Merge "pnf sw upgrade csit"

11 files changed, 2013 insertions, 0 deletions

diff --git a/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/AaiSimulatorController.java b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/AaiSimulatorController.java
new file mode 100755
index 00000000..f5912908
--- /dev/null
+++ b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/AaiSimulatorController.java
@@ -0,0 +1,51 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  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.
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.aaisimulator.controller;
+
+import static org.onap.so.aaisimulator.utils.Constants.HEALTHY;
+import javax.ws.rs.core.MediaType;
+import org.onap.so.aaisimulator.utils.Constants;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+/**
+ * @author waqas.ikram@ericsson.com
+ *
+ */
+@Controller
+@RequestMapping(path = Constants.BASE_URL)
+public class AaiSimulatorController {
+    private static final Logger LOGGER = LoggerFactory.getLogger(AaiSimulatorController.class);
+
+    @ResponseBody
+    @GetMapping(value = "/healthcheck", produces = MediaType.TEXT_PLAIN)
+    @ResponseStatus(code = HttpStatus.OK)
+    public String healthCheck() {
+        LOGGER.info("Running health check ...");
+        return HEALTHY;
+    }
+
+}
diff --git a/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/BusinessController.java b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/BusinessController.java
new file mode 100755
index 00000000..4a0ed1b9
--- /dev/null
+++ b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/BusinessController.java
@@ -0,0 +1,356 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.aaisimulator.controller;
+
+import static org.onap.so.aaisimulator.utils.Constants.BI_DIRECTIONAL_RELATIONSHIP_LIST_URL;
+import static org.onap.so.aaisimulator.utils.Constants.CUSTOMER_TYPE;
+import static org.onap.so.aaisimulator.utils.Constants.CUSTOMER_URL;
+import static org.onap.so.aaisimulator.utils.Constants.GENERIC_VNF;
+import static org.onap.so.aaisimulator.utils.Constants.GENERIC_VNF_VNF_ID;
+import static org.onap.so.aaisimulator.utils.Constants.SERVICE_RESOURCE_TYPE;
+import static org.onap.so.aaisimulator.utils.Constants.SERVICE_SUBSCRIPTION;
+import static org.onap.so.aaisimulator.utils.Constants.X_HTTP_METHOD_OVERRIDE;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getRequestErrorResponseEntity;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getResourceVersion;
+import java.util.Optional;
+import javax.servlet.http.HttpServletRequest;
+import javax.ws.rs.core.MediaType;
+import org.onap.aai.domain.yang.Customer;
+import org.onap.aai.domain.yang.GenericVnf;
+import org.onap.aai.domain.yang.GenericVnfs;
+import org.onap.aai.domain.yang.Relationship;
+import org.onap.aai.domain.yang.RelationshipData;
+import org.onap.aai.domain.yang.ServiceInstance;
+import org.onap.aai.domain.yang.ServiceInstances;
+import org.onap.aai.domain.yang.ServiceSubscription;
+import org.onap.so.aaisimulator.models.NodeServiceInstance;
+import org.onap.so.aaisimulator.service.providers.CustomerCacheServiceProvider;
+import org.onap.so.aaisimulator.service.providers.GenericVnfCacheServiceProvider;
+import org.onap.so.aaisimulator.service.providers.NodesCacheServiceProvider;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+/**
+ * @author waqas.ikram@ericsson.com
+ *
+ */
+@Controller
+@RequestMapping(path = CUSTOMER_URL)
+public class BusinessController {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(BusinessController.class);
+    private final CustomerCacheServiceProvider cacheServiceProvider;
+    private final NodesCacheServiceProvider nodesCacheServiceProvider;
+    private final GenericVnfCacheServiceProvider genericVnfCacheServiceProvider;
+
+    @Autowired
+    public BusinessController(final CustomerCacheServiceProvider cacheServiceProvider,
+            final NodesCacheServiceProvider nodesCacheServiceProvider,
+            final GenericVnfCacheServiceProvider genericVnfCacheServiceProvider) {
+        this.cacheServiceProvider = cacheServiceProvider;
+        this.nodesCacheServiceProvider = nodesCacheServiceProvider;
+        this.genericVnfCacheServiceProvider = genericVnfCacheServiceProvider;
+    }
+
+    @GetMapping(value = "{global-customer-id}", produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getCustomer(@PathVariable("global-customer-id") final String globalCustomerId,
+            final HttpServletRequest request) {
+        LOGGER.info("Will retrieve customer for 'global customer id': {} ...", globalCustomerId);
+
+        final Optional<Customer> optional = cacheServiceProvider.getCustomer(globalCustomerId);
+        if (optional.isPresent()) {
+            final Customer customer = optional.get();
+            LOGGER.info("found customer {} in cache", customer);
+            return ResponseEntity.ok(customer);
+        }
+
+        LOGGER.error("Couldn't find {} in cache", globalCustomerId);
+        return getRequestErrorResponseEntity(request, CUSTOMER_TYPE);
+    }
+
+    @PutMapping(value = "/{global-customer-id}", consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putCustomer(@RequestBody final Customer customer,
+            @PathVariable("global-customer-id") final String globalCustomerId, final HttpServletRequest request) {
+        LOGGER.info("Will put customer for 'global customer id': {} ...", globalCustomerId);
+
+        if (customer.getResourceVersion() == null || customer.getResourceVersion().isEmpty()) {
+            customer.setResourceVersion(getResourceVersion());
+
+        }
+        cacheServiceProvider.putCustomer(globalCustomerId, customer);
+        return ResponseEntity.accepted().build();
+
+    }
+
+    @GetMapping(value = "/{global-customer-id}/service-subscriptions/service-subscription/{service-type}",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getCustomer(@PathVariable("global-customer-id") final String globalCustomerId,
+            @PathVariable("service-type") final String serviceType, final HttpServletRequest request) {
+        LOGGER.info("Will retrieve service subscription for 'global customer id': {} and 'service type': {} ...",
+                globalCustomerId, serviceType);
+
+        final Optional<ServiceSubscription> optional =
+                cacheServiceProvider.getServiceSubscription(globalCustomerId, serviceType);
+        if (optional.isPresent()) {
+            final ServiceSubscription serviceSubscription = optional.get();
+            LOGGER.info("found service subscription  {} in cache", serviceSubscription);
+            return ResponseEntity.ok(serviceSubscription);
+        }
+
+        LOGGER.error("Couldn't find 'global customer id': {} and 'service type': {} in cache", globalCustomerId,
+                serviceType);
+        return getRequestErrorResponseEntity(request, SERVICE_SUBSCRIPTION);
+    }
+
+    @PutMapping(value = "/{global-customer-id}/service-subscriptions/service-subscription/{service-type}",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putServiceSubscription(@PathVariable("global-customer-id") final String globalCustomerId,
+            @PathVariable("service-type") final String serviceType,
+            @RequestBody final ServiceSubscription serviceSubscription, final HttpServletRequest request) {
+        LOGGER.info("Will add service subscription for 'global customer id': {} and 'service type': {} ...",
+                globalCustomerId, serviceType);
+
+        if (cacheServiceProvider.putServiceSubscription(globalCustomerId, serviceType, serviceSubscription)) {
