How Can I Ensure Method Invocation After Object Creation in Go?

Ensuring Method Invocation After Object Creation in Go

In Go, creating a struct and assigning a method to it doesn't guarantee that the method will be invoked after object creation. To address this issue, let's explore the available options.

The Close() method that should be invoked upon object creation cannot be forced to execute. The best practice is to emphasize in the documentation that the method must be called once the object is no longer required.

In extreme cases where a program terminates abruptly, there's no guarantee that any code will run. The runtime.SetFinalizer() function can be utilized to register a function that will execute when the garbage collector identifies a value as unreachable. However, there's no assurance that the registered function will be invoked before the program exits.

One possible approach is to make the type unexported and expose a constructor function like NewMyType(), within which the struct can be initialized appropriately. This doesn't enforce the call to the Close() method but prevents the need to handle improper initialization.

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