aspectj

一起玩转微服务（13）——AOP

由 别等时光非礼了梦想. 提交于 2020-07-26 23:46:20
一、什么是AOP编程 AOP: Aspect Oriented Programming 面向切面编程。 　　面向切面编程(也叫面向方面)：Aspect Oriented Programming(AOP),是目前软件开发中的一个热点。利用AOP可以对业务逻辑的各个部分进行隔离，从而使得业务逻辑各部分之间的耦合度降低，提高程序的可重用性，同时提高了开发的效率。 　　AOP是OOP的延续，是（Aspect Oriented Programming）的缩写，意思是面向切面（方面）编程。 　　主要的功能是： 日志记录，性能统计，安全控制，事务处理，异常处理 等等。 　　主要的意图是：将日志记录，性能统计，安全控制，事务处理，异常处理等代码从业务逻辑代码中划分出来，通过对这些行为的分离，我们希望可以将它们独立到非指导业务逻辑的方法中，进而改 变这些行为的时候不影响业务逻辑的代码。 注意：AOP不是一种技术，实际上是编程思想。凡是符合AOP思想的技术，都可以看成是AOP的实现。 二、AOP编程思想 功能： 让关注点代码与业务代码分离！ 关注点 关注点,重复代码就叫做关注点； 切面 关注点形成的类，就叫切面(类)！ 面向切面编程，就是指 对很多功能都有的重复的代码抽取，再在运行的时候网业务方法上动态植入“切面类代码”。 切入点 执行目标对象方法，动态植入切面代码。 可以通过切入点表达式

@Transactional on aspect advice possible?

由 蹲街弑〆低调 提交于 2020-06-25 05:42:41
问题 Can I apply the @Transactional tag to an aspect advice? I'm trying to wrap all calls to the service layer (com.mycompany.app.myapp.service.*) in a transaction using aspects. My aspect is properly intercepting the calls to the service layer, but I can't figure out how to start a transaction. I thought I could apply the @Transactional tag and because I've got the tag, it'd pick it up and begin the transaction. What am I missing? XML configuration: <bean id="systemArchitectureAspect" class="com

Spring AOP works without @EnableAspectJAutoProxy?

由 不问归期 提交于 2020-06-13 17:57:47
问题 I am learning Spring (currently its AOP framework). Even though all sources I've read say that to enable AOP one needs to use @EnableAspectJAutoProxy annotation (or its XML counterpart) my code seems to work with annotation commented out. Is that because I use Lombok or Spring Boot (v. 1.5.9.RELEASE, dependent on Spring v. 4.3.13.RELEASE)? Minimal example follows: build.gradle buildscript { ext { springBootVersion = '1.5.9.RELEASE' } repositories { mavenCentral() } dependencies { classpath(

Spring AOP works without @EnableAspectJAutoProxy?

由 Deadly 提交于 2020-06-13 17:57:05
问题 I am learning Spring (currently its AOP framework). Even though all sources I've read say that to enable AOP one needs to use @EnableAspectJAutoProxy annotation (or its XML counterpart) my code seems to work with annotation commented out. Is that because I use Lombok or Spring Boot (v. 1.5.9.RELEASE, dependent on Spring v. 4.3.13.RELEASE)? Minimal example follows: build.gradle buildscript { ext { springBootVersion = '1.5.9.RELEASE' } repositories { mavenCentral() } dependencies { classpath(

AspectJ - pointcut for methods of interface's implementation

由 风流意气都作罢 提交于 2020-05-28 20:07:33
问题 I have several implementations of SomeInterface. The question is what is the pointcut for the method executeSomething in all implementation of SomeInterface. public class SomeImplementation implements SomeInterface { public String executeSomething(String parameter) { // Do something } } public class AnotherImplementation implements SomeInterface { public String executeSomething(String parameter) { // Do something different way } } 回答1: Pointcuts for that method can be either method-execution

AspectJ inter-type field not recognized in advice

由 北慕城南 提交于 2020-05-28 06:53:47
问题 I'm essentially trying to track the number of transfers for an Account class. Reading the docs here: https://www.eclipse.org/aspectj/doc/released/progguide/language-anatomy.html And on slide 48 and 49 here: https://www.eclipse.org/aspectj/doc/released/progguide/language-anatomy.html These tell me I should be able to do something like this: public aspect LoggingAspect { private int Account.transferCount = 0; private int Account.getTransferCount() { return transferCount; } pointcut

AspectJ inter-type field not recognized in advice

由 心已入冬 提交于 2020-05-28 06:53:41
问题 I'm essentially trying to track the number of transfers for an Account class. Reading the docs here: https://www.eclipse.org/aspectj/doc/released/progguide/language-anatomy.html And on slide 48 and 49 here: https://www.eclipse.org/aspectj/doc/released/progguide/language-anatomy.html These tell me I should be able to do something like this: public aspect LoggingAspect { private int Account.transferCount = 0; private int Account.getTransferCount() { return transferCount; } pointcut

Spring / AOP: Best way to implement an activities log in the database

由 我怕爱的太早我们不能终老 提交于 2020-05-26 06:07:32
问题 I have been going through some Spring / AOP tutorials and have somewhat familiarized myself with the related concepts. Now coming to my requirements, I need to create an Activities Log implementation which will save the activities of a logged-in user in the DB which can range from applying for a service or creating new users in case of Admin users, etc. On invocation of any method having an annotation (say @ActivityLog ), this information is to be persisted in the form of actorId ,

Spring / AOP: Best way to implement an activities log in the database

由 前提是你 提交于 2020-05-26 06:07:24
问题 I have been going through some Spring / AOP tutorials and have somewhat familiarized myself with the related concepts. Now coming to my requirements, I need to create an Activities Log implementation which will save the activities of a logged-in user in the DB which can range from applying for a service or creating new users in case of Admin users, etc. On invocation of any method having an annotation (say @ActivityLog ), this information is to be persisted in the form of actorId ,

Difference between @target and @within (Spring AOP)

由 只愿长相守 提交于 2020-05-25 07:24:47
问题 Spring manual says: any join point (method execution only in Spring AOP) where the target object has an @Transactional annotation: @target(org.springframework.transaction.annotation .Transactional) any join point (method execution only in Spring AOP) where the declared type of the target object has an @Transactional annotation: @within(org.springframework.transaction.annotation .Transactional) But I not see any difference between them! I tried to Google it: One difference between the two is
订阅 aspectj