+            LOGGER.info("Successfully add service subscription in cache ...");
+            return ResponseEntity.accepted().build();
+        }
+
+        LOGGER.error("Couldn't add service subscription using 'global customer id': {} and 'service type': {}",
+                globalCustomerId, serviceType);
+        return getRequestErrorResponseEntity(request, SERVICE_SUBSCRIPTION);
+    }
+
+    @GetMapping(
+            value = "/{global-customer-id}/service-subscriptions/service-subscription/{service-type}/service-instances",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getSericeInstances(@PathVariable("global-customer-id") final String globalCustomerId,
+            @PathVariable("service-type") final String serviceType,
+            @RequestParam(name = "service-instance-name") final String serviceInstanceName,
+            @RequestParam(name = "depth", required = false) final Integer depth, final HttpServletRequest request) {
+
+        LOGGER.info(
+                "Will retrieve service instances for 'global customer id': {}, 'service type': {} and 'service instance name: '{} with depth: {}...",
+                globalCustomerId, serviceType, serviceInstanceName, depth);
+
+        final Optional<ServiceInstances> optional =
+                cacheServiceProvider.getServiceInstances(globalCustomerId, serviceType, serviceInstanceName);
+        if (optional.isPresent()) {
+            final ServiceInstances serviceInstances = optional.get();
+            LOGGER.info("found service instance  {} in cache", serviceInstances);
+            return ResponseEntity.ok(serviceInstances);
+        }
+        LOGGER.error(
+                "Couldn't find 'global customer id': {}, 'service type': {} and 'service instance name': {} with depth: {} in cache",
+                globalCustomerId, serviceType, serviceInstanceName, depth);
+        return getRequestErrorResponseEntity(request);
+    }
+
+    @GetMapping(
+            value = "/{global-customer-id}/service-subscriptions/service-subscription/{service-type}/service-instances/service-instance/{service-instance-id}",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getSericeInstance(@PathVariable("global-customer-id") final String globalCustomerId,
+            @PathVariable("service-type") final String serviceType,
+            @PathVariable(name = "service-instance-id") final String serviceInstanceId,
+            @RequestParam(name = "depth", required = false) final Integer depth,
+            @RequestParam(name = "resultIndex", required = false) final Integer resultIndex,
+            @RequestParam(name = "resultSize", required = false) final Integer resultSize,
+            @RequestParam(name = "format", required = false) final String format, final HttpServletRequest request) {
+
+        LOGGER.info(
+                "Will retrieve service instances for 'global customer id': {}, 'service type': {} and 'service instance id: '{} with depth: {}, resultIndex:{}, resultSize: {} and format: {}...",
+                globalCustomerId, serviceType, serviceInstanceId, depth, resultIndex, resultSize, format);
+
+        final Optional<ServiceInstance> optional =
+                cacheServiceProvider.getServiceInstance(globalCustomerId, serviceType, serviceInstanceId);
+        if (optional.isPresent()) {
+            final ServiceInstance serviceInstance = optional.get();
+            LOGGER.info("found service instance  {} in cache", serviceInstance);
+            return ResponseEntity.ok(serviceInstance);
+        }
+        LOGGER.error(
+                "Couldn't find 'global customer id': {}, 'service type': {} and 'service instance id': {} with depth: {}, resultIndex:{}, resultSize: {} and format: {} in cache",
+                globalCustomerId, serviceType, serviceInstanceId, depth, resultIndex, resultSize, format);
+        return getRequestErrorResponseEntity(request);
+    }
+
+    @PutMapping(
+            value = "/{global-customer-id}/service-subscriptions/service-subscription/{service-type}/service-instances/service-instance/{service-instance-id}",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putSericeInstance(@PathVariable("global-customer-id") final String globalCustomerId,
+            @PathVariable("service-type") final String serviceType,
+            @PathVariable(name = "service-instance-id") final String serviceInstanceId,
+            @RequestHeader(value = X_HTTP_METHOD_OVERRIDE, required = false) final String invocationId,
+            @RequestBody final ServiceInstance serviceInstance, final HttpServletRequest request) {
+
+        LOGGER.info(
+                "Will add service instance for 'global customer id': {}, 'service type': {} and 'service instance id: '{} ...",
+                globalCustomerId, serviceType, serviceInstanceId);
+
+        if (serviceInstance.getResourceVersion() == null || serviceInstance.getResourceVersion().isEmpty()) {
+            serviceInstance.setResourceVersion(getResourceVersion());
+        }
+
+        if (cacheServiceProvider.putServiceInstance(globalCustomerId, serviceType, serviceInstanceId,
+                serviceInstance)) {
+            nodesCacheServiceProvider.putNodeServiceInstance(serviceInstanceId, new NodeServiceInstance(
+                    globalCustomerId, serviceType, serviceInstanceId, SERVICE_RESOURCE_TYPE, request.getRequestURI()));
+            return ResponseEntity.accepted().build();
+        }
+
+        LOGGER.error("Couldn't add 'global customer id': {}, 'service type': {} and 'service instance id': {} to cache",
+                globalCustomerId, serviceType, serviceInstanceId);
+        return getRequestErrorResponseEntity(request);
+    }
+
+    @PostMapping(
+            value = "/{global-customer-id}/service-subscriptions/service-subscription/{service-type}/service-instances/service-instance/{service-instance-id}",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> patchSericeInstance(@PathVariable("global-customer-id") final String globalCustomerId,
+            @PathVariable("service-type") final String serviceType,
+            @PathVariable(name = "service-instance-id") final String serviceInstanceId,
+            @RequestHeader(value = X_HTTP_METHOD_OVERRIDE, required = false) final String xHttpHeaderOverride,
+            @RequestBody final ServiceInstance serviceInstance, final HttpServletRequest request) {
+
+        LOGGER.info(
+                "Will post service instance for 'global customer id': {}, 'service type': {}, 'service instance id: '{} and '{}': {}...",
+                globalCustomerId, serviceType, serviceInstanceId, X_HTTP_METHOD_OVERRIDE, xHttpHeaderOverride);
+
+        if (HttpMethod.PATCH.toString().equalsIgnoreCase(xHttpHeaderOverride)) {
+            cacheServiceProvider.patchServiceInstance(globalCustomerId, serviceType, serviceInstanceId,
+                    serviceInstance);
+            return ResponseEntity.accepted().build();
+        }
+        LOGGER.error("{} not supported ... ", xHttpHeaderOverride);
+
+        return getRequestErrorResponseEntity(request);
+    }
+
+
+    @GetMapping(
+            value = "/{global-customer-id}/service-subscriptions/service-subscription/{service-type}/service-instances/service-instance/{service-instance-id}/related-to/generic-vnfs",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getRelatedToGenericVnf(@PathVariable("global-customer-id") final String globalCustomerId,
+            @PathVariable("service-type") final String serviceType,
+            @PathVariable(name = "service-instance-id") final String serviceInstanceId,
