Clean up of Pair classes - models

Removed Pair class from policy-models and replaced with Aoache Common
Pair class

Issue-ID: POLICY-2202
Change-Id: I786467ac02ecb2d433dba94deba45785be3dcf23
Signed-off-by: waynedunican <wayne.dunican@est.tech>

10 files changed, 283 insertions, 336 deletions

diff --git a/models-interactions/model-impl/aai/src/main/java/org/onap/policy/aai/AaiManager.java b/models-interactions/model-impl/aai/src/main/java/org/onap/policy/aai/AaiManager.java
index 81aea9f98..76817dfc6 100644
--- a/models-interactions/model-impl/aai/src/main/java/org/onap/policy/aai/AaiManager.java
+++ b/models-interactions/model-impl/aai/src/main/java/org/onap/policy/aai/AaiManager.java
@@ -3,7 +3,7 @@
  * aai
  * ================================================================================
  * Copyright (C) 2017-2020 AT&T Intellectual Property. All rights reserved.
- * Modifications Copyright (C) 2019 Nordix Foundation.
+ * Modifications Copyright (C) 2019-2020 Nordix Foundation.
  * Modifications Copyright (C) 2019 Samsung Electronics Co., Ltd.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -29,6 +29,7 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.UUID;
 import java.util.stream.Collectors;
+import org.apache.commons.lang3.tuple.Pair;
 import org.json.JSONArray;
 import org.json.JSONObject;
 import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
@@ -37,7 +38,6 @@ import org.onap.policy.common.endpoints.utils.NetLoggerUtil.EventType;
 import org.onap.policy.common.utils.coder.CoderException;
 import org.onap.policy.common.utils.coder.StandardCoder;
 import org.onap.policy.rest.RestManager;
-import org.onap.policy.rest.RestManager.Pair;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -154,17 +154,17 @@ public final class AaiManager {
             return null;
         }
 
-        int httpResponseCode = httpDetails.first;
+        int httpResponseCode = httpDetails.getLeft();
 
         NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, url, "Response code: " + httpResponseCode);
-        NetLoggerUtil.getNetworkLogger().debug(httpDetails.second);
+        NetLoggerUtil.getNetworkLogger().debug(httpDetails.getRight());
 
         logger.debug(url);
         logger.debug("{}", httpResponseCode);
-        logger.debug(httpDetails.second);
+        logger.debug(httpDetails.getRight());
 
-        if (httpDetails.second != null) {
-            return new AaiCqResponse(httpDetails.second);
+        if (httpDetails.getRight() != null) {
+            return new AaiCqResponse(httpDetails.getRight());
         }
         return null;
     }
@@ -197,17 +197,17 @@ public final class AaiManager {
                 return null;
             }
 
-            int httpResponseCode = httpDetailsGet.first;
+            int httpResponseCode = httpDetailsGet.getLeft();
 
             NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, url, "Response code: " + httpResponseCode);
-            NetLoggerUtil.getNetworkLogger().debug(httpDetailsGet.second);
+            NetLoggerUtil.getNetworkLogger().debug(httpDetailsGet.getRight());
 
             logger.debug(urlGet);
             logger.debug("{}", httpResponseCode);
-            logger.debug(httpDetailsGet.second);
+            logger.debug(httpDetailsGet.getRight());
 
-            if (httpResponseCode == 200 && httpDetailsGet.second != null) {
-                return httpDetailsGet.second;
+            if (httpResponseCode == 200 && httpDetailsGet.getRight() != null) {
+                return httpDetailsGet.getRight();
             }
             try {
                 Thread.sleep(1000);
diff --git a/models-interactions/model-impl/aai/src/test/java/org/onap/policy/aai/AaiManagerTest.java b/models-interactions/model-impl/aai/src/test/java/org/onap/policy/aai/AaiManagerTest.java
index 8a007fb4a..33934d937 100644
--- a/models-interactions/model-impl/aai/src/test/java/org/onap/policy/aai/AaiManagerTest.java
+++ b/models-interactions/model-impl/aai/src/test/java/org/onap/policy/aai/AaiManagerTest.java
@@ -3,7 +3,7 @@
  * aai
  * ================================================================================
  * Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
- * Modifications Copyright (C) 2019 Nordix Foundation.
+ * Modifications Copyright (C) 2019-2020 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,10 +37,10 @@ import java.io.IOException;
 import java.nio.file.Files;
 import java.util.Map;
 import java.util.UUID;
+import org.apache.commons.lang3.tuple.Pair;
 import org.junit.Before;
 import org.junit.Test;
 import org.onap.policy.rest.RestManager;
-import org.onap.policy.rest.RestManager.Pair;
 
 public class AaiManagerTest {
     private static final String CQ_QUERY_URL = "http://testing.cq.query";
@@ -66,10 +66,10 @@ public class AaiManagerTest {
 
         String aaiCqResponse = new AaiCqResponseTest().getAaiCqResponse();
         String tenantResponse = this.getTenantQueryResponse();
-        httpCqResponseOk = restManagerMock.new Pair<>(200, aaiCqResponse);
-        httpTenantResponseOk = restManagerMock.new Pair<>(200, tenantResponse);
-        httpResponseErr0 = restManagerMock.new Pair<>(200, null);
-        httpResponseErr1 = restManagerMock.new Pair<>(200, "{");
+        httpCqResponseOk = Pair.of(200, aaiCqResponse);
+        httpTenantResponseOk = Pair.of(200, tenantResponse);
+        httpResponseErr0 = Pair.of(200, null);
+        httpResponseErr1 = Pair.of(200, "{");
 
     }
 
@@ -128,7 +128,7 @@ public class AaiManagerTest {
         String pnfResponse = "{\"pnf-name\":" + pnfName
                                      + ",\"pnf-id\":\"123456\",\"in-maint\":false,\"ipaddress-v4-oam\":\"1.1.1.1\"}";
 
