Add JAX-RS and Spring filters for setting up MDC

Issue-ID: LOG-1113
Change-Id: I7167943384e3983c7eced1c969ed51fcd8130c88
Signed-off-by: Brittany Plummer (bp896r) <bp896r@att.com>

6 files changed, 598 insertions, 0 deletions

diff --git a/reference/logging-filter/logging-filter-spring/pom.xml b/reference/logging-filter/logging-filter-spring/pom.xml
new file mode 100644
index 0000000..42f5fe8
--- /dev/null
+++ b/reference/logging-filter/logging-filter-spring/pom.xml
@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<parent>
+		<groupId>org.onap.logging-analytics</groupId>
+		<artifactId>logging-filter-parent</artifactId>
+		<version>1.5.0-SNAPSHOT</version>
+	</parent>
+
+	<artifactId>logging-filter-spring</artifactId>
+
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-dependencies</artifactId>
+				<version>2.0.5.RELEASE</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-webmvc</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.onap.logging-analytics</groupId>
+			<artifactId>logging-filter-base</artifactId>
+			<version>${project.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>org.onap.logging-analytics</groupId>
+			<artifactId>logging-slf4j</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>javax.servlet</groupId>
+			<artifactId>javax.servlet-api</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>javax.ws.rs</groupId>
+			<artifactId>javax.ws.rs-api</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>slf4j-api</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.logging.log4j</groupId>
+			<artifactId>log4j-slf4j-impl</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.glassfish.jersey.core</groupId>
+			<artifactId>jersey-client</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+      		<groupId>org.mockito</groupId>
+      		<artifactId>mockito-core</artifactId>
+      		<scope>test</scope>
+    	</dependency>
+	</dependencies>
+</project>
diff --git a/reference/logging-filter/logging-filter-spring/src/main/java/org/onap/logging/filter/spring/LoggingInterceptor.java b/reference/logging-filter/logging-filter-spring/src/main/java/org/onap/logging/filter/spring/LoggingInterceptor.java
new file mode 100644
index 0000000..d8d6bf4
--- /dev/null
+++ b/reference/logging-filter/logging-filter-spring/src/main/java/org/onap/logging/filter/spring/LoggingInterceptor.java
@@ -0,0 +1,96 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - Logging
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. 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.logging.filter.spring;
+
+import java.util.Collections;
+import java.util.Map;
+import java.util.stream.Collectors;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.ws.rs.core.Context;
+import javax.ws.rs.ext.Providers;
+import org.onap.logging.filter.base.MDCSetup;
+import org.onap.logging.filter.base.SimpleMap;
+import org.onap.logging.filter.base.SimpleServletHeadersMap;
+import org.onap.logging.ref.slf4j.ONAPLogConstants;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.MDC;
+import org.springframework.stereotype.Component;
+import org.springframework.web.servlet.ModelAndView;
+import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
+
+@Component
+public class LoggingInterceptor extends HandlerInterceptorAdapter {
+
+    private static final Logger logger = LoggerFactory.getLogger(LoggingInterceptor.class);
+
+    private MDCSetup mdcSetup = new MDCSetup();
+
+    @Context
+    private Providers providers;
+
+    @Override
+    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
+            throws Exception {
+        SimpleMap headers = new SimpleServletHeadersMap(request);
+        String requestId = mdcSetup.getRequestId(headers);
+        MDC.put(ONAPLogConstants.MDCs.REQUEST_ID, requestId);
+        mdcSetup.setInvocationId(headers);
+        mdcSetup.setServiceName(request);
+        mdcSetup.setMDCPartnerName(headers);
+        mdcSetup.setClientIPAddress(request);
+        mdcSetup.setEntryTimeStamp();
+        mdcSetup.setInstanceID();
+        mdcSetup.setServerFQDN();
+        MDC.put(ONAPLogConstants.MDCs.RESPONSE_STATUS_CODE, ONAPLogConstants.ResponseStatus.INPROGRESS.toString());
+        mdcSetup.setLogTimestamp();
+        mdcSetup.setElapsedTime();
+        logger.info(ONAPLogConstants.Markers.ENTRY, "Entering");
+        if (logger.isDebugEnabled())
+            logRequestInformation(request);