+            @RequestParam(name = "vnf-name", required = true) final String vnfName, final HttpServletRequest request) {
+
+        LOGGER.info(
+                "Will retrieve generic vnf related to information for 'global customer id': {}, 'service type': {} and 'service instance id: '{} with vnfname: {}...",
+                globalCustomerId, serviceType, serviceInstanceId, vnfName);
+
+        final Optional<Relationship> optional =
+                cacheServiceProvider.getRelationship(globalCustomerId, serviceType, serviceInstanceId, vnfName);
+
+        if (optional.isPresent()) {
+
+            final Relationship relationship = optional.get();
+            final Optional<RelationshipData> relationshipDataOptional = relationship.getRelationshipData().stream()
+                    .filter(existing -> GENERIC_VNF_VNF_ID.equals(existing.getRelationshipKey())).findFirst();
+
+            if (relationshipDataOptional.isPresent()) {
+                final RelationshipData relationshipData = relationshipDataOptional.get();
+                final String vnfId = relationshipData.getRelationshipValue();
+                final Optional<GenericVnf> genericVnfOptional = genericVnfCacheServiceProvider.getGenericVnf(vnfId);
+                if (genericVnfOptional.isPresent()) {
+                    final GenericVnfs genericVnfs = new GenericVnfs();
+                    genericVnfs.getGenericVnf().add(genericVnfOptional.get());
+                    LOGGER.info("found service instance  {} in cache", relationship);
+                    return ResponseEntity.ok(genericVnfs);
+                }
+            }
+        }
+        LOGGER.error(
+                "Couldn't find  generic vnf related to information for 'global customer id': {}, 'service type': {} and 'service instance id: '{} with vnfname: {}...",
+                globalCustomerId, serviceType, serviceInstanceId, vnfName);
+        return getRequestErrorResponseEntity(request, GENERIC_VNF);
+    }
+
+    @PutMapping(
+            value = "/{global-customer-id}/service-subscriptions/service-subscription/{service-type}/service-instances/service-instance/{service-instance-id}"
+                    + BI_DIRECTIONAL_RELATIONSHIP_LIST_URL,
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putSericeInstanceRelationShip(
+            @PathVariable("global-customer-id") final String globalCustomerId,
+            @PathVariable("service-type") final String serviceType,
+            @PathVariable(name = "service-instance-id") final String serviceInstanceId,
+            @RequestBody final Relationship relationship, final HttpServletRequest request) {
+
+        LOGGER.info(
+                "Will add {} relationship for 'global customer id': {}, 'service type': {} and 'service instance id: '{} ...",
+                relationship.getRelatedTo(), globalCustomerId, serviceType, serviceInstanceId);
+        final Optional<Relationship> optional = cacheServiceProvider.addRelationShip(globalCustomerId, serviceType,
+                serviceInstanceId, relationship, request.getRequestURI());
+
+        if (optional.isPresent()) {
+            final Relationship resultantRelationship = optional.get();
+            LOGGER.info("Relationship add, sending resultant relationship: {} in response ...", resultantRelationship);
+            return ResponseEntity.accepted().body(resultantRelationship);
+        }
+
+        LOGGER.error(
+                "Couldn't add {} relationship for 'global customer id': {}, 'service type': {} and 'service instance id: '{} ...",
+                relationship.getRelatedTo(), globalCustomerId, serviceType, serviceInstanceId);
+
+        return getRequestErrorResponseEntity(request);
+    }
+
+    @DeleteMapping(
+            value = "/{global-customer-id}/service-subscriptions/service-subscription/{service-type}/service-instances/service-instance/{service-instance-id}",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> deleteSericeInstance(@PathVariable("global-customer-id") final String globalCustomerId,
+            @PathVariable("service-type") final String serviceType,
+            @PathVariable(name = "service-instance-id") final String serviceInstanceId,
+            @RequestParam(name = "resource-version") final String resourceVersion, final HttpServletRequest request) {
+
+        LOGGER.info(
+                "Will delete SericeInstance for 'global-customer-id': {}, 'service-type': {}, 'service-instance-id': {} and 'resource-version': {}",
+                globalCustomerId, serviceType, serviceInstanceId, resourceVersion);
+
+        if (cacheServiceProvider.deleteSericeInstance(globalCustomerId, serviceType, serviceInstanceId,
+                resourceVersion)) {
+            LOGGER.info(
+                    "Successfully deleted SericeInstance from cache for 'global-customer-id': {}, 'service-type': {}, 'service-instance-id': {} and 'resource-version': {}",
+                    globalCustomerId, serviceType, serviceInstanceId, resourceVersion);
+            return ResponseEntity.noContent().build();
+        }
+
+        LOGGER.error(
+                "Unable to delete SericeInstance from cache for 'global-customer-id': {}, 'service-type': {}, 'service-instance-id': {} and 'resource-version': {}",
+                globalCustomerId, serviceType, serviceInstanceId, resourceVersion);
+
+        return getRequestErrorResponseEntity(request);
+
+    }
+}
diff --git a/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/CloudRegionsController.java b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/CloudRegionsController.java
new file mode 100755
index 00000000..8e007de3
--- /dev/null
+++ b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/CloudRegionsController.java
@@ -0,0 +1,396 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.aaisimulator.controller;
+
+import static org.onap.so.aaisimulator.utils.Constants.BI_DIRECTIONAL_RELATIONSHIP_LIST_URL;
+import static org.onap.so.aaisimulator.utils.Constants.CLOUD_REGION;
+import static org.onap.so.aaisimulator.utils.Constants.CLOUD_REGIONS;
+import static org.onap.so.aaisimulator.utils.Constants.ESR_SYSTEM_INFO_LIST;
+import static org.onap.so.aaisimulator.utils.Constants.RELATIONSHIP_LIST_RELATIONSHIP_URL;
+import static org.onap.so.aaisimulator.utils.Constants.VSERVER;
+import static org.onap.so.aaisimulator.utils.HttpServiceUtils.getHeaders;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getRequestErrorResponseEntity;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getResourceVersion;
+import java.util.Optional;
+import javax.servlet.http.HttpServletRequest;
+import javax.ws.rs.core.MediaType;
+import org.onap.aai.domain.yang.CloudRegion;
+import org.onap.aai.domain.yang.EsrSystemInfo;
+import org.onap.aai.domain.yang.EsrSystemInfoList;
+import org.onap.aai.domain.yang.Relationship;
+import org.onap.aai.domain.yang.Tenant;
+import org.onap.aai.domain.yang.Vserver;
+import org.onap.so.aaisimulator.models.CloudRegionKey;
+import org.onap.so.aaisimulator.service.providers.CloudRegionCacheServiceProvider;
+import org.onap.so.aaisimulator.utils.HttpServiceUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+/**
+ * @author Waqas Ikram (waqas.ikram@est.tech)
+ *
+ */
+@Controller
+@RequestMapping(path = CLOUD_REGIONS)
+public class CloudRegionsController {
+    private static final Logger LOGGER = LoggerFactory.getLogger(CloudRegionsController.class);
+
+    private final CloudRegionCacheServiceProvider cacheServiceProvider;
+
+    @Autowired
