Feature Request - default CoroutineContext

[pkozakCC]

There are cases where the default CoroutineContext has to be modified for all suspendable RestEasy Resource method calls, for example in order to add a custom CoroutineContext.Element for every request, that would hold application-specific details, such as tenant ID (which is precisely my case btw).

This can be done manually, but it's tedious and error-prone.

It would be nice to introduce a mechanism that would make it possible to modify the default CoroutineContext.
It can be either of a form CoroutineWebFilter, that would return a suspendable function and would respect the context in the downstream, e.g.:

    suspend fun filter(
        serverWebExchange: ServerWebExchange,
        webFilterChain: CoroutineWebFilterChain,
    ): Mono<Void> {
        return withContext(MyCustomCoroutineContextElement()) {
            webFilterChain.filter(serverWebExchange)
        }
    }

    interface CoroutineWebFilterChain {
        suspend fun filter(serverWebExchange: ServerWebExchange): Mono<Void>
    }

Or similarly to the Spring approach (links below) - registering a list of CoroutineContext.Element in a filter (per request)

After:

• https://stackoverflow.com/questions/77370339/quarkus-default-coroutines-context?noredirect=1#comment136401015_77370339

Spring Webflux approach for the issue (which will be released in 6.1) - current implementation of CoWebFilter does not respect the CoroutineContext changes:

• Propagate CoroutineContext in CoWebFilter spring-projects/spring-framework#27522
• spring-projects/spring-framework@b0aa004