update(REQ-2324) - 业务节点如果设置的是“业务指定审批人”，且业务传入了空审批人，则服务端主动驳回该实例

workflow-engine-common/src/main/java/cn/axzo/workflow/common/model/request/bpmn/task/BpmnActivitySetAssigneeDTO.java

@@ -6,7 +6,6 @@ import lombok.Data;
 
 import javax.validation.Valid;
 import javax.validation.constraints.NotBlank;
-import javax.validation.constraints.NotEmpty;
 import java.util.List;
 
 /**
@@ -42,11 +41,12 @@ public class BpmnActivitySetAssigneeDTO {
     private String processInstanceId;
 
     /**
-     * 需要设置的审批人, 业务侧自行去重, 请根据 personId 进行去重, 如果发现有重复, 并抛出异常
+     * 需要设置的审批人, 业务侧自行去重, 请根据 personId 进行去重, 如果发现有重复, 并抛出异常.
+     * <p>
+     * 业务如果传入的 assigners 集合为空, 引擎则会对该流程进行自动驳回处理，且驳回意见为“业务未指定审批人”
      */
     @ApiModelProperty(value = "审批人集合信息", notes = "业务传参时,需要注意去重")
     @Valid
-    @NotEmpty(message = "审批人不能为空")
     private List<BpmnTaskDelegateAssigner> assigners;
 
     /**

workflow-engine-core/src/main/java/cn/axzo/workflow/core/service/impl/BpmnProcessActivityServiceImpl.java

@@ -2,14 +2,17 @@ package cn.axzo.workflow.core.service.impl;
 
 import cn.axzo.workflow.common.model.request.bpmn.task.BpmnActivitySetAssigneeDTO;
 import cn.axzo.workflow.core.common.exception.WorkflowEngineException;
+import cn.axzo.workflow.core.engine.cmd.CustomAbortProcessInstanceCmd;
 import cn.axzo.workflow.core.engine.cmd.CustomBizSpecifyAssigneeToTaskCmd;
 import cn.axzo.workflow.core.service.BpmnProcessActivityService;
+import cn.axzo.workflow.core.service.ExtAxHiTaskInstService;
 import lombok.extern.slf4j.Slf4j;
 import org.flowable.common.engine.impl.interceptor.CommandExecutor;
 import org.flowable.engine.RuntimeService;
 import org.flowable.engine.runtime.Execution;
 import org.flowable.spring.SpringProcessEngineConfiguration;
 import org.springframework.stereotype.Service;
+import org.springframework.util.CollectionUtils;
 
 import javax.annotation.Resource;
 import java.util.Objects;
@@ -24,6 +27,8 @@ public class BpmnProcessActivityServiceImpl implements BpmnProcessActivityServic
     @Resource
     private RuntimeService runtimeService;
     @Resource
+    private ExtAxHiTaskInstService extAxHiTaskInstService;
+    @Resource
     private SpringProcessEngineConfiguration processEngineConfiguration;
 
     @Override
@@ -38,6 +43,10 @@ public class BpmnProcessActivityServiceImpl implements BpmnProcessActivityServic
     @Override
     public void setAssignee(BpmnActivitySetAssigneeDTO dto) {
         CommandExecutor commandExecutor = processEngineConfiguration.getCommandExecutor();
+        if (CollectionUtils.isEmpty(dto.getAssigners())) {
+            Execution execution = runtimeService.createExecutionQuery().executionId(dto.getTriggerId()).singleResult();
+            commandExecutor.execute(new CustomAbortProcessInstanceCmd(execution.getProcessInstanceId(), null, "业务未指定审批人", extAxHiTaskInstService));
+        }
         commandExecutor.execute(new CustomBizSpecifyAssigneeToTaskCmd(dto.getTriggerId(), dto.getAssigners()));
     }
 }