n<li><span>V\u00f9ng \u0111\u1ea5t<\/span><\/li>\n<li><span>ph\u1ee7 \u0111\u1ecbnh<\/span><\/li>\n<\/ul>\n<h3><span id=\"Sequence_Diagram_Notation_Summary\"><span>S\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1 K\u00fd hi\u1ec7u T\u00f3m t\u1eaft<\/span><\/span><\/h3>\n<div class=\"editions\">\n<table class=\"stack\" width=\"1212\">\n<tbody>\n<tr>\n<th><span>K\u00fd hi\u1ec7u M\u00f4 t\u1ea3<\/span><\/th>\n<th width=\"250\"><span>\u0110\u1ea1i di\u1ec7n tr\u1ef1c quan<\/span><\/th>\n<\/tr>\n<tr>\n<td><strong><span>Di\u1ec5n vi\u00ean nam<\/span><\/strong><\/p>\n<ul>\n<li><span>m\u1ed9t lo\u1ea1i vai tr\u00f2 c\u1ee7a m\u1ed9t th\u1ef1c th\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi ch\u1ee7 th\u1ec3 (v\u00ed d\u1ee5: b\u1eb1ng c\u00e1ch trao \u0111\u1ed5i t\u00edn hi\u1ec7u v\u00e0 d\u1eef li\u1ec7u)<\/span><\/li>\n<li><span>b\u00ean ngo\u00e0i ch\u1ee7 th\u1ec3 (t\u1ee9c l\u00e0, theo ngh\u0129a l\u00e0 m\u1ed9t th\u1ec3 hi\u1ec7n c\u1ee7a m\u1ed9t t\u00e1c nh\u00e2n kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a th\u1ec3 hi\u1ec7n c\u1ee7a ch\u1ee7 th\u1ec3 t\u01b0\u01a1ng \u1ee9ng c\u1ee7a n\u00f3).<\/span><\/li>\n<li><span>\u0111\u1ea1i di\u1ec7n cho vai tr\u00f2 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng con ng\u01b0\u1eddi, ph\u1ea7n c\u1ee9ng b\u00ean ngo\u00e0i ho\u1eb7c c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c.<\/span><\/li>\n<\/ul>\n<p><span>L\u01b0u \u00fd r\u1eb1ng:<\/span><\/p>\n<ul>\n<li><span>M\u1ed9t t\u00e1c nh\u00e2n kh\u00f4ng nh\u1ea5t thi\u1ebft \u0111\u1ea1i di\u1ec7n cho m\u1ed9t th\u1ef1c th\u1ec3 v\u1eadt l\u00fd c\u1ee5 th\u1ec3 m\u00e0 ch\u1ec9 l\u00e0 m\u1ed9t vai tr\u00f2 c\u1ee5 th\u1ec3 c\u1ee7a m\u1ed9t s\u1ed1 th\u1ef1c th\u1ec3<\/span><\/li>\n<li><span>M\u1ed9t ng\u01b0\u1eddi c\u00f3 th\u1ec3 \u0111\u00f3ng vai c\u1ee7a nhi\u1ec1u di\u1ec5n vi\u00ean kh\u00e1c nhau v\u00e0 ng\u01b0\u1ee3c l\u1ea1i, m\u1ed9t di\u1ec5n vi\u00ean nh\u1ea5t \u0111\u1ecbnh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u00f3ng b\u1edfi nhi\u1ec1u ng\u01b0\u1eddi kh\u00e1c nhau.<\/span><\/li>\n<\/ul>\n<\/td>\n<td><img decoding=\"async\" id=\"thepasted-2\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/03-sequence-diagram-actor-symbol.png\" alt=\"S\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 UML: V\u00ed d\u1ee5 v\u1ec1 di\u1ec5n vi\u00ean\" \/><\/td>\n<\/tr>\n<tr>\n<td><strong><span>d\u00e2y c\u1ee9u sinh<\/span><\/strong><\/p>\n<ul>\n<li><span>Lifeline \u0111\u1ea1i di\u1ec7n cho m\u1ed9t ng\u01b0\u1eddi tham gia c\u00e1 nh\u00e2n trong T\u01b0\u01a1ng t\u00e1c.<\/span><\/li>\n<\/ul>\n<\/td>\n<td><img decoding=\"async\" id=\"thepasted-3\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/04-sequence-diagram-activation-symbol.png\" alt=\"S\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 UML: V\u00ed d\u1ee5 k\u00edch ho\u1ea1t\" \/><\/td>\n<\/tr>\n<tr>\n<td><strong><span>k\u00edch ho\u1ea1t<\/span><\/strong><\/p>\n<ul>\n<li><span>M\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt m\u1ecfng tr\u00ean \u0111\u01b0\u1eddng c\u1ee9u sinh) bi\u1ec3u th\u1ecb kho\u1ea3ng th\u1eddi gian m\u00e0 m\u1ed9t ph\u1ea7n t\u1eed \u0111ang th\u1ef1c hi\u1ec7n m\u1ed9t thao t\u00e1c.