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CoroutineContextServerInterceptor method to apply a ForwardingServerCall #374

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CoroutineContextServerInterceptor method to apply a ForwardingServerCall #374

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9 changes: 8 additions & 1 deletion stub/src/main/java/io/grpc/kotlin/CoroutineContextServerInterceptor.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,13 @@ abstract class CoroutineContextServerInterceptor : ServerInterceptor {
*/
abstract fun coroutineContext(call: ServerCall<*, *>, headers: Metadata): CoroutineContext

/**
* Override this function to insert a forwarding server call.
*/
open fun <ReqT, RespT> forward(call: ServerCall<ReqT, RespT>) :ServerCall<ReqT, RespT> {
return call
}

private inline fun <R> withGrpcContext(context: GrpcContext, action: () -> R): R {
val oldContext: GrpcContext = context.attach()
return try {
Expand All @@ -61,7 +68,7 @@ abstract class CoroutineContextServerInterceptor : ServerInterceptor {
throw e
}
return withGrpcContext(GrpcContext.current().extendCoroutineContext(coroutineContext)) {
next.startCall(call, headers)
next.startCall(forward(call), headers)
}
}
}