+    public CloudRegionsController(final CloudRegionCacheServiceProvider cacheServiceProvider) {
+        this.cacheServiceProvider = cacheServiceProvider;
+    }
+
+    @PutMapping(value = "{cloud-owner}/{cloud-region-id}",
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putCloudRegion(@RequestBody final CloudRegion cloudRegion,
+            @PathVariable("cloud-owner") final String cloudOwner,
+            @PathVariable("cloud-region-id") final String cloudRegionId, final HttpServletRequest request) {
+
+        final CloudRegionKey key = new CloudRegionKey(cloudOwner, cloudRegionId);
+
+        if (key.isValid()) {
+            LOGGER.info("Will add CloudRegion to cache with key 'key': {} ....", key);
+            if (cloudRegion.getResourceVersion() == null || cloudRegion.getResourceVersion().isEmpty()) {
+                cloudRegion.setResourceVersion(getResourceVersion());
+            }
+            cacheServiceProvider.putCloudRegion(key, cloudRegion);
+            return ResponseEntity.accepted().build();
+        }
+
+        LOGGER.error("Unable to add CloudRegion in cache because of invalid key {}", key);
+        return getRequestErrorResponseEntity(request, CLOUD_REGION);
+    }
+
+    @GetMapping(value = "{cloud-owner}/{cloud-region-id}",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getCloudRegion(@PathVariable("cloud-owner") final String cloudOwner,
+            @PathVariable("cloud-region-id") final String cloudRegionId,
+            @RequestParam(name = "depth", required = false) final Integer depth, final HttpServletRequest request) {
+        final CloudRegionKey key = new CloudRegionKey(cloudOwner, cloudRegionId);
+        LOGGER.info("Retrieving CloudRegion using key : {} with depth: {}...", key, depth);
+        if (key.isValid()) {
+            final Optional<CloudRegion> optional = cacheServiceProvider.getCloudRegion(key);
+            if (optional.isPresent()) {
+                final CloudRegion cloudRegion = optional.get();
+                LOGGER.info("found CloudRegion {} in cache", cloudRegion);
+                return ResponseEntity.ok(cloudRegion);
+            }
+        }
+        LOGGER.error("Unable to find CloudRegion in cache using {}", key);
+        return getRequestErrorResponseEntity(request, CLOUD_REGION);
+    }
+
+    @PutMapping(value = "{cloud-owner}/{cloud-region-id}" + BI_DIRECTIONAL_RELATIONSHIP_LIST_URL,
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putRelationShip(@PathVariable("cloud-owner") final String cloudOwner,
+            @PathVariable("cloud-region-id") final String cloudRegionId, @RequestBody final Relationship relationship,
+            final HttpServletRequest request) {
+        LOGGER.info("Will add {} relationship to : {} ...", relationship.getRelatedTo());
+
+        final CloudRegionKey key = new CloudRegionKey(cloudOwner, cloudRegionId);
+
+        final Optional<Relationship> optional =
+                cacheServiceProvider.addRelationShip(key, relationship, request.getRequestURI());
+
+        if (optional.isPresent()) {
+            final Relationship resultantRelationship = optional.get();
+            LOGGER.info("Relationship add, sending resultant relationship: {} in response ...", resultantRelationship);
+            return ResponseEntity.accepted().body(resultantRelationship);
+        }
+
+        LOGGER.error("Couldn't add {} relationship for 'key': {} ...", relationship.getRelatedTo(), key);
+        return getRequestErrorResponseEntity(request, VSERVER);
+
+    }
+
+    @PutMapping(value = "{cloud-owner}/{cloud-region-id}/tenants/tenant/{tenant-id}",
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putTenant(@RequestBody final Tenant tenant,
+            @PathVariable("cloud-owner") final String cloudOwner,
+            @PathVariable("cloud-region-id") final String cloudRegionId,
+            @PathVariable("tenant-id") final String tenantId, final HttpServletRequest request) {
+
+        final CloudRegionKey key = new CloudRegionKey(cloudOwner, cloudRegionId);
+
+        if (key.isValid()) {
+            LOGGER.info("Will add Tenant to cache with key 'key': {} ....", key);
+            if (tenant.getResourceVersion() == null || tenant.getResourceVersion().isEmpty()) {
+                tenant.setResourceVersion(getResourceVersion());
+            }
+            if (cacheServiceProvider.putTenant(key, tenantId, tenant)) {
+                return ResponseEntity.accepted().build();
+            }
+        }
+
+        LOGGER.error("Unable to add Tenant in cache using key {}", key);
+        return getRequestErrorResponseEntity(request, CLOUD_REGION);
+    }
+
+    @GetMapping(value = "{cloud-owner}/{cloud-region-id}/tenants/tenant/{tenant-id}",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getTenant(@PathVariable("cloud-owner") final String cloudOwner,
+            @PathVariable("cloud-region-id") final String cloudRegionId,
+            @PathVariable("tenant-id") final String tenantId, final HttpServletRequest request) {
+        final CloudRegionKey key = new CloudRegionKey(cloudOwner, cloudRegionId);
+        LOGGER.info("Retrieving Tenant using key : {} and tenant-id:{} ...", key, tenantId);
+        if (key.isValid()) {
+            final Optional<Tenant> optional = cacheServiceProvider.getTenant(key, tenantId);
+            if (optional.isPresent()) {
+                final Tenant tenant = optional.get();
+                LOGGER.info("found Tenant {} in cache", tenant);
+                return ResponseEntity.ok(tenant);
+            }
+        }
+        LOGGER.error("Unable to find Tenant in cache key : {} and tenant-id:{} ...", key, tenantId);
+        return getRequestErrorResponseEntity(request, CLOUD_REGION);
+    }
+
+    @PutMapping(
+            value = "{cloud-owner}/{cloud-region-id}/tenants/tenant/{tenant-id}" + RELATIONSHIP_LIST_RELATIONSHIP_URL,
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putRelationShip(@RequestBody final Relationship relationship,
+            @PathVariable("cloud-owner") final String cloudOwner,
+            @PathVariable("cloud-region-id") final String cloudRegionId,
+            @PathVariable("tenant-id") final String tenantId, final HttpServletRequest request) {
+
+        final CloudRegionKey key = new CloudRegionKey(cloudOwner, cloudRegionId);
+        LOGGER.info("Will put RelationShip for key : {} and tenant-id:{} ...", key, tenantId);
+
+        if (relationship.getRelatedLink() != null) {
+            final String targetBaseUrl = HttpServiceUtils.getBaseUrl(request).toString();
+            final HttpHeaders incomingHeader = getHeaders(request);
+            final boolean result = cacheServiceProvider.addRelationShip(incomingHeader, targetBaseUrl,
+                    request.getRequestURI(), key, tenantId, relationship);
+            if (result) {
+                LOGGER.info("added created bi directional relationship with {}", relationship.getRelatedLink());
+                return ResponseEntity.accepted().build();
+            }
+
+        }
+        LOGGER.error("Unable to add relationship for related link: {}", relationship.getRelatedLink());
+        return getRequestErrorResponseEntity(request, CLOUD_REGION);
+    }
+
+    @PutMapping(value = "{cloud-owner}/{cloud-region-id}/esr-system-info-list/esr-system-info/{esr-system-info-id}",
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putEsrSystemInfo(@RequestBody final EsrSystemInfo esrSystemInfo,
+            @PathVariable("esr-system-info-id") final String esrSystemInfoId,
+            @PathVariable("cloud-owner") final String cloudOwner,
