{"id":2129,"date":"2026-05-26T07:05:25","date_gmt":"2026-05-26T07:05:25","guid":{"rendered":"https:\/\/www.vpascode.com\/fr\/docs\/uncategorized\/plantuml-sequence-diagram-syntax-guide\/"},"modified":"2026-05-26T07:05:25","modified_gmt":"2026-05-26T07:05:25","slug":"plantuml-sequence-diagram-syntax-guide","status":"publish","type":"ld_docs","link":"https:\/\/www.vpascode.com\/fr\/docs\/vpascode-docs\/plantuml-sequence-diagram-syntax-guide\/","title":{"rendered":"Guide de syntaxe des diagrammes de s\u00e9quence PlantUML"},"content":{"rendered":"<h2>Qu&#8217;est-ce qu&#8217;un diagramme de s\u00e9quence ?<\/h2>\n<p>Un <strong>diagramme de s\u00e9quence<\/strong> est un diagramme comportemental <strong>diagramme UML<\/strong> qui d\u00e9taille comment les op\u00e9rations logicielles sont effectu\u00e9es au fil du temps. En tant que standard fondamental de la sp\u00e9cification du langage de mod\u00e9lisation unifi\u00e9 (UML), il mod\u00e9lise l&#8217;ordre chronologique pr\u00e9cis selon lequel les objets, processus ou microservices \u00e9changent des messages. En repr\u00e9sentant les lignes de vie verticalement et les interactions s\u00e9quentielles horizontalement, ce type sp\u00e9cifique <strong>type de diagramme UML<\/strong> permet aux ing\u00e9nieurs logiciels et aux architectes syst\u00e8me de visualiser clairement des s\u00e9quences complexes d&#8217;appels d&#8217;API, des \u00e9changes de donn\u00e9es r\u00e9seau et des limites des transactions de base de donn\u00e9es avant d&#8217;\u00e9crire du code de production.<\/p>\n<p>Avec <strong>VPasCode<\/strong>, vous n&#8217;avez pas \u00e0 passer des heures \u00e0 aligner des fl\u00e8ches parall\u00e8les, \u00e0 allonger les lignes de message ou \u00e0 d\u00e9placer les bo\u00eetes englobantes pour faire de la place \u00e0 une nouvelle \u00e9tape. Notre moteur de mise en page calcule dynamiquement toute la grille temporelle au fur et \u00e0 mesure que vous tapez vos scripts d\u00e9claratifs en texte brut.<\/p>\n<h2>Guide de syntaxe fondamentale : \u00e9l\u00e9ments et constructions<\/h2>\n<p>Pour concevoir un diagramme de s\u00e9quence UML fonctionnel et conforme aux normes dans PlantUML, vous devez ma\u00eetriser les d\u00e9clarations de composants, les styles des fl\u00e8ches de message, les lignes de vie et les structures de contr\u00f4le logiques.<\/p>\n<h3>1. D\u00e9clarer les participants UML et leurs formes<\/h3>\n<p>Par d\u00e9faut, les composants de ce diagramme UML h\u00e9ritent d&#8217;une forme de bo\u00eete carr\u00e9e standard. Toutefois, vous pouvez modifier l&#8217;arch\u00e9type visuel de vos entit\u00e9s afin de donner aux lecteurs un contexte architectural imm\u00e9diat sur les limites de votre syst\u00e8me en utilisant des mots-cl\u00e9s UML sp\u00e9cifiques :<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Plantuml<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:IqmkoIzISCx9JCqhuULAoY_DIqaigbHGSWpmL71FB4ajJwnKKaWiXh5vkPBpyqgAydCKd25qJceHBrTAOabYKc9nge9IG7vnINfHQd2W3rYNYnC0\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Plantuml<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:IqmkIIqjKd3EoKpDA-5AoY_AIrLG2aWiBaujIit9ILLm3F1KKaZEpyrDLK28SYNdvvKK7Tu2b7U6iKgBk5Boy_8Ehqmj1XgGNroINfGQ7EW3q-pY1000\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-plantuml\"><code