Hello,
I'm trying to understand if I'm going overboard with defining interfaces
where they are used (i.e am I re-defining them nu-necessarily). Here's an
example. The interface is passed down from A->B->C where C (and only C)
calls the DoThing() method of the interface:
----------------------------------------------
package A
import B
type DoThinger interface {
DoThing()
}
func Run(dt DoThinger) {
B.CallB(dt)
}
---------------------------------------------
package B
import C
type DoThinger interface {
DoThing()
}
func Call(dt DoThinger) {
C.Call(dt)
}
---------------------------------------------
package C
type DoThinger interface {
DoThing()
}
func Call(dt DoThinger) {
dt.DoThing()
}
---------------------------------------------
Do I need to be re-defining this interface everywhere? I guess
an alternative would be to just re-use the `C.DoThinger`, but I feel like
this doesn't seem right as now A is directly importing C, which seems to
'break' the abstraction provided by B:
----------------------------------------------
package A
import (
"B",
"C"
)
func Run(dt C.DoThinger) {
B.Call(dt)
}
```
We could obviously define the interface elsewhere in one place, and have A,
B and C share use of it. This doesn't seem like the end of the world, as
any of the consumers of that interface can define a new local interface if
the shared one becomes unsuitable for them.
My current implementation (the example given), is to reduce coupling
between packages. Should I be thinking about this differently? Should I be
concerned that I'm not adhering to DRY?
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