-        Pair<Integer, String> pnfHttpResponse = restManagerMock.new Pair<>(200, pnfResponse);
+        Pair<Integer, String> pnfHttpResponse = Pair.of(200, pnfResponse);
         when(restManagerMock.get(contains(pnfName), eq(DOROTHY), eq("Gale"), anyMap()))
                 .thenReturn(pnfHttpResponse);
 
diff --git a/models-interactions/model-impl/rest/src/main/java/org/onap/policy/rest/RestManager.java b/models-interactions/model-impl/rest/src/main/java/org/onap/policy/rest/RestManager.java
index a452c142f..4f37e9592 100644
--- a/models-interactions/model-impl/rest/src/main/java/org/onap/policy/rest/RestManager.java
+++ b/models-interactions/model-impl/rest/src/main/java/org/onap/policy/rest/RestManager.java
@@ -3,7 +3,7 @@
  * rest
  * ================================================================================
  * Copyright (C) 2017-2020 AT&T Intellectual Property. All rights reserved.
- * Modifications Copyright (C) 2019 Nordix Foundation.
+ * Modifications Copyright (C) 2019-2020 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,6 +25,7 @@ import java.nio.charset.StandardCharsets;
 import java.util.Map;
 import java.util.Map.Entry;
 import javax.xml.bind.DatatypeConverter;
+import org.apache.commons.lang3.tuple.Pair;
 import org.apache.http.HttpHeaders;
 import org.apache.http.HttpResponse;
 import org.apache.http.client.methods.HttpDelete;
@@ -47,29 +48,19 @@ public class RestManager {
     // Constants for string literals
     private static final String CONTENT_TYPE = "Content-Type";
 
-    public class Pair<A, B> {
-        public final A first;
-        public final B second;
-
-        public Pair(A first, B second) {
-            this.first = first;
-            this.second = second;
-        }
-    }
-
     /**
      * Perform REST PUT.
      *
-     * @param url         the url
-     * @param username    the user name
-     * @param password    the password
-     * @param headers     any headers
+     * @param url the url
+     * @param username the user name
+     * @param password the password
+     * @param headers any headers
      * @param contentType what the content type is
-     * @param body        body to send
+     * @param body body to send
      * @return the response status code and the body
      */
-    public Pair<Integer, String> put(String url, String username, String password,
-                                      Map<String, String> headers, String contentType, String body) {
+    public Pair<Integer, String> put(String url, String username, String password, Map<String, String> headers,
+            String contentType, String body) {
         HttpPut put = new HttpPut(url);
         addHeaders(put, username, password, headers);
         put.addHeader(CONTENT_TYPE, contentType);
@@ -87,16 +78,16 @@ public class RestManager {
     /**
      * Perform REST Post.
      *
-     * @param url         the url
-     * @param username    the user name
-     * @param password    the password
-     * @param headers     any headers
+     * @param url the url
+     * @param username the user name
+     * @param password the password
+     * @param headers any headers
      * @param contentType what the content type is
-     * @param body        body to send
+     * @param body body to send
      * @return the response status code and the body
      */
-    public Pair<Integer, String> post(String url, String username, String password,
-                                      Map<String, String> headers, String contentType, String body) {
+    public Pair<Integer, String> post(String url, String username, String password, Map<String, String> headers,
+            String contentType, String body) {
         HttpPost post = new HttpPost(url);
         addHeaders(post, username, password, headers);
         post.addHeader(CONTENT_TYPE, contentType);
@@ -114,14 +105,13 @@ public class RestManager {
     /**
      * Do a REST get.
      *
-     * @param url      URL
+     * @param url URL
      * @param username user name
      * @param password password
-     * @param headers  any headers to add
+     * @param headers any headers to add
      * @return a Pair for the response status and the body
      */
-    public Pair<Integer, String> get(String url, String username, String password,
-                                     Map<String, String> headers) {
+    public Pair<Integer, String> get(String url, String username, String password, Map<String, String> headers) {
         HttpGet get = new HttpGet(url);
         addHeaders(get, username, password, headers);
         return sendRequest(get);
@@ -131,16 +121,16 @@ public class RestManager {
      * Perform REST Delete. <br/>
      * <i>Note: Many REST endpoints will return a 400 error for delete requests with a non-empty body</i>
      *
-     * @param url         the url
-     * @param username    the user name
-     * @param password    the password
-     * @param headers     any headers
+     * @param url the url
+     * @param username the user name
+     * @param password the password
+     * @param headers any headers
      * @param contentType what the content type is
-     * @param body        body (optional) to send
+     * @param body body (optional) to send
      * @return the response status code and the body
      */
     public Pair<Integer, String> delete(String url, String username, String password, Map<String, String> headers,
-                                        String contentType, String body) {
+            String contentType, String body) {
         HttpDeleteWithBody delete = new HttpDeleteWithBody(url);
         addHeaders(delete, username, password, headers);
         if (body != null && !body.isEmpty()) {
@@ -160,10 +150,10 @@ public class RestManager {
     /**
      * Perform REST Delete.
      *
-     * @param url         the url
-     * @param username    the user name
-     * @param password    the password
-     * @param headers     any headers
+     * @param url the url
+     * @param username the user name
+     * @param password the password
+     * @param headers any headers
      * @return the response status code and the body
      */
     public Pair<Integer, String> delete(String url, String username, String password, Map<String, String> headers) {
@@ -175,15 +165,15 @@ public class RestManager {
     /**
      * Perform REST Patch.
      *
-     * @param url         the url
-     * @param username    the user name
-     * @param password    the password
-     * @param headers     any headers
-     * @param body        body to send
+     * @param url the url
+     * @param username the user name
+     * @param password the password
+     * @param headers any headers
+     * @param body body to send
      * @return the response status code and the body
      */
-    public Pair<Integer, String> patch(String url, String username, String password,
-                                       Map<String, String> headers, String body) {
+    public Pair<Integer, String> patch(String url, String username, String password, Map<String, String> headers,
+            String body) {
         String contentType = "application/merge-patch+json";
         HttpPatch patch = new HttpPatch(url);
         addHeaders(patch, username, password, headers);
@@ -211,20 +201,15 @@ public class RestManager {
         }
 
         try (CloseableHttpClient client =
-                     HttpClientBuilder
-                             .create()
-                             .setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
-                             .build()) {
+                HttpClientBuilder.create().setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE).build()) {
             HttpResponse response = client.execute(request);
             if (response != null) {
                 String returnBody = EntityUtils.toString(response.getEntity(), "UTF-8");
-                logger.debug("HTTP Response Status Code: {}",
-                        response.getStatusLine().getStatusCode());
+                logger.debug("HTTP Response Status Code: {}", response.getStatusLine().getStatusCode());
                 logger.debug("HTTP Response Body:");
                 logger.debug(returnBody);
 
-                return new Pair<>(response.getStatusLine().getStatusCode(),
-                        returnBody);
+                return Pair.of(response.getStatusLine().getStatusCode(), returnBody);
             } else {
                 logger.error("Response from {} is null", request.getURI());
                 return null;
@@ -238,13 +223,12 @@ public class RestManager {
     /**
      * Add header to the request.
      *
-     * @param request  http request to send
+     * @param request http request to send
      * @param username the user name
      * @param password the password
-     * @param headers  any headers
+     * @param headers any headers
      */
-    private void addHeaders(HttpRequestBase request, String username, String password, Map<String,
-            String> headers) {
+    private void addHeaders(HttpRequestBase request, String username, String password, Map<String, String> headers) {
         String authHeader = makeAuthHeader(username, password);
         if (headers != null) {
             for (Entry<String, String> entry : headers.entrySet()) {
diff --git a/models-interactions/model-impl/rest/src/test/java/org/onap/policy/rest/PairTest.java b/models-interactions/model-impl/rest/src/test/java/org/onap/policy/rest/PairTest.java
deleted file mode 100644
index 2db9ebca0..000000000
--- a/models-interactions/model-impl/rest/src/test/java/org/onap/policy/rest/PairTest.java
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * ============LICENSE_START=======================================================
- * rest
- * ================================================================================
- * Modifications Copyright (C) 2019 AT&T Intellectual Property. All rights reserved
- * Modifications Copyright (C) 2019 Nordix Foundation.
- * ================================================================================
- * 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.policy.rest;
-
-import static org.junit.Assert.assertEquals;
-
-import org.junit.Test;
-import org.onap.policy.rest.RestManager.Pair;
-
-public class PairTest {
-
-    @Test
-    public void testPair() {
-        RestManager mgr = new RestManager();
-
-        Pair<Integer, Integer> pii = mgr.new Pair<>(1, 2);
-        assertEquals((Integer) 1, pii.first);
-        assertEquals((Integer) 2, pii.second);
-
-        Pair<Integer, String> pis = mgr.new Pair<>(1, "test");
-        assertEquals((Integer) 1, pis.first);
-        assertEquals("test", pis.second);
-    }
-}
diff --git a/models-interactions/model-impl/rest/src/test/java/org/onap/policy/rest/RestTest.java b/models-interactions/model-impl/rest/src/test/java/org/onap/policy/rest/RestTest.java
index 8c241c83e..52c0912e3 100644
--- a/models-interactions/model-impl/rest/src/test/java/org/onap/policy/rest/RestTest.java
+++ b/models-interactions/model-impl/rest/src/test/java/org/onap/policy/rest/RestTest.java
@@ -3,7 +3,7 @@
  * rest
  * ================================================================================
  * Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
- * Modifications Copyright (C) 2019 Nordix Foundation.
+ * Modifications Copyright (C) 2019-2020 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,13 +41,13 @@ import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
 import javax.ws.rs.QueryParam;
 import javax.ws.rs.core.MediaType;
+import org.apache.commons.lang3.tuple.Pair;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import org.onap.policy.common.endpoints.http.server.HttpServletServer;
 import org.onap.policy.common.endpoints.http.server.HttpServletServerFactoryInstance;
 import org.onap.policy.common.utils.network.NetworkUtil;
-import org.onap.policy.rest.RestManager.Pair;
 
 @Path("RestTest")
 public class RestTest {
@@ -144,58 +144,60 @@ public class RestTest {
         RestManager mgr = new RestManager();
 
         Pair<Integer, String> result = mgr.get(getUri, null, null, null);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("GOT: " + EXPECT_STRING, result.second);
+
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("GOT: " + EXPECT_STRING, result.getRight());
 
         result = mgr.delete(deleteUri, null, null, null, null, null);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("DELETE: " + EXPECT_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("DELETE: " + EXPECT_STRING, result.getRight());
 
         result = mgr.delete(deleteUri, null, null, null);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("DELETE: " + EXPECT_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("DELETE: " + EXPECT_STRING, result.getRight());
 
         result = mgr.put(putUri, null, null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PUT: " + PAYLOAD + EXPECT_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PUT: " + PAYLOAD + EXPECT_STRING, result.getRight());
 
         result = mgr.put(putUriBlank, null, null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PUT: " + PAYLOAD + RETURN_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PUT: " + PAYLOAD + RETURN_STRING, result.getRight());
 
         result = mgr.post(postUri, null, null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("POST: " + PAYLOAD + EXPECT_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("POST: " + PAYLOAD + EXPECT_STRING, result.getRight());
 
         result = mgr.post(postUriBlank, null, null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("POST: " + PAYLOAD + RETURN_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("POST: " + PAYLOAD + RETURN_STRING, result.getRight());
 
         result = mgr.patch(patchUri, null, null, null, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PATCH: " + PAYLOAD + EXPECT_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PATCH: " + PAYLOAD + EXPECT_STRING, result.getRight());
 
         result = mgr.patch(patchUriBlank, null, null, null, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PATCH: " + PAYLOAD + RETURN_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PATCH: " + PAYLOAD + RETURN_STRING, result.getRight());
+
     }
 
     @Test
@@ -203,52 +205,54 @@ public class RestTest {
         RestManager mgr = new RestManager();
 
         Pair<Integer, String> result = mgr.get(getUri, "", null, null);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("GOT: " + EXPECT_STRING, result.second);
+
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("GOT: " + EXPECT_STRING, result.getRight());
 
         result = mgr.delete(deleteUri, "", null, null, null, null);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("DELETE: " + EXPECT_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("DELETE: " + EXPECT_STRING, result.getRight());
 
         result = mgr.put(putUri, "", null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PUT: " + PAYLOAD + EXPECT_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PUT: " + PAYLOAD + EXPECT_STRING, result.getRight());
 
         result = mgr.put(putUriBlank, "", null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PUT: " + PAYLOAD + RETURN_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PUT: " + PAYLOAD + RETURN_STRING, result.getRight());
 
         result = mgr.post(postUri, "", null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("POST: " + PAYLOAD + EXPECT_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("POST: " + PAYLOAD + EXPECT_STRING, result.getRight());
 
         result = mgr.post(postUriBlank, "", null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("POST: " + PAYLOAD + RETURN_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("POST: " + PAYLOAD + RETURN_STRING, result.getRight());
 
         result = mgr.patch(patchUri, "", null, null, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PATCH: " + PAYLOAD + EXPECT_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PATCH: " + PAYLOAD + EXPECT_STRING, result.getRight());
 
         result = mgr.patch(patchUriBlank, "", null, null, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PATCH: " + PAYLOAD + RETURN_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PATCH: " + PAYLOAD + RETURN_STRING, result.getRight());
+
     }
 
