Expose tracing context via log context service

Tracing context must be available to application code
when the application makes outbound calls.

Change-Id: Ica8e1f9d8e0bd6d37688a01a64c1fbedc126801c
Issue-ID: SDC-1264
Signed-off-by: vempo <vitaliy.emporopulo@amdocs.com>

5 files changed, 113 insertions, 11 deletions

diff --git a/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/slf4j/MDCDelegate.java b/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/slf4j/MDCDelegate.java
index 8d719a2da8..026d3fa99b 100644
--- a/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/slf4j/MDCDelegate.java
+++ b/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/slf4j/MDCDelegate.java
@@ -50,6 +50,27 @@ class MDCDelegate {
     }
 
     /**
+     * Reads all context fields from MDC.
+     */
+    static Map<ContextField, String> get() {
+        return get(ContextField.values());
+    }
+
+    /**
+     * Reads selected fields from MDC.
+     */
+    static Map<ContextField, String> get(ContextField... fields) {
+
+        Map<ContextField, String> values = new EnumMap<>(ContextField.class);
+
+        for (ContextField key : fields) {
+            values.put(key, MDC.get(key.asKey()));
+        }
+
+        return values;
+    }
+
+    /**
      * Entirely replaces the logging MDC context with the content of the argument. Logging keys that are not present in
      * the input map will be cleared from MDC.
      */
diff --git a/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/slf4j/RequestContextProvider.java b/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/slf4j/RequestContextProvider.java
index d79771c1c5..40684cc132 100644
--- a/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/slf4j/RequestContextProvider.java
+++ b/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/slf4j/RequestContextProvider.java
@@ -30,10 +30,21 @@ class RequestContextProvider implements ContextProvider {
 
     private final ContextData data;
 
-    RequestContextProvider(ContextData contextData) {
+    private RequestContextProvider(ContextData contextData) {
         this.data = contextData;
     }
 
+    static RequestContextProvider from(ContextData contextData) {
+        return new RequestContextProvider(contextData);
+    }
+
+    static ContextData to(Map<ContextField, String> values) {
+        return ContextData.builder()
+                          .requestId(values.get(ContextField.REQUEST_ID))
+                          .serviceName(values.get(ContextField.SERVICE_NAME))
+                          .partnerName(values.get(ContextField.PARTNER_NAME)).build();
+    }
+
     @Override
     public Map<ContextField, String> values() {
 
diff --git a/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/slf4j/SLF4JLoggingServiceProvider.java b/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/slf4j/SLF4JLoggingServiceProvider.java
index 1a5d6facc2..9d4d507ac5 100644
--- a/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/slf4j/SLF4JLoggingServiceProvider.java
+++ b/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/main/java/org/openecomp/sdc/logging/slf4j/SLF4JLoggingServiceProvider.java
@@ -45,7 +45,12 @@ public class SLF4JLoggingServiceProvider implements LoggingServiceProvider {
     @Override
     public void put(ContextData contextData) {
         Objects.requireNonNull(contextData, "Context data cannot be null");
-        MDCDelegate.put(new RequestContextProvider(contextData), new GlobalContextProvider());
+        MDCDelegate.put(RequestContextProvider.from(contextData), new GlobalContextProvider());
+    }
+
+    @Override
+    public ContextData get() {
+        return RequestContextProvider.to(MDCDelegate.get());
     }
 
     @Override
diff --git a/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/test/java/org/openecomp/sdc/logging/slf4j/LoggingContextTest.java b/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/test/java/org/openecomp/sdc/logging/slf4j/LoggingContextTest.java
index 47386d4cf3..c2cef88899 100644
--- a/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/test/java/org/openecomp/sdc/logging/slf4j/LoggingContextTest.java
+++ b/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/test/java/org/openecomp/sdc/logging/slf4j/LoggingContextTest.java
@@ -42,7 +42,7 @@ public class LoggingContextTest {
 
     @Test
     public void returnMdcWrapperWhenToRunnableCalled() {
-        assertEquals(LoggingContext.copyToRunnable(() -> {}).getClass(), MDCRunnableWrapper.class);
+        assertEquals(LoggingContext.copyToRunnable(() -> { }).getClass(), MDCRunnableWrapper.class);
     }
 
