Aspectj Puns

I'm currently reading Spring in Action after doing a spring Udemy course and personal project. I would like to learn more about AOP and AspectJ, however most books are written before 2010, and there aren't many tutorial online. Any ideas? I was looking at AspectJ in Action but it is 12 years old at this point...

Hello I need help with ruby and aspectJ 90 minute quiz , PM for details :)

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We already have amazing tools but, how do we use them properly? In this issue, we talk about cross-cutting concerns like logging and constraints validation and how we can modularize them rather than having them scattered throughout our code.

This is the sixth article in a series I've been posting on LinkedIn that describe the Java-based development stack I'm putting together in this quarantine.

by Gavin Fernandez

I have recently joined a new company and their tech stack is a little old. I have no issues at all with an old tech stack but I'm kinda hating on AspectJ. I've never used AspectJ before so my first introduction to it is that it was a pain to setup and it frequently breaks my build when I switch git branches.

Everyone here uses eclipse so until recently I've been using eclipse too. But I have now installed IntelliJ and have everything working. The AspectJ support in IntelliJ seems much better. For example, getting everything working in eclipse requires many manual and tedious steps specifically to get AspectJ working but with IntelliJ I didn't have to do anything at all. It's too early to tell if switching git branches will work better with IntelliJ but I'm hopeful.

So I'm disliking AspectJ a little less now and even thinking to myself, well, it's part of the tech stack so maybe I can learn to like it by using it for things.

Our stack looks like this:

• Java
• AspectJ
• Spring MVC
• Apache Velocity Templates
• Some jquery for the UI.
• JPA (hibernate)
• Oracle over JDBC

At the moment it looks like AspectJ is being used for some kind of dependency injection but I'm not sure exactly what it's doing. The normal dependency injection is being handled by Spring in the usual way. When I ask my colleagues, most people can't give me a straight answer about what AspectJ is actually doing in our code base. (I do know that when it's not working it causes build errors or null pointer exceptions though!)

Anyway, it's a large and old enterprise web application that has had many people (mostly contractors) add features over the years so it's not the cleanest code-base ever. In particular there isn't much of a focus on unit testing here.

So, any suggestions on what AspectJ might do for me? In the short term I'm wondering if I can use it to help me understand the flow of execution. Like, can I use it to intercept method calls and dump values being passed and returned? Can I use it to help debug the velocity templates? The velocity templates here have lots of macros and are a bit of a black hole. Can it intercept and dump database interactions? Could I even cobble together some kind of time travel debugging?

Or can I add some config to AspectJ to help it log what it's doing? Maybe I'll dislike it less if I can see what it's doing.

By the way, I otherwise quite like this job and the team so "get another job" isn't a good choice on a cost-benefit analysis. Even thou

From AspectJ perspective, how would these two annotations work? A Configuration annotated class is not instantiated explicitly, therefore there is no valid join points to be executed, similarly method with Bean annotation is not executed, again explicitly. So, how does advises on these get executed?

Seamer is a refactoring tool for Java, designed to help and get blackboxes under test to enable safe refactorings.

It will wrap your desired method, record all its invocations and results for later replaying in a test-harness.

It can be installed in many ways, but recently i added the possibility to use an annotation.

public class AspectJDemo {

    @Seam("name_of_your_seam")
    public String blackbox(String arg1, Integer arg2) {
        return arg1 + arg2;
    }
}

So you can for example use it in a Spring Framework application.

You just have to bootstrap AspectJ and the SeamerAspect

@RunWith(SpringRunner.class)
public class MissionStateEngineTest {

    @EnableAspectJAutoProxy
    @TestConfiguration
    static class TestConfig {

        @Bean
        public SeamerAspect seamerAspect() {
            return new SeamerAspect();
        }
     
        ...   
    }
    
    ...
}

practical example:
https://github.com/gregorriegler/seamer/blob/master/src/test/java/seamer/AspectJDemoTest.java

I'm fairly certain i'm not the first in doing this, but i've seen a lot of people struggling to setup de-coupled module structures for different purposes. This project is just a basic example of how one could go ahead to get an almost completely decoupled project structure

Git url: https://github.com/Syrou/AutoLoader

So, I'm making a Java library to help with abstraction in application design. Or, rather, I'm seriously considering making this. It's an extension of some patterns I've been using in apps I've made, and I want to take it to a whole new level.

