public void revoke(String objId) throws Exception {
Task task = taskService.createTaskQuery().processInstanceBusinessKey(objId).singleResult();
if(task==null) {
throw new ServiceException("流程未启动或已执行完成，无法撤回");
}
LoginUser loginUser = SessionContext.getLoginUser();
List<HistoricTaskInstance> htiList = historyService.createHistoricTaskInstanceQuery()
.processInstanceBusinessKey(objId)
.orderByTaskCreateTime()
.asc()
.list();
String myTaskId = null;
HistoricTaskInstance myTask = null;
for(HistoricTaskInstance hti : htiList) {
if(loginUser.getUsername().equals(hti.getAssignee())) {
myTaskId = hti.getId();
myTask = hti;
break;
}
}
if(null==myTaskId) {
throw new ServiceException("该任务非当前用户提交，无法撤回");
}
String processDefinitionId = myTask.getProcessDefinitionId();
ProcessDefinitionEntity processDefinitionEntity = (ProcessDefinitionEntity) repositoryService.createProcessDefinitionQuery().processDefinitionId(processDefinitionId).singleResult();
BpmnModel bpmnModel = repositoryService.getBpmnModel(processDefinitionId);
//变量
// Map<String, VariableInstance> variables = runtimeService.getVariableInstances(currentTask.getExecutionId());
String myActivityId = null;
List<HistoricActivityInstance> haiList = historyService.createHistoricActivityInstanceQuery()
.executionId(myTask.getExecutionId()).finished().list();
for(HistoricActivityInstance hai : haiList) {
if(myTaskId.equals(hai.getTaskId())) {
myActivityId = hai.getActivityId();
break;
}
}
FlowNode myFlowNode = (FlowNode) bpmnModel.getMainProcess().getFlowElement(myActivityId);
Execution execution = runtimeService.createExecutionQuery().executionId(task.getExecutionId()).singleResult();
String activityId = execution.getActivityId();
logger.warn("------->> activityId:" + activityId);
FlowNode flowNode = (FlowNode) bpmnModel.getMainProcess().getFlowElement(activityId);
//记录原活动方向
List<SequenceFlow> oriSequenceFlows = new ArrayList<SequenceFlow>();
oriSequenceFlows.addAll(flowNode.getOutgoingFlows());
//清理活动方向
flowNode.getOutgoingFlows().clear();
//建立新方向
List<SequenceFlow> newSequenceFlowList = new ArrayList<SequenceFlow>();
SequenceFlow newSequenceFlow = new SequenceFlow();
newSequenceFlow.setId("newSequenceFlowId");
newSequenceFlow.setSourceFlowElement(flowNode);
newSequenceFlow.setTargetFlowElement(myFlowNode);
newSequenceFlowList.add(newSequenceFlow);
flowNode.setOutgoingFlows(newSequenceFlowList);
Authentication.setAuthenticatedUserId(loginUser.getUsername());
taskService.addComment(task.getId(), task.getProcessInstanceId(), "撤回");
Map<String,Object> currentVariables = new HashMap<String,Object>();
currentVariables.put("applier", loginUser.getUsername());
//完成任务
taskService.complete(task.getId(),currentVariables);
//恢复原方向
flowNode.setOutgoingFlows(oriSequenceFlows);
}https://blog.csdn.net/yongboyhood/article/details/70833021
