[Improvement] File deletion logic optimization (#11519)

* [Improvement] File deletion logic optimization

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/enums/Status.java

@@ -239,6 +239,7 @@ public enum Status {
     PARENT_RESOURCE_NOT_EXIST(20015, "parent resource not exist", "父资源文件不存在"),
     RESOURCE_NOT_EXIST_OR_NO_PERMISSION(20016, "resource not exist or no permission,please view the task node and remove error resource", "请检查任务节点并移除无权限或者已删除的资源"),
     RESOURCE_IS_AUTHORIZED(20017, "resource is authorized to user {0},suffix not allowed to be modified", "资源文件已授权其他用户[{0}],后缀不允许修改"),
+    RESOURCE_HAS_FOLDER(20018, "There are files or folders in the current directory:{0}", "当前目录下有文件或文件夹[{0}]"),
 
     USER_NO_OPERATION_PERM(30001, "user has no operation privilege", "当前用户没有操作权限"),
     USER_NO_OPERATION_PROJECT_PERM(30002, "user {0} is not has project {1} permission", "当前用户[{0}]没有[{1}]项目的操作权限"),

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/ResourcesServiceImpl.java

@@ -828,8 +828,16 @@ public class ResourcesServiceImpl extends BaseServiceImpl implements ResourcesSe
         Set<Integer> resourceIdSet = resourceProcessMap.keySet();
         // get all children of the resource
         List<Integer> allChildren = listAllChildren(resource, true);
+
         Integer[] needDeleteResourceIdArray = allChildren.toArray(new Integer[allChildren.size()]);
 
+
+        if (needDeleteResourceIdArray.length >= 2){
+            logger.error("can't be deleted,because There are files or folders in the current directory:{}", resource);
+            putMsg(result, Status.RESOURCE_HAS_FOLDER, resource.getFileName());
+            return result;
+        }
+
         //if resource type is UDF,need check whether it is bound by UDF function
         if (resource.getType() == (ResourceType.UDF)) {
             List<UdfFunc> udfFuncs = udfFunctionMapper.listUdfByResourceId(needDeleteResourceIdArray);
@@ -840,6 +848,8 @@ public class ResourcesServiceImpl extends BaseServiceImpl implements ResourcesSe
             }
         }
 
+
+
         if (resourceIdSet.contains(resource.getPid())) {
             logger.error("can't be deleted,because it is used of process definition");
             putMsg(result, Status.RESOURCE_IS_USED);