class=\"language-plantuml\" data-language=\"plantuml\" class=\"language-plantuml\">acteur Client\nborne \"Passerelle API\" comme Passerelle\ncontr\u00f4le Contr\u00f4leur\ndonn\u00e9es \"PostgreSQL\" comme DB<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:IqmkIIqjKd3EoKpDA-5AoY_AIrLG2aWiBaujIit9ILLm3F1KKaZEpyrDLK28SYNdvvKK7Tu2b7U6iKgBk5Boy_8Ehqmj1XgGNroINfGQ7EW3q-pY1000\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:IqmkoIzISCx9JCqhuULAoY_DIqaigbHGSWpmL71FB4ajJwnKKaWiXh5vkPBpyqgAydCKd25qJceHBrTAOabYKc9nge9IG7vnINfHQd2W3rYNYnC0\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"KAQHVeB\"><img fetchpriority=\"high\" alt=\"\" class=\"alignnone size-full wp-image-559\" decoding=\"async\" fetchpriority=\"high\" height=\"171\" sizes=\"(max-width: 327px) 100vw, 327px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18f8637e3aa.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18f8637e3aa.png 327w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18f8637e3aa-300x157.png 300w\" width=\"327\"\/><\/p>\n<h3>2. Fl\u00e8ches de message et synchronicit\u00e9<\/h3>\n<p>Le style de vos lignes et t\u00eates de fl\u00e8ches \u00e9tablit le protocole de communication exact qui a lieu \u00e0 travers vos pipelines d&#8217;infrastructure selon les normes des diagrammes UML :<\/p>\n<ul>\n<li><strong>Demande synchrone (bloquante) :<\/strong> Indiqu\u00e9 par une ligne pleine et une t\u00eate de fl\u00e8che pleine. L&#8217;exp\u00e9diteur attend une r\u00e9ponse :<code>A -&gt; B<\/code><\/li>\n<li><strong>Message asynchrone (non bloquant) :<\/strong> Indiqu\u00e9 par une ligne pleine et une t\u00eate de fl\u00e8che ouverte fine. L&#8217;exp\u00e9diteur transmet les donn\u00e9es et poursuit imm\u00e9diatement :<code>A -&gt;&gt; B<\/code><\/li>\n<li><strong>R\u00e9ponse \/ Valeur de retour :<\/strong> Indiqu\u00e9 par une ligne pointill\u00e9e et une t\u00eate de fl\u00e8che ouverte :<code>B --&gt; A<\/code><\/li>\n<\/ul>\n<h3>3. Gestion des lignes de vie (activation et d\u00e9sactivation)<\/h3>\n<p>Pour \u00e9viter que vos composants n&#8217;aient l&#8217;air de barres plates, vous devez montrer explicitement quand un processus consomme activement des threads CPU ou une capacit\u00e9 de m\u00e9moire. Utilisez les marqueurs <code>activer<\/code> et <code>d\u00e9sactiver<\/code> marqueurs, ou utilisez la syntaxe raccourcie d&#8217;incr\u00e9mentation en ligne (<code>++<\/code> \/ <code>--<\/code>):<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Plantuml<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:SqyiIIrFh5JGjLDmpiyhAShFoKajKj3MLh1IK2eeoazEBIuEIApCJSqhqT1KukL2KgCBrE8EqwqBKb-KMb9QbATGb9gScbbGeWG0\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Plantuml<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:2qWiBaujIit9ILNGjLDmpiyhAJgy9IUrj4X1Mrl1Ia6fe2W_ERMuE22nCZSrhqH3KucN2rcHBb1J098HkY0zHQab-QL5UQb52aMfXvUNAW40\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-plantuml\"><code class=\"language-plantuml\" data-language=\"plantuml\" class=\"language-plantuml\">Passerelle -&gt; Contr\u00f4leur ++ : \"processPayment()\"\r\nContr\u00f4leur --&gt; Passerelle -- : \"retourner re\u00e7u\"<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:2qWiBaujIit9ILNGjLDmpiyhAJgy9IUrj4X1Mrl1Ia6fe2W_ERMuE22nCZSrhqH3KucN2rcHBb1J098HkY0zHQab-QL5UQb52aMfXvUNAW40\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:SqyiIIrFh5JGjLDmpiyhAShFoKajKj3MLh1IK2eeoazEBIuEIApCJSqhqT1KukL2KgCBrE8EqwqBKb-KMb9QbATGb9gScbbGeWG0\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"gzStGhj\"><img alt=\"\" class=\"alignnone size-full wp-image-560\" decoding=\"async\" height=\"140\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18f8700563f.png\" width=\"235\"\/><\/p>\n<h3>4. Blocs logiques : alternatives, boucles et parall\u00e8les<\/h3>\n<p>La logique m\u00e9tier complexe (telles que les branches if\/else, les nouvelles tentatives sur la base de donn\u00e9es ou les threads d&#8217;ex\u00e9cution parall\u00e8les) doit \u00eatre encapsul\u00e9e dans des limites de cadre global structur\u00e9es appel\u00e9es fragments combin\u00e9s dans la sp\u00e9cification du diagramme UML :<\/p>\n<ul>\n<li><strong>Logique conditionnelle (alt \/ else) :<\/strong> Mod\u00e9lise les branches conditionnelles.\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Plantuml<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:NSmn2e0m44JHNl0EWxqNi13q11PU82GZ1a8MTpTuVRNrz--7uh0M8ysELX2bfknPQj_XRS4uOyM4OLE9PCAT_OJoQZGV-ex5Y2FaqfGm3yu_t4-L6rGLVU-97whf0G00\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Plantuml<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:NSqn2eH038NXNl0E3nihBs2ni6lh9OA949ZDG2PpAC_XnHmR2r_zVpnAWIqRQsWs-7dKKbJw3crVJ1_yC6DOieLQ5KSYiFp9M8Q-AseDdKTGW4Tnb-flkf9jjvDsm_9aJUzg5m00\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-plantuml\"><code class=\"language-plantuml\" data-language=\"plantuml\" class=\"language-plantuml\">alt condition r\u00e9ussie\r\n    A -&gt; B : \"Continuer la demande\"\r\nsinon \u00e9tat d'erreur\r\n    A -&gt; B : \"Lancer le code d'erreur\"\r\nfin<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:NSqn2eH038NXNl0E3nihBs2ni6lh9OA949ZDG2PpAC_XnHmR2r_zVpnAWIqRQsWs-7dKKbJw3crVJ1_yC6DOieLQ5KSYiFp9M8Q-AseDdKTGW4Tnb-flkf9jjvDsm_9aJUzg5m00\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:NSmn2e0m44JHNl0EWxqNi13q11PU82GZ1a8MTpTuVRNrz--7uh0M8ysELX2bfknPQj_XRS4uOyM4OLE9PCAT_OJoQZGV-ex5Y2FaqfGm3yu_t4-L6rGLVU-97whf0G00\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"IiQjPoY\"><img alt=\"\" class=\"alignnone size-full wp-image-561\" decoding=\"async\" height=\"186\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18f87e19b90.png\" width=\"223\"\/><\/p>\n<\/li>\n<li><strong>Boucles de r\u00e9p\u00e9tition (loop) :<\/strong> Mod\u00e9lise les it\u00e9rations, les nouvelles tentatives ou les blocs de traitement de file d&#8217;attente jusqu&#8217;\u00e0 ce qu&#8217;une condition soit satisfaite.