Fixed various sonar identified code smells

- introduced a few String constants,
- removed unused code,
- added @FunctionalInterface annotation,
- made most fields private (when possible)

Change-Id: If8c523125de6a5e5c756e18bd04efd548b19ba91
Issue-ID: CLAMP-346
Signed-off-by: p.borelowski <p.borelowski@partner.samsung.com>

4 files changed, 300 insertions, 308 deletions

diff --git a/src/main/java/org/onap/clamp/clds/ClampServlet.java b/src/main/java/org/onap/clamp/clds/ClampServlet.java
index e8fd83e2e..90d0693d1 100644
--- a/src/main/java/org/onap/clamp/clds/ClampServlet.java
+++ b/src/main/java/org/onap/clamp/clds/ClampServlet.java
@@ -5,6 +5,8 @@
  * Copyright (C) 2018 AT&T Intellectual Property. All rights
  *                             reserved.
  * ================================================================================
+ * Modifications Copyright (c) 2019 Samsung
+ * ================================================================================
  * 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
@@ -25,16 +27,6 @@ package org.onap.clamp.clds;
 
 import com.att.eelf.configuration.EELFLogger;
 import com.att.eelf.configuration.EELFManager;
-
-import java.io.IOException;
-import java.security.Principal;
-import java.util.ArrayList;
-import java.util.List;
-
-import javax.servlet.ServletException;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-
 import org.apache.camel.component.servlet.CamelHttpTransportServlet;
 import org.onap.clamp.clds.service.SecureServicePermission;
 import org.springframework.context.ApplicationContext;
@@ -47,6 +39,14 @@ import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.security.core.userdetails.User;
 import org.springframework.web.context.support.WebApplicationContextUtils;
 
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.security.Principal;
+import java.util.ArrayList;
+import java.util.List;
+
 public class ClampServlet extends CamelHttpTransportServlet {
 
     /**
@@ -54,24 +54,27 @@ public class ClampServlet extends CamelHttpTransportServlet {
      */
     private static final long serialVersionUID = -4198841134910211542L;
 
-    protected static final EELFLogger logger = EELFManager.getInstance().getLogger(ClampServlet.class);
-    public static final String PERM_INSTANCE = "clamp.config.security.permission.instance";
-    public static final String PERM_CL = "clamp.config.security.permission.type.cl";
-    public static final String PERM_TEMPLATE = "clamp.config.security.permission.type.template";
-    public static final String PERM_VF = "clamp.config.security.permission.type.filter.vf";
-    public static final String PERM_MANAGE = "clamp.config.security.permission.type.cl.manage";
-    public static final String PERM_TOSCA = "clamp.config.security.permission.type.tosca";
-    public static final String AUTHENTICATION_CLASS = "clamp.config.security.authentication.class";
+    private static final EELFLogger logger = EELFManager.getInstance().getLogger(ClampServlet.class);
+    private static final String PERM_INSTANCE = "clamp.config.security.permission.instance";
+    private static final String PERM_CL = "clamp.config.security.permission.type.cl";
+    private static final String PERM_TEMPLATE = "clamp.config.security.permission.type.template";
+    private static final String PERM_VF = "clamp.config.security.permission.type.filter.vf";
+    private static final String PERM_MANAGE = "clamp.config.security.permission.type.cl.manage";
+    private static final String PERM_TOSCA = "clamp.config.security.permission.type.tosca";
+    private static final String AUTHENTICATION_CLASS = "clamp.config.security.authentication.class";
+    private static final String READ = "read";
+    private static final String UPDATE = "update";
+
     private static List<SecureServicePermission> permissionList;
 
     private synchronized Class loadDynamicAuthenticationClass() {
         try {
             String authenticationObject = WebApplicationContextUtils.getWebApplicationContext(getServletContext())
-                .getEnvironment().getProperty(AUTHENTICATION_CLASS);
+                    .getEnvironment().getProperty(AUTHENTICATION_CLASS);
             return Class.forName(authenticationObject);
         } catch (ClassNotFoundException e) {
             logger.error(
-                "Exception caught when attempting to create associated class of config:" + AUTHENTICATION_CLASS, e);
+                    "Exception caught when attempting to create associated class of config:" + AUTHENTICATION_CLASS, e);
             return Object.class;
         }
     }
@@ -80,24 +83,24 @@ public class ClampServlet extends CamelHttpTransportServlet {
         if (permissionList == null) {
             permissionList = new ArrayList<>();
             ApplicationContext applicationContext = WebApplicationContextUtils
-                .getWebApplicationContext(getServletContext());
+                    .getWebApplicationContext(getServletContext());
             String cldsPermissionInstance = applicationContext.getEnvironment().getProperty(PERM_INSTANCE);
             permissionList.add(SecureServicePermission.create(applicationContext.getEnvironment().getProperty(PERM_CL),
-                cldsPermissionInstance, "read"));
+                    cldsPermissionInstance, READ));
             permissionList.add(SecureServicePermission.create(applicationContext.getEnvironment().getProperty(PERM_CL),
-                cldsPermissionInstance, "update"));
+                    cldsPermissionInstance, UPDATE));
             permissionList.add(SecureServicePermission.create(
-                applicationContext.getEnvironment().getProperty(PERM_TEMPLATE), cldsPermissionInstance, "read"));
+                    applicationContext.getEnvironment().getProperty(PERM_TEMPLATE), cldsPermissionInstance, READ));
             permissionList.add(SecureServicePermission.create(
-                applicationContext.getEnvironment().getProperty(PERM_TEMPLATE), cldsPermissionInstance, "update"));
+                    applicationContext.getEnvironment().getProperty(PERM_TEMPLATE), cldsPermissionInstance, UPDATE));
             permissionList.add(SecureServicePermission.create(applicationContext.getEnvironment().getProperty(PERM_VF),
-                cldsPermissionInstance, "*"));
+                    cldsPermissionInstance, "*"));
             permissionList.add(SecureServicePermission
-                .create(applicationContext.getEnvironment().getProperty(PERM_MANAGE), cldsPermissionInstance, "*"));
+                    .create(applicationContext.getEnvironment().getProperty(PERM_MANAGE), cldsPermissionInstance, "*"));
             permissionList.add(SecureServicePermission
-                .create(applicationContext.getEnvironment().getProperty(PERM_TOSCA), cldsPermissionInstance, "read"));
+                    .create(applicationContext.getEnvironment().getProperty(PERM_TOSCA), cldsPermissionInstance, READ));
             permissionList.add(SecureServicePermission
-                .create(applicationContext.getEnvironment().getProperty(PERM_TOSCA), cldsPermissionInstance, "update"));
+                    .create(applicationContext.getEnvironment().getProperty(PERM_TOSCA), cldsPermissionInstance, UPDATE));
         }
         return permissionList;
     }
@@ -107,8 +110,7 @@ public class ClampServlet extends CamelHttpTransportServlet {
      * to isUserInRole will invoke a http call to AAF server.
      */
     @Override
-    protected void doService(HttpServletRequest request, HttpServletResponse response)
-        throws ServletException, IOException {
+    protected void doService(HttpServletRequest request, HttpServletResponse response) {
         Principal principal = request.getUserPrincipal();
         if (loadDynamicAuthenticationClass().isInstance(principal)) {
             // When AAF is enabled, there is a need to provision the permissions to Spring
@@ -121,7 +123,7 @@ public class ClampServlet extends CamelHttpTransportServlet {
                 }
             }
             Authentication auth = new UsernamePasswordAuthenticationToken(new User(principal.getName(), "", grantedAuths), "",
-                grantedAuths);
+                    grantedAuths);
             SecurityContextHolder.getContext().setAuthentication(auth);
         }
         try {
@@ -134,6 +136,5 @@ public class ClampServlet extends CamelHttpTransportServlet {
                 logger.error("Exception caught when executing HTTP sendError in servlet", e);
             }
         }
-
     }
 }
\ No newline at end of file
diff --git a/src/main/java/org/onap/clamp/clds/camel/CamelProxy.java b/src/main/java/org/onap/clamp/clds/camel/CamelProxy.java
index a74f4c702..f6265982b 100644
--- a/src/main/java/org/onap/clamp/clds/camel/CamelProxy.java
+++ b/src/main/java/org/onap/clamp/clds/camel/CamelProxy.java
@@ -5,6 +5,8 @@
  * Copyright (C) 2018 AT&T Intellectual Property. All rights
  *                             reserved.
  * ================================================================================
+ * Modifications Copyright (c) 2019 Samsung
+ * ================================================================================
  * 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
@@ -18,7 +20,7 @@
  * limitations under the License.
  * ============LICENSE_END============================================
  * ===================================================================
- * 
+ *
  */
 
 package org.onap.clamp.clds.camel;
@@ -29,41 +31,32 @@ import org.apache.camel.ExchangeProperty;
  * This interface describes the CamelProxy parameters that must be passed to the
  * Camel flow.
  */
+@FunctionalInterface
 public interface CamelProxy {
 
     /**
      * This method is called when invoking a camel flow.
-     * 
-     * @param actionCommand
-     *            The action coming from the Clamp UI (like SUBMIT, UPDATE,
-     *            DELETE, ...)
-     * @param modelProperties
-     *            The Model properties created based on the BPMN Json and
-     *            Properties Json
-     * @param modelBpmnProperties
-     *            The Json with all the properties describing the flow
-     * @param modelName
-     *            The model name
-     * @param controlName
-     *            The control loop name
-     * @param docText
-     *            The Global properties JSON containing YAML (coming from CLamp
-     *            template)
-     * @param isTest
-     *            Is a test or not (flag coming from the UI)
-     * @param userId
-     *            The user ID coming from the UI
-     * @param isInsertTestEvent
-     *            Is a test or not (flag coming from the UI)
-     * @param eventAction
-     *            The latest event action in database (like CREATE, SUBMIT, ...)
+     *
+     * @param actionCommand       The action coming from the Clamp UI (like SUBMIT, UPDATE,
+     *                            DELETE, ...)
+     * @param modelProperties     The Model properties created based on the BPMN Json and
+     *                            Properties Json
+     * @param modelBpmnProperties The Json with all the properties describing the flow
+     * @param modelName           The model name
+     * @param controlName         The control loop name
+     * @param docText             The Global properties JSON containing YAML (coming from CLamp
+     *                            template)
+     * @param isTest              Is a test or not (flag coming from the UI)
+     * @param userId              The user ID coming from the UI
+     * @param isInsertTestEvent   Is a test or not (flag coming from the UI)
+     * @param eventAction         The latest event action in database (like CREATE, SUBMIT, ...)
      * @return A string containing the result of the Camel flow execution
      */
     String executeAction(@ExchangeProperty("actionCd") String actionCommand,
-            @ExchangeProperty("modelProp") String modelProperties,
-            @ExchangeProperty("modelBpmnProp") String modelBpmnProperties,
-            @ExchangeProperty("modelName") String modelName, @ExchangeProperty("controlName") String controlName,
-            @ExchangeProperty("docText") String docText, @ExchangeProperty("isTest") boolean isTest,
-            @ExchangeProperty("userid") String userId, @ExchangeProperty("isInsertTestEvent") boolean isInsertTestEvent,
-            @ExchangeProperty("eventAction") String eventAction);
+                         @ExchangeProperty("modelProp") String modelProperties,
+                         @ExchangeProperty("modelBpmnProp") String modelBpmnProperties,
+                         @ExchangeProperty("modelName") String modelName, @ExchangeProperty("controlName") String controlName,
+                         @ExchangeProperty("docText") String docText, @ExchangeProperty("isTest") boolean isTest,
+                         @ExchangeProperty("userid") String userId, @ExchangeProperty("isInsertTestEvent") boolean isInsertTestEvent,
+                         @ExchangeProperty("eventAction") String eventAction);
 }
diff --git a/src/main/java/org/onap/clamp/clds/client/DcaeDispatcherServices.java b/src/main/java/org/onap/clamp/clds/client/DcaeDispatcherServices.java
index f7aff0eff..83401a3c4 100644
--- a/src/main/java/org/onap/clamp/clds/client/DcaeDispatcherServices.java
+++ b/src/main/java/org/onap/clamp/clds/client/DcaeDispatcherServices.java
@@ -1,218 +1,216 @@
-/*-

- * ============LICENSE_START=======================================================

- * ONAP CLAMP

- * ================================================================================

- * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights

- *                             reserved.

- * ================================================================================

- * Modifications Copyright (c) 2019 Samsung

- * ================================================================================

- * 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.clamp.clds.client;

-

-import com.att.eelf.configuration.EELFLogger;

-import com.att.eelf.configuration.EELFManager;

-

-import com.google.gson.JsonObject;

-import java.io.IOException;

-import java.util.Date;

-

-import org.json.simple.JSONObject;

-import org.json.simple.parser.JSONParser;

-import org.json.simple.parser.ParseException;

-import org.onap.clamp.clds.config.ClampProperties;

-import org.onap.clamp.clds.exception.dcae.DcaeDeploymentException;

-import org.onap.clamp.clds.util.LoggingUtils;

-import org.onap.clamp.util.HttpConnectionManager;

-import org.springframework.beans.factory.annotation.Autowired;

-import org.springframework.stereotype.Component;

-

-/**

- * This class implements the communication with DCAE for the service

- * deployments.

- */

-@Component

-public class DcaeDispatcherServices {

-

-    protected static final EELFLogger logger = EELFManager.getInstance().getLogger(DcaeDispatcherServices.class);

-    protected static final EELFLogger metricsLogger = EELFManager.getInstance().getMetricsLogger();

-    private final ClampProperties refProp;

-    private final HttpConnectionManager dcaeHttpConnectionManager;

-    private static final String STATUS_URL_LOG = "Status URL extracted: ";

-    private static final String DCAE_URL_PREFIX = "/dcae-deployments/";

-    private static final String DCAE_URL_PROPERTY_NAME = "dcae.dispatcher.url";

-    private static final String DCAE_LINK_FIELD = "links";

-    private static final String DCAE_STATUS_FIELD = "status";

-

-    @Autowired

-    public DcaeDispatcherServices(ClampProperties refProp, HttpConnectionManager dcaeHttpConnectionManager) {

-        this.refProp = refProp;

-        this.dcaeHttpConnectionManager = dcaeHttpConnectionManager;

-    }

-

-    /**

-     * Get the Operation Status from a specified URL with retry.

-     * @param operationStatusUrl

-     *        The URL of the DCAE

-     * @return The status

-     * @throws InterruptedException Exception during the retry

-     */

-    public String getOperationStatusWithRetry(String operationStatusUrl) throws InterruptedException {

-        String operationStatus = "";

-        for (int i = 0; i < Integer.valueOf(refProp.getStringValue("dcae.dispatcher.retry.limit")); i++) {

-            logger.info("Trying to get Operation status on DCAE for url:" + operationStatusUrl);

-            operationStatus = getOperationStatus(operationStatusUrl);

-            logger.info("Current Status is:" + operationStatus);

-            if (!"processing".equalsIgnoreCase(operationStatus)) {

-                return operationStatus;

-            } else {

-                Thread.sleep(Integer.valueOf(refProp.getStringValue("dcae.dispatcher.retry.interval")));

-            }

-        }

-        logger.warn("Number of attempts on DCAE is over, stopping the getOperationStatus method");

-        return operationStatus;

-    }

-

-    /**

-     * Get the Operation Status from a specified URL.

-     * @param statusUrl

-     *        The URL provided by a previous DCAE Query

-     * @return The status

-     */

-    public String getOperationStatus(String statusUrl) {

-        // Assigning processing status to monitor operation status further

-        String opStatus = "processing";

-        Date startTime = new Date();

-        LoggingUtils.setTargetContext("DCAE", "getOperationStatus");

-        try {

-            String responseStr = dcaeHttpConnectionManager.doHttpRequest(statusUrl, "GET", null,

-                                                                         null, "DCAE", null,

-                                                                         null);

-            JSONObject jsonObj = parseResponse(responseStr);

-            String operationType = (String) jsonObj.get("operationType");

-            String status = (String) jsonObj.get(DCAE_STATUS_FIELD);

-            logger.info("Operation Type - " + operationType + ", Status " + status);

-            LoggingUtils.setResponseContext("0", "Get operation status success", this.getClass().getName());

-            opStatus = status;

-        } catch (Exception e) {

-            LoggingUtils.setResponseContext("900", "Get operation status failed", this.getClass().getName());

-            LoggingUtils.setErrorContext("900", "Get operation status error");

-            logger.error("Exception occurred during getOperationStatus Operation with DCAE", e);

-        } finally {

-            LoggingUtils.setTimeContext(startTime, new Date());

-            metricsLogger.info("getOperationStatus complete");

-        }

-        return opStatus;

-    }

-

-    /**

-     * Returns status URL for createNewDeployment operation.

-     * @param deploymentId

-     *        The deployment ID

-     * @param serviceTypeId

-     *        Service type ID

-     * @param blueprintInputJson

-     *        The value for each blueprint parameters in a flat JSON

-     * @return The status URL

-     */

-    public String createNewDeployment(String deploymentId, String serviceTypeId, JsonObject blueprintInputJson) {

-        Date startTime = new Date();

-        LoggingUtils.setTargetContext("DCAE", "createNewDeployment");

-        try {

-            JsonObject rootObject = refProp.getJsonTemplate("dcae.deployment.template").getAsJsonObject();

-            rootObject.addProperty("serviceTypeId", serviceTypeId);

-            if (blueprintInputJson != null) {

-                rootObject.add("inputs", blueprintInputJson);

-            }

-            String apiBodyString = rootObject.toString();

-            logger.info("Dcae api Body String - " + apiBodyString);

-            String url = refProp.getStringValue(DCAE_URL_PROPERTY_NAME) + DCAE_URL_PREFIX + deploymentId;

-            String statusUrl = getDcaeResponse(url, "PUT", apiBodyString, "application/json", DCAE_LINK_FIELD,

-                DCAE_STATUS_FIELD);

-            LoggingUtils.setResponseContext("0", "Create new deployment failed", this.getClass().getName());

-            return statusUrl;

-        } catch (Exception e) {

-            LoggingUtils.setResponseContext("900", "Create new deployment failed", this.getClass().getName());

-            LoggingUtils.setErrorContext("900", "Create new deployment error");

-            logger.error("Exception occurred during createNewDeployment Operation with DCAE", e);

-            throw new DcaeDeploymentException("Exception occurred during createNewDeployment Operation with DCAE", e);

-        } finally {

-            LoggingUtils.setTimeContext(startTime, new Date());

-            metricsLogger.info("createNewDeployment complete");

-        }

-    }

-

-    /***

-     * Returns status URL for deleteExistingDeployment operation.

-     *

-     * @param deploymentId

-     *        The deployment ID

-     * @param serviceTypeId

-     *        The service Type ID

-     * @return The status URL

-     */

-    public String deleteExistingDeployment(String deploymentId, String serviceTypeId) {

-        Date startTime = new Date();

-        LoggingUtils.setTargetContext("DCAE", "deleteExistingDeployment");

-        try {

-            String apiBodyString = "{\"serviceTypeId\": \"" + serviceTypeId + "\"}";

-            logger.info("Dcae api Body String - " + apiBodyString);

-            String url = refProp.getStringValue(DCAE_URL_PROPERTY_NAME) + DCAE_URL_PREFIX + deploymentId;

-            String statusUrl = getDcaeResponse(url, "DELETE", apiBodyString, "application/json", DCAE_LINK_FIELD,

-                DCAE_STATUS_FIELD);

-            LoggingUtils.setResponseContext("0", "Delete existing deployment success", this.getClass().getName());

-            return statusUrl;

-

-        } catch (Exception e) {

-            LoggingUtils.setResponseContext("900", "Delete existing deployment failed", this.getClass().getName());

-            LoggingUtils.setErrorContext("900", "Delete existing deployment error");

-            logger.error("Exception occurred during deleteExistingDeployment Operation with DCAE", e);

-            throw new DcaeDeploymentException("Exception occurred during deleteExistingDeployment Operation with DCAE",

-                e);

-        } finally {

-            LoggingUtils.setTimeContext(startTime, new Date());

-            metricsLogger.info("deleteExistingDeployment complete");

-        }

-    }

-

-    private String getDcaeResponse(String url, String requestMethod, String payload, String contentType, String node,

-        String nodeAttr) throws IOException, ParseException {

-        Date startTime = new Date();

-        try {

-            String responseStr = dcaeHttpConnectionManager.doHttpRequest(url, requestMethod, payload, contentType, "DCAE", null, null);

-            JSONObject jsonObj = parseResponse(responseStr);

-            JSONObject linksObj = (JSONObject) jsonObj.get(node);

-            String statusUrl = (String) linksObj.get(nodeAttr);

-            logger.info(STATUS_URL_LOG + statusUrl);

-            return statusUrl;

-        } catch (IOException | ParseException e) {

-            logger.error("Exception occurred getting response from DCAE", e);

-            throw e;

-        } finally {

-            LoggingUtils.setTimeContext(startTime, new Date());

-            metricsLogger.info("getDcaeResponse complete");

-        }

-    }

-

-    private JSONObject parseResponse(String responseStr) throws ParseException {

-        JSONParser parser = new JSONParser();

-        Object obj0 = parser.parse(responseStr);

-        JSONObject jsonObj = (JSONObject) obj0;

-        return jsonObj;

