flowable 走過的流程 紅線標註

在正常的flowable就是顯示當前節點,路徑須要咱們本身獲取,特別是來回的駁回會致使節點混亂,這裏主要就是如何正確的顯示流程圖網絡

效果:app

已經結束的流程ide

  正在執行的流程this

 代碼:一、生成圖片spa

// 源碼 www.1b23.com
public byte[] createImage2(String processInstanceId) {
       //1.獲取當前的流程實例
       ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
       String processDefinitionId = null;
       List<String> activeActivityIds = null;
       //2.獲取全部的歷史軌跡對象
       List<HistoricActivityInstance> list = historyService.createHistoricActivityInstanceQuery()
               .processInstanceId(processInstanceId).list();
       Map<String, HistoricActivityInstance> hisActivityMap = new HashMap<>();
       list.forEach(historicActivityInstance -> {
           if (!hisActivityMap.containsKey(historicActivityInstance.getActivityId())) {
               hisActivityMap.put(historicActivityInstance.getActivityId(), historicActivityInstance);
           }
       });
       //3. 獲取流程定義id和高亮的節點id
       if (processInstance != null) {
           //3.1. 正在運行的流程實例
           processDefinitionId = processInstance.getProcessDefinitionId();
           activeActivityIds = runtimeService.getActiveActivityIds(processInstanceId);
       } else {
           //3.2. 已經結束的流程實例
           HistoricProcessInstance historicProcessInstance = historyService.createHistoricProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
           processDefinitionId = historicProcessInstance.getProcessDefinitionId();
           activeActivityIds = new ArrayList<>();
           List<EndEvent> endEvents = bpmnModelService.findEndFlowElement(processDefinitionId);
           List<String> finalActiveActivityIds = activeActivityIds;
           endEvents.forEach(endEvent -> {
               if (hisActivityMap.containsKey(endEvent.getId())) {
                   finalActiveActivityIds.add(endEvent.getId());
               }
           });
       }
       //4. 獲取流程定義的全部節點信息
       List<FlowNode> flowNodes = bpmnModelService.findFlowNodes(processDefinitionId);
       Map<String, FlowNode> activityMap = flowNodes.stream().collect(Collectors.toMap(FlowNode::getId, flowNode -> flowNode));
       List<String> highLightedFlows = new ArrayList<>();
       //5. 遞歸獲得高亮線
       activeActivityIds.forEach(activeActivityId -> this.getHighLightedFlows(activityMap, hisActivityMap, activeActivityId, highLightedFlows, activeActivityId));
       //6. 獲取bpmnModel對象
       BpmnModel bpmnModel = bpmnModelService.getBpmnModelByProcessDefId(processDefinitionId);
       //7. 生成圖片流
       InputStream inputStream = flowProcessDiagramGenerator.generateDiagram(bpmnModel, activeActivityIds, highLightedFlows);
       //8. 轉化成byte便於網絡傳輸
       byte[] datas = IoUtil.readInputStream(inputStream, "image inputStream name");
       return datas;
   }

遞歸獲取高
//www.1b23.com
private void getHighLightedFlows(Map<String, FlowNode> flowNodeMap,
            Map<String, HistoricActivityInstance> hisActivityMap,
            String activeActivityId,
            List<String> highLightedFlows,
            String oldActivityId) {
        FlowNode flowNode = flowNodeMap.get(activeActivityId);
        List<SequenceFlow> incomingFlows = flowNode.getIncomingFlows();
        for (SequenceFlow sequenceFlow : incomingFlows) {
            String sourceRefId = sequenceFlow.getSourceRef();
            if (hisActivityMap.containsKey(sourceRefId) && !oldActivityId.equals(sourceRefId)) {
                highLightedFlows.add(sequenceFlow.getId());
                this.getHighLightedFlows(flowNodeMap, hisActivityMap, sourceRefId, highLightedFlows, oldActivityId);
            } else {
 
          if (hisActivityMap.containsKey(sourceRefId)){
              highLightedFlows.add(sequenceFlow.getId());
          }
          break; 
} } }
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