<\/span><\/li>\n<li><span>Ph\u1ea7n tr\u00ean v\u00e0 ph\u1ea7n d\u01b0\u1edbi c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh t\u01b0\u01a1ng \u1ee9ng v\u1edbi th\u1eddi gian b\u1eaft \u0111\u1ea7u v\u00e0 th\u1eddi gian ho\u00e0n th\u00e0nh<\/span><\/li>\n<\/ul>\n<\/td>\n<td><img decoding=\"async\" id=\"thepasted-6\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/04-sequence-diagram-activation-symbol.png\" alt=\"S\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 UML: V\u00ed d\u1ee5 k\u00edch ho\u1ea1t\" \/><\/td>\n<\/tr>\n<tr>\n<td><strong><span>Tin nh\u1eafn cu\u1ed9c g\u1ecdi<\/span><\/strong><\/p>\n<ul>\n<li><span>M\u1ed9t th\u00f4ng b\u00e1o x\u00e1c \u0111\u1ecbnh m\u1ed9t giao ti\u1ebfp c\u1ee5 th\u1ec3 gi\u1eefa c\u00e1c \u0110\u01b0\u1eddng d\u00e2y n\u00f3ng c\u1ee7a m\u1ed9t T\u01b0\u01a1ng t\u00e1c.<\/span><\/li>\n<li><span>Tin nh\u1eafn cu\u1ed9c g\u1ecdi l\u00e0 m\u1ed9t lo\u1ea1i tin nh\u1eafn \u0111\u1ea1i di\u1ec7n cho y\u00eau c\u1ea7u ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u0111\u01b0\u1eddng d\u00e2y c\u1ee9u sinh m\u1ee5c ti\u00eau.<\/span><\/li>\n<\/ul>\n<\/td>\n<td><img decoding=\"async\" id=\"thepasted-4\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/05-sequence-diagram-call-message-symbol.png\" alt=\"S\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 UML: V\u00ed d\u1ee5 v\u1ec1 tin nh\u1eafn cu\u1ed9c g\u1ecdi\" \/><\/td>\n<\/tr>\n<tr>\n<td><strong><span>Tin nh\u1eafn tr\u1ea3 l\u1ea1i<\/span><\/strong><\/p>\n<ul>\n<li><span>M\u1ed9t th\u00f4ng b\u00e1o x\u00e1c \u0111\u1ecbnh m\u1ed9t giao ti\u1ebfp c\u1ee5 th\u1ec3 gi\u1eefa c\u00e1c \u0110\u01b0\u1eddng d\u00e2y n\u00f3ng c\u1ee7a m\u1ed9t T\u01b0\u01a1ng t\u00e1c.<\/span><\/li>\n<li><span>Tin nh\u1eafn tr\u1ea3 l\u1ea1i l\u00e0 m\u1ed9t lo\u1ea1i tin nh\u1eafn \u0111\u1ea1i di\u1ec7n cho vi\u1ec7c truy\u1ec1n th\u00f4ng tin tr\u1edf l\u1ea1i ng\u01b0\u1eddi g\u1ecdi c\u1ee7a m\u1ed9t tin nh\u1eafn c\u0169 t\u01b0\u01a1ng \u1ee9ng.<\/span><\/li>\n<\/ul>\n<\/td>\n<td><img decoding=\"async\" id=\"thepasted-5\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/06-sequence-diagram-return-message-symbol.png\" alt=\"S\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 UML: V\u00ed d\u1ee5 v\u1ec1 th\u00f4ng b\u00e1o tr\u1ea3 v\u1ec1\" \/><\/td>\n<\/tr>\n<tr>\n<td><strong><span>Tin Nh\u1eafn B\u1ea3n Th\u00e2n<\/span><\/strong><\/p>\n<ul>\n<li><span>M\u1ed9t th\u00f4ng b\u00e1o x\u00e1c \u0111\u1ecbnh m\u1ed9t giao ti\u1ebfp c\u1ee5 th\u1ec3 gi\u1eefa c\u00e1c \u0110\u01b0\u1eddng d\u00e2y n\u00f3ng c\u1ee7a m\u1ed9t T\u01b0\u01a1ng t\u00e1c.<\/span><\/li>\n<li><span>Th\u00f4ng \u0111i\u1ec7p b\u1ea3n th\u00e2n l\u00e0 m\u1ed9t lo\u1ea1i th\u00f4ng \u0111i\u1ec7p \u0111\u1ea1i di\u1ec7n cho vi\u1ec7c tri\u1ec7u g\u1ecdi th\u00f4ng \u0111i\u1ec7p c\u1ee7a c\u00f9ng m\u1ed9t huy\u1ebft m\u1ea1ch.