Introduce default creation method/setting, instead of always requiring lambda at getOrPut

[carstenhag]

Is your feature request related to a problem? Please describe.
I want to create a bitmap cache (ie val bitmapCache = InMemoryKache<Int, Bitmap>).
If I run bitmapCache.get(1) I want to get the data. If it doesn't exist, it should automatically run a suspending function first, then return the value.

getOrPut theoretically does this, but I would have to tediously copy over the creationFunction function to all places where I want to get values.

Describe the solution you'd like
The Configuration could accept a factory lambda.

Describe alternatives you've considered
Define a lambda like this once, and reference it in all getOrPut calls:

    val bitmapConstruction = { resId: Int ->
        bitmapHelper.getBitmap(resId, context)
    }
    bitmapCache.getOrPut(R.drawable.xyz, bitmapConstruction)

Additional context
LruCache has a way to override the create method to do just this. But it's written in Java and doesn't support coroutines etc.

[carstenhag]

As I didn't need to make the cache public anyway, I implemented it like this:

    private val bitmapConstructionLambda = { resId: Int ->
        bitmapHelper.getBitmap(resId, context)
    }
    private val cacheSize = 4 * 1024 * 1024L // 4 MB
    private val bitmapCache = InMemoryKache<Int, Bitmap>(maxSize = cacheSize) {
        sizeCalculator = { _, y -> y.byteCount / 1024L }
    }

    override suspend fun getCachedBitmap(@DrawableRes resId: Int): Bitmap {
        val bitmap = bitmapCache.getOrPut(resId, bitmapConstructionLambda)
        require(bitmap != null) { "Bitmap for $resId could not be get or created" }
        return bitmap
    }

[MSDarwish2000]

Thank you for your valuable feedback and suggestion. I think this feature is a good-to-have one and I'd think of ways to implement it in a future version.

I apologize for the late response for personal reasons.