\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Plantuml<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:oydFBr0epIl9p54eB4qjJLN8B5P8pIqegUJbKW22yFoYxDGY1LqxXK2mh9M2abjgINA6GbvgHOb2LdwI4YzNQbuA0000\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Plantuml<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:IyelJSv9LSWgBIuiLJ-yG24vLQ6mD5KX9r4XBHCedgAUM5AIcbUIgb2SdrcYK9QPaihBfG048KM9POcPEJcffKKAkdOARgYAhHIKWWwlJ2ujEBooABK8P5h9uKN96K1JIZFB4e4gb7YvqZBp0000\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-plantuml\"><code class=\"language-plantuml\" data-language=\"plantuml\" class=\"language-plantuml\">boucle jusqu'\u00e0 ce que la file d'attente soit vide\r\n    Travailleur -&gt; File d'attente : \"R\u00e9cup\u00e9rer la t\u00e2che suivante\"\r\nfin<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:IyelJSv9LSWgBIuiLJ-yG24vLQ6mD5KX9r4XBHCedgAUM5AIcbUIgb2SdrcYK9QPaihBfG048KM9POcPEJcffKKAkdOARgYAhHIKWWwlJ2ujEBooABK8P5h9uKN96K1JIZFB4e4gb7YvqZBp0000\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:oydFBr0epIl9p54eB4qjJLN8B5P8pIqegUJbKW22yFoYxDGY1LqxXK2mh9M2abjgINA6GbvgHOb2LdwI4YzNQbuA0000\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"xTCUEgP\"><img loading=\"lazy\" alt=\"\" class=\"alignnone size-full wp-image-562\" decoding=\"async\" height=\"142\" loading=\"lazy\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18f88daf040.png\" width=\"237\"\/><\/p>\n<\/li>\n<li><strong>Ex\u00e9cutions parall\u00e8les (par) :<\/strong> Les mod\u00e8les s\u00e9parent les op\u00e9rations s&#8217;ex\u00e9cutant simultan\u00e9ment sur des threads ind\u00e9pendants.\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Plantuml<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:JOmx2iD030LxW-_mS9yBf0ZaKwPAYjHYBGU1zeCa6tpxUBkyRc3cDJAyre96HggiQ5OJkxEF0uvTSRhWMRzljaqIuupfOnACC3gG2kaUadmQ1rRdl-Xnw_AzvYo1j7hKpDRl5r76J46zAVCF\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Plantuml<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:JOun2W9134NxXRr3sDuBM0ZAsjWAzc4cAu4XioGpeaVm9Bhdc8kPwKpruFF-pueAvsVRGYsa4CbWrHp8h3gXOahjcyZ60VoEi3l0bVJ1WMQwvAg2YGqBPu4zJEqTb9N01K2FNkOG2OfY--2Tfd4mbYn_RQUvYpUlYRxVnPX5sjQXzbyMJX0IanIt5vOV\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-plantuml\"><code class=\"language-plantuml\" data-language=\"plantuml\" class=\"language-plantuml\">par Ex\u00e9cuter des processus parall\u00e8les\r\n    A -&gt; ServiceDeJournalisation : \"\u00c9crire les analyses de tra\u00e7age\"\r\nsinon\r\n    A -&gt; BD : \"Valider les donn\u00e9es du profil client\"\r\nfin<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:JOun2W9134NxXRr3sDuBM0ZAsjWAzc4cAu4XioGpeaVm9Bhdc8kPwKpruFF-pueAvsVRGYsa4CbWrHp8h3gXOahjcyZ60VoEi3l0bVJ1WMQwvAg2YGqBPu4zJEqTb9N01K2FNkOG2OfY--2Tfd4mbYn_RQUvYpUlYRxVnPX5sjQXzbyMJX0IanIt5vOV\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:JOmx2iD030LxW-_mS9yBf0ZaKwPAYjHYBGU1zeCa6tpxUBkyRc3cDJAyre96HggiQ5OJkxEF0uvTSRhWMRzljaqIuupfOnACC3gG2kaUadmQ1rRdl-Xnw_AzvYo1j7hKpDRl5r76J46zAVCF\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"xCknQAJ\"><img loading=\"lazy\" alt=\"\" class=\"alignnone size-full wp-image-563\" decoding=\"async\" height=\"174\" loading=\"lazy\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18fd43b0677.png\" width=\"295\"\/><\/p>\n<\/li>\n<\/ul>\n<h2>Meilleures pratiques pour des s\u00e9quences propres<\/h2>\n<ul>\n<li><strong>Regrouper les messages \u00e0 l&#8217;aide de s\u00e9parateurs :<\/strong> Utilisez deux signes \u00e9gal (&#8220;<code>== Votre phase ==<\/code>) pour diviser une s\u00e9quence massive d&#8217;authentification \u00e0 paiement en \u00e9tapes logiques distinctes.