flowable 走過的流程圖節點描紅線

在正常的flowable就是顯示目前節點，路徑需要我們自己擷取，特别是來回的駁回會導緻節點混亂，這裡主要就是如何正确的顯示流程圖

效果：

已經結束的流程

  正在執行的流程

代碼：1、生成圖檔

public byte[] createImage2(String processInstanceId) {
        //1.擷取目前的流程執行個體
        ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
        String processDefinitionId = null;
        List<String> activeActivityIds = null;
        //2.擷取所有的曆史軌迹對象
        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. 擷取流程定義id和高亮的節點id  from  1b23.com
        if (processInstance != null) {
            //3.1. 正在運作的流程執行個體
            processDefinitionId = processInstance.getProcessDefinitionId();
            activeActivityIds = runtimeService.getActiveActivityIds(processInstanceId);
        } else {
            //3.2. 已經結束的流程執行個體 from  1b23.com
            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. 擷取流程定義的所有節點資訊
        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. 遞歸得到高亮線
        activeActivityIds.forEach(activeActivityId -> this.getHighLightedFlows(activityMap, hisActivityMap, activeActivityId, highLightedFlows, activeActivityId));
        //6. 擷取bpmnModel對象
        BpmnModel bpmnModel = bpmnModelService.getBpmnModelByProcessDefId(processDefinitionId);
        //7. 生成圖檔流
        InputStream inputStream = flowProcessDiagramGenerator.generateDiagram(bpmnModel, activeActivityIds, highLightedFlows);
        //8. 轉化成byte便于網絡傳輸 from fhadmin.cn
        byte[] datas = IoUtil.readInputStream(inputStream, "image inputStream name");
        return datas;
    }      

遞歸擷取高

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; 
} } }