5 Notifications and 3 ways to load notifications in spring

5 Notifications and 3 ways to load notifications in spring

5 kinds of notifications in spring

Front notification: Code:/** * Forward notification: Called before executing the method.        The front notification class needs to implement the Methodbeforeadvice interface */public class Empbeforeadvice implements Methodbeforeadvice {@Override public void before (method arg0, object[] arg1, Object target) throws Throwable {System.out.            println ("Here is the Before method");            System.out.println ("Method name:" +arg0+ "method parameter:" +arg1.length+ "target object:" +target);                    System.out.println ("==================="); }    }

Post notification: Code:/**    *  post notification: Called after the call is done, the post notification class is to implement the Afterreturningadvice interface    * */   public class empafteradvice implements afterreturningadvice {         @Override        public void afterreturning (object arg0 ,  method arg1, object[] arg2,                 object target)  throws throwable {            // todo auto-generated method stub             system.out.println ("Here is the Afterreturning method.") ");            system.out.println ("returned objects:"  + arg0  +  the name of the method called: " + arg1 + " Method parameters: "                    + arg2.length +  "target object:"  + target);            system.out.println ("======================");           }   }  

 

Surround notification: Code:/**    *  surround notification: Called before and after the method is invoked. The class needs to inherit Methodinterceptor interface    * */   public class empreturning implements methodinterceptor{         @Override        public object invoke (methodinvocation arg0)  throws throwable {           // todo  auto-generated method stub             System.out.println ("Start of the Invoke method");            object obj=arg0.proceed ()//Let him execute the target method             SYSTEM.OUT.PRINTLN ("The end of the Invoke method");            system.out.println ("=====================");            return obj;//If you return a null, you will get an error       &NBSP}   }  

 

Exception notification: Code:/**    *  Exception Notification: Executes the notification when an exception is executed for the target class. This class inherits the Throwingadivice interface    * */   public class empexception implements  throwsadvice {       public void afterthrowing (Method  Method, object[] args, object target,                 exception ex)  {            system.out.println ("Here is the Afterthrowing method.") ");            system.out.println (the name of the calling method is: " + method Number of parameters for the  +  method: " + args.length                     +  the target object of the call: '  + target +  ' throws an exception: '  + EX);            system.out.println ("================");        }   }  

Reference notification: to be written

3 Ways to load notifications

Loading mode with proxy class: Code: <!--  Pre-notification  -->        <bean id= " Empbeforeadvice " class=" Cn.csdn.aop.EmpBeforeAdvice " />        <!- -  post notification (processing after the action of the method)  -->        <bean id= "Empafteradvice"  class= "Cn.csdn.aop.EmpAfterAdvice"  />        <!--  Surround notification ( Method before and after processing)  -->        <bean id= "empreturning"  class= " Cn.csdn.aop.EmpReturning " />        <!--  Exception notification (when a bug occurs during method execution)  -->        <bean id= "empexception"  class= " Cn.csdn.aop.EmpException " />        <!--  Target class  -->         <bean id= "Empserviceimpl"  class= "Cn.csdn.service.EmpServiceImpl" >            <property name= "Worktime" >                 <value>my worktime is 8 hours!</value>             </property>         </bean>        <!--  Configure a static advisor -->         <bean id= "Slbeforeadvistor"             class= "Org.springframework.aop.support.NameMatchMethodPointcutAdvisor" >             <property name= "Advice"  ref= "Empbeforeadvice" ></property>            <property name= "Mappednames" >                 <list>                     <value>sleep</value>                </list>            </property>        </bean >        <!--  Configure another static advisor -->         <bean id= "Wkaroundadvisor"            class= " Org.springframework.aop.support.NameMatchMethodPointcutAdvisor ">             <property name= "Advice"  ref= "empreturning" ></property>            <property name= "Mappednames" >                 <list>       & nbsp;            <value>work</value>                 </list>             </property>        </bean>        <!--  Agent-->        <bean id= "Proxyfactorybean"  class= "Org.springframework.aop.framework.ProxyFactoryBean" >               <!--  Set the name of the agent proxyinterfaces -->            <property name= "Proxyinterfaces" >                 <list>                     <value>cn.csdn.service.emPservice</value>                < /list>            </property>             <!--  Intercept name  -->             <property name= "Interceptornames" >                 <list>                     <!--define that notification in this, load that notice                         < Value>empbeforeadvice</value> <value>empafteradvice</value>                          <value>Empreturning</value> <value>empexception</value>                     -->                     <value>slbeforeadvistor </value>                     <value>wkaroundAdvisor</value>                    </list>             </property>               <!--  Target object  -->            <property name= "Target"  ref= "Empserviceimpl"  />        </bean>  

 

Default automatic load Notification: Code: <!--  Forward notification  -->        <bean id= " Empbeforeadvice " class=" Cn.csdn.aop.EmpBeforeAdvice " />        <!- -  post notification (processing after the action of the method)  -->        <bean id= "Empafteradvice"  class= "Cn.csdn.aop.EmpAfterAdvice"  />        <!--  Surround notification ( Method before and after processing)  -->        <bean id= "empreturning"  class= " Cn.csdn.aop.EmpReturning " />        <!--  Exception notification (when a bug occurs during method execution)  -->        <bean id= "empexception"  class= " Cn.csdn.aop.EmpException " />        <!--  Target class  -->         <bean id= "Empserviceimpl"  class= "Cn.csdn.service.EmpServiceImpl" >             <property name= "Worktime" >                 <value>my worktime is 8 hours!</value>             </property>         </bean>           <!--  Configure a static advisor -->