     @Test(expectedExceptions = NullPointerException.class)
@@ -140,4 +140,32 @@ public class LoggingContextTest {
         LoggingContext.put(context);
         assertNotNull(MDC.get(ContextField.INSTANCE_ID.asKey()));
     }
+
+    @Test
+    public void contextReturnsServiceNameWhenPut() {
+
+        String random = UUID.randomUUID().toString();
+        ContextData context = ContextData.builder().serviceName(random).build();
+        LoggingContext.put(context);
+        assertEquals(context, LoggingContext.get());
+    }
+
+    @Test
+    public void contextReturnsRequestIdWhenPut() {
+
+        String random = UUID.randomUUID().toString();
+        ContextData context = ContextData.builder().requestId(random).build();
+        LoggingContext.put(context);
+        assertEquals(context, LoggingContext.get());
+    }
+
+    @Test
+    public void contextReturnsPartnerNameWhenPut() {
+
+        String random = UUID.randomUUID().toString();
+        ContextData context = ContextData.builder().partnerName(random).build();
+        LoggingContext.put(context);
+        assertEquals(context, LoggingContext.get());
+    }
+
 }
diff --git a/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/test/java/org/openecomp/sdc/logging/slf4j/RequestContextProviderTest.java b/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/test/java/org/openecomp/sdc/logging/slf4j/RequestContextProviderTest.java
index fa7926acef..a2d36ef085 100644
--- a/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/test/java/org/openecomp/sdc/logging/slf4j/RequestContextProviderTest.java
+++ b/openecomp-be/lib/openecomp-sdc-logging-lib/openecomp-sdc-logging-core/src/test/java/org/openecomp/sdc/logging/slf4j/RequestContextProviderTest.java
@@ -17,8 +17,10 @@
 package org.openecomp.sdc.logging.slf4j;
 
 import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertNull;
 import static org.testng.Assert.assertTrue;
 
+import java.util.HashMap;
 import org.openecomp.sdc.logging.api.ContextData;
 import org.testng.annotations.Test;
 
@@ -31,32 +33,67 @@ import org.testng.annotations.Test;
 public class RequestContextProviderTest {
 
     @Test
-    public void valuesEmptyWhenInputEmpty() {
-        RequestContextProvider provider = new RequestContextProvider(ContextData.builder().build());
+    public void valuesEmptyWhenInputDataEmpty() {
+        RequestContextProvider provider = RequestContextProvider.from(ContextData.builder().build());
         assertTrue(provider.values().isEmpty());
     }
 
     @Test
-    public void serviceNameReturnedWhenSupplied() {
+    public void serviceNameReturnedWhenSuppliedInData() {
         final String service = "supplied-service-name";
         RequestContextProvider provider =
-                new RequestContextProvider(ContextData.builder().serviceName(service).build());
+                RequestContextProvider.from(ContextData.builder().serviceName(service).build());
         assertEquals(provider.values().get(ContextField.SERVICE_NAME), service);
     }
 
     @Test
-    public void partnerNameReturnedWhenSupplied() {
+    public void partnerNameReturnedWhenSuppliedInData() {
         final String partner = "supplied-partner-name";
         RequestContextProvider provider =
-                new RequestContextProvider(ContextData.builder().partnerName(partner).build());
+                RequestContextProvider.from(ContextData.builder().partnerName(partner).build());
         assertEquals(provider.values().get(ContextField.PARTNER_NAME), partner);
     }
 
     @Test
-    public void requestIdReturnedWhenSupplied() {
+    public void requestIdReturnedWhenSuppliedInData() {
         final String request = "supplied-request-id";
         RequestContextProvider provider =
-                new RequestContextProvider(ContextData.builder().requestId(request).build());
+                RequestContextProvider.from(ContextData.builder().requestId(request).build());
         assertEquals(provider.values().get(ContextField.REQUEST_ID), request);
     }
+
+    @Test
+    public void dataEmptyWhenValuesEmpty() {
+        ContextData data = RequestContextProvider.to(new HashMap<>());
+        assertNull(data.getPartnerName());
+        assertNull(data.getRequestId());
+        assertNull(data.getServiceName());
+    }
+
+    @Test
+    public void serviceNameInDataWhenSuppliedInValues() {
+        final String service = "values-service-name";
+        HashMap<ContextField, String> values = new HashMap<>();
+        values.put(ContextField.SERVICE_NAME, service);
+        ContextData data = RequestContextProvider.to(values);
+        assertEquals(data.getServiceName(), service);
+    }
+
+    @Test
+    public void partnerNameInDataWhenSuppliedInValues() {
+        final String partner = "values-partner-name";
+        HashMap<ContextField, String> values = new HashMap<>();
+        values.put(ContextField.PARTNER_NAME, partner);
+        ContextData data = RequestContextProvider.to(values);
+        assertEquals(data.getPartnerName(), partner);
+    }
+
+    @Test
+    public void requestIdInDataWhenSuppliedInValues() {
+        final String request = "values-request-id";
+        HashMap<ContextField, String> values = new HashMap<>();
+        values.put(ContextField.REQUEST_ID, request);
+        ContextData data = RequestContextProvider.to(values);
+        assertEquals(data.getRequestId(), request);
+    }
 }