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-rw-r--r--ms/controllerblueprints/modules/blueprint-core/src/main/kotlin/org/onap/ccsdk/cds/controllerblueprints/core/MDCContext.kt50
-rw-r--r--ms/controllerblueprints/modules/blueprint-core/src/test/kotlin/org/onap/ccsdk/cds/controllerblueprints/core/MDCContextTest.kt56
2 files changed, 106 insertions, 0 deletions
diff --git a/ms/controllerblueprints/modules/blueprint-core/src/main/kotlin/org/onap/ccsdk/cds/controllerblueprints/core/MDCContext.kt b/ms/controllerblueprints/modules/blueprint-core/src/main/kotlin/org/onap/ccsdk/cds/controllerblueprints/core/MDCContext.kt
new file mode 100644
index 000000000..001ec751e
--- /dev/null
+++ b/ms/controllerblueprints/modules/blueprint-core/src/main/kotlin/org/onap/ccsdk/cds/controllerblueprints/core/MDCContext.kt
@@ -0,0 +1,50 @@
+/*
+ * Copyright © 2018-2019 AT&T Intellectual Property.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.ccsdk.cds.controllerblueprints.core
+
+import kotlinx.coroutines.ThreadContextElement
+import org.slf4j.MDC
+import kotlin.coroutines.AbstractCoroutineContextElement
+import kotlin.coroutines.CoroutineContext
+
+typealias MDCContextMap = Map<String, String>?
+
+class MDCContext(private val contextMap: MDCContextMap = MDC.getCopyOfContextMap()) :
+ ThreadContextElement<MDCContextMap>, AbstractCoroutineContextElement(Key) {
+ /**
+ * Key of [MDCContext] in [CoroutineContext].
+ */
+ companion object Key : CoroutineContext.Key<MDCContext>
+
+ override fun updateThreadContext(context: CoroutineContext): MDCContextMap {
+ val oldState = MDC.getCopyOfContextMap()
+ setCurrent(contextMap)
+ return oldState
+ }
+
+ override fun restoreThreadContext(context: CoroutineContext, oldState: MDCContextMap) {
+ setCurrent(oldState)
+ }
+
+ private fun setCurrent(contextMap: MDCContextMap) {
+ if (contextMap == null) {
+ MDC.clear()
+ } else {
+ MDC.setContextMap(contextMap)
+ }
+ }
+} \ No newline at end of file
diff --git a/ms/controllerblueprints/modules/blueprint-core/src/test/kotlin/org/onap/ccsdk/cds/controllerblueprints/core/MDCContextTest.kt b/ms/controllerblueprints/modules/blueprint-core/src/test/kotlin/org/onap/ccsdk/cds/controllerblueprints/core/MDCContextTest.kt
new file mode 100644
index 000000000..2ddb4503d
--- /dev/null
+++ b/ms/controllerblueprints/modules/blueprint-core/src/test/kotlin/org/onap/ccsdk/cds/controllerblueprints/core/MDCContextTest.kt
@@ -0,0 +1,56 @@
+/*
+ * Copyright © 2018-2019 AT&T Intellectual Property.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onap.ccsdk.cds.controllerblueprints.core
+
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.runBlocking
+import org.junit.After
+import org.junit.Before
+import org.slf4j.MDC
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class MDCContextTest {
+ val log = logger(MDCContextTest::class)
+ @Before
+ fun setup() {
+ MDC.clear()
+ }
+
+ @After
+ fun tearDow() {
+ MDC.clear()
+ }
+
+ @Test
+ fun testContextCanBePassedBetweenCoroutines() {
+ MDC.put(BluePrintConstants.RESPONSE_HEADER_TRANSACTION_ID, "12345")
+ runBlocking {
+ GlobalScope.launch {
+ assertEquals(null, MDC.get(BluePrintConstants.RESPONSE_HEADER_TRANSACTION_ID))
+ }
+ launch(MDCContext()) {
+ assertEquals("12345", MDC.get(BluePrintConstants.RESPONSE_HEADER_TRANSACTION_ID),
+ "couldn't get request id")
+
+ MDC.put("client_id", "client-1")
+ assertEquals("client-1", MDC.get("client_id"), "couldn't get client id")
+ }
+ }
+ }
+} \ No newline at end of file