You can create the Pointcut by simply matching the name of the method. We can use the NameMatchMethodPointcut class for this. In this example when you match “drive” for drive() and drive(speed). Spring does not care about the argument
We will start withe the class Car
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package com.kayak; import org.springframework.stereotype.Component; public class Car { private String name; public void setName(String name) { this.name = name; } public void getName() { System.out.println("Audi"); } public void drive(int speed){ System.out.println("Driving at given speed"); } public void drive(){ System.out.println("Driving"); } } |
Then you have the CarAdvice class with before method
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package com.kayak; import java.lang.reflect.Method; import org.aopalliance.intercept.MethodInterceptor; import org.aopalliance.intercept.MethodInvocation; import org.springframework.aop.MethodBeforeAdvice; public class CarAdvice implements MethodBeforeAdvice { @Override public void before(Method method, Object[] os, Object o) throws Throwable { System.out.println("Inside before Advice"); } } |
You can test the code with following code. You can create the NameMatchMethodPointcut and use addMethodName() to add the name of the method you want to match
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package com.kayak; import org.springframework.aop.Advisor; import org.springframework.aop.Pointcut; import org.springframework.aop.framework.ProxyFactory; import org.springframework.aop.support.DefaultPointcutAdvisor; import org.springframework.aop.support.NameMatchMethodPointcut; public class Test { public static void main(String[] args) { Car target= new Car(); NameMatchMethodPointcut nameMatchPointcut = new NameMatchMethodPointcut(); nameMatchPointcut.addMethodName("drive"); CarAdvice cd= new CarAdvice(); Advisor advisor= new DefaultPointcutAdvisor(nameMatchPointcut,cd ); ProxyFactory pf=new ProxyFactory(); pf.setTarget(target); pf.addAdvisor(advisor); // Get the proxied bean object Car carProxy=(Car)pf.getProxy(); carProxy.drive(40); carProxy.getName(); } } |
You can use this pom.xml file to get dependencies for this project
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<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.codekayak</groupId> <artifactId>SimpleNameMatching</artifactId> <version>1.0-SNAPSHOT</version> <packaging>jar</packaging> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> </properties> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.3.9.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.3.9.RELEASE</version> </dependency> <!-- Spring AOP + AspectJ --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>4.3.9.RELEASE</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjrt</artifactId> <version>1.8.13</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.8.13</version> </dependency> </dependencies> </project> |
Now you can get the following output when you run the application
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--- exec-maven-plugin:1.2.1:exec (default-cli) @ SimpleNameMatching --- Inside before Advice Driving at given speed Inside before Advice Driving Audi |