+            @PathVariable("cloud-region-id") final String cloudRegionId, final HttpServletRequest request) {
+
+        final CloudRegionKey key = new CloudRegionKey(cloudOwner, cloudRegionId);
+
+        LOGGER.info("Will put esrSystemInfo for 'key': {} ...", key);
+
+        if (esrSystemInfo.getResourceVersion() == null || esrSystemInfo.getResourceVersion().isEmpty()) {
+            esrSystemInfo.setResourceVersion(getResourceVersion());
+
+        }
+
+        if (cacheServiceProvider.putEsrSystemInfo(key, esrSystemInfoId, esrSystemInfo)) {
+            LOGGER.info("Successfully added EsrSystemInfo key : {}  ...", key, esrSystemInfo);
+            return ResponseEntity.accepted().build();
+        }
+        LOGGER.error("Unable to add EsrSystemInfo in cache for key : {} ...", key);
+
+        return getRequestErrorResponseEntity(request, ESR_SYSTEM_INFO_LIST);
+    }
+
+    @GetMapping(value = "{cloud-owner}/{cloud-region-id}/esr-system-info-list",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getEsrSystemInfoList(@PathVariable("cloud-owner") final String cloudOwner,
+            @PathVariable("cloud-region-id") final String cloudRegionId, final HttpServletRequest request) {
+        final CloudRegionKey key = new CloudRegionKey(cloudOwner, cloudRegionId);
+        LOGGER.info("Retrieving EsrSystemInfoList using key : {} ...", key);
+        if (key.isValid()) {
+            final Optional<EsrSystemInfoList> optional = cacheServiceProvider.getEsrSystemInfoList(key);
+            if (optional.isPresent()) {
+                final EsrSystemInfoList esrSystemInfoList = optional.get();
+                LOGGER.info("found EsrSystemInfoList {} in cache", esrSystemInfoList);
+                return ResponseEntity.ok(esrSystemInfoList);
+            }
+        }
+        LOGGER.error("Unable to find EsrSystemInfoList in cache using key : {} ...", key);
+        return getRequestErrorResponseEntity(request, CLOUD_REGION);
+    }
+
+    @PutMapping(value = "{cloud-owner}/{cloud-region-id}/tenants/tenant/{tenant-id}/vservers/vserver/{vserver-id}",
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putVserver(@RequestBody final Vserver vServer,
+            @PathVariable("cloud-owner") final String cloudOwner,
+            @PathVariable("cloud-region-id") final String cloudRegionId,
+            @PathVariable("tenant-id") final String tenantId, @PathVariable("vserver-id") final String vServerId,
+            final HttpServletRequest request) {
+
+        final CloudRegionKey key = new CloudRegionKey(cloudOwner, cloudRegionId);
+        if (vServer.getResourceVersion() == null || vServer.getResourceVersion().isEmpty()) {
+            vServer.setResourceVersion(getResourceVersion());
+        }
+        LOGGER.info("Will put Vserver in cache using using key: {}, tenantId: {}, vServerId: {} ...", key, tenantId,
+                vServerId);
+
+        if (cacheServiceProvider.putVserver(key, tenantId, vServerId, vServer)) {
+
+            if (vServer.getRelationshipList() != null) {
+                for (final Relationship relationship : vServer.getRelationshipList().getRelationship()) {
+                    if (relationship.getRelatedLink() != null) {
+                        final String requestUri = request.getRequestURI();
+                        final String targetBaseUrl =
+                                HttpServiceUtils.getBaseUrl(request.getRequestURL(), requestUri).toString();
+                        final HttpHeaders incomingHeader = getHeaders(request);
+                        final boolean result = cacheServiceProvider.addVServerRelationShip(incomingHeader,
+                                targetBaseUrl, requestUri, key, tenantId, vServerId, relationship);
+                        if (!result) {
+                            LOGGER.error(
+                                    "Unable to add Vserver relationship in cache using key: {}, tenantId: {}, vServerId: {}",
+                                    key, tenantId, vServerId);
+                            return getRequestErrorResponseEntity(request, CLOUD_REGION);
+                        }
+                        LOGGER.info("Successfully added relationship with {}", relationship.getRelatedLink());
+                    }
+                }
+            }
+
+            LOGGER.info("Successfully added Vserver for key: {}, tenantId: {}, vServerId: {} ...", key, tenantId,
+                    vServerId);
+            return ResponseEntity.accepted().build();
+        }
+        LOGGER.error("Unable to add Vserver in cache using key: {}, tenantId: {}, vServerId: {}", key, tenantId,
+                vServerId);
+        return getRequestErrorResponseEntity(request, CLOUD_REGION);
+    }
+
+    @GetMapping(value = "{cloud-owner}/{cloud-region-id}/tenants/tenant/{tenant-id}/vservers/vserver/{vserver-id}",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getVserver(@PathVariable("cloud-owner") final String cloudOwner,
+            @PathVariable("cloud-region-id") final String cloudRegionId,
+            @PathVariable("tenant-id") final String tenantId, @PathVariable("vserver-id") final String vServerId,
+            final HttpServletRequest request) {
+
+        final CloudRegionKey key = new CloudRegionKey(cloudOwner, cloudRegionId);
+        LOGGER.info("Retrieving Vserver using key: {}, tenant-id: {}  and vserver-id: {}...", key, tenantId, vServerId);
+        final Optional<Vserver> optional = cacheServiceProvider.getVserver(key, tenantId, vServerId);
+        if (optional.isPresent()) {
+            final Vserver vServer = optional.get();
+            LOGGER.info("found Vserver {} in cache", vServer);
+            return ResponseEntity.ok(vServer);
+        }
+        LOGGER.error("Unable to find Vserver in cache using key: {}, tenant-id: {}  and vserver-id: {}...", key,
+                tenantId, vServerId);
+        return getRequestErrorResponseEntity(request, CLOUD_REGION);
+    }
+
+
+    @DeleteMapping(value = "{cloud-owner}/{cloud-region-id}/tenants/tenant/{tenant-id}/vservers/vserver/{vserver-id}",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> deleteVserver(@PathVariable("cloud-owner") final String cloudOwner,
+            @PathVariable("cloud-region-id") final String cloudRegionId,
+            @PathVariable("tenant-id") final String tenantId, @PathVariable("vserver-id") final String vServerId,
+            @RequestParam(name = "resource-version") final String resourceVersion, final HttpServletRequest request) {
+
+        final CloudRegionKey key = new CloudRegionKey(cloudOwner, cloudRegionId);
+        LOGGER.info("Will delete Vserver using key: {}, tenant-id: {}, vserver-id: {} and resource-version: {}...", key,
+                tenantId, vServerId, resourceVersion);
+
+
+        if (cacheServiceProvider.deleteVserver(key, tenantId, vServerId, resourceVersion)) {
+            LOGGER.info(
+                    "Successfully delete Vserver from cache for key: {}, tenant-id: {}, vserver-id: {} and resource-version: {}",
+                    key, tenantId, vServerId, resourceVersion);
+            return ResponseEntity.noContent().build();
+        }
+
+        LOGGER.error(
+                "Unable to delete Vserver from cache using key: {}, tenant-id: {}, vserver-id: {} and resource-version: {} ...",
+                key, tenantId, vServerId, resourceVersion);
+        return getRequestErrorResponseEntity(request, CLOUD_REGION);
+    }
+
+    @PutMapping(
+            value = "{cloud-owner}/{cloud-region-id}/tenants/tenant/{tenant-id}/vservers/vserver/{vserver-id}"
