I want to modify ReactorContext or the context of reactor af

Question

I want to modify ReactorContext or the context of reactor after a coroutine is created For example some `CoroutineContext` has a `ReactorContext` which wraps a `context of reactor` In my case the context of reactor has two key value pairs as the following image but I want to add one more pair to the current context mutably not immutable

kazuki tanida · Answer

Anyway I want to modify ReactorContext or the context of reactor directly associated with a coroutine Is it possible

Nick Zois · Answer

Adding information to the context make it available to `self` and spawned coroutines So context modifications in the children may not be available to the parent

Nick Zois · Answer

I put here an issue if you face the same let me know I am also trying to solve it in SpringbootWorld Well you can add extra info to the ReactorContext but I faced issues when I call other suspend able methods in springboot < service> which somehow eliminates the context that I ve added I haven t investigated more on that but if you are in springboot you may face similar issues e g Lets say that I have a rest controller and I add the user id and span id in the reactor s context if I call a method to a service component the context keys have erased

kazuki tanida · Answer

gt Adding information to the context make it available to `self` and spawned coroutines So context modifications in the children may not be available to the parent I see That make sense cry gt I put here an issue if you face the same let me know I am also trying to solve it in SpringbootWorld Well you can add extra info to the ReactorContext but I faced issues when I call other suspend able methods in springboot ` service` which somehow eliminates the context that I ve added I haven t investigated more on that but if you are in springboot you may face similar issues e g Lets say that I have a rest controller and I add the user id and span id in the reactor s context if I call a method to a service component the context keys have erased I also use Kotlin with Spring Boot WebFlux and in `WebFilter` and I found I can add extra info to the context of Reactor which belongs to ReactorContext but I want to modify it after WebFilter like this ``` Component class HttpRequestWebFilter WebFilter override fun filter exchange ServerWebExchange chain WebFilterChain Mono lt Void gt return chain filter exchange contextWrite ctx gt ctx put SomeClass class java someValue ``` I found it works in suspending function in some bean class ```coroutineContext ReactorContext context get SomeClass class java will result in someValue```