feat(simulator): support bpmn:Activity token sinks

Closes #94
bpmn-io · Dec 19, 2021 · 69fd30c · 69fd30c
1 parent 9da9174
commit 69fd30c
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Showing 3 changed files with 79 additions and 5 deletions.
diff --git a/lib/simulator/behaviors/ActivityBehavior.js b/lib/simulator/behaviors/ActivityBehavior.js
@@ -96,14 +96,34 @@ ActivityBehavior.prototype.exit = function(context) {
 
   const parentScope = scope.parent;
 
+  let sequenceFlowTaken = false;
 
-  for (const outgoing of element.outgoing) {
+  for (const outgoingFlow of element.outgoing) {
 
-    if (isSequenceFlow(outgoing)) {
+    if (!isSequenceFlow(outgoingFlow)) {
+      continue;
+    }
+
+    this._simulator.enter({
+      element: outgoingFlow,
+      scope: parentScope
+    });
+
+    sequenceFlowTaken = true;
+  }
+
+  // element has token sink semantics
+  if (!sequenceFlowTaken) {
+
+    const parentScope = scope.parent;
 
-      this._simulator.enter({
-        element: outgoing,
-        scope: parentScope
+    if (this._scopeBehavior.isFinished(parentScope, scope)) {
+      this._scopeBehavior.exit({
+        scope: parentScope,
+        initiator: {
+          element,
+          scope
+        }
       });
     }
   }

diff --git a/test/spec/simulator/Simulator.task-token-sink.bpmn b/test/spec/simulator/Simulator.task-token-sink.bpmn
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" xmlns:modeler="http://camunda.org/schema/modeler/1.0" id="Definitions_0avz3fy" targetNamespace="http://bpmn.io/schema/bpmn" exporter="bpmn-js (https://demo.bpmn.io)" exporterVersion="8.8.3">
+  <bpmn:process id="Process_1" isExecutable="true">
+    <bpmn:startEvent id="Start">
+      <bpmn:outgoing>Flow_1</bpmn:outgoing>
+    </bpmn:startEvent>
+    <bpmn:task id="EndTask">
+      <bpmn:incoming>Flow_1</bpmn:incoming>
+    </bpmn:task>
+    <bpmn:sequenceFlow id="Flow_1" sourceRef="Start" targetRef="EndTask" />
+  </bpmn:process>
+  <bpmndi:BPMNDiagram id="BPMNDiagram_1">
+    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Process_1">
+      <bpmndi:BPMNEdge id="Flow_1_di" bpmnElement="Flow_1">
+        <di:waypoint x="188" y="120" />
+        <di:waypoint x="240" y="120" />
+      </bpmndi:BPMNEdge>
+      <bpmndi:BPMNShape id="Start_di" bpmnElement="Start">
+        <dc:Bounds x="152" y="102" width="36" height="36" />
+      </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="EndTask_di" bpmnElement="EndTask">
+        <dc:Bounds x="240" y="80" width="100" height="80" />
+      </bpmndi:BPMNShape>
+    </bpmndi:BPMNPlane>
+  </bpmndi:BPMNDiagram>
+</bpmn:definitions>
diff --git a/test/spec/simulator/SimulatorSpec.js b/test/spec/simulator/SimulatorSpec.js
@@ -209,6 +209,34 @@ describe('simulator', function() {
     });
 
 
+    verify('task-token-sink', () => {
+
+      // when
+      signal({
+        element: element('Process_1')
+      });
+
+      // then
+      expectTrace([
+        'createScope:Process_1:null',
+        'signal:Process_1:A',
+        'createScope:Start:A',
+        'signal:Start:B',
+        'exit:Start:B',
+        'createScope:Flow_1:A',
+        'destroyScope:Start:B',
+        'enter:Flow_1:A',
+        'exit:Flow_1:C',
+        'createScope:EndTask:A',
+        'destroyScope:Flow_1:C',
+        'enter:EndTask:A',
+        'exit:EndTask:D',
+        'destroyScope:EndTask:D',
+        'exit:Process_1:A',
+        'destroyScope:Process_1:A'
+      ]);
+    });
+
     verify('exclusive-gateway-fork-join', () => {
 
       // given