AOP-SheepAspect

转载https://www.cnblogs.com/InCsharp/p/5902133.html

SheepAspect 简介以及代码示列:

SheepAspect是一个AOP框架为.NET平台，深受AspectJ。它静织目标组件作为一个编译后的任务(编译时把AOP代码植入)。

多有特性时，可根据参数值设置先后进入顺序

下面开始代码实现之旅:

一、新建控制台程序：方案名称：SheepAectTest

二、NuGet上搜索SheepAspect进行安装

三、安装完毕后的样子

成员的切入点类型(SelectMethdos 以下图等):

"saql":

Criteria	Argument	Examples
Name	string	Name: ‘*Customer’ Name: (‘*Service’ | ‘*Repository’)
Namespace	string	!Namespace: ‘System.*’
ImplementsType	Type Pointcut	ImplementsType:’System.Collections.IEnumerable’ ImplementsType: (Name: ‘*Repository’ | Namespace: ‘*.DataContexts’)
AssignableToType	Type Pointcut	AssignableToType:(‘System.Collections.*’ & Interface) AssignableToType: Namespace: ‘System.Collections.*’
HasMethod	Method Pointcut	HasMethod: Name: ‘Get*’ HasMethod: (Public & Args(‘System.Int32’)
HasProperty	Property Pointcut	HasProperty:Name:’Length’ HasProperty:Type:Implements:’*.*Service’
HasField	Field Pointcut	HasField:Name:(‘_createdDate’ | ‘_entryDate’) HasField:((Public & Static) | Protected)
ThisAspect	(none)	ThisAspect Implements:ThisAspect Namespace:’Sheep.*’ & !ThisAspect
HasCustomAttributeType	Type Pointcut	HasCustomAttributeType:ImplementsType:’BindableAttribute’
InheritsType*	Type Pointcut	InheritsType:Namespace:’System.Collections’
Interface*	(none)	Interface !Interface
Abstract*	(none)	Abstract & Name:’*Strategy’
ValueType*	(none)	ValueType & HasMethod:Name:’Equals’
Class*	(none)	Class & Implements:’Sheep.Irepository’

特性植入示列:

一、新建特性

   public class LogAttribute:Attribute
    {
        public string Name { get; set; }

        public LogAttribute(string name)
        {
            Name = name;
        }
    }

二、新建一个测试类TestClass.cs

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public class TestClass {     [Log("获取的第一个方法")]     public string Get()     {         return "test1";     }       public string Get2()     {         return "test2";     } }

三、更改SampleAspect为：HasCustomAttributeType:'SheepAectTest.Attr.LogAttribute'   >  命名空间+类名

四：编写测试代码:

输出结果:

如果我们在AOP中更改结果呢?

输出结果：

获取特性的属性:

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[Aspect]   public class SampleAspect   {       [SelectMethods("HasCustomAttributeType:'SheepAectTest.Attr.LogAttribute'")]       public void PublicMethods() { }         [Around("PublicMethods", Priority = 100)]       public object LogAroundMethod(MethodJointPoint jp)       {             try           {               var log = (LogAttribute)jp.Method.GetCustomAttributes(typeof(LogAttribute), false)[0];               //这样可以获取属性名称:log.Name;               //jp.Args  -> 包含传递参数               var result = jp.Execute();                 if (jp.Method.ReturnType == typeof(void))                   result = "{void}";                 result = "AOP更改结果";               return result;           }           catch (Exception e)           {                 throw;           }       }   }

　　

多个特性注入顺序以：Priority属性值控制优先级较低的值;