-    }

+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP CLAMP
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights
+ *                             reserved.
+ * ================================================================================
+ * Modifications Copyright (c) 2019 Samsung
+ * ================================================================================
+ * 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.clamp.clds.client;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+
+import com.google.gson.JsonObject;
+import java.io.IOException;
+import java.util.Date;
+
+import org.json.simple.JSONObject;
+import org.json.simple.parser.JSONParser;
+import org.json.simple.parser.ParseException;
+import org.onap.clamp.clds.config.ClampProperties;
+import org.onap.clamp.clds.exception.dcae.DcaeDeploymentException;
+import org.onap.clamp.clds.util.LoggingUtils;
+import org.onap.clamp.util.HttpConnectionManager;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+/**
+ * This class implements the communication with DCAE for the service
+ * deployments.
+ */
+@Component
+public class DcaeDispatcherServices {
+
+    protected static final EELFLogger logger = EELFManager.getInstance().getLogger(DcaeDispatcherServices.class);
+    protected static final EELFLogger metricsLogger = EELFManager.getInstance().getMetricsLogger();
+    private final ClampProperties refProp;
+    private final HttpConnectionManager dcaeHttpConnectionManager;
+    private static final String STATUS_URL_LOG = "Status URL extracted: ";
+    private static final String DCAE_URL_PREFIX = "/dcae-deployments/";
+    private static final String DCAE_URL_PROPERTY_NAME = "dcae.dispatcher.url";
+    private static final String DCAE_LINK_FIELD = "links";
+    private static final String DCAE_STATUS_FIELD = "status";
+
+    @Autowired
+    public DcaeDispatcherServices(ClampProperties refProp, HttpConnectionManager dcaeHttpConnectionManager) {
+        this.refProp = refProp;
+        this.dcaeHttpConnectionManager = dcaeHttpConnectionManager;
+    }
+
+    /**
+     * Get the Operation Status from a specified URL with retry.
+     * @param operationStatusUrl
+     *        The URL of the DCAE
+     * @return The status
+     * @throws InterruptedException Exception during the retry
+     */
+    public String getOperationStatusWithRetry(String operationStatusUrl) throws InterruptedException {
+        String operationStatus = "";
+        for (int i = 0; i < Integer.valueOf(refProp.getStringValue("dcae.dispatcher.retry.limit")); i++) {
+            logger.info("Trying to get Operation status on DCAE for url:" + operationStatusUrl);
+            operationStatus = getOperationStatus(operationStatusUrl);
+            logger.info("Current Status is:" + operationStatus);
+            if (!"processing".equalsIgnoreCase(operationStatus)) {
+                return operationStatus;
+            } else {
+                Thread.sleep(Integer.valueOf(refProp.getStringValue("dcae.dispatcher.retry.interval")));
+            }
+        }
+        logger.warn("Number of attempts on DCAE is over, stopping the getOperationStatus method");
+        return operationStatus;
+    }
+
+    /**
+     * Get the Operation Status from a specified URL.
+     * @param statusUrl
+     *        The URL provided by a previous DCAE Query
+     * @return The status
+     */
+    public String getOperationStatus(String statusUrl) {
+        // Assigning processing status to monitor operation status further
+        String opStatus = "processing";
+        Date startTime = new Date();
+        LoggingUtils.setTargetContext("DCAE", "getOperationStatus");
+        try {
+            String responseStr = dcaeHttpConnectionManager.doHttpRequest(statusUrl, "GET", null,
+                                                                         null, "DCAE", null,
+                                                                         null);
+            JSONObject jsonObj = parseResponse(responseStr);
+            String operationType = (String) jsonObj.get("operationType");
+            String status = (String) jsonObj.get(DCAE_STATUS_FIELD);
+            logger.info("Operation Type - " + operationType + ", Status " + status);
+            LoggingUtils.setResponseContext("0", "Get operation status success", this.getClass().getName());
+            opStatus = status;
+        } catch (Exception e) {
+            LoggingUtils.setResponseContext("900", "Get operation status failed", this.getClass().getName());
+            LoggingUtils.setErrorContext("900", "Get operation status error");
+            logger.error("Exception occurred during getOperationStatus Operation with DCAE", e);
+        } finally {
+            LoggingUtils.setTimeContext(startTime, new Date());
+            metricsLogger.info("getOperationStatus complete");
+        }
+        return opStatus;
+    }
+
+    /**
+     * Returns status URL for createNewDeployment operation.
+     * @param deploymentId
+     *        The deployment ID
+     * @param serviceTypeId
+     *        Service type ID
+     * @param blueprintInputJson
+     *        The value for each blueprint parameters in a flat JSON
+     * @return The status URL
+     */
+    public String createNewDeployment(String deploymentId, String serviceTypeId, JsonObject blueprintInputJson) {
+        Date startTime = new Date();
+        LoggingUtils.setTargetContext("DCAE", "createNewDeployment");
+        try {
+            JsonObject rootObject = refProp.getJsonTemplate("dcae.deployment.template").getAsJsonObject();
+            rootObject.addProperty("serviceTypeId", serviceTypeId);
+            if (blueprintInputJson != null) {
+                rootObject.add("inputs", blueprintInputJson);
+            }
+            String apiBodyString = rootObject.toString();
+            logger.info("Dcae api Body String - " + apiBodyString);
+            String url = refProp.getStringValue(DCAE_URL_PROPERTY_NAME) + DCAE_URL_PREFIX + deploymentId;
+            String statusUrl = getDcaeResponse(url, "PUT", apiBodyString, "application/json", DCAE_LINK_FIELD,
+                DCAE_STATUS_FIELD);
+            LoggingUtils.setResponseContext("0", "Create new deployment failed", this.getClass().getName());
+            return statusUrl;
+        } catch (Exception e) {
+            LoggingUtils.setResponseContext("900", "Create new deployment failed", this.getClass().getName());
+            LoggingUtils.setErrorContext("900", "Create new deployment error");
+            logger.error("Exception occurred during createNewDeployment Operation with DCAE", e);
+            throw new DcaeDeploymentException("Exception occurred during createNewDeployment Operation with DCAE", e);
+        } finally {
+            LoggingUtils.setTimeContext(startTime, new Date());
+            metricsLogger.info("createNewDeployment complete");
+        }
+    }
+
+    /***
+     * Returns status URL for deleteExistingDeployment operation.
+     *
+     * @param deploymentId
+     *        The deployment ID
+     * @param serviceTypeId
+     *        The service Type ID
+     * @return The status URL
+     */
+    public String deleteExistingDeployment(String deploymentId, String serviceTypeId) {
+        Date startTime = new Date();
+        LoggingUtils.setTargetContext("DCAE", "deleteExistingDeployment");
+        try {
+            String apiBodyString = "{\"serviceTypeId\": \"" + serviceTypeId + "\"}";
+            logger.info("Dcae api Body String - " + apiBodyString);
+            String url = refProp.getStringValue(DCAE_URL_PROPERTY_NAME) + DCAE_URL_PREFIX + deploymentId;
+            String statusUrl = getDcaeResponse(url, "DELETE", apiBodyString, "application/json", DCAE_LINK_FIELD,
+                DCAE_STATUS_FIELD);
+            LoggingUtils.setResponseContext("0", "Delete existing deployment success", this.getClass().getName());
+            return statusUrl;
+
+        } catch (Exception e) {
+            LoggingUtils.setResponseContext("900", "Delete existing deployment failed", this.getClass().getName());
+            LoggingUtils.setErrorContext("900", "Delete existing deployment error");
+            logger.error("Exception occurred during deleteExistingDeployment Operation with DCAE", e);
+            throw new DcaeDeploymentException("Exception occurred during deleteExistingDeployment Operation with DCAE",
+                e);
+        } finally {
+            LoggingUtils.setTimeContext(startTime, new Date());
+            metricsLogger.info("deleteExistingDeployment complete");
+        }
+    }
+
+    private String getDcaeResponse(String url, String requestMethod, String payload, String contentType, String node,
+        String nodeAttr) throws IOException, ParseException {
+        Date startTime = new Date();
+        try {
+            String responseStr = dcaeHttpConnectionManager.doHttpRequest(url, requestMethod, payload, contentType, "DCAE", null, null);
+            JSONObject jsonObj = parseResponse(responseStr);
+            JSONObject linksObj = (JSONObject) jsonObj.get(node);
+            String statusUrl = (String) linksObj.get(nodeAttr);
+            logger.info(STATUS_URL_LOG + statusUrl);
+            return statusUrl;
+        } catch (IOException | ParseException e) {
+            logger.error("Exception occurred getting response from DCAE", e);
+            throw e;
+        } finally {
+            LoggingUtils.setTimeContext(startTime, new Date());
+            metricsLogger.info("getDcaeResponse complete");
+        }
+    }
+
+    private JSONObject parseResponse(String responseStr) throws ParseException {
+        JSONParser parser = new JSONParser();
+        return (JSONObject) parser.parse(responseStr);
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/org/onap/clamp/clds/client/req/policy/PolicyClient.java b/src/main/java/org/onap/clamp/clds/client/req/policy/PolicyClient.java
index 43209b299..68d8529ce 100644
--- a/src/main/java/org/onap/clamp/clds/client/req/policy/PolicyClient.java
+++ b/src/main/java/org/onap/clamp/clds/client/req/policy/PolicyClient.java
@@ -65,7 +65,6 @@ import org.onap.policy.api.PolicyType;
 import org.onap.policy.api.PushPolicyParameters;
 import org.onap.policy.api.RuleProvider;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.context.ApplicationContext;
 import org.springframework.context.annotation.Primary;
 import org.springframework.stereotype.Component;
 
@@ -76,22 +75,23 @@ import org.springframework.stereotype.Component;
 @Primary
 public class PolicyClient {
 
-    protected PolicyEngine policyEngine;
-    protected static final String LOG_POLICY_PREFIX = "Response is ";
-    protected static final EELFLogger logger = EELFManager.getInstance().getLogger(PolicyClient.class);
-    protected static final EELFLogger metricsLogger = EELFManager.getInstance().getMetricsLogger();
-    public static final String POLICY_MSTYPE_PROPERTY_NAME = "policy.ms.type";
-    public static final String POLICY_ONAPNAME_PROPERTY_NAME = "policy.onap.name";
-    public static final String POLICY_BASENAME_PREFIX_PROPERTY_NAME = "policy.base.policyNamePrefix";
-    public static final String POLICY_OP_NAME_PREFIX_PROPERTY_NAME = "policy.op.policyNamePrefix";
+    private PolicyEngine policyEngine;
+    private static final String LOG_POLICY_PREFIX = "Response is ";
+    private static final EELFLogger logger = EELFManager.getInstance().getLogger(PolicyClient.class);
+    private static final EELFLogger metricsLogger = EELFManager.getInstance().getMetricsLogger();
+    private static final String POLICY_MSTYPE_PROPERTY_NAME = "policy.ms.type";
+    private static final String POLICY_ONAPNAME_PROPERTY_NAME = "policy.onap.name";
+    private static final String POLICY_BASENAME_PREFIX_PROPERTY_NAME = "policy.base.policyNamePrefix";
+    private static final String POLICY_OP_NAME_PREFIX_PROPERTY_NAME = "policy.op.policyNamePrefix";
     public static final String POLICY_MS_NAME_PREFIX_PROPERTY_NAME = "policy.ms.policyNamePrefix";
-    public static final String POLICY_OP_TYPE_PROPERTY_NAME = "policy.op.type";
-    public static final String TOSCA_FILE_TEMP_PATH = "tosca.filePath";
+    private static final String POLICY_OP_TYPE_PROPERTY_NAME = "policy.op.type";
+    private static final String TOSCA_FILE_TEMP_PATH = "tosca.filePath";
+    private static final String POLICY_COMMUNICATION_LOG_MESSAGE = "Exception occurred during policy communication";
+    private static final String POLICY_COMMUNICATION_EXC_MESSAGE = "Exception while communicating with Policy";
+    private static final String POLICY = "Policy";
 
     @Autowired
-    protected ApplicationContext appContext;
-    @Autowired
-    protected ClampProperties refProp;
+    private ClampProperties refProp;
     @Autowired
     private PolicyConfiguration policyConfiguration;
 
@@ -274,12 +274,12 @@ public class PolicyClient {
             if ((PolicyClass.Decision.equals(policyParameters.getPolicyClass()) && !checkDecisionPolicyExists(prop))
                 || (PolicyClass.Config.equals(policyParameters.getPolicyClass())
                     && !checkPolicyExists(prop, policyPrefix, policyNameWithPrefix))) {
-                LoggingUtils.setTargetContext("Policy", "createPolicy");
+                LoggingUtils.setTargetContext(POLICY, "createPolicy");
                 logger.info("Attempting to create policy for action=" + prop.getActionCd());
                 response = getPolicyEngine().createPolicy(policyParameters);
                 responseMessage = response.getResponseMessage();
             } else {
-                LoggingUtils.setTargetContext("Policy", "updatePolicy");
+                LoggingUtils.setTargetContext(POLICY, "updatePolicy");
                 logger.info("Attempting to update policy for action=" + prop.getActionCd());
                 response = getPolicyEngine().updatePolicy(policyParameters);
                 responseMessage = response.getResponseMessage();
@@ -287,8 +287,8 @@ public class PolicyClient {
         } catch (Exception e) {
             LoggingUtils.setResponseContext("900", "Policy send failed", this.getClass().getName());
             LoggingUtils.setErrorContext("900", "Policy send error");
-            logger.error("Exception occurred during policy communication", e);
-            throw new PolicyClientException("Exception while communicating with Policy", e);
+            logger.error(POLICY_COMMUNICATION_LOG_MESSAGE, e);
+            throw new PolicyClientException(POLICY_COMMUNICATION_EXC_MESSAGE, e);
         }
         logger.info(LOG_POLICY_PREFIX + responseMessage);
         LoggingUtils.setTimeContext(startTime, new Date());
@@ -329,7 +329,7 @@ public class PolicyClient {
         PolicyChangeResponse response;
         String responseMessage = "";
         try {
-            LoggingUtils.setTargetContext("Policy", "pushPolicy");
+            LoggingUtils.setTargetContext(POLICY, "pushPolicy");
             logger.info("Attempting to push policy...");
             response = getPolicyEngine().pushPolicy(pushPolicyParameters);
             if (response != null) {
@@ -338,8 +338,8 @@ public class PolicyClient {
         } catch (Exception e) {
             LoggingUtils.setResponseContext("900", "Policy push failed", this.getClass().getName());
             LoggingUtils.setErrorContext("900", "Policy push error");
-            logger.error("Exception occurred during policy communication", e);
-            throw new PolicyClientException("Exception while communicating with Policy", e);
+            logger.error(POLICY_COMMUNICATION_LOG_MESSAGE, e);
+            throw new PolicyClientException(POLICY_COMMUNICATION_EXC_MESSAGE, e);
         }
         logger.info(LOG_POLICY_PREFIX + responseMessage);
         if (response != null && (response.getResponseCode() == 200 || response.getResponseCode() == 204)) {
@@ -466,8 +466,8 @@ public class PolicyClient {
                 deletePolicyResponse = deletePolicy(prop, DictionaryType.Decision.toString(), null);
             }
         } catch (Exception e) {
-            logger.error("Exception occurred during policy communication", e);
-            throw new PolicyClientException("Exception while communicating with Policy", e);
+            logger.error(POLICY_COMMUNICATION_LOG_MESSAGE, e);
+            throw new PolicyClientException(POLICY_COMMUNICATION_EXC_MESSAGE, e);
         }
         return deletePolicyResponse;
     }
@@ -492,8 +492,8 @@ public class PolicyClient {
                 deletePolicyResponse = deletePolicy(prop, policyType, null);
             }
         } catch (Exception e) {
-            logger.error("Exception occurred during policy communication", e);
-            throw new PolicyClientException("Exception while communicating with Policy", e);
+            logger.error(POLICY_COMMUNICATION_LOG_MESSAGE, e);
+            throw new PolicyClientException(POLICY_COMMUNICATION_EXC_MESSAGE, e);
         }
         return deletePolicyResponse;
     }
@@ -650,8 +650,8 @@ public class PolicyClient {
         } catch (Exception e) {
             LoggingUtils.setResponseContext("900", "Policy Model import failed", this.getClass().getName());
             LoggingUtils.setErrorContext("900", "Policy Model import error");
-            logger.error("Exception occurred during policy communication", e);
-            throw new PolicyClientException("Exception while communicating with Policy", e);
+            logger.error(POLICY_COMMUNICATION_LOG_MESSAGE, e);
+            throw new PolicyClientException(POLICY_COMMUNICATION_EXC_MESSAGE, e);
         }
         logger.info(LOG_POLICY_PREFIX + responseMessage);
         if (response != null && (response.getResponseCode() == 200 || response.getResponseCode() == 204)) {