I’m working on this software project where I have multiple modules, and I’m facing a bit of a challenge. So, picture this: I have a module that handles the creation of resources on AWS, and I need to get the ARN (Amazon Resource Name) from that module into another module where I’m working on some access management features.
The tricky part is that I’m not sure how to do this cleanly. I know I could potentially expose the ARN by returning it directly from the resource creation function, but that feels a bit clunky. Plus, I’m worried about tight coupling between my modules, which I’m trying to avoid for better maintainability in the long run.
I’ve thought about a few approaches. One option is to use an event-driven model where the module that creates the resources emits an event with the ARN once it’s created, and the other module listens for that event and reacts accordingly. But then I wonder if that’s a bit overkill if everything is running in a fairly linear flow.
Another idea I had was to implement some sort of shared state or global context that both modules can access, but I’m not really a fan of that either since it can lead to issues with state management and make things harder to debug.
So here I am, stuck in the middle. Has anyone else run into this kind of issue? How did you manage to pull the ARN from one module to another without making things a tangled mess? Any best practices or design patterns you’d recommend? It would be awesome to hear how you’ve tackled similar problems, as I’m sure there are some clever solutions out there that I might not have considered. Thanks!
How to Share ARN Between Modules
It sounds like you’re in a bit of a tricky situation with your modules. I totally get the concern about tight coupling—it’s like a really fragile web, right? Here are a few thoughts I have based on what you’ve described:
Event-Driven Model
Your idea about using an event-driven model could actually work really well, even if the flow seems linear. It lets each module be pretty independent, which is nice for future changes. You could use a message broker or even just some simple pub/sub mechanism. When the resource is created, the creation module can publish the ARN, and the access management module can just listen for that event. If the project grows, this could make it really easy to scale.
Callback Functions
Another option could be to use callback functions. When you create the resource, you can pass in a function that gets called with the ARN once it’s created. This keeps things less coupled because the accessing module just provides a function to handle the ARN after the resource is created.
Configuration/Registry Approach
Your thought about shared state isn’t so great for debugging, but what about a simple registry? Like, you could create a small service that holds the ARNs in a dictionary or something. Each module could read from this registry when they need the ARN. It’s not a direct coupling like calling methods, but you still have a shared point of access.
Wrapping Up
Ultimately, I think it comes down to how you want to structure your modules and how complex your interactions are. If you’re keeping it simple and low overhead, maybe the event-driven approach is a solid way to go. If you want to recombine the modules later in ways you haven’t thought of yet, the callback or registry pattern might give you some flexibility.
Good luck! I hope you find a solution that fits well with your project!
In your situation, it’s essential to prioritize modularity while ensuring that your modules can communicate effectively. One approach that strikes a balance between clean architecture and functionality is the use of a messaging or event bus system. By allowing the resource creation module to publish an event containing the ARN when a resource is created, and having the access management module subscribe to listen for that event, you achieve loose coupling. This design not only facilitates better separation of concerns but also enhances scalability. If the application grows or requires additional modules in the future, the event-driven model can easily accommodate those changes without requiring significant refactoring.
Another viable pattern to explore is Dependency Injection (DI). By using DI, you can create interfaces or contracts that allow the access management module to request the ARN from the resource management module dynamically without tightly coupling the two. This can be achieved by implementing a service that can be instantiated with appropriate dependencies. When the resource is created, the ARN can be stored in a way that is accessible to the DI mechanism, typically through a factory or a service locator. Using this pattern keeps your modules independent and focused on their specific responsibilities while still providing the necessary data when required.