     @Test
@@ -256,52 +260,54 @@ public class RestTest {
         RestManager mgr = new RestManager();
 
         Pair<Integer, String> result = mgr.get(getUri, "user", null, null);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("GOT: " + EXPECT_STRING, result.second);
+
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("GOT: " + EXPECT_STRING, result.getRight());
 
         result = mgr.delete(deleteUri, "user", null, null, null, null);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("DELETE: " + EXPECT_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("DELETE: " + EXPECT_STRING, result.getRight());
 
         result = mgr.put(putUri, "user", null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PUT: " + PAYLOAD + EXPECT_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PUT: " + PAYLOAD + EXPECT_STRING, result.getRight());
 
         result = mgr.put(putUriBlank, "user", null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PUT: " + PAYLOAD + RETURN_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PUT: " + PAYLOAD + RETURN_STRING, result.getRight());
 
         result = mgr.post(postUri, "user", null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("POST: " + PAYLOAD + EXPECT_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("POST: " + PAYLOAD + EXPECT_STRING, result.getRight());
 
         result = mgr.post(postUriBlank, "user", null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("POST: " + PAYLOAD + RETURN_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("POST: " + PAYLOAD + RETURN_STRING, result.getRight());
 
         result = mgr.patch(patchUri, "user", null, null, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PATCH: " + PAYLOAD + EXPECT_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PATCH: " + PAYLOAD + EXPECT_STRING, result.getRight());
 
         result = mgr.patch(patchUriBlank, "user", null, null, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PATCH: " + PAYLOAD + RETURN_STRING, result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PATCH: " + PAYLOAD + RETURN_STRING, result.getRight());
+
     }
 
     @Test
@@ -309,19 +315,21 @@ public class RestTest {
         RestManager mgr = new RestManager();
 
         Pair<Integer, String> result = mgr.get(baseUri + "RestTest/GetHello/", null, null, null);
-        assertEquals((Integer) 404, result.first);
+
+        assertEquals((Integer) 404, result.getLeft());
 
         result = mgr.delete(baseUri + "RestTest/DeleteHello/", null, null, null, null, null);
-        assertEquals((Integer) 404, result.first);
+        assertEquals((Integer) 404, result.getLeft());
 
         result = mgr.put(baseUri + "RestTest/PutHello/", null, null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 404, result.first);
+        assertEquals((Integer) 404, result.getLeft());
 
         result = mgr.post(baseUri + "RestTest/PostHello/", null, null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 404, result.first);
+        assertEquals((Integer) 404, result.getLeft());
 
         result = mgr.patch(baseUri + "RestTest/PatchHello/", null, null, null, PAYLOAD);
-        assertEquals((Integer) 404, result.first);
+        assertEquals((Integer) 404, result.getLeft());
+
     }
 
     @Test
@@ -329,36 +337,38 @@ public class RestTest {
         RestManager mgr = new RestManager();
 
         Pair<Integer, String> result = mgr.get(baseUri + "RestTest/GetHello/" + NAME_PARAM, null, null, null);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("GOT: " + RETURN_STRING + NAME_PARAM + " aged 90", result.second);
+
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("GOT: " + RETURN_STRING + NAME_PARAM + " aged 90", result.getRight());
 
         result = mgr.delete(baseUri + "RestTest/DeleteHello/" + NAME_PARAM, null, null, null, null, null);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("DELETE: " + RETURN_STRING + NAME_PARAM + " aged 90", result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("DELETE: " + RETURN_STRING + NAME_PARAM + " aged 90", result.getRight());
 
         result = mgr.put(baseUri + "RestTest/PutHello/" + NAME_PARAM, null, null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PUT: " + PAYLOAD + RETURN_STRING + NAME_PARAM + " aged 90", result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PUT: " + PAYLOAD + RETURN_STRING + NAME_PARAM + " aged 90", result.getRight());
 
         result = mgr.post(baseUri + "RestTest/PostHello/" + NAME_PARAM, null, null,
             null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("POST: " + PAYLOAD + RETURN_STRING + NAME_PARAM + " aged 90", result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("POST: " + PAYLOAD + RETURN_STRING + NAME_PARAM + " aged 90", result.getRight());
 
         result = mgr.patch(baseUri + "RestTest/PatchHello/" + NAME_PARAM, null, null,
             null, PAYLOAD);
-        assertEquals((Integer) 200, result.first);
-        assertTrue(result.second != null);
-        assertTrue(result.second.length() > 0);
-        assertEquals("PATCH: " + PAYLOAD + RETURN_STRING + NAME_PARAM + " aged 90", result.second);
+        assertEquals((Integer) 200, result.getLeft());
+        assertTrue(result.getRight() != null);
+        assertTrue(result.getRight().length() > 0);
+        assertEquals("PATCH: " + PAYLOAD + RETURN_STRING + NAME_PARAM + " aged 90", result.getRight());
+
     }
 
     @Test
@@ -366,19 +376,21 @@ public class RestTest {
         RestManager mgr = new RestManager();
 
         Pair<Integer, String> result = mgr.get(baseUri + "NonExistant/URL/", null, null, null);
-        assertEquals((Integer) 404, result.first);
+
+        assertEquals((Integer) 404, result.getLeft());
 
         result = mgr.delete(baseUri + "NonExistant/URL/", null, null, null, null, null);
-        assertEquals((Integer) 404, result.first);
+        assertEquals((Integer) 404, result.getLeft());
 
         result = mgr.put(baseUri + "NonExistant/URL/", null, null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 404, result.first);
+        assertEquals((Integer) 404, result.getLeft());
 
         result = mgr.post(baseUri + "NonExistant/URL/", null, null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 404, result.first);
+        assertEquals((Integer) 404, result.getLeft());
 
         result = mgr.patch(baseUri + "NonExistant/URL/", null, null, null, PAYLOAD);
-        assertEquals((Integer) 404, result.first);
+        assertEquals((Integer) 404, result.getLeft());
+
     }
 
     @Test
@@ -386,22 +398,24 @@ public class RestTest {
         RestManager mgr = new RestManager();
 
         Pair<Integer, String> result = mgr.get(deleteUri, null, null, null);
-        assertEquals((Integer) 405, result.first);
+
+        assertEquals((Integer) 405, result.getLeft());
 
         result = mgr.delete(getUri, null, null, null, null, null);
-        assertEquals((Integer) 405, result.first);
+        assertEquals((Integer) 405, result.getLeft());
 
         result = mgr.delete(getUri, null, null, null);
-        assertEquals((Integer) 405, result.first);
+        assertEquals((Integer) 405, result.getLeft());
 
         result = mgr.put(getUri, null, null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 405, result.first);
+        assertEquals((Integer) 405, result.getLeft());
 
         result = mgr.post(getUri, null, null, null, MediaType.TEXT_PLAIN, PAYLOAD);
-        assertEquals((Integer) 405, result.first);
+        assertEquals((Integer) 405, result.getLeft());
 
         result = mgr.patch(getUri, null, null, null, PAYLOAD);
-        assertEquals((Integer) 405, result.first);
+        assertEquals((Integer) 405, result.getLeft());
+
     }
 
     @GET
diff --git a/models-interactions/model-impl/sdnc/src/main/java/org/onap/policy/sdnc/SdncManager.java b/models-interactions/model-impl/sdnc/src/main/java/org/onap/policy/sdnc/SdncManager.java
index 65b655936..ec423c758 100644
--- a/models-interactions/model-impl/sdnc/src/main/java/org/onap/policy/sdnc/SdncManager.java
+++ b/models-interactions/model-impl/sdnc/src/main/java/org/onap/policy/sdnc/SdncManager.java
@@ -3,7 +3,7 @@
  * Copyright (C) 2018 Huawei. All rights reserved.
  * ================================================================================
  * Modifications Copyright (C) 2019-2020 AT&T Intellectual Property. All rights reserved
- * Modifications Copyright (C) 2019 Nordix Foundation.
+ * Modifications Copyright (C) 2019-2020 Nordix Foundation.
  * Modifications Copyright (C) 2019 Samsung Electronics Co., Ltd.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -25,11 +25,11 @@ package org.onap.policy.sdnc;
 import com.google.gson.JsonSyntaxException;
 import java.util.HashMap;
 import java.util.Map;
+import org.apache.commons.lang3.tuple.Pair;
 import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
 import org.onap.policy.common.endpoints.utils.NetLoggerUtil;
 import org.onap.policy.common.endpoints.utils.NetLoggerUtil.EventType;
 import org.onap.policy.rest.RestManager;
-import org.onap.policy.rest.RestManager.Pair;
 import org.onap.policy.sdnc.util.Serialization;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -125,9 +125,9 @@ public final class SdncManager implements Runnable {
         }
 
         try {
-            SdncResponse response = Serialization.gsonPretty.fromJson(httpDetails.second, SdncResponse.class);
-            NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, sdncUrl, httpDetails.second);
-            logger.info("[IN|{}|{}|]{}{}", "Sdnc", sdncUrl, NetLoggerUtil.SYSTEM_LS, httpDetails.second);
+            SdncResponse response = Serialization.gsonPretty.fromJson(httpDetails.getRight(), SdncResponse.class);
+            NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, sdncUrl, httpDetails.getRight());
+            logger.info("[IN|{}|{}|]{}{}", "Sdnc", sdncUrl, NetLoggerUtil.SYSTEM_LS, httpDetails.getRight());
             String body = Serialization.gsonPretty.toJson(response);
             logger.info("Response to Sdnc Heal post:");
             logger.info(body);
@@ -135,7 +135,8 @@ public final class SdncManager implements Runnable {
 
             if (!"200".equals(response.getResponseOutput().getResponseCode())) {
                 logger.info(
-                    "Sdnc Heal Restcall failed with http error code {} {}", httpDetails.first, httpDetails.second
+                    "Sdnc Heal Restcall failed with http error code {} {}", 
+                    httpDetails.getLeft(), httpDetails.getRight()
                 );
             }
 
diff --git a/models-interactions/model-impl/sdnc/src/test/java/org/onap/policy/sdnc/SdncManagerTest.java b/models-interactions/model-impl/sdnc/src/test/java/org/onap/policy/sdnc/SdncManagerTest.java
index b962ce8c7..45461de43 100644
--- a/models-interactions/model-impl/sdnc/src/test/java/org/onap/policy/sdnc/SdncManagerTest.java
+++ b/models-interactions/model-impl/sdnc/src/test/java/org/onap/policy/sdnc/SdncManagerTest.java
@@ -5,7 +5,7 @@
  * Copyright (C) 2018 Huawei. All rights reserved.
  * ================================================================================
  * Modifications Copyright (C) 2019-2020 AT&T Intellectual Property. All rights reserved
- * Modifications Copyright (C) 2019 Nordix Foundation.
+ * Modifications Copyright (C) 2019-2020 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -34,10 +34,10 @@ import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 import java.util.UUID;
+import org.apache.commons.lang3.tuple.Pair;
 import org.junit.Before;
 import org.junit.Test;
 import org.onap.policy.rest.RestManager;
-import org.onap.policy.rest.RestManager.Pair;
 import org.onap.policy.sdnc.SdncManager.SdncCallback;
 import org.onap.policy.sdnc.util.Serialization;
 
@@ -62,9 +62,9 @@ public class SdncManagerTest implements SdncCallback {
     public void setupMockedRest() {
         mockedRestManager   = mock(RestManager.class);
 
-        httpResponsePutOk       = mockedRestManager.new Pair<>(202, Serialization.gsonPretty.toJson(response));
-        httpResponseBadResponse = mockedRestManager.new Pair<>(202, Serialization.gsonPretty.toJson(null));
-        httpResponseErr         = mockedRestManager.new Pair<>(200, null);
+        httpResponsePutOk       = Pair.of(202, Serialization.gsonPretty.toJson(response));
+        httpResponseBadResponse = Pair.of(202, Serialization.gsonPretty.toJson(null));
+        httpResponseErr         = Pair.of(200, null);
     }
 
     /**
diff --git a/models-interactions/model-impl/so/src/main/java/org/onap/policy/so/SoManager.java b/models-interactions/model-impl/so/src/main/java/org/onap/policy/so/SoManager.java
index 51cca5225..5b8aef264 100644
--- a/models-interactions/model-impl/so/src/main/java/org/onap/policy/so/SoManager.java
+++ b/models-interactions/model-impl/so/src/main/java/org/onap/policy/so/SoManager.java
@@ -3,7 +3,7 @@
  * so
  * ================================================================================
  * Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
- * Modifications Copyright (C) 2019 Nordix Foundation.
+ * Modifications Copyright (C) 2019-2020 Nordix Foundation.
  * Modifications Copyright (C) 2019 Samsung Electronics Co., Ltd.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -30,19 +30,18 @@ import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
+import org.apache.commons.lang3.tuple.Pair;
 import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
 import org.onap.policy.common.endpoints.utils.NetLoggerUtil;
 import org.onap.policy.common.endpoints.utils.NetLoggerUtil.EventType;
 import org.onap.policy.rest.RestManager;
-import org.onap.policy.rest.RestManager.Pair;
 import org.onap.policy.so.util.Serialization;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-
 /**
- * This class handles the interface towards SO (Service Orchestrator) for the ONAP Policy
- * Framework. The SO API is defined at this link:
+ * This class handles the interface towards SO (Service Orchestrator) for the ONAP Policy Framework. The SO API is
+ * defined at this link:
  * http://onap.readthedocs.io/en/latest/submodules/so.git/docs/SO_R1_Interface.html#get-orchestration-request
  *
  */
@@ -97,13 +96,13 @@ public final class SoManager {
      * @return the SO Response object
      */
     public SoResponse createModuleInstance(final String url, final String urlBase, final String username,
-                    final String password, final SoRequest request) {
+            final String password, final SoRequest request) {
         // Issue the HTTP POST request to SO to create the service instance
         String requestJson = Serialization.gsonPretty.toJson(request);
         NetLoggerUtil.getNetworkLogger().info("[OUT|{}|{}|{}|{}|{}|{}|]{}{}", "SO", url, username, password,
-                        createSimpleHeaders(), MEDIA_TYPE, LINE_SEPARATOR, requestJson);
+                createSimpleHeaders(), MEDIA_TYPE, LINE_SEPARATOR, requestJson);
         Pair<Integer, String> httpResponse =
-                        restManager.post(url, username, password, createSimpleHeaders(), MEDIA_TYPE, requestJson);
+                restManager.post(url, username, password, createSimpleHeaders(), MEDIA_TYPE, requestJson);
 
         // Process the response from SO
         SoResponse response = waitForSoOperationCompletion(urlBase, username, password, url, httpResponse);
@@ -115,34 +114,29 @@ public final class SoManager {
     }
 
     /**
-     * Works just like SOManager#asyncSORestCall(String, WorkingMemory, String, String, String, SORequest)
-     * except the vfModuleInstanceId is always null.
+     * Works just like SOManager#asyncSORestCall(String, WorkingMemory, String, String, String, SORequest) except the
+     * vfModuleInstanceId is always null.
      *
      */
     public Future<SoResponse> asyncSoRestCall(final String requestId, final SoCallback callback,
-                                              final String serviceInstanceId, final String vnfInstanceId,
-                                              final SoRequest request) {
+            final String serviceInstanceId, final String vnfInstanceId, final SoRequest request) {
         return asyncSoRestCall(requestId, callback, serviceInstanceId, vnfInstanceId, null, request);
     }
 
     /**
-     * This method makes an asynchronous Rest call to MSO and inserts the response into
-     * Drools working memory.
+     * This method makes an asynchronous Rest call to MSO and inserts the response into Drools working memory.
      *
-     * @param requestId          the request id
-     * @param callback           callback method
-     * @param serviceInstanceId  service instance id to construct the request url
-     * @param vnfInstanceId      vnf instance id to construct the request url
+     * @param requestId the request id
+     * @param callback callback method
+     * @param serviceInstanceId service instance id to construct the request url
+     * @param vnfInstanceId vnf instance id to construct the request url
      * @param vfModuleInstanceId vfModule instance id to construct the request url (required in case of delete vf
-     *                           module)
-     * @param request            the SO request
+     *        module)
+     * @param request the SO request
      * @return a concurrent Future for the thread that handles the request
      */
-    public Future<SoResponse> asyncSoRestCall(final String requestId,
-            final SoCallback callback,
-            final String serviceInstanceId,
-            final String vnfInstanceId,
-            final String vfModuleInstanceId,
+    public Future<SoResponse> asyncSoRestCall(final String requestId, final SoCallback callback,
+            final String serviceInstanceId, final String vnfInstanceId, final String vfModuleInstanceId,
             final SoRequest request) {
         return executors.submit(new AsyncSoRestCallThread(requestId, callback, serviceInstanceId, vnfInstanceId,
                 vfModuleInstanceId, request, this));
@@ -165,17 +159,15 @@ public final class SoManager {
         /**
          * Constructor, sets the context of the request.
          *
-         * @param requestID          The request ID
-         * @param wm                 reference to the Drools working memory
-         * @param serviceInstanceId  the service instance in SO to use
-         * @param vnfInstanceId      the VNF instance that is the subject of the request
+         * @param requestID The request ID
+         * @param wm reference to the Drools working memory
+         * @param serviceInstanceId the service instance in SO to use
+         * @param vnfInstanceId the VNF instance that is the subject of the request
          * @param vfModuleInstanceId the vf module instance id (not null in case of delete vf module request)
-         * @param request            the request itself
+         * @param request the request itself
          */
-        private AsyncSoRestCallThread(final String requestId,
-                final SoCallback callback, final String serviceInstanceId,
-                final String vnfInstanceId, final String vfModuleInstanceId,
-                final SoRequest request,
+        private AsyncSoRestCallThread(final String requestId, final SoCallback callback, final String serviceInstanceId,
+                final String vnfInstanceId, final String vfModuleInstanceId, final SoRequest request,
                 final SoManager callingSoManager) {
             this.requestId = requestId;
             this.callback = callback;
@@ -199,15 +191,14 @@ public final class SoManager {
             String initialUrl = null;
             Pair<Integer, String> httpResponse = null;
 
