[Question] How to intercept suspend methods in Kotlin and provide a custom coroutine context?

[slawa4s]

Hi! I need to intercept suspend methods and execute them within a custom coroutine context. I want to ensure that the method runs asynchronously with the custom context, while maintaining context propagation for OpenTelemetry (such as parent-child spans and tracing metadata).

I want something like this:

suspend fun intercept(originalMethod: Callable<*>, method: Method, args: Array<Any?>): Any? {
    val customContext = Dispatchers.IO  // Example of custom context
    return withContext(customContext) {
        // Call the original suspend method
        originalMethod.call()
    }
}

[raphw]

I do not know how those get compiled, so the first thing you'd need to check would be to look into javap of a Kotlin class. From there, you can intercept the byte code as it is shown by javap.