<\/li>\n<li><strong>Utilisez le num\u00e9rotage automatique :<\/strong> Placez la directive <code>autonumber<\/code> directement sous <code>@startuml<\/code>. Cela force l&#8217;environnement de travail \u00e0 ins\u00e9rer des entiers d&#8217;\u00e9tape sur chaque fl\u00e8che, rendant les revues de code beaucoup plus faciles.<\/li>\n<li><strong>Gardez les r\u00e9ponses propres :<\/strong> \u00c9vitez d&#8217;\u00e9crire de longues phrases descriptives sur les fl\u00e8ches de retour (<code>--&gt;<\/code>). Au lieu de cela, indiquez simplement quel objet de donn\u00e9es brut ou code HTTP revient (par exemple, <code>\"201 Cr\u00e9\u00e9 Jeton\"<\/code>).<\/li>\n<\/ul>\n<h2>Exemples r\u00e9els de diagrammes de s\u00e9quence PlantUML<\/h2>\n<h3>Exemple 1 : Boucle d&#8217;authentification de microservice (blocs Alt et lignes de vie)<\/h3>\n<p>Ce squelette g\u00e8re une s\u00e9quence de s\u00e9curit\u00e9 standard o\u00f9 un client s&#8217;authentifie aupr\u00e8s d&#8217;une passerelle, mettant en \u00e9vidence des lignes de vie explicites et un cadre de r\u00e9sultat conditionnel alternatif dans un format de diagramme UML standard.<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Plantuml<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:TP5FImCn4CNl2_aEGxmefNGhdZn8YugeXHPtIy_PpTWDpIObVrRqqplJxg47pIN3p8_tNYQBc5H8kRUYK3bvb_i60zLjyW6saUl6PwTL-0QvmmQMnwC45VaMHUjT2jw2NERKGOLXC2sUnzGGXIXO0gOFZCDa0lSWgzpq9i5ZG8qk6MMZ50MFcMAPCxPPLpNCXlcCOdMIfPHDSBKo-owz14G7LMvRZF4pMrZvlN6Y03edYUdeI3gtPGdhTxX-szLG-mEw6pc2R4dSAI617-WqLKygTerNGHE6Dk9ekJ7k0AzkKDReo-n_czwLSzWwJkw3-K7zZsNL-Izu3e5MNNiL4riwpM_LI3zW1fLmtEHbWpU_891-xHS0\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Plantuml<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:ZLBBIWD14BmFp3yqwq4bX2JYoOCaU12Zc40YES_kTapZR4-On-8lvUuVx8_POnQDuC4vDKrLTNNNJ4CqFgR6QcLIT9oQ4htKLSJauIMIfM1ohLNfF2CKi_tUKcKYEOODbWLKhcaGfArLvJZwxiCAR8M-fGgXFXVT7NAaRS_wPaXVAwrEXi3mDWl1O00t8k5IWp5w18i1g3wA68wXq2h3Cbf4UlXoiLh3g9sCyi0YAniRuUo9NdVntYCot3bcVC_6VNT88H1g1VA-H8RzR56w6ezXyGWNSvIBm7oplYnwO1ugk5FBWfzjPRSTUl49qPGMJO8QGGvM2p4GYyhHnvBu3HvEDW7YrbZPBVnjvNeyWMUXvt0yXUxmJoT9ecBtStJ90RqNbF2tnFawTNS8aZEr0ZzcyQkJyvmYr_8tFW40\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-plantuml\"><code class=\"language-plantuml\" data-language=\"plantuml\" class=\"language-plantuml\">@startuml\r\nautonumber\r\nacteur Utilisateur\r\nborne \"Application Web\" comme App\r\ncontr\u00f4le \"Service d'authentification\" comme Auth\r\n\r\nUtilisateur -&gt; App ++ : \"Soumettre les identifiants\"\r\nApp -&gt; Auth ++ : \"POST \/v1\/auth\"\r\n\r\nalt #LightGreen Connexion r\u00e9ussie\r\n    Auth --&gt; App : \"200 OK (Jeton JWT)\"\r\n    App --&gt; Utilisateur : \"Afficher le tableau de bord\"\r\nsinon #LightPink Identifiants invalides\r\n    Auth --&gt; App : \"401 Non autoris\u00e9\"\r\n    App --&gt; Utilisateur : \"Afficher une notification d'erreur\"\r\nfin\r\n\r\nd\u00e9sactiver Auth\r\nd\u00e9sactiver