+                    + RELATIONSHIP_LIST_RELATIONSHIP_URL,
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putVserverRelationShip(@PathVariable("cloud-owner") final String cloudOwner,
+            @PathVariable("cloud-region-id") final String cloudRegionId,
+            @PathVariable("tenant-id") final String tenantId, @PathVariable("vserver-id") final String vServerId,
+            @RequestBody final Relationship relationship, final HttpServletRequest request) {
+        final CloudRegionKey key = new CloudRegionKey(cloudOwner, cloudRegionId);
+        LOGGER.info("Will add {} relationship to : {} ...", relationship.getRelatedTo());
+
+        if (relationship.getRelatedLink() != null) {
+            final String targetBaseUrl = HttpServiceUtils.getBaseUrl(request).toString();
+            final HttpHeaders incomingHeader = getHeaders(request);
+            final boolean result = cacheServiceProvider.addVServerRelationShip(incomingHeader, targetBaseUrl,
+                    request.getRequestURI(), key, tenantId, vServerId, relationship);
+            if (result) {
+                LOGGER.info("added created bi directional relationship with {}", relationship.getRelatedLink());
+                return ResponseEntity.accepted().build();
+            }
+        }
+        LOGGER.error("Couldn't add {} relationship for 'key': {} ...", relationship.getRelatedTo(), key);
+        return getRequestErrorResponseEntity(request, CLOUD_REGION);
+
+    }
+
+    @PutMapping(
+            value = "{cloud-owner}/{cloud-region-id}/tenants/tenant/{tenant-id}/vservers/vserver/{vserver-id}"
+                    + BI_DIRECTIONAL_RELATIONSHIP_LIST_URL,
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putBiDirectionalVServerRelationShip(@PathVariable("cloud-owner") final String cloudOwner,
+            @PathVariable("cloud-region-id") final String cloudRegionId,
+            @PathVariable("tenant-id") final String tenantId, @PathVariable("vserver-id") final String vServerId,
+            @RequestBody final Relationship relationship, final HttpServletRequest request) {
+        final CloudRegionKey key = new CloudRegionKey(cloudOwner, cloudRegionId);
+        LOGGER.info("Will add {} relationship to : {} ...", relationship.getRelatedTo());
+
+        final Optional<Relationship> optional = cacheServiceProvider.addvServerRelationShip(key, tenantId, vServerId,
+                relationship, request.getRequestURI());
+
+        if (optional.isPresent()) {
+            final Relationship resultantRelationship = optional.get();
+            LOGGER.info("Relationship add, sending resultant relationship: {} in response ...", resultantRelationship);
+            return ResponseEntity.accepted().body(resultantRelationship);
+        }
+        LOGGER.error("Couldn't add {} relationship for 'key': {} ...", relationship.getRelatedTo(), key);
+        return getRequestErrorResponseEntity(request, CLOUD_REGION);
+
+    }
+}
diff --git a/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/ExternalSystemEsrController.java b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/ExternalSystemEsrController.java
new file mode 100755
index 00000000..297c2eb0
--- /dev/null
+++ b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/ExternalSystemEsrController.java
@@ -0,0 +1,175 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.aaisimulator.controller;
+
+import static org.onap.so.aaisimulator.utils.Constants.ESR_SYSTEM_INFO;
+import static org.onap.so.aaisimulator.utils.Constants.ESR_SYSTEM_INFO_LIST;
+import static org.onap.so.aaisimulator.utils.Constants.ESR_VNFM;
+import static org.onap.so.aaisimulator.utils.Constants.EXTERNAL_SYSTEM_ESR_VNFM_LIST_URL;
+import static org.onap.so.aaisimulator.utils.Constants.RELATIONSHIP_LIST_RELATIONSHIP_URL;
+import static org.onap.so.aaisimulator.utils.HttpServiceUtils.getHeaders;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getRequestErrorResponseEntity;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getResourceVersion;
+import java.util.List;
+import java.util.Optional;
+import javax.servlet.http.HttpServletRequest;
+import javax.ws.rs.core.MediaType;
+import org.onap.aai.domain.yang.EsrSystemInfo;
+import org.onap.aai.domain.yang.EsrSystemInfoList;
+import org.onap.aai.domain.yang.EsrVnfm;
+import org.onap.aai.domain.yang.EsrVnfmList;
+import org.onap.aai.domain.yang.Relationship;
+import org.onap.so.aaisimulator.service.providers.ExternalSystemCacheServiceProvider;
+import org.onap.so.aaisimulator.utils.HttpServiceUtils;
+import org.onap.so.aaisimulator.utils.RequestErrorResponseUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+/**
+ * @author Waqas Ikram (waqas.ikram@est.tech)
+ *
+ */
+@Controller
+@RequestMapping(path = EXTERNAL_SYSTEM_ESR_VNFM_LIST_URL)
+public class ExternalSystemEsrController {
+    private static final Logger LOGGER = LoggerFactory.getLogger(ExternalSystemEsrController.class);
+
+    private final ExternalSystemCacheServiceProvider cacheServiceProvider;
+
+    @Autowired
+    public ExternalSystemEsrController(final ExternalSystemCacheServiceProvider cacheServiceProvider) {
+        this.cacheServiceProvider = cacheServiceProvider;
+    }
+
+    @PutMapping(value = "/esr-vnfm/{vnfm-id}", consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putEsrVnfm(@RequestBody final EsrVnfm esrVnfm,
+            @PathVariable("vnfm-id") final String vnfmId, final HttpServletRequest request) {
+        LOGGER.info("Will put esr-vnfm to cache for 'vnfm id': {} ...", esrVnfm.getVnfmId());
+
+        if (esrVnfm.getResourceVersion() == null || esrVnfm.getResourceVersion().isEmpty()) {
+            esrVnfm.setResourceVersion(getResourceVersion());
+
+        }
+        cacheServiceProvider.putEsrVnfm(vnfmId, esrVnfm);
+        return ResponseEntity.accepted().build();
+    }
+
+    @GetMapping(value = "/esr-vnfm/{vnfm-id}", produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getEsrVnfm(@PathVariable("vnfm-id") final String vnfmId,
+            @RequestParam(name = "depth", required = false) final Integer depth, final HttpServletRequest request) {
+        LOGGER.info("Will retrieve ESR VNFM for 'vnfm id': {} with depth: {}...", vnfmId, depth);
+
+        final Optional<EsrVnfm> optional = cacheServiceProvider.getEsrVnfm(vnfmId);
+        if (optional.isPresent()) {
+            final EsrVnfm esrVnfm = optional.get();
+            LOGGER.info("found esrVnfm {} in cache", esrVnfm);
+            return ResponseEntity.ok(esrVnfm);
+        }
+
+        LOGGER.error("Couldn't Esr Vnfm for 'vnfm id': {} with depth: {}...", vnfmId, depth);
+        return getRequestErrorResponseEntity(request, ESR_VNFM);
+    }
+
+    @GetMapping(produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getEsrVnfmList(final HttpServletRequest request) {
+        LOGGER.info("Will retrieve a list of all ESR VNFMs");
+
+        final List<EsrVnfm> esrVnfms = cacheServiceProvider.getAllEsrVnfm();
+        LOGGER.info("found {} Esr Vnfms in cache", esrVnfms.size());
+
+        final EsrVnfmList esrVnfmList = new EsrVnfmList();
+        esrVnfmList.getEsrVnfm().addAll(esrVnfms);
+
+        return ResponseEntity.ok(esrVnfmList);
+    }
+
+    @PutMapping(value = "/esr-vnfm/{vnfm-id}/esr-system-info-list/esr-system-info/{esr-system-info-id}",
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putEsrSystemInfo(@RequestBody final EsrSystemInfo esrSystemInfo,
+            @PathVariable("vnfm-id") final String vnfmId,
+            @PathVariable("esr-system-info-id") final String esrSystemInfoId, final HttpServletRequest request) {
+        LOGGER.info("Will put esrSystemInfo for 'vnfm id': {} and 'esr-system-info-id': {} ...", vnfmId, esrSystemInfo);
+
+        if (esrSystemInfo.getResourceVersion() == null || esrSystemInfo.getResourceVersion().isEmpty()) {
+            esrSystemInfo.setResourceVersion(getResourceVersion());
+
+        }
+
+        if (cacheServiceProvider.putEsrSystemInfo(vnfmId, esrSystemInfoId, esrSystemInfo)) {
+            LOGGER.info("Successfully added EsrSystemInfo for 'vnfm id': {} and 'esr-system-info-id': {} ...", vnfmId,
+                    esrSystemInfo);
+            return ResponseEntity.accepted().build();
+        }
+        LOGGER.error("Unable to add esrSystemInfo for 'vnfm id': {} and 'esr-system-info-id': {} ...", vnfmId,
+                esrSystemInfo);
+        return getRequestErrorResponseEntity(request, ESR_SYSTEM_INFO_LIST);
+    }
+
+    @GetMapping(value = "/esr-vnfm/{vnfm-id}/esr-system-info-list",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getEsrSystemInfoList(@PathVariable("vnfm-id") final String vnfmId,
+            final HttpServletRequest request) {
+        LOGGER.info("Will retrieve esrSystemInfoList for 'vnfm id': {} ...", vnfmId);
+
+        final Optional<EsrSystemInfoList> optional = cacheServiceProvider.getEsrSystemInfoList(vnfmId);
+        if (optional.isPresent()) {
+            final EsrSystemInfoList esrSystemInfoList = optional.get();
+            LOGGER.info("found esrSystemInfoList {} in cache", esrSystemInfoList);
+            return ResponseEntity.ok(esrSystemInfoList);
+        }
+
+        LOGGER.error("Couldn't find esrSystemInfoList for 'vnfm id': {} ...", vnfmId);
+        return getRequestErrorResponseEntity(request, ESR_SYSTEM_INFO);
+    }
+
+    @PutMapping(value = "/esr-vnfm/{vnfm-id}" + RELATIONSHIP_LIST_RELATIONSHIP_URL,
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putEsrVnfmRelationShip(@RequestBody final Relationship relationship,
+            @PathVariable("vnfm-id") final String vnfmId, final HttpServletRequest request) {
+        LOGGER.info("Will put RelationShip for 'vnfm-id': {} ...", vnfmId);
+
+        if (relationship.getRelatedLink() != null) {
+            final String targetBaseUrl = HttpServiceUtils.getBaseUrl(request).toString();
+            final HttpHeaders incomingHeader = getHeaders(request);
+            final boolean result = cacheServiceProvider.addRelationShip(incomingHeader, targetBaseUrl,
+                    request.getRequestURI(), vnfmId, relationship);
+            if (result) {
+                LOGGER.info("added created bi directional relationship with {}", relationship.getRelatedLink());
+                return ResponseEntity.accepted().build();
+            }
+        }
+        LOGGER.error("Unable to add relationship for related link: {}", relationship.getRelatedLink());
+        return RequestErrorResponseUtils.getRequestErrorResponseEntity(request, ESR_VNFM);
+    }
+
+}
diff --git a/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/GenericVnfsController.java b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/GenericVnfsController.java
new file mode 100755
index 00000000..43fe47da
--- /dev/null
+++ b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/GenericVnfsController.java
@@ -0,0 +1,215 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.aaisimulator.controller;
+
+import static org.onap.so.aaisimulator.utils.Constants.APPLICATION_MERGE_PATCH_JSON;
+import static org.onap.so.aaisimulator.utils.Constants.BI_DIRECTIONAL_RELATIONSHIP_LIST_URL;
+import static org.onap.so.aaisimulator.utils.Constants.GENERIC_VNF;
+import static org.onap.so.aaisimulator.utils.Constants.GENERIC_VNFS_URL;
+import static org.onap.so.aaisimulator.utils.Constants.RELATIONSHIP_LIST_RELATIONSHIP_URL;
+import static org.onap.so.aaisimulator.utils.Constants.X_HTTP_METHOD_OVERRIDE;
+import static org.onap.so.aaisimulator.utils.HttpServiceUtils.getHeaders;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getRequestErrorResponseEntity;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getResourceVersion;
+import java.util.List;
+import java.util.Optional;
+import javax.servlet.http.HttpServletRequest;
+import javax.ws.rs.core.MediaType;
+import org.onap.aai.domain.yang.GenericVnf;
+import org.onap.aai.domain.yang.GenericVnfs;
+import org.onap.aai.domain.yang.Relationship;
+import org.onap.so.aaisimulator.service.providers.GenericVnfCacheServiceProvider;
+import org.onap.so.aaisimulator.utils.HttpServiceUtils;
+import org.onap.so.aaisimulator.utils.RequestErrorResponseUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+/**
+ * @author Waqas Ikram (waqas.ikram@est.tech)
+ *
+ */
+@Controller
+@RequestMapping(path = GENERIC_VNFS_URL)
+public class GenericVnfsController {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(GenericVnfsController.class);
+
+    private final GenericVnfCacheServiceProvider cacheServiceProvider;
+
+
+    @Autowired
+    public GenericVnfsController(final GenericVnfCacheServiceProvider cacheServiceProvider) {
+        this.cacheServiceProvider = cacheServiceProvider;
+    }
+
+    @PutMapping(value = "/generic-vnf/{vnf-id}", consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putGenericVnf(@RequestBody final GenericVnf genericVnf,
+            @PathVariable("vnf-id") final String vnfId, final HttpServletRequest request) {
+        LOGGER.info("Will add GenericVnf to cache with 'vnf-id': {} ...", vnfId);
+
+        if (genericVnf.getResourceVersion() == null || genericVnf.getResourceVersion().isEmpty()) {
+            genericVnf.setResourceVersion(getResourceVersion());
+
+        }
+        cacheServiceProvider.putGenericVnf(vnfId, genericVnf);
+        return ResponseEntity.accepted().build();
+
+    }
+
+    @GetMapping(value = "/generic-vnf/{vnf-id}", produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getGenericVnf(@PathVariable("vnf-id") final String vnfId,
+            @RequestParam(name = "depth", required = false) final Integer depth,
+            @RequestParam(name = "resultIndex", required = false) final Integer resultIndex,
+            @RequestParam(name = "resultSize", required = false) final Integer resultSize,
+            @RequestParam(name = "format", required = false) final String format, final HttpServletRequest request) {
+        LOGGER.info(
+                "Will get GenericVnf for 'vnf-id': {} with depth: {}, resultIndex: {}, resultSize:{}, format: {} ...",
+                vnfId, depth, resultIndex, resultSize, format);
+
+        final Optional<GenericVnf> optional = cacheServiceProvider.getGenericVnf(vnfId);
+
+        if (optional.isPresent()) {
+            final GenericVnf genericVnf = optional.get();
+            LOGGER.info("found GenericVnf {} in cache", genericVnf);
+            return ResponseEntity.ok(genericVnf);
+        }
+
+        LOGGER.error(
+                "Unable to find GenericVnf in cache for 'vnf-id': {} with depth: {}, resultIndex: {}, resultSize:{}, format:{} ...",
+                vnfId, depth, resultIndex, resultSize, format);
+        return getRequestErrorResponseEntity(request, GENERIC_VNF);
+
+    }
+
+    @PutMapping(value = "/generic-vnf/{vnf-id}" + RELATIONSHIP_LIST_RELATIONSHIP_URL,
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putGenericVnfRelationShip(@RequestBody final Relationship relationship,
+            @PathVariable("vnf-id") final String vnfId, final HttpServletRequest request) {
+        LOGGER.info("Will put RelationShip for 'vnf-id': {} ...", vnfId);
+
+        if (relationship.getRelatedLink() != null) {
+            final String targetBaseUrl = HttpServiceUtils.getBaseUrl(request).toString();
+            final HttpHeaders incomingHeader = getHeaders(request);
+            final boolean result = cacheServiceProvider.addRelationShip(incomingHeader, targetBaseUrl,
+                    request.getRequestURI(), vnfId, relationship);
+            if (result) {
+                LOGGER.info("added created bi directional relationship with {}", relationship.getRelatedLink());
+                return ResponseEntity.accepted().build();
+            }
+        }
+        LOGGER.error("Unable to add relationship for related link: {}", relationship.getRelatedLink());
+        return RequestErrorResponseUtils.getRequestErrorResponseEntity(request, GENERIC_VNF);
+    }
+
+    @PutMapping(value = "/generic-vnf/{vnf-id}" + BI_DIRECTIONAL_RELATIONSHIP_LIST_URL,
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putBiDirectionalRelationShip(@RequestBody final Relationship relationship,
+            @PathVariable("vnf-id") final String vnfId, final HttpServletRequest request) {
+        LOGGER.info("Will put RelationShip for 'vnf-id': {} ...", vnfId);
+
+        final Optional<Relationship> optional =
+                cacheServiceProvider.addRelationShip(vnfId, relationship, request.getRequestURI());
+
+        if (optional.isPresent()) {
+            final Relationship resultantRelationship = optional.get();
+            LOGGER.info("Relationship add, sending resultant relationship: {} in response ...", resultantRelationship);
+            return ResponseEntity.accepted().body(resultantRelationship);
+        }
+
+        LOGGER.error("Unable to add relationship for related link: {}", relationship.getRelatedLink());
+        return RequestErrorResponseUtils.getRequestErrorResponseEntity(request, GENERIC_VNF);
+    }
+
+    @PostMapping(value = "/generic-vnf/{vnf-id}",
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML, APPLICATION_MERGE_PATCH_JSON},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> patchGenericVnf(@RequestBody final GenericVnf genericVnf,
+            @PathVariable("vnf-id") final String vnfId,
+            @RequestHeader(value = X_HTTP_METHOD_OVERRIDE, required = false) final String xHttpHeaderOverride,
+            final HttpServletRequest request) {
+
+        LOGGER.info("Will post GenericVnf to cache with 'vnf-id': {} and '{}': {} ...", vnfId, X_HTTP_METHOD_OVERRIDE,
+                xHttpHeaderOverride);
+
+        if (HttpMethod.PATCH.toString().equalsIgnoreCase(xHttpHeaderOverride)) {
+            if (cacheServiceProvider.patchGenericVnf(vnfId, genericVnf)) {
+                return ResponseEntity.accepted().build();
+            }
+            LOGGER.error("Unable to apply patch to GenericVnf using 'vnf-id': {} ... ", vnfId);
+            return getRequestErrorResponseEntity(request, GENERIC_VNF);
+        }
+        LOGGER.error("{} not supported ... ", xHttpHeaderOverride);
+
+        return getRequestErrorResponseEntity(request, GENERIC_VNF);
+    }
+
+    @GetMapping(produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getGenericVnfs(@RequestParam(name = "selflink") final String selflink,
+            final HttpServletRequest request) {
+        LOGGER.info("will retrieve GenericVnfs using selflink: {}", selflink);
+
+        final List<GenericVnf> genericVnfList = cacheServiceProvider.getGenericVnfs(selflink);
+
+        if (genericVnfList.isEmpty()) {
+            LOGGER.error("No matching generic vnfs found using selflink: {}", selflink);
+            return getRequestErrorResponseEntity(request, GENERIC_VNF);
+        }
+
+        LOGGER.info("found {} GenericVnfs in cache", genericVnfList.size());
+        final GenericVnfs genericVnfs = new GenericVnfs();
+        genericVnfs.getGenericVnf().addAll(genericVnfList);
+        return ResponseEntity.ok(genericVnfs);
+    }
+
+    @DeleteMapping(value = "/generic-vnf/{vnf-id}", produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> deleteGenericVnf(@PathVariable("vnf-id") final String vnfId,
+            @RequestParam(name = "resource-version") final String resourceVersion, final HttpServletRequest request) {
+        LOGGER.info("Will delete GenericVnf for 'vnf-id': {} and 'resource-version': {}", vnfId, resourceVersion);
+
+        if (cacheServiceProvider.deleteGenericVnf(vnfId, resourceVersion)) {
+            LOGGER.info("Successfully delete GenericVnf from cache for 'vnf-id': {} and 'resource-version': {}", vnfId,
+                    resourceVersion);
+            return ResponseEntity.noContent().build();
+        }
+
+        LOGGER.error("Unable to delete GenericVnf for 'vnf-id': {} and 'resource-version': {} ...", vnfId,
+                resourceVersion);
+        return getRequestErrorResponseEntity(request, GENERIC_VNF);
+
+    }
+
+}
diff --git a/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/LinesOfBusinessController.java b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/LinesOfBusinessController.java
new file mode 100755
index 00000000..b3438d27
--- /dev/null
+++ b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/LinesOfBusinessController.java
@@ -0,0 +1,138 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.aaisimulator.controller;
+
+import static org.onap.so.aaisimulator.utils.Constants.BI_DIRECTIONAL_RELATIONSHIP_LIST_URL;
+import static org.onap.so.aaisimulator.utils.Constants.LINES_OF_BUSINESS_URL;
+import static org.onap.so.aaisimulator.utils.Constants.LINE_OF_BUSINESS;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getRequestErrorResponseEntity;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getResourceVersion;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import javax.servlet.http.HttpServletRequest;
+import javax.ws.rs.core.MediaType;
+import org.onap.aai.domain.yang.LineOfBusiness;
+import org.onap.aai.domain.yang.Relationship;
+import org.onap.so.aaisimulator.models.Format;
+import org.onap.so.aaisimulator.models.Results;
+import org.onap.so.aaisimulator.service.providers.LinesOfBusinessCacheServiceProvider;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+/**
+ * @author Waqas Ikram (waqas.ikram@est.tech)
+ *
+ */
+@Controller
+@RequestMapping(path = LINES_OF_BUSINESS_URL)
+public class LinesOfBusinessController {
+    private static final Logger LOGGER = LoggerFactory.getLogger(LinesOfBusinessController.class);
+
+    private final LinesOfBusinessCacheServiceProvider cacheServiceProvider;
+
+    @Autowired
+    public LinesOfBusinessController(final LinesOfBusinessCacheServiceProvider cacheServiceProvider) {
+        this.cacheServiceProvider = cacheServiceProvider;
+    }
+
+    @PutMapping(value = "{line-of-business-name}", consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putLineOfBusiness(@RequestBody final LineOfBusiness lineOfBusiness,
+            @PathVariable("line-of-business-name") final String lineOfBusinessName, final HttpServletRequest request) {
+
+        LOGGER.info("Will add LineOfBusiness to cache with key 'line-of-business-name': {} ...",
+                lineOfBusiness.getLineOfBusinessName());
+
+        if (lineOfBusiness.getResourceVersion() == null || lineOfBusiness.getResourceVersion().isEmpty()) {
+            lineOfBusiness.setResourceVersion(getResourceVersion());
+
+        }
+        cacheServiceProvider.putLineOfBusiness(lineOfBusinessName, lineOfBusiness);
+        return ResponseEntity.accepted().build();
+    }
+
+
+    @GetMapping(value = "{line-of-business-name}", produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getLineOfBusiness(@PathVariable("line-of-business-name