+        return true;
+    }
+
+    protected void logRequestInformation(HttpServletRequest request) {
+        Map<String, String> headers = Collections.list((request).getHeaderNames()).stream()
+                .collect(Collectors.toMap(h -> h, request::getHeader));
+
+        logger.debug("===========================request begin================================================");
+        logger.debug("URI         : {}", request.getRequestURI());
+        logger.debug("Method      : {}", request.getMethod());
+        logger.debug("Headers     : {}", headers);
+        logger.debug("==========================request end================================================");
+
+    }
+
+    @Override
+    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
+            ModelAndView modelAndView) throws Exception {
+        mdcSetup.setResponseStatusCode(response.getStatus());
+        mdcSetup.setLogTimestamp();
+        mdcSetup.setElapsedTime();
+        mdcSetup.setResponseDescription(response.getStatus());
+        MDC.put(ONAPLogConstants.MDCs.RESPONSE_CODE, String.valueOf(response.getStatus()));
+        logger.info(ONAPLogConstants.Markers.EXIT, "Exiting.");
+        MDC.clear();
+    }
+}
diff --git a/reference/logging-filter/logging-filter-spring/src/main/java/org/onap/logging/filter/spring/MDCTaskDecorator.java b/reference/logging-filter/logging-filter-spring/src/main/java/org/onap/logging/filter/spring/MDCTaskDecorator.java
new file mode 100644
index 0000000..b641b5f
--- /dev/null
+++ b/reference/logging-filter/logging-filter-spring/src/main/java/org/onap/logging/filter/spring/MDCTaskDecorator.java
@@ -0,0 +1,43 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - Logging
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. 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.logging.filter.spring;
+
+import java.util.Map;
+import org.slf4j.MDC;
+import org.springframework.core.task.TaskDecorator;
+
+public class MDCTaskDecorator implements TaskDecorator {
+
+    @Override
+    public Runnable decorate(Runnable runnable) {
+        Map<String, String> contextMap = MDC.getCopyOfContextMap();
+        return () -> {
+            try {
+                if (contextMap != null) {
+                    MDC.setContextMap(contextMap);
+                    runnable.run();
+                }
+            } finally {
+                MDC.clear();
+            }
+        };
+    }
+}
diff --git a/reference/logging-filter/logging-filter-spring/src/main/java/org/onap/logging/filter/spring/SpringClientFilter.java b/reference/logging-filter/logging-filter-spring/src/main/java/org/onap/logging/filter/spring/SpringClientFilter.java
new file mode 100644
index 0000000..6eeee1a
--- /dev/null
+++ b/reference/logging-filter/logging-filter-spring/src/main/java/org/onap/logging/filter/spring/SpringClientFilter.java
@@ -0,0 +1,157 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - Logging
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. 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.logging.filter.spring;
+
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.time.ZoneOffset;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.List;
+import java.util.UUID;
+import org.onap.logging.filter.base.Constants;
+import org.onap.logging.filter.base.MDCSetup;
+import org.onap.logging.filter.base.PropertyUtil;
+import org.onap.logging.ref.slf4j.ONAPLogConstants;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.MDC;
+import org.slf4j.Marker;
+import org.slf4j.MarkerFactory;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpRequest;
+import org.springframework.http.client.ClientHttpRequestExecution;
+import org.springframework.http.client.ClientHttpRequestInterceptor;
+import org.springframework.http.client.ClientHttpResponse;
+import org.springframework.util.StreamUtils;
+
+public class SpringClientFilter implements ClientHttpRequestInterceptor {
+    private final Logger logger = LoggerFactory.getLogger(this.getClass());
+    private static final String TRACE = "trace-#";
+    private MDCSetup mdcSetup = new MDCSetup();
+    private final String partnerName;
+    private static final Marker INVOKE_RETURN = MarkerFactory.getMarker("INVOKE-RETURN");
+
+    public SpringClientFilter() {
+        this.partnerName = getPartnerName();
+    }
+
+    @Override
+    public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution)
+            throws IOException {
+        processRequest(request, body);
+        ClientHttpResponse response = execution.execute(request, body);
+        processResponse(response);
+        return response;
+    }
+
+    protected void processRequest(HttpRequest request, byte[] body) throws IOException {
+        mdcSetup.setInvocationIdFromMDC();
+        setupMDC(request);
+        setupHeaders(request);
+        if (logger.isDebugEnabled()) {
+            logger.debug("===========================request begin================================================");
+            logger.debug("URI         : {}", request.getURI());
+            logger.debug("Method      : {}", request.getMethod());
+            logger.debug("Headers     : {}", request.getHeaders());
+            logger.debug("Request body: {}", new String(body, StandardCharsets.UTF_8));
+            logger.debug("==========================request end================================================");
+        }
+    }
+
+    protected void setupHeaders(HttpRequest clientRequest) {
+        HttpHeaders headers = clientRequest.getHeaders();
+        String requestId = extractRequestID(clientRequest);
+        headers.add(ONAPLogConstants.Headers.REQUEST_ID, requestId);
+        headers.add(Constants.HttpHeaders.HEADER_REQUEST_ID, requestId);
+        headers.add(Constants.HttpHeaders.TRANSACTION_ID, requestId);
+        headers.add(Constants.HttpHeaders.ECOMP_REQUEST_ID, requestId);
+        headers.add(ONAPLogConstants.Headers.INVOCATION_ID, MDC.get(ONAPLogConstants.MDCs.INVOCATION_ID));
+        headers.add(ONAPLogConstants.Headers.PARTNER_NAME, partnerName);
+    }
+
+    protected String extractRequestID(HttpRequest clientRequest) {
+        String requestId = MDC.get(ONAPLogConstants.MDCs.REQUEST_ID);
+        if (requestId == null || requestId.isEmpty() || requestId.equals(TRACE)) {
+            requestId = UUID.randomUUID().toString();
+            mdcSetup.setLogTimestamp();
+            mdcSetup.setElapsedTimeInvokeTimestamp();
+            logger.warn("Could not Find Request ID Generating New One: {}", clientRequest.getURI());
+            MDC.put(ONAPLogConstants.MDCs.REQUEST_ID, requestId);
+        }
+        return requestId;
+    }
+
+    protected void setupMDC(HttpRequest clientRequest) {
+        MDC.put(ONAPLogConstants.MDCs.INVOKE_TIMESTAMP,
+                ZonedDateTime.now(ZoneOffset.UTC).format(DateTimeFormatter.ISO_INSTANT));
+        MDC.put(ONAPLogConstants.MDCs.TARGET_SERVICE_NAME, clientRequest.getURI().toString());
+        MDC.put(ONAPLogConstants.MDCs.RESPONSE_STATUS_CODE, ONAPLogConstants.ResponseStatus.INPROGRESS.toString());
+        MDC.put(ONAPLogConstants.MDCs.TARGET_ENTITY, extractTargetEntity(clientRequest));
+        if (MDC.get(ONAPLogConstants.MDCs.SERVICE_NAME) == null) {
+            MDC.put(ONAPLogConstants.MDCs.SERVICE_NAME, clientRequest.getURI().getPath());
+        }
+        mdcSetup.setServerFQDN();
+    }
+
+    protected String extractTargetEntity(HttpRequest clientRequest) {
+        HttpHeaders headers = clientRequest.getHeaders();
+        String headerTargetEntity = null;
+        List<String> headerTargetEntityList = headers.get(Constants.HttpHeaders.TARGET_ENTITY_HEADER);
+        if (headerTargetEntityList != null && !headerTargetEntityList.isEmpty())
+            headerTargetEntity = headerTargetEntityList.get(0);
+        String targetEntity = MDC.get(ONAPLogConstants.MDCs.TARGET_ENTITY);
+        if (targetEntity != null && !targetEntity.isEmpty()) {
+            return targetEntity;
+        } else if (headerTargetEntity != null && !headerTargetEntity.isEmpty()) {
+            targetEntity = headerTargetEntity;
+        } else {
+            targetEntity = Constants.DefaultValues.UNKNOWN_TARGET_ENTITY;
+            logger.warn("Could not Target Entity: {}", clientRequest.getURI());
+        }
+        return targetEntity;
+    }
+
+    protected void processResponse(ClientHttpResponse response) throws IOException {
+        if (logger.isDebugEnabled()) {
+            logger.debug("============================response begin==========================================");
+            logger.debug("Status code  : {}", response.getStatusCode());
+            logger.debug("Status text  : {}", response.getStatusText());
+            logger.debug("Headers      : {}", response.getHeaders());
+            logger.debug("Response body: {}", StreamUtils.copyToString(response.getBody(), Charset.defaultCharset()));
+            logger.debug("=======================response end=================================================");
+        }
+        mdcSetup.setLogTimestamp();
+        mdcSetup.setElapsedTimeInvokeTimestamp();
+        mdcSetup.setResponseStatusCode(response.getRawStatusCode());
+        int statusCode = response.getRawStatusCode();
+        MDC.put(ONAPLogConstants.MDCs.RESPONSE_CODE, String.valueOf(statusCode));
+        mdcSetup.setResponseDescription(statusCode);
+        logger.info(INVOKE_RETURN, "InvokeReturn");
+        mdcSetup.clearClientMDCs();
+    }
+
+    protected String getPartnerName() {
+        PropertyUtil p = new PropertyUtil();
+        return p.getProperty(Constants.Property.PARTNER_NAME);
+    }
+}
diff --git a/reference/logging-filter/logging-filter-spring/src/test/java/org/onap/logging/filter/spring/LoggingInterceptorTest.java b/reference/logging-filter/logging-filter-spring/src/test/java/org/onap/logging/filter/spring/LoggingInterceptorTest.java
new file mode 100644
index 0000000..1a6d701
--- /dev/null
+++ b/reference/logging-filter/logging-filter-spring/src/test/java/org/onap/logging/filter/spring/LoggingInterceptorTest.java
@@ -0,0 +1,65 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - Logging
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. 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.logging.filter.spring;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.when;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.Spy;
+import org.mockito.junit.MockitoJUnitRunner;
+import org.onap.logging.filter.base.MDCSetup;
+import org.onap.logging.filter.base.SimpleMap;
+import org.onap.logging.ref.slf4j.ONAPLogConstants;
+import org.slf4j.MDC;
+
+@RunWith(MockitoJUnitRunner.class)
+public class LoggingInterceptorTest {
+
+    @Mock
+    private HttpServletRequest request;
+
+    @Mock
+    private HttpServletResponse response;
+
+    @Mock
+    private Object handler;
+
+    @Mock
+    private MDCSetup mdcSetup;
+
+    @Spy
+    @InjectMocks
+    private LoggingInterceptor loggingInterceptor;
+
+    @Test
+    public void preHandleTest() throws Exception {
+        when(mdcSetup.getRequestId(any(SimpleMap.class))).thenReturn("428443e6-eeb2-4e4a-9a8c-2ca9e2bc8067");
+        loggingInterceptor.preHandle(request, response, handler);
+        assertEquals(MDC.get(ONAPLogConstants.MDCs.RESPONSE_STATUS_CODE), "INPROGRESS");
+        assertEquals("428443e6-eeb2-4e4a-9a8c-2ca9e2bc8067", MDC.get(ONAPLogConstants.MDCs.REQUEST_ID));
+    }
+}
diff --git a/reference/logging-filter/logging-filter-spring/src/test/java/org/onap/logging/filter/spring/SpringClientFilterTest.java b/reference/logging-filter/logging-filter-spring/src/test/java/org/onap/logging/filter/spring/SpringClientFilterTest.java
new file mode 100644
index 0000000..9de5d68
--- /dev/null
+++ b/reference/logging-filter/logging-filter-spring/src/test/java/org/onap/logging/filter/spring/SpringClientFilterTest.java
@@ -0,0 +1,166 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - Logging
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. 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.logging.filter.spring;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.when;
+import java.io.IOException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import org.junit.After;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.Spy;
+import org.mockito.junit.MockitoJUnitRunner;
+import org.onap.logging.filter.base.Constants;
+import org.onap.logging.filter.base.MDCSetup;
+import org.onap.logging.ref.slf4j.ONAPLogConstants;
+import org.slf4j.MDC;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpRequest;
+import org.springframework.http.client.ClientHttpRequestExecution;
+import org.springframework.http.client.ClientHttpResponse;
+
+@RunWith(MockitoJUnitRunner.class)
+public class SpringClientFilterTest {
+
+    @Mock
+    private MDCSetup mdcSetup;
+
+    @Mock
+    private ClientHttpResponse response;
+
+    @Mock
+    private HttpRequest clientRequest;
+
+    @Mock
+    private ClientHttpRequestExecution execution;
+
+    @Spy
+    @InjectMocks
+    private SpringClientFilter springClientFilter;
+
+    @After
+    public void tearDown() {
+        MDC.clear();
+    }
+
+    @Test
