Coroutines: Relationship between Scope and Context

Observation

• In the diagram, there are 3 levels.
• Top highest level is the parent level, which has 4 children. now all 3 have the same context as the parent since they inherit the context.
• One child will have a different context since it has overridden the context to a different one.
• In the output InnermostCoroutine2 the name is modified, but the rest all will have the same context inherited

Code

     fun scopeAndContextRelationshipDemo() {

        viewModelScope.launch(CoroutineName("Pikachuu")) {

            val name = coroutineContext[CoroutineName]?.name
            println("OuterMostCoroutine:-> $name")

            launch {

                val name = coroutineContext[CoroutineName]?.name
                println("InnerCoroutine1:-> $name")

                launch {

                    val name = coroutineContext[CoroutineName]?.name
                    println("InnermostCoroutine1:-> $name")

                }.join()

            }.join()

            launch {

                val name = coroutineContext[CoroutineName]?.name
                println("InnerCoroutine2:-> $name")

                launch(CoroutineName("Goku ")) {

                    val name = coroutineContext[CoroutineName]?.name
                    println("InnermostCoroutine2:-> $name")

                }.join()

            }.join()

        }

    }

Output

OuterMostCoroutine:-> Pikachuu
InnerCoroutine1:-> Pikachuu
InnermostCoroutine1:-> Pikachuu
InnerCoroutine2:-> Pikachuu
InnermostCoroutine2:-> Goku