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How much are SOLID principles in OOP programming (and JVM languages specifically) just a mindless following of a set of ideas that aren't always the best solution? (programming.dev)

submitted 1 day ago by iByteABit@programming.dev to c/programming@programming.dev

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As a Java engineer in the web development industry for several years now, having heard multiple times that X is good because of SOLID principles or Y is bad because it breaks SOLID principles, and having to memorize the "good" ways to do everything before an interview etc, I find it harder and harder to do when I really start to dive into the real reason I'm doing something in a particular way.

One example is creating an interface for every goddamn class I make because of "loose coupling" when in reality none of these classes are ever going to have an alternative implementation.

Also the more I get into languages like Rust, the more these doubts are increasing and leading me to believe that most of it is just dogma that has gone far beyond its initial motivations and goals and is now just a mindless OOP circlejerk.

There are definitely occasions when these principles do make sense, especially in an OOP environment, and they can also make some design patterns really satisfying and easy.

What are your opinions on this?

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[–] FunkFactory@lemmy.world 2 points 8 hours ago (1 children)

As a dev working on a large project using gradle, a lot of the time interfaces are useful as a means to avoid circular dependencies while breaking things up into modules. It can also really boost build times if modules don't have to depend on concrete impls, which can kill the parallelization of the build. But I don't create interfaces for literally everything, only if a type is likely going to be used across module boundaries. Which is a roundabout way of saying they reduce coupling, but just noting it as a practical example of the utility you gain.