-            if (request.getOperationType() != null && request.getOperationType()
-                    .equals(SoOperationType.SCALE_OUT)) {
+            if (request.getOperationType() != null && request.getOperationType().equals(SoOperationType.SCALE_OUT)) {
                 initialUrl = this.baseUrl + "/serviceInstantiation/v7/serviceInstances/" + serviceInstanceId + "/vnfs/"
-                                + vnfInstanceId + "/vfModules/scaleOut";
+                        + vnfInstanceId + "/vfModules/scaleOut";
                 NetLoggerUtil.log(EventType.OUT, CommInfrastructure.REST, initialUrl, soJson);
-                httpResponse = restManager.post(initialUrl, this.user, this.password, createSimpleHeaders(),
-                        MEDIA_TYPE, soJson);
-            } else if (request.getOperationType() != null && request.getOperationType()
-                    .equals(SoOperationType.DELETE_VF_MODULE)) {
+                httpResponse = restManager.post(initialUrl, this.user, this.password, createSimpleHeaders(), MEDIA_TYPE,
+                        soJson);
+            } else if (request.getOperationType() != null
+                    && request.getOperationType().equals(SoOperationType.DELETE_VF_MODULE)) {
                 initialUrl = this.baseUrl + "/serviceInstances/v7/" + serviceInstanceId + "/vnfs/" + vnfInstanceId
                         + "/vfModules/" + vfModuleInstanceId;
                 NetLoggerUtil.log(EventType.OUT, CommInfrastructure.REST, initialUrl, soJson);
@@ -218,8 +209,8 @@ public final class SoManager {
             }
 
             // Process the response from SO
-            SoResponse response = waitForSoOperationCompletion(this.baseUrl, this.user, this.password, initialUrl,
-                    httpResponse);
+            SoResponse response =
+                    waitForSoOperationCompletion(this.baseUrl, this.user, this.password, initialUrl, httpResponse);
 
             // Return the response to Drools in its working memory
             SoResponseWrapper soWrapper = new SoResponseWrapper(response, requestId);
@@ -242,8 +233,7 @@ public final class SoManager {
      * @return The parsed final response of SO to the request
      */
     private SoResponse waitForSoOperationCompletion(final String urlBaseSo, final String username,
-                    final String password, final String initialRequestUrl,
-                    final Pair<Integer, String> initialHttpResponse) {
+            final String password, final String initialRequestUrl, final Pair<Integer, String> initialHttpResponse) {
         // Process the initial response from SO, the response to a post
         SoResponse response = processSoResponse(initialRequestUrl, initialHttpResponse);
         if (SO_RESPONSE_ERROR == response.getHttpResponseCode()) {
@@ -278,7 +268,7 @@ public final class SoManager {
 
             // Issue a GET to find the current status of our request
             NetLoggerUtil.getNetworkLogger().info("[OUT|{}|{}|{}|{}|{}|{}|]{}", "SO", urlGet, username, password,
-                            createSimpleHeaders(), MEDIA_TYPE, LINE_SEPARATOR);
+                    createSimpleHeaders(), MEDIA_TYPE, LINE_SEPARATOR);
             Pair<Integer, String> httpResponse = restManager.get(urlGet, username, password, createSimpleHeaders());
 
             // Get our response
@@ -309,7 +299,7 @@ public final class SoManager {
         // A null httpDetails indicates a HTTP problem, a valid response from SO must be
         // either 200
         // or 202
-        if (!httpResultIsNullFree(httpResponse) || (httpResponse.first != 200 && httpResponse.first != 202)) {
+        if (!httpResultIsNullFree(httpResponse) || (httpResponse.getLeft() != 200 && httpResponse.getLeft() != 202)) {
             logger.error("Invalid HTTP response received from SO");
             response.setHttpResponseCode(SO_RESPONSE_ERROR);
             return response;
@@ -317,7 +307,7 @@ public final class SoManager {
 
         // Parse the JSON of the response into our POJO
         try {
-            response = Serialization.gsonPretty.fromJson(httpResponse.second, SoResponse.class);
+            response = Serialization.gsonPretty.fromJson(httpResponse.getRight(), SoResponse.class);
         } catch (JsonSyntaxException e) {
             logger.error("Failed to deserialize HTTP response into SOResponse: ", e);
             response.setHttpResponseCode(SO_RESPONSE_ERROR);
@@ -326,14 +316,14 @@ public final class SoManager {
 
         // Set the HTTP response code of the response if needed
         if (response.getHttpResponseCode() == 0) {
-            response.setHttpResponseCode(httpResponse.first);
+            response.setHttpResponseCode(httpResponse.getLeft());
         }
 
-        NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, requestUrl, httpResponse.second);
+        NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, requestUrl, httpResponse.getRight());
 
         if (logger.isDebugEnabled()) {
             logger.debug("***** Response to SO Request to URL {}:", requestUrl);
-            logger.debug(httpResponse.second);
+            logger.debug(httpResponse.getRight());
         }
 
         return response;
@@ -356,7 +346,7 @@ public final class SoManager {
      */
     private boolean isRequestStateDefined(final SoResponse response) {
         return response != null && response.getRequest() != null && response.getRequest().getRequestStatus() != null
-                        && response.getRequest().getRequestStatus().getRequestState() != null;
+                && response.getRequest().getRequestStatus().getRequestState() != null;
     }
 
     /**
@@ -367,7 +357,7 @@ public final class SoManager {
      * @return true if the request for the response is finished
      */
     private boolean isRequestStateFinished(final Pair<Integer, String> latestHttpDetails, final SoResponse response) {
-        if (latestHttpDetails != null && 200 == latestHttpDetails.first && isRequestStateDefined(response)) {
+        if (latestHttpDetails != null && 200 == latestHttpDetails.getLeft() && isRequestStateDefined(response)) {
             String requestState = response.getRequest().getRequestStatus().getRequestState();
             return "COMPLETE".equalsIgnoreCase(requestState) || "FAILED".equalsIgnoreCase(requestState);
         } else {
@@ -382,7 +372,8 @@ public final class SoManager {
      * @return true if no nulls are found
      */
     private boolean httpResultIsNullFree(Pair<Integer, String> httpOperationResult) {
-        return httpOperationResult != null && httpOperationResult.first != null && httpOperationResult.second != null;
+        return httpOperationResult != null && httpOperationResult.getLeft() != null
+                && httpOperationResult.getRight() != null;
     }
 