<\/span><\/li>\n<\/ul>\n<\/td>\n<td><img decoding=\"async\" id=\"thepasted-7\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/07-sequence-diagram-self-message-symbol.png\" alt=\"S\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 UML: V\u00ed d\u1ee5 v\u1ec1 th\u00f4ng b\u00e1o t\u1ef1\" \/><\/td>\n<\/tr>\n<tr>\n<td><strong><span>Tin nh\u1eafn \u0111\u1ec7 quy<\/span><\/strong><\/p>\n<ul>\n<li><span>M\u1ed9t th\u00f4ng b\u00e1o x\u00e1c \u0111\u1ecbnh m\u1ed9t giao ti\u1ebfp c\u1ee5 th\u1ec3 gi\u1eefa c\u00e1c \u0110\u01b0\u1eddng d\u00e2y n\u00f3ng c\u1ee7a m\u1ed9t T\u01b0\u01a1ng t\u00e1c.<\/span><\/li>\n<li><span>Th\u00f4ng b\u00e1o \u0111\u1ec7 quy l\u00e0 m\u1ed9t lo\u1ea1i th\u00f4ng b\u00e1o \u0111\u1ea1i di\u1ec7n cho vi\u1ec7c g\u1ecdi th\u00f4ng b\u00e1o c\u1ee7a c\u00f9ng m\u1ed9t \u0111\u01b0\u1eddng d\u00e2y s\u1ed1ng.\u00a0M\u1ee5c ti\u00eau c\u1ee7a n\u00f3 tr\u1ecf \u0111\u1ebfn m\u1ed9t k\u00edch ho\u1ea1t \u1edf \u0111\u1ea7u k\u00edch ho\u1ea1t n\u01a1i th\u00f4ng b\u00e1o \u0111\u01b0\u1ee3c g\u1ecdi t\u1eeb \u0111\u00f3.<\/span><\/li>\n<\/ul>\n<\/td>\n<td><img decoding=\"async\" id=\"thepasted-8\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/08-sequence-diagram-recursive-message-symbol.png\" alt=\"S\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 UML: V\u00ed d\u1ee5 v\u1ec1 th\u00f4ng b\u00e1o \u0111\u1ec7 quy\" \/><\/td>\n<\/tr>\n<tr>\n<td><strong><span>T\u1ea1o m\u1ed9t tin nh\u1eafn<\/span><\/strong><\/p>\n<ul>\n<li><span>M\u1ed9t th\u00f4ng b\u00e1o x\u00e1c \u0111\u1ecbnh m\u1ed9t giao ti\u1ebfp c\u1ee5 th\u1ec3 gi\u1eefa c\u00e1c \u0110\u01b0\u1eddng d\u00e2y n\u00f3ng c\u1ee7a m\u1ed9t T\u01b0\u01a1ng t\u00e1c.<\/span><\/li>\n<li><span>Tin nh\u1eafn t\u1ea1o l\u00e0 m\u1ed9t lo\u1ea1i tin nh\u1eafn \u0111\u1ea1i di\u1ec7n cho vi\u1ec7c kh\u1edfi t\u1ea1o (m\u1ee5c ti\u00eau) v\u00f2ng \u0111\u1eddi.<\/span><\/li>\n<\/ul>\n<\/td>\n<td><img decoding=\"async\" id=\"thepasted-9\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/09-sequence-diagram-create-message-symbol.png\" alt=\"S\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 UML: T\u1ea1o v\u00ed d\u1ee5 v\u1ec1 th\u00f4ng b\u00e1o\" \/><\/td>\n<\/tr>\n<tr>\n<td><strong><span>h\u1ee7y tin nh\u1eafn<\/span><\/strong><\/p>\n<ul>\n<li><span>M\u1ed9t th\u00f4ng b\u00e1o x\u00e1c \u0111\u1ecbnh m\u1ed9t giao ti\u1ebfp c\u1ee5 th\u1ec3 gi\u1eefa c\u00e1c \u0110\u01b0\u1eddng d\u00e2y n\u00f3ng c\u1ee7a m\u1ed9t T\u01b0\u01a1ng t\u00e1c.<\/span><\/li>\n<li><span>Th\u00f4ng b\u00e1o h\u1ee7y l\u00e0 m\u1ed9t lo\u1ea1i th\u00f4ng b\u00e1o \u0111\u1ea1i di\u1ec7n cho y\u00eau c\u1ea7u h\u1ee7y v\u00f2ng \u0111\u1eddi c\u1ee7a v\u00f2ng \u0111\u1eddi m\u1ee5c ti\u00eau.