structurizr-export: StructurizrPlantUMLExporter - adds technology to sequence diagrams. Closes #425.

Author: simonbrowndotje

changelog.md

@@ -23,6 +23,7 @@
 - structurizr-export: Removes support for deprecated enterprise and location concepts.
 - structurizr-export: PlantUML exporters - replaces skinparams with styles.
 - structurizr-export: PlantUML exporters - adds support for dark mode exports.
+- structurizr-export: StructurizrPlantUMLExporter - adds technology to sequence diagrams (https://github.com/structurizr/java/issues/425)
 - structurizr-import: Adds support for `plantuml.inline`, `mermaid.inline`, `kroki.inline`, and `image.inline` properties to inline the resulting PNG/SVG file into the workspace.
 - structurizr-inspection: Adds a way to disable inspections via a workspace property named `structurizr.inspection` (`false` to disable).
 - structurizr-inspection: Default inspector adds a summary of error/warning/info/ignore counts as workspace properties.

structurizr-export/src/main/java/com/structurizr/export/plantuml/StructurizrPlantUMLExporter.java

@@ -428,6 +428,7 @@ protected void writeRelationship(ModelView view, RelationshipView relationshipVi
         );
         plantUMLStyles.add(plantUMLRelationshipStyle);
 
+        int metadataFontSize = calculateMetadataFontSize(style.getFontSize());
         String description = "";
         String technology = relationship.getTechnology();
 
@@ -451,13 +452,14 @@ protected void writeRelationship(ModelView view, RelationshipView relationshipVi
             }
 
             writer.writeLine(
-                    String.format("%s %s%s %s <<%s>> : %s",
+                    String.format("%s %s%s %s <<%s>> : %s%s",
                             idOf(relationship.getSource()),
                             arrowStart,
                             arrowEnd,
                             idOf(relationship.getDestination()),
                             plantUMLRelationshipStyle.getClassSelector(),
-                            description));
+                            description,
+                            (StringUtils.isNullOrEmpty(technology) ? "" : "\\n<size:" + metadataFontSize + ">[" + technology + "]</size>")));
         } else {
             String arrow;
 
@@ -467,12 +469,6 @@ protected void writeRelationship(ModelView view, RelationshipView relationshipVi
                 arrow = "-->";
             }
 
-//            if (!isVisible(view, relationshipView)) {
-//                relationshipStyle = "hidden";
-//            }
-
-            int metadataFontSize = calculateMetadataFontSize(style.getFontSize());
-
             // 1 --> 2 : "...\n<size:..>...</size>
             writer.writeLine(format("%s %s %s <<%s>> : \"%s%s\"",
                     idOf(relationship.getSource()),

structurizr-export/src/test/java/com/structurizr/export/plantuml/StructurizrPlantUMLDiagramExporterTests.java

@@ -647,7 +647,7 @@ public void dynamicView_SequenceStyle_NoStyling_Light() {
         SoftwareSystem a = workspace.getModel().addSoftwareSystem("A");
         SoftwareSystem b = workspace.getModel().addSoftwareSystem("B");
 
-        a.uses(b, "Uses");
+        a.uses(b, "Uses", "JSON/HTTPS");
 
         DynamicView view = workspace.getViews().createDynamicView("key", "Description");
         view.add(a, b);
@@ -692,8 +692,8 @@ public void dynamicView_SequenceStyle_NoStyling_Light() {
                 
                 participant "A\\n<size:16>[Software System]</size>" as A <<Element-RWxlbWVudA==>> #ffffff
                 participant "B\\n<size:16>[Software System]</size>" as B <<Element-RWxlbWVudA==>> #ffffff
-
-                A -> B <<Relationship-UmVsYXRpb25zaGlw>> : Uses
+                
+                A -> B <<Relationship-UmVsYXRpb25zaGlw>> : 1. Uses\\n<size:16>[JSON/HTTPS]</size>
                 
                 @enduml""", diagram.getDefinition());