activiti7的流程圖、模闆圖及子流程圖展示

activiti7的流程圖、模闆圖及子流程圖展示

流程圖需展示流程完成情況，模闆圖根據key找到最新模闆展示。子流程需從主流程中找到CallActiviti的節點，找到對應的子流程id(已啟動)或模闆key(未啟動)，再進行對應的流程或模闆展示。

//根據流程id 展示流程圖

private void outPutImageByInstanceId(String instanceId,HttpServletResponse response){

if(StringUtils.isEmpty(instanceId)){

LOG.info(“流程id為空!”);

return;

}

LOG.info(“檢視完整流程圖！流程執行個體ID:{}”, instanceId);

// 擷取流程執行個體（id查詢隻能查到單獨的記錄,如果是其他條件，此處需換為list）

HistoricProcessInstance processInstance = historyService.createHistoricProcessInstanceQuery().processInstanceId(instanceId).singleResult();

if (processInstance == null) {

LOG.error(“流程執行個體ID:{}沒查詢到流程執行個體！”, instanceId);

return;

}

// 根據流程對象擷取流程對象模型

BpmnModel bpmnModel = repositoryService.getBpmnModel(processInstance.getProcessDefinitionId());

// 構造曆史流程查詢
    HistoricActivityInstanceQuery historyInstanceQuery = historyService.createHistoricActivityInstanceQuery().processInstanceId(instanceId);
    // 查詢曆史節點
    List<HistoricActivityInstance> historicActivityInstanceList = historyInstanceQuery.orderByHistoricActivityInstanceStartTime().asc().list();
    if (historicActivityInstanceList == null || historicActivityInstanceList.size() == 0) {
        LOG.info("流程執行個體ID:{}沒有曆史節點資訊！", instanceId);
        outPutImg(response, bpmnModel, null, null);
        return;
    }
    // 已執行的節點ID集合(将historicActivityInstanceList中元素的activityId字段取出封裝到executedActivityIdList)
    List<String> executedActivityIdList = historicActivityInstanceList.stream().map(item -> item.getActivityId()).collect(Collectors.toList());
    // 擷取流程定義
    ProcessDefinitionEntity processDefinition = (ProcessDefinitionEntity) ((RepositoryServiceImpl) repositoryService).getDeployedProcessDefinition(processInstance.getProcessDefinitionId());
    //擷取流程線
    List<String> flowIds = ActivitiUtils.getHighLightedFlows(bpmnModel, processDefinition, historicActivityInstanceList);
    //輸出圖像
    outPutImg(response, bpmnModel, flowIds, executedActivityIdList);
}
           

//展示模闆圖(根據流程定義key展示最新的模闆圖,此處也可以換為根據模闆key展示最新模闆圖)

public void showImgTemplate(String processDefinitonKey, HttpServletResponse response) {

if (StringUtils.isEmpty(processDefinitonKey)) return;

//根據key查詢最新的流程定義

List list = repositoryService.createProcessDefinitionQuery().processDefinitionKey(processDefinitonKey).latestVersion().list();

if(ListUtils.isEmpty(list)){

LOG.error(“流程定義Key:{}沒查詢到流程定義！”, processDefinitonKey);

return;

}

// 根據流程對象擷取流程對象模型

BpmnModel bpmnModel = repositoryService.getBpmnModel(list.get(0).getId());

//輸出圖像

outPutImg(response, bpmnModel, null, null);

}

//圖像輸出（圖像均為svg格式,activiti7如何指定圖像格式，還待完善）

private void outPutImg(HttpServletResponse response, BpmnModel bpmnModel, List flowIds, List executedActivityIdList) {

InputStream imageStream = null;

try {

if(null == flowIds && null ==executedActivityIdList){

imageStream = processDiagramGenerator.generateDiagram(bpmnModel,“宋體”, “微軟雅黑”, “黑體”);

}else{

imageStream = processDiagramGenerator.generateDiagram(bpmnModel, executedActivityIdList, flowIds,

“宋體”, “微軟雅黑”, “黑體”, true, “png”);

}

// 輸出資源内容到相應對象

byte[] b = new byte[1024];

int len;

while ((len = imageStream.read(b, 0, 1024)) != -1) {

response.getOutputStream().write(b, 0, len);

}

response.getOutputStream().flush();

response.setContentType(“image/png”);

} catch (Exception e) {

LOG.error(“流程圖輸出異常！”, e);

} finally { // 流關閉

if (null != imageStream) {

try {

imageStream.close();

} catch (IOException e) {

LOG.error(“流程圖輸入流關閉異常！”, e);

imageStream = null;

}

}

}

}

//查詢流程圖節點資訊(可根據節點的位置資訊，定位圖中每個節點位置。添加相應的前端事件，展示節點資訊。也可以根據其中callActiviti的節點，找到子流程的流程id或key，用于展示子流程圖)

public List getImgNode(String instanceId ) {

String instanceId = inst.getInstanceId();

LOG.info(“檢視完整流程圖！流程執行個體ID:{}”, instanceId);

HistoricProcessInstance processInstance = historyService.createHistoricProcessInstanceQuery().processInstanceId(instanceId).singleResult();

if (processInstance == null) {

LOG.info(“流程執行個體ID:{}沒查詢到流程執行個體！”, instanceId);

result.setDetail(“activiti流程執行個體查詢為空”);

return result;

}

// 根據流程對象擷取流程對象模型

BpmnModel bpmnModel = repositoryService.getBpmnModel(processInstance.getProcessDefinitionId());

List nodeList = getNodeByModel(bpmnModel,inst.getTemplateId(),inst,null);

return nodeList ;

}

//根據BpmnModel查詢補充節點資訊

public List getNodeByModel(BpmnModel bpmnModel,String templateId) {

List nodeList = new ArrayList<>();

List<org.activiti.bpmn.model.Process> ps = bpmnModel.getProcesses();

if (ps != null && ps.size() > 0) {

for (Process process : ps) {

Collection elements = process.getFlowElements();

if (elements != null && elements.size() > 0) {

for (FlowElement el : elements) {

try{

if (el instanceof UserTask) {

BpmImageNode bpmNode = new BpmImageNode();

bpmNode.setType(“UserTask”);

UserTask ut = (UserTask) el;

GraphicInfo artifactGraphicInfo = bpmnModel.getGraphicInfo(ut.getId());//id為baseElement的id

if (artifactGraphicInfo != null) {

bpmNode.setX(artifactGraphicInfo.getX());

bpmNode.setY(artifactGraphicInfo.getY());

bpmNode.setWidth(artifactGraphicInfo.getWidth());

bpmNode.setHeight(artifactGraphicInfo.getHeight());

}

//TODO 此處根據自己的需要完善邏輯

//可補充任務送出資訊，任務表單資訊等節點資訊

nodeList.add(bpmNode);

}else if(el instanceof CallActivity){

CallActivity ut = (CallActivity) el;

String processDefinitonKey = ((CallActivityBehavior)(ut.getBehavior())).getProcessDefinitonKey();

BpmImageNode bpmNode = new BpmImageNode();

bpmNode.setType(“CallActivity”);

List wfInstanceChildList = null;

//TODO WfInstanceChild是自己系統儲存的流程資訊，此處根據自己項目需要完善

if(ListUtils.isEmpty(wfInstanceChildList)){

//子流程未開始

bpmNode.setTemplateKey(processDefinitonKey);

}else{

//子流程已開始

List instanceIds = new ArrayList<>();

//TODO 此處可根據自己的項目來查詢子流程的Id

bpmNode.setInstanceIds(instanceIds);

}

GraphicInfo artifactGraphicInfo = bpmnModel.getGraphicInfo(ut.getId());//id為baseElement的id

if (artifactGraphicInfo != null) {

bpmNode.setX(artifactGraphicInfo.getX());

bpmNode.setY(artifactGraphicInfo.getY());

bpmNode.setWidth(artifactGraphicInfo.getWidth());

bpmNode.setHeight(artifactGraphicInfo.getHeight());

}

nodeList.add(bpmNode);

}

}catch(Exception e){

LOG.error(e.getMessage(),e);

}

}

}

}

}

return nodeList;

}