<\/span><\/li>\n<\/ul>\n<\/td>\n<td><img decoding=\"async\" id=\"thepasted-10\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/10-sequence-diagram-destroy-message-symbol.png\" alt=\"S\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 UML: V\u00ed d\u1ee5 v\u1ec1 th\u00f4ng b\u00e1o h\u1ee7y\" \/><\/td>\n<\/tr>\n<tr>\n<td><strong><span>Th\u1eddi l\u01b0\u1ee3ng tin nh\u1eafn<\/span><\/strong><\/p>\n<ul>\n<li><span>M\u1ed9t th\u00f4ng b\u00e1o x\u00e1c \u0111\u1ecbnh m\u1ed9t giao ti\u1ebfp c\u1ee5 th\u1ec3 gi\u1eefa c\u00e1c \u0110\u01b0\u1eddng d\u00e2y n\u00f3ng c\u1ee7a m\u1ed9t T\u01b0\u01a1ng t\u00e1c.<\/span><\/li>\n<li><span>Th\u00f4ng b\u00e1o th\u1eddi l\u01b0\u1ee3ng hi\u1ec3n th\u1ecb kho\u1ea3ng c\u00e1ch gi\u1eefa hai th\u1eddi \u0111i\u1ec3m cho m\u1ed9t l\u1eddi g\u1ecdi th\u00f4ng b\u00e1o.<\/span><\/li>\n<\/ul>\n<\/td>\n<td><img decoding=\"async\" id=\"thepasted-11\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/11-sequence-diagram-duration-message-symbol.png\" alt=\"S\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 UML: V\u00ed d\u1ee5 v\u1ec1 th\u00f4ng b\u00e1o th\u1eddi l\u01b0\u1ee3ng\" \/><\/td>\n<\/tr>\n<tr>\n<td><strong><span>Ghi ch\u00fa<\/span><\/strong><span>M\u1ed9t ghi ch\u00fa (b\u00ecnh lu\u1eadn) cung c\u1ea5p kh\u1ea3 n\u0103ng \u0111\u00ednh k\u00e8m c\u00e1c nh\u1eadn x\u00e9t kh\u00e1c nhau cho c\u00e1c ph\u1ea7n t\u1eed.\u00a0M\u1ed9t nh\u1eadn x\u00e9t kh\u00f4ng mang l\u1ef1c l\u01b0\u1ee3ng ng\u1eef ngh\u0129a, nh\u01b0ng c\u00f3 th\u1ec3 ch\u1ee9a th\u00f4ng tin h\u1eefu \u00edch cho ng\u01b0\u1eddi l\u1eadp m\u00f4 h\u00ecnh.<\/span><\/td>\n<td><img decoding=\"async\" id=\"thepasted-14\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/12-sequence-diagram-note-symbol.png\" alt=\"S\u01a1 \u0111\u1ed3 tr\u00ecnh t\u1ef1 UML: L\u01b0u \u00fd v\u00ed d\u1ee5\" \/><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>UML\u00a0Sequence Diagrams are interaction diagrams that detail how operations are carried out. They capture the interaction between objects in the context of a collaboration. Sequence Diagrams are time focus and they show the order of the interaction visually by using the vertical axis of the diagram to represent time what messages are sent and when.<\/p>\n","protected":false},"author":1,"featured_media":3698,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[36],"tags":[],"class_list":["post-3628","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uml","loop-entry","clr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>M\u1ecdi Th\u1ee9 B\u1ea1n C\u1ea7n Bi\u1ebft V\u1ec1 S\u01a1 \u0110\u1ed3 Tu\u1ea7n T\u1ef1 - Visual Paradigm Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.visual-paradigm.com\/vn\/everything-you-need-to-know-about-sequence-diagrams\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"M\u1ecdi Th\u1ee9 B\u1ea1n C\u1ea7n Bi\u1ebft V\u1ec1 S\u01a1 \u0110\u1ed3 Tu\u1ea7n T\u1ef1 - Visual Paradigm Blog\" \/>\n<meta property=\"og:description\" content=\"UML\u00a0Sequence Diagrams are interaction diagrams that detail how operations are carried out. 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