The idea is to use AspectJ to detect when certain things happen with the client application that uses my library. All aspects/pointcuts will be in my library, the client app won't (or doesn't have to, anyway) do anything with that.

I want my aspects to be able to weave with the client app's code (ie, code outside of the jar that they'll be in). I also want this whole thing to be super simple to be used in a client app.

So, to make this work, is it as simple as requiring that the AspectJ dependencies be in the classpath? Or is there more to it?

I'm reading about Aspectj and trying to understand how compile-time weaving works.

My understanding is that ajc compiles and weaves AspectJ and Java source to produce bytecode for the JVM. I don't doubt the quality of ajc but are there any concerns for using ajc in lieu of javac? I would think that javac is more maintained and robust.

Hi there, people

I need to change the name of a Jbutton in main from "start" to "demo" using only an AspectJ extension. Any pointers would be greatly appreciated. I cannot seem to find any reference online on how to do this.

In scientific publications on how to design AOP software the use cases are super simple (understandably, due to page limits). Also references to real world systems being built using those proposed techniques are in general lacking. So they're not very convincing most of the time.

Books on AOP tend to focus on how to program aspects, their philosophy etc, but not so much on design.

I was hoping people can explain how the design of these systems is done in actual business. I'm especially interested in AspectJ.

I want to log the entrance and exit of every method in a project using aop, while using annotation based aspectj together with spring framework, the logging works fine for beans that are managed with Spring but doesnt work with other java classes or classes that implement no interface, thats about it.

Hi everyone,

 

One of the requirements of a course I'm taking in college is making a small project on the subject of Object-Oriented-Design.

I had an idea to use java's AspectJ library & Reflections to create a simple applet that will let the user weave aspects into existing class/jar files (using GUI).

 

I scoured the internet for over a week just getting bombarded with too much information and having trouble making sense of it, so i would like to ask for some help.

 

a few questions:

1. are there any simple ways to weave aspects into complied code?

i read a little about OSGI and Equinox and got overwhelmed.

2. How would i dynamically load Class files into my app? how would i load entire JAR files with all the class files in it?

i tried using URLClassLoader, some class files gave me ClassNotFound exception and hours searching for a solution on the internet didn't help.

 

To get a sense of scale, the entire project is due in about a month, while I'm also studying.

in-case this wont work or too large of a scale to do in the time-frame mentioned,

my fallback plan is to simply read *.java source files as an input stream and let the user create aspectj files ( *.aj , used with AJDT)

 

would love to hear your thoughts,

Thanks.

I don't want to step on anybody's toes here, but the amount of non-dad jokes here in this subreddit really annoys me. First of all, dad jokes CAN be NSFW, it clearly says so in the sub rules. Secondly, it doesn't automatically make it a dad joke if it's from a conversation between you and your child. Most importantly, the jokes that your CHILDREN tell YOU are not dad jokes. The point of a dad joke is that it's so cheesy only a dad who's trying to be funny would make such a joke. That's it. They are stupid plays on words, lame puns and so on. There has to be a clever pun or wordplay for it to be considered a dad joke.

Again, to all the fellow dads, I apologise if I'm sounding too harsh. But I just needed to get it off my chest.

Do your worst!

I'm surprised it hasn't decade.

For context I'm a Refuse Driver (Garbage man) & today I was on food waste. After I'd tipped I was checking the wagon for any defects when I spotted a lone pea balanced on the lifts.

I said "hey look, an escaPEA"

No one near me but it didn't half make me laugh for a good hour or so!

Edit: I can't believe how much this has blown up. Thank you everyone I've had a blast reading through the replies 😂

It really does, I swear!

They’re on standbi

Pilot on me!!

Nothing, he was gladiator.

Dad jokes are supposed to be jokes you can tell a kid and they will understand it and find it funny.

This sub is mostly just NSFW puns now.

If it needs a NSFW tag it's not a dad joke. There should just be a NSFW puns subreddit for that.

Edit* I'm not replying any longer and turning off notifications but to all those that say "no one cares", there sure are a lot of you arguing about it. Maybe I'm wrong but you people don't need to be rude about it. If you really don't care, don't comment.