Grails 创建内部服务类的实例

Question

在 Grails 中，服务默认是单例的。我可以保持这种方式并仍然从控制器创建该服务的内部类的实例吗？

//by default grails makes MyTestService a singlton
class MyTestService{

     public class InnerTest{
          String msg;
          def addMsg(String str){
               this.msg=str;
          }
          def printMsg(){
             println this.msg;
         }
     }

}

在控制器“MyController”中...

def m=myTestService.getInstance().new InnerTest();
//produces " MyTestService.InnerTest cannot be cast to MyTestService.InnerTest"

 def m=myTestService.new InnerTest();
//No signature of method:MyController.InnerTest() 

Answer 1

您应该能够执行以下操作：

class MyTestService{

     public class InnerTest{
          String msg;
          def addMsg(String str){
               this.msg=str;
          }
          def printMsg(){
             println this.msg;
         }
     }

     def InnerTestFactory() {
        new InnerTest()
     }

}

并从您的控制器中使用它：

def m=myTestService.InnerTestFactory();