     /**
diff --git a/models-interactions/model-impl/vfc/src/main/java/org/onap/policy/vfc/VfcManager.java b/models-interactions/model-impl/vfc/src/main/java/org/onap/policy/vfc/VfcManager.java
index 17f8a58f3..64d60ba1e 100644
--- a/models-interactions/model-impl/vfc/src/main/java/org/onap/policy/vfc/VfcManager.java
+++ b/models-interactions/model-impl/vfc/src/main/java/org/onap/policy/vfc/VfcManager.java
@@ -1,7 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  * Copyright (C) 2017-2019 Intel Corp. All rights reserved.
- * Modifications Copyright (C) 2019 Nordix Foundation.
+ * Modifications Copyright (C) 2019-2020 Nordix Foundation.
  * Modifications Copyright (C) 2018-2019 AT&T Corporation. All rights reserved.
  * Modifications Copyright (C) 2019 Samsung Electronics Co., Ltd.
  * ================================================================================
@@ -24,11 +24,11 @@ package org.onap.policy.vfc;
 import com.google.gson.JsonSyntaxException;
 import java.util.HashMap;
 import java.util.Map;
+import org.apache.commons.lang3.tuple.Pair;
 import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
 import org.onap.policy.common.endpoints.utils.NetLoggerUtil;
 import org.onap.policy.common.endpoints.utils.NetLoggerUtil.EventType;
 import org.onap.policy.rest.RestManager;
-import org.onap.policy.rest.RestManager.Pair;
 import org.onap.policy.vfc.util.Serialization;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -117,7 +117,7 @@ public final class VfcManager implements Runnable {
             return;
         }
 
-        if (httpDetails.first != 202) {
+        if (httpDetails.getLeft() != 202) {
             logger.warn("VFC Heal Restcall failed");
             return;
         }
@@ -144,8 +144,8 @@ public final class VfcManager implements Runnable {
      */
     private void handleVfcResponse(Map<String, String> headers, Pair<Integer, String> httpDetails, String vfcUrl)
             throws InterruptedException {
-        VfcResponse response = Serialization.gsonPretty.fromJson(httpDetails.second, VfcResponse.class);
-        NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, vfcUrl, httpDetails.second);
+        VfcResponse response = Serialization.gsonPretty.fromJson(httpDetails.getRight(), VfcResponse.class);
+        NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, vfcUrl, httpDetails.getRight());
         String body = Serialization.gsonPretty.toJson(response);
         logger.debug("Response to VFC Heal post:");
         logger.debug(body);
@@ -159,15 +159,15 @@ public final class VfcManager implements Runnable {
         while (attemptsLeft-- > 0) {
             NetLoggerUtil.getNetworkLogger().info("[OUT|{}|{}|]", "VFC", urlGet);
             Pair<Integer, String> httpDetailsGet = restManager.get(urlGet, username, password, headers);
-            responseGet = Serialization.gsonPretty.fromJson(httpDetailsGet.second, VfcResponse.class);
-            NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, vfcUrl, httpDetailsGet.second);
+            responseGet = Serialization.gsonPretty.fromJson(httpDetailsGet.getRight(), VfcResponse.class);
+            NetLoggerUtil.log(EventType.IN, CommInfrastructure.REST, vfcUrl, httpDetailsGet.getRight());
             responseGet.setRequestId(vfcRequest.getRequestId().toString());
             body = Serialization.gsonPretty.toJson(responseGet);
             logger.debug("Response to VFC Heal get:");
             logger.debug(body);
 
             String responseStatus = responseGet.getResponseDescriptor().getStatus();
-            if (httpDetailsGet.first == 200
+            if (httpDetailsGet.getLeft() == 200
                     && ("finished".equalsIgnoreCase(responseStatus) || "error".equalsIgnoreCase(responseStatus))) {
                 logger.debug("VFC Heal Status {}", responseGet.getResponseDescriptor().getStatus());
                 this.callback.onResponse(responseGet);
diff --git a/models-interactions/model-impl/vfc/src/test/java/org/onap/policy/vfc/VfcManagerTest.java b/models-interactions/model-impl/vfc/src/test/java/org/onap/policy/vfc/VfcManagerTest.java
index 8db3438cc..fbe29c384 100644
--- a/models-interactions/model-impl/vfc/src/test/java/org/onap/policy/vfc/VfcManagerTest.java
+++ b/models-interactions/model-impl/vfc/src/test/java/org/onap/policy/vfc/VfcManagerTest.java
@@ -3,7 +3,7 @@
  * vfc
  * ================================================================================
  * Copyright (C) 2018-2020 AT&T Intellectual Property. All rights reserved.
- * Modifications Copyright (C) 2019 Nordix Foundation.. All rights reserved.
+ * Modifications Copyright (C) 2019-2020 Nordix Foundation.. All rights reserved.
  * Modifications Copyright (C) 2018-2019 AT&T Corporation. All rights reserved.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -35,10 +35,10 @@ import static org.mockito.Mockito.when;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.UUID;
+import org.apache.commons.lang3.tuple.Pair;
 import org.junit.Before;
 import org.junit.Test;
 import org.onap.policy.rest.RestManager;
-import org.onap.policy.rest.RestManager.Pair;
 import org.onap.policy.vfc.VfcManager.VfcCallback;
 import org.onap.policy.vfc.util.Serialization;
 
@@ -64,9 +64,9 @@ public class VfcManagerTest implements VfcCallback {
     public void setupMockedRest() {
         mockedRestManager   = mock(RestManager.class);
 
-        httpResponsePutOk       = mockedRestManager.new Pair<>(202, Serialization.gsonPretty.toJson(response));
-        httpResponseBadResponse = mockedRestManager.new Pair<>(202, Serialization.gsonPretty.toJson(null));
-        httpResponseErr         = mockedRestManager.new Pair<>(200, null);
+        httpResponsePutOk       = Pair.of(202, Serialization.gsonPretty.toJson(response));
+        httpResponseBadResponse = Pair.of(202, Serialization.gsonPretty.toJson(null));
+        httpResponseErr         = Pair.of(200, null);
     }
 
     /**