2 * Copyright © 2018-2019 AT&T Intellectual Property.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.onap.ccsdk.cds.blueprintsprocessor.core
19 import kotlinx.coroutines.*
20 import kotlinx.coroutines.reactor.ReactorContext
21 import kotlinx.coroutines.reactor.asCoroutineContext
22 import org.onap.ccsdk.cds.blueprintsprocessor.core.service.MonoMDCCoroutine
23 import org.onap.ccsdk.cds.controllerblueprints.core.MDCContext
24 import reactor.core.publisher.Mono
25 import kotlin.coroutines.CoroutineContext
26 import kotlin.coroutines.EmptyCoroutineContext
28 /** Used in Rest controller API methods to populate MDC context to nested coroutines from reactor web filter context. */
29 @UseExperimental(InternalCoroutinesApi::class)
30 fun <T> monoMdc(context: CoroutineContext = EmptyCoroutineContext,
31 block: suspend CoroutineScope.() -> T?): Mono<T> = Mono.create { sink ->
33 val reactorContext = (context[ReactorContext]?.context?.putAll(sink.currentContext())
34 ?: sink.currentContext()).asCoroutineContext()
35 /** Populate MDC context only if present in Reactor Context */
36 val newContext = if (!reactorContext.context.isEmpty
37 && reactorContext.context.hasKey(MDCContext)) {
38 val mdcContext = reactorContext.context.get<MDCContext>(MDCContext)
39 GlobalScope.newCoroutineContext(context + reactorContext + mdcContext)
40 } else GlobalScope.newCoroutineContext(context + reactorContext)
42 val coroutine = MonoMDCCoroutine(newContext, sink)
43 sink.onDispose(coroutine)
44 coroutine.start(CoroutineStart.DEFAULT, coroutine, block)