spring-aop

问题 In a Spring rest application, every single URL must start with an application id (appId). This appId must be validated in every single rest service. Instead of duplicating code, I tried to create an @Aspect with an @Around advice. This is correctly executed before any rest method. However, if the application id is unknown, I do not want neither to create a stack trace or neither to return a 200 (response OK). Instead I do want to return a BAD_REQUEST response code. If I throw an exception in

问题 I am new to Spring AOP and was reading the docs for pointcut designators. Both this and target designators sound same to me. Can someone explain with a better/cleaner example? Thanks this - limits matching to join points (the execution of methods when using Spring AOP) where the bean reference (Spring AOP proxy) is an instance of the given type eg: this(com.xyz.service.AccountService) any join point (method execution only in Spring AOP) where the proxy implements the AccountService interface:

问题 Here is the problem - I was using @Async provided by Spring to execute some methods asynchronously. However, because it is proxy based, it wouldn't work if the method is called from within the same class. I do need my async methods to be called from within the same class. I know if I use AspectJ instead of Spring AOP, I will be able to do that. So my question is, is there a way to use Spring's @Async and load time weave it? Or, is there an AspectJ based async execution aspect already written

问题 Use load-time weaving, pure AspectJ. We have 2 annotations @Time and @Count , and a few annotated methods. @Time (name="myMethod1Time") @Count (name="myMethod1Count") public void myMethod1(){..}; @Time (name="myMethod2Time") public void myMethod2(){..}; @Count (name="myMethod3Count") public void myMethod3(){..}; Now I am defining my own around aspect for myMethod1 which has multiple annotations: // multiple annotations, not working @Around("@annotation(time) && @annotation(count)) public

问题 Here is a question: I have method digest(byte[] data) . It should be private, because we really don't need it outside a class, however i'll not die if i make it public, if it helps. The question is: can i somehow attach interceptor to it? The thing is that it is not called like getBean('MyBean').digest() , it is called through getBean('MyBean').sign(data) where sign is smth like public byte[] sign(byte[] data){ ... b = digest(data); ... return signature; } Thx. 回答1: Even if the method is

问题 I want to create an Aspect over a Jersey controller to measure how long the services take to be executed. I'm fighting against my pointcut since it isn't detected and my aspect never gets launched. I have tried using lots of pointcuts like: execution(@Monitor * *.*(..)) execution(public * *(..)) change the order of @Aspect and @Component Added a pointcut like this: @Pointcut("execution(@Monitor * *.*(..))") public void monitorRequestTargets(){} @Around("monitorRequestTargets()") Tried using

问题 I am studying Spring AOP module and I have some doubts about how exactly works the AROUND advice. Reading the official documentation: http://docs.spring.io/spring/docs/current/spring-framework-reference/html/aop.html I can read this about the AROUND ADVICE : Around advice: Advice that surrounds a join point such as a method invocation. This is the most powerful kind of advice. Around advice can perform custom behavior before and after the method invocation. It is also responsible for choosing

问题 Suppose I want to find all classes annotated with @Controller, I would create this pointcut: @Pointcut("within(@org.springframework.stereotype.Controller *)") public void controllerPointcut() {} But those controllers annotated with @RestController can not be found. Since RestController itself is annoatated with @Controller. Any idea on how to find classes annotated either with @Controller or @RestController without having to create two Pointcuts ? ===== edit ==== My real intention here is as

问题 I came cross a article about AOP, there it is mentioned that Aspect weaving can happen during the compile time, class loading time and during runtime. In java, I could imagine, rather understand, how aspect weaving would actually happens during compile time. Proxy class are generated during class compilation itself(with aspect enabled on project). Generated bytecode would have proxy code. But I am still wondering what exactly (actually) happen, during class loading time weaving and runtime

问题 I am trying my hands at spring aop and below the spring config file: <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema