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kotlinlang

Hey folks :wave:
Quick question on the new `createApplicationPlugin` API. More info in :thread:.

We currently have an interceptor in our ktor server that merges custom context data (if any) into the CoroutineContext on `ApplicationCallPipeline.Setup`.

```pipeline.intercept(customContextPhase) {
    val context = genContext(call)

    if (context != null) {
        withContext(context) {
            proceed()
        }
    } else {
        proceed()
    }
}```

Since `withContext()` and `proceed()` are both not directly available to us in `createApplicationPlugin` 's scope, do you have any recommendations on a way to achieve this same functionality? Or should we just stick with a pipeline interceptor in this case?

We did successfully create a custom `Hook` that basically does what this interceptor does. But this didn't feel quite right, as the hook ends up doing the plugin's heavy lifting.

I think it’s OK to write a hook when you need low-level control over the execution.