activiti7 流程撤回的两种实现思路
/**
* @param processInstanceBusinessKey BUSINESS_KEY_
* @param userName 当前用户
**/
public void rollBackToAssignWoekFlow(String processInstanceBusinessKey, String userName){
ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceBusinessKey(processInstanceBusinessKey).singleResult();
if(processInstance == null) {
throw new CustomException("撤回失败，失败原因：未查到流程信息！");
}
String processInstanceId = processInstance.getProcessInstanceId();
//获取流程模型
BpmnModel bpmnModel = repositoryService.getBpmnModel(processInstance.getProcessDefinitionId());
if (null == bpmnModel) {
throw new CustomException("撤回失败，失败原因：未查到流程信息！");
}
Process process = bpmnModel.getProcesses().get(0);
// 当前待办的任务(激活的任务)
org.activiti.engine.task.Task task = taskService.createTaskQuery().processInstanceId(processInstanceId).active().singleResult();
// 获取当前节点
FlowNode currentFlowNode = (FlowNode) bpmnModel.getMainProcess().getFlowElement(task.getTaskDefinitionKey());
// List<SequenceFlow> outgoingFlows1 = ();
// 退回的目标节点(当前用户已办理的最新节点)
List<HistoricTaskInstance> list = historyService.createHistoricTaskInstanceQuery().processInstanceId(processInstanceId)
.taskAssignee(userName).orderByHistoricTaskInstanceEndTime().desc().list();
HistoricTaskInstance historicTaskInstance = list.get(0);
FlowNode targetFlowNode = (FlowNode) process.getFlowElement(historicTaskInstance.getTaskDefinitionKey());
// 动态创建从当前任务节点到目标节点的连线
SequenceFlow sequenceFlow4 = genarateSequenceFlow("test001","test-name",currentFlowNode,targetFlowNode,null,process);
// ().clear();
List<SequenceFlow> oldOutgoingFlows = currentFlowNode.getOutgoingFlows();
// 将当前节点的向外连线设置成创建的连线
currentFlowNode.setOutgoingFlows(List.of(sequenceFlow4));
task.setAssignee(userName);
taskService.complete(task.getId()); // 完成任务
currentFlowNode.setOutgoingFlows(oldOutgoingFlows); // 完成任务后将原来的连线设置回当前任务节点
}