+    public void processResponseTest() throws IOException {
+        String partnerName = springClientFilter.getPartnerName();
+
+        assertEquals("UNKNOWN", partnerName);
+    }
+
+    @Test
+    public void extractTargetEntityTest() {
+        HttpHeaders headers = new HttpHeaders();
+        headers.add(Constants.HttpHeaders.TARGET_ENTITY_HEADER, "SO");
+        when(clientRequest.getHeaders()).thenReturn(headers);
+
+        String targetEntity = springClientFilter.extractTargetEntity(clientRequest);
+        assertEquals("SO", targetEntity);
+    }
+
+    @Test
+    public void extractTargetEntityMDCTest() {
+        MDC.put(ONAPLogConstants.MDCs.TARGET_ENTITY, "SO");
+        HttpHeaders headers = new HttpHeaders();
+        when(clientRequest.getHeaders()).thenReturn(headers);
+
+        String targetEntity = springClientFilter.extractTargetEntity(clientRequest);
+        assertEquals("SO", targetEntity);
+    }
+
+    @Test
+    public void extractTargetEntityNoHeaderTest() {
+        HttpHeaders headers = new HttpHeaders();
+        when(clientRequest.getHeaders()).thenReturn(headers);
+
+        String targetEntity = springClientFilter.extractTargetEntity(clientRequest);
+        assertEquals("Unknown-Target-Entity", targetEntity);
+    }
+
+    @Test
+    public void setupMDCTest() throws URISyntaxException {
+        doReturn("SO").when(springClientFilter).extractTargetEntity(clientRequest);
+        URI uri = new URI("onap/so/serviceInstances");
+        when(clientRequest.getURI()).thenReturn(uri);
+
+        springClientFilter.setupMDC(clientRequest);
+
+        assertEquals("onap/so/serviceInstances", MDC.get(ONAPLogConstants.MDCs.TARGET_SERVICE_NAME));
+        assertEquals("SO", MDC.get(ONAPLogConstants.MDCs.TARGET_ENTITY));
+        assertEquals("INPROGRESS", MDC.get(ONAPLogConstants.MDCs.RESPONSE_STATUS_CODE));
+        assertNotNull(ONAPLogConstants.MDCs.RESPONSE_STATUS_CODE);
+        assertNotNull(ONAPLogConstants.MDCs.SERVICE_NAME);
+        assertNotNull(ONAPLogConstants.MDCs.SERVER_FQDN);
+    }
+
+    @Test
+    public void setupHeadersTest() {
+        MDC.put(ONAPLogConstants.MDCs.INVOCATION_ID, "8819bfb4-69d2-43fc-b0d6-81d2690533ea");
+        HttpHeaders headers = new HttpHeaders();
+        when(clientRequest.getHeaders()).thenReturn(headers);
+        doReturn("0a908a5d-e774-4558-96ff-6edcbba65483").when(springClientFilter).extractRequestID(clientRequest);
+
+        springClientFilter.setupHeaders(clientRequest);
+
+        assertEquals("0a908a5d-e774-4558-96ff-6edcbba65483", headers.getFirst(ONAPLogConstants.Headers.REQUEST_ID));
+        assertEquals("0a908a5d-e774-4558-96ff-6edcbba65483", headers.getFirst(Constants.HttpHeaders.HEADER_REQUEST_ID));
+        assertEquals("0a908a5d-e774-4558-96ff-6edcbba65483", headers.getFirst(Constants.HttpHeaders.TRANSACTION_ID));
+        assertEquals("0a908a5d-e774-4558-96ff-6edcbba65483", headers.getFirst(Constants.HttpHeaders.TRANSACTION_ID));
+        assertEquals("0a908a5d-e774-4558-96ff-6edcbba65483", headers.getFirst(Constants.HttpHeaders.ECOMP_REQUEST_ID));
+        assertEquals("8819bfb4-69d2-43fc-b0d6-81d2690533ea", headers.getFirst(ONAPLogConstants.Headers.INVOCATION_ID));
+        assertEquals("UNKNOWN", headers.getFirst(ONAPLogConstants.Headers.PARTNER_NAME));
+    }
+
+    @Test
+    public void extractRequestIDTest() {
+        MDC.put(ONAPLogConstants.MDCs.REQUEST_ID, "0a908a5d-e774-4558-96ff-6edcbba65483");
+        String requestId = springClientFilter.extractRequestID(clientRequest);
+        assertEquals("0a908a5d-e774-4558-96ff-6edcbba65483", requestId);
+    }
+
+    @Test
+    public void extractRequestIDNullTest() {
+        String requestId = springClientFilter.extractRequestID(clientRequest);
+        assertNotNull(requestId);
+        assertNotNull(ONAPLogConstants.MDCs.LOG_TIMESTAMP);
+        assertNotNull(ONAPLogConstants.MDCs.ELAPSED_TIME);
+    }
+
+    @Test
+    public void interceptTest() throws IOException {
+        byte[] body = new byte[3];
+        doNothing().when(springClientFilter).processRequest(clientRequest, body);
+        doReturn(response).when(execution).execute(clientRequest, body);
+        doNothing().when(springClientFilter).processResponse(response);
+
+        ClientHttpResponse httpResponse = springClientFilter.intercept(clientRequest, body, execution);
+        assertEquals(response, httpResponse);
+    }
+}