1 files changed, 108 insertions, 0 deletions
diff --git a/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/logging/RequestDiagnosticContext.java b/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/logging/RequestDiagnosticContext.java
new file mode 100644
index 00000000..0c4a4b1f
--- /dev/null
+++ b/rest-services/http-client/src/main/java/org/onap/dcaegen2/services/sdk/rest/services/adapters/http/logging/RequestDiagnosticContext.java
@@ -0,0 +1,108 @@
+/*
+ * ============LICENSE_START====================================
+ * DCAEGEN2-SERVICES-SDK
+ * =========================================================
+ * Copyright (C) 2019 Nokia. All rights reserved.
+ * =========================================================
+ * 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.
+ * ============LICENSE_END=====================================
+ */
+
+package org.onap.dcaegen2.services.sdk.rest.services.model.logging;
+
+import io.vavr.collection.HashMap;
+import io.vavr.collection.Map;
+import java.util.UUID;
+import org.immutables.value.Value;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.slf4j.MDC;
+
+/**
+ * @author <a href="mailto:piotr.jaszczyk@nokia.com">Piotr Jaszczyk</a>
+ * @since 1.1.2
+ */
+@Value.Immutable
+public interface RequestDiagnosticContext {
+
+    UUID requestId();
+
+    @Nullable UUID invocationId();
+
+    @Value.Default
+    default GlobalDiagnosticContext global() {
+        return GlobalDiagnosticContext.instance();
+    }
+
+    @Value.Derived
+    default Map<String, String> remoteCallHttpHeaders() {
+        java.util.Map<String, String> result = new java.util.HashMap<>();
+
+        result.put(MdcVariables.httpHeader(MdcVariables.REQUEST_ID), requestId().toString());
+
+        if (invocationId() != null) {
+            result.put(MdcVariables.httpHeader(MdcVariables.INVOCATION_ID), invocationId().toString());
+        }
+
+        return HashMap.ofAll(result);
+    }
+
+    @Value.Derived
+    default Map<String, String> asMap() {
+        java.util.Map<String, String> result = new java.util.HashMap<>();
+
+        if (requestId() != null) {
+            result.put(MdcVariables.REQUEST_ID, requestId().toString());
+        }
+
+        if (invocationId() != null) {
+            result.put(MdcVariables.INVOCATION_ID, invocationId().toString());
+        }
+
+        return global().asMap().merge(HashMap.ofAll(result));
+    }
+
+    default void withSlf4jMdc(Runnable runnable) {
+        withSlf4jMdc(true, runnable);
+    }
+
+    default void withSlf4jMdc(boolean loglevelEnabled, Runnable runnable) {
+        if (loglevelEnabled) {
+            final java.util.Map<String, String> ctxBefore = MDC.getCopyOfContextMap();
+            try {
+                MDC.setContextMap(asMap().toJavaMap());
+                runnable.run();
+            } finally {
+                if (ctxBefore == null) {
+                    MDC.clear();
+                } else {
+                    MDC.setContextMap(ctxBefore);
+                }
+            }
+        }
+    }
+
+    default @NotNull RequestDiagnosticContext withNewInvocationId() {
+        return ImmutableRequestDiagnosticContext.copyOf(this)
+                .withInvocationId(UUID.randomUUID());
+    }
+
+    static ImmutableRequestDiagnosticContext create() {
+        return ImmutableRequestDiagnosticContext.builder()
+                .requestId(UUID.randomUUID())
+                .invocationId(UUID.randomUUID())
+                .build();
+    }
+}
+
+