flowable 走过的流程 红线标注

在正常的flowable就是显示当前节点,路径需要我们自己获取,特别是来回的驳回会导致节点混乱,这里主要就是如何正确的显示流程图

效果:

已经结束的流程

  正在执行的流程

 代码:1、生成图片

// 源码 www.1b23.com
public byte[] createImage2(String processInstanceId) {
       //1.获取当前的流程实例
       ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();
       String processDefinitionId = null;
       List<String> activeActivityIds = null;
       //2.获取所有的历史轨迹对象
       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. 获取流程定义id和高亮的节点id
       if (processInstance != null) {
           //3.1. 正在运行的流程实例
           processDefinitionId = processInstance.getProcessDefinitionId();
           activeActivityIds = runtimeService.getActiveActivityIds(processInstanceId);
       } else {
           //3.2. 已经结束的流程实例
           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. 获取流程定义的所有节点信息
       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. 递归得到高亮线
       activeActivityIds.forEach(activeActivityId -> this.getHighLightedFlows(activityMap, hisActivityMap, activeActivityId, highLightedFlows, activeActivityId));
       //6. 获取bpmnModel对象
       BpmnModel bpmnModel = bpmnModelService.getBpmnModelByProcessDefId(processDefinitionId);
       //7. 生成图片流
       InputStream inputStream = flowProcessDiagramGenerator.generateDiagram(bpmnModel, activeActivityIds, highLightedFlows);
       //8. 转化成byte便于网络传输
       byte[] datas = IoUtil.readInputStream(inputStream, "image inputStream name");
       return datas;
   }

递归获取高
//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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转载自blog.51cto.com/14622073/2512999