App\r\n@enduml<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:ZLBBIWD14BmFp3yqwq4bX2JYoOCaU12Zc40YES_kTapZR4-On-8lvUuVx8_POnQDuC4vDKrLTNNNJ4CqFgR6QcLIT9oQ4htKLSJauIMIfM1ohLNfF2CKi_tUKcKYEOODbWLKhcaGfArLvJZwxiCAR8M-fGgXFXVT7NAaRS_wPaXVAwrEXi3mDWl1O00t8k5IWp5w18i1g3wA68wXq2h3Cbf4UlXoiLh3g9sCyi0YAniRuUo9NdVntYCot3bcVC_6VNT88H1g1VA-H8RzR56w6ezXyGWNSvIBm7oplYnwO1ugk5FBWfzjPRSTUl49qPGMJO8QGGvM2p4GYyhHnvBu3HvEDW7YrbZPBVnjvNeyWMUXvt0yXUxmJoT9ecBtStJ90RqNbF2tnFawTNS8aZEr0ZzcyQkJyvmYr_8tFW40\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:TP5FImCn4CNl2_aEGxmefNGhdZn8YugeXHPtIy_PpTWDpIObVrRqqplJxg47pIN3p8_tNYQBc5H8kRUYK3bvb_i60zLjyW6saUl6PwTL-0QvmmQMnwC45VaMHUjT2jw2NERKGOLXC2sUnzGGXIXO0gOFZCDa0lSWgzpq9i5ZG8qk6MMZ50MFcMAPCxPPLpNCXlcCOdMIfPHDSBKo-owz14G7LMvRZF4pMrZvlN6Y03edYUdeI3gtPGdhTxX-szLG-mEw6pc2R4dSAI617-WqLKygTerNGHE6Dk9ekJ7k0AzkKDReo-n_czwLSzWwJkw3-K7zZsNL-Izu3e5MNNiL4riwpM_LI3zW1fLmtEHbWpU_891-xHS0\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"PVLiNCs\"><img loading=\"lazy\" alt=\"\" class=\"alignnone size-full wp-image-564\" decoding=\"async\" height=\"392\" loading=\"lazy\" sizes=\"auto, (max-width: 455px) 100vw, 455px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18fd5649b30.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18fd5649b30.png 455w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18fd5649b30-300x258.png 300w\" width=\"455\"\/><\/p>\n<p><strong>Analyse syntaxique :<\/strong> Le <code>autonumber<\/code> balise g\u00e8re automatiquement les num\u00e9ros de 1 \u00e0 5. Le <code>alt<\/code> et <code>sinon<\/code> blocs sont compl\u00e9t\u00e9s par des drapeaux de couleur hexad\u00e9cimale personnalis\u00e9s (par exemple, <code>#LightGreen<\/code>) pour ajouter une mise en \u00e9vidence visuelle imm\u00e9diate des chemins d&#8217;ex\u00e9cution r\u00e9ussis par rapport aux \u00e9checs. Le <code>++<\/code> jetons assure que les lignes de vie restent actives pendant le bloc d&#8217;appel r\u00e9seau.<\/p>\n<h3>Exemple 2 : Traitement avanc\u00e9 des commandes (boucles, parall\u00e8les et s\u00e9parateurs)<\/h3>\n<p>Ce canevas d&#8217;architecture d&#8217;entreprise mod\u00e9lise un syst\u00e8me de paiement robuste qui r\u00e9partit les t\u00e2ches entre des travailleurs parall\u00e8les, ex\u00e9cute des \u00e9critures dans la base de donn\u00e9es et d\u00e9pend d&#8217;une boucle de synchronisation avec un syst\u00e8me externe.<\/p>\n<div class=\"vpascode-viewer-container vpascode-fancy-active\">\n<div class=\"vpascode-header\">\n<span class=\"vpascode-lang-label\">Plantuml<\/span><br \/>\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:PL9HQzim47ut-3ySVbWsIg3htW8fJHpA2gFr5dTz7B9qYKLaoPoaZkpNxoHxfM5waT3TVTzttzsT3u9274nPY1YSZKE7L1QTYrO9EaDLzoXFBWROD0yL29_kib0YY4vuXEg959A7tJO7TzkoaCu6SWQg5qSd9FWUCMAEvjTxy7qWFKwnwLaMPR5UGzCdxCyhQ4bOBsJGpi8tL4U6-ocCPlhqirwN1Sk1vIqJmzKLh9YKT41eq2fjZv3LLMN1uILdvUHbIii1UDX1xUn1qu2gkk2-MK4ZpWFQ01zWuyzMmdqq1srC_dl7F0cVsUjUq16XZZwuWGasKdApWR7dj4iL_oWsCVIEz9zPnIY8sKaOWmQsGfwEb2o3fn4fT-xB0lZC2hAjiu0cTaRx7XQvmL-D4HBL0l0LiufKfJ0P-YhOfdaWQ3nU8Bwv-JogbCTB4gA7u63H2AqM_oEbmRFdIRrnReGV6EYS9l0yGklW2xHwG0yyj4SCltanu5ve4-cIDrsfYLJuw88-Q3bDUfy6y89TxzofUcEQZBo5skZa8bSoRIGBNzksWPlhQ_YuZrAYzv-uw8whUD7_0W00\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 8px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<div class=\"vpascode-code-wrapper\">\n            <div class=\"vpascode-viewer-container vpascode-fancy-active\">\r\n                                <div class=\"vpascode-header\">\r\n                    <span class=\"vpascode-lang-label\">Plantuml<\/span>\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:RPF1RjD048RlblmE8ryCgYALSaDALKfLqGEgeHLND5bFcYthNJEx6zH7u2qundVUO5-CMTknY4GEZXtFF_Fzys-kV40EiJDbWJ4u6xiDSLbi75k2wdrp1or1Zvewig42vRgEG7ukYnO3Rj1BrNM-Ibdhh4q3URdtOoLQkJkARgxBGZaREFqn8hhLScrh344QqoW9Z7lKnb3aHVKvKgI5vo6mxkduRdegYx9Ohw7PPOety0w-ej42fvs5DWBJa_Q1bmdMeyhlFApNPP4DhYw53SxEH5gbNugr51jS301Pc2chif3AbGX6tIehxcwozQLO76urTsceJhWkfBIPjmWKCeWEqnFw5wjsxCJVFqIJjvdgLf0Z4uCP9_MoBsLq3gGivi9Jg6LKpfIrdt5wPBZlqy0uRI0xOzRfmBJg3Le9cj6OT33aomBaCzECASmmJTp8R66fqx1FWvq6rVVS4dzh32fgwsfIjsaOjxsNyZb8hwsp9xsNtN-Ya7DAl-7PnQb_m90XwmPVql2_hlbGRRNDvZOkAjdFez1WVkdXEVeViPP-Rs7hz6XNePnEQQnsf82b4M4yeSbVsQIsJ_dq_AJDphdlEU9ZJDhFPqicM1VqLgjfdTM2CWLn2H_6a7A_BnJ4anNYZu-F3LoSdyEhXwXKElZNehiYsyf_y2y0\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 8px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                <div class=\"vpascode-code-wrapper\">\r\n                    <pre class=\"lang-plantuml\"><code class=\"language-plantuml\" data-language=\"plantuml\" class=\"language-plantuml\">@startuml\r\nautonumber\r\nborne \"API de paiement\" comme API\r\ndatabase \"Base de donn\u00e9es des commandes\" comme DB\r\ncontr\u00f4le \"File d'attente des travailleurs\" comme Queue\r\nborne \"Stripe\" comme Stripe\r\n\r\n== Phase 1 : Validation du registre des transactions ==\r\nAPI -&gt; DB ++ : \"\u00c9crire la commande en attente\"\r\nDB --&gt; API -- : \"ID de commande confirm\u00e9\"\r\n\r\n== Phase 2 : Paiement et traitement asynchrone ==\r\nAPI -&gt; Stripe ++ : \"Facturer le compte client\"\r\nStripe --&gt; API -- : \"Paiement autoris\u00e9\"\r\n\r\npar Op\u00e9rations en arri\u00e8re-plan parall\u00e8les\r\n    API -&gt; Queue ++ : \"Publier l'\u00e9v\u00e9nement 'Order_Placed'\"\r\n    d\u00e9sactiver Queue\r\nsinon\r\n    API -&gt; DB ++ : \"Mettre \u00e0 jour l'\u00e9tat en 'Pay\u00e9'\"\r\n    d\u00e9sactiver DB\r\nfin\r\n\r\nboucle Tentatives jusqu'\u00e0 3 fois en cas d'\u00e9chec r\u00e9seau\r\n    API -&gt; API : \"Ping du webhook de synchronisation des notifications\"\r\nfin\r\n\r\nAPI --&gt; Client : \"Retourner HTTP 200 (Succ\u00e8s)\"\r\n@enduml<\/code><\/pre>                <\/div>\r\n                <div class=\"vpascode-actions\">\r\n                    <a href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:RPF1RjD048RlblmE8ryCgYALSaDALKfLqGEgeHLND5bFcYthNJEx6zH7u2qundVUO5-CMTknY4GEZXtFF_Fzys-kV40EiJDbWJ4u6xiDSLbi75k2wdrp1or1Zvewig42vRgEG7ukYnO3Rj1BrNM-Ibdhh4q3URdtOoLQkJkARgxBGZaREFqn8hhLScrh344QqoW9Z7lKnb3aHVKvKgI5vo6mxkduRdegYx9Ohw7PPOety0w-ej42fvs5DWBJa_Q1bmdMeyhlFApNPP4DhYw53SxEH5gbNugr51jS301Pc2chif3AbGX6tIehxcwozQLO76urTsceJhWkfBIPjmWKCeWEqnFw5wjsxCJVFqIJjvdgLf0Z4uCP9_MoBsLq3gGivi9Jg6LKpfIrdt5wPBZlqy0uRI0xOzRfmBJg3Le9cj6OT33aomBaCzECASmmJTp8R66fqx1FWvq6rVVS4dzh32fgwsfIjsaOjxsNyZb8hwsp9xsNtN-Ya7DAl-7PnQb_m90XwmPVql2_hlbGRRNDvZOkAjdFez1WVkdXEVeViPP-Rs7hz6XNePnEQQnsf82b4M4yeSbVsQIsJ_dq_AJDphdlEU9ZJDhFPqicM1VqLgjfdTM2CWLn2H_6a7A_BnJ4anNYZu-F3LoSdyEhXwXKElZNehiYsyf_y2y0\" \r\n                       target=\"_blank\" \r\n                       rel=\"noopener noreferrer\" \r\n                       class=\"vpascode-fancy-btn\">\r\n                        <svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"margin-right: 6px;\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg>\r\n                        <span>Edit Plantuml in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n<div class=\"vpascode-actions\">\n<a class=\"vpascode-fancy-btn\" href=\"https:\/\/www.vpascode.com\/editor\/#plantuml:PL9HQzim47ut-3ySVbWsIg3htW8fJHpA2gFr5dTz7B9qYKLaoPoaZkpNxoHxfM5waT3TVTzttzsT3u9274nPY1YSZKE7L1QTYrO9EaDLzoXFBWROD0yL29_kib0YY4vuXEg959A7tJO7TzkoaCu6SWQg5qSd9FWUCMAEvjTxy7qWFKwnwLaMPR5UGzCdxCyhQ4bOBsJGpi8tL4U6-ocCPlhqirwN1Sk1vIqJmzKLh9YKT41eq2fjZv3LLMN1uILdvUHbIii1UDX1xUn1qu2gkk2-MK4ZpWFQ01zWuyzMmdqq1srC_dl7F0cVsUjUq16XZZwuWGasKdApWR7dj4iL_oWsCVIEz9zPnIY8sKaOWmQsGfwEb2o3fn4fT-xB0lZC2hAjiu0cTaRx7XQvmL-D4HBL0l0LiufKfJ0P-YhOfdaWQ3nU8Bwv-JogbCTB4gA7u63H2AqM_oEbmRFdIRrnReGV6EYS9l0yGklW2xHwG0yyj4SCltanu5ve4-cIDrsfYLJuw88-Q3bDUfy6y89TxzofUcEQZBo5skZa8bSoRIGBNzksWPlhQ_YuZrAYzv-uw8whUD7_0W00\" rel=\"noopener noreferrer\" target=\"_blank\"><br \/>\n<svg fill=\"none\" height=\"14\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2.5\" style=\"margin-right: 6px;\" viewbox=\"0 0 24 24\" width=\"14\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n<span>Modifier Plantuml dans VPasCode<\/span><br \/>\n<\/a>\n<\/div>\n<\/div>\n<p id=\"tlfOsjb\"><img loading=\"lazy\" alt=\"\" class=\"alignnone size-full wp-image-565\" decoding=\"async\" height=\"605\" loading=\"lazy\" sizes=\"auto, (max-width: 601px) 100vw, 601px\" src=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18fd66d33a0.png\" srcset=\"https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18fd66d33a0.png 601w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18fd66d33a0-298x300.png 298w, https:\/\/www.vpascode.com\/wp-content\/uploads\/2026\/05\/img_6a18fd66d33a0-150x150.png 150w\" width=\"601\"\/><\/p>\n<p><strong>Analyse syntaxique :<\/strong> Le <code>==<\/code> les s\u00e9parateurs divisent la mise en page en phases op\u00e9rationnelles distinctes. Le <code>par<\/code> bloc s\u00e9pare proprement le chemin de la fl\u00e8che de message en deux chemins horizontaux distincts, illustrant que la publication d&#8217;\u00e9v\u00e9nements et les mises \u00e0 jour d&#8217;\u00e9tat de la base de donn\u00e9es se produisent simultan\u00e9ment sans se bloquer mutuellement. La fl\u00e8che auto-r\u00e9f\u00e9rente (<code>API -&gt; API<\/code>) repr\u00e9sente parfaitement une boucle de fonction interne locale.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Qu&#8217;est-ce qu&#8217;un diagramme de s\u00e9quence ? Un diagramme de s\u00e9quence est un diagramme comportemental diagramme UML qui d\u00e9taille comment les op\u00e9rations logicielles sont effectu\u00e9es au fil du temps. En tant que standard fondamental de la sp\u00e9cification du langage de mod\u00e9lisation&#8230;<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":3,"template":"","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"ld_collection":[14],"class_list":["post-2129","ld_docs","type-ld_docs","status-publish","hentry","ld_collection-vpascode-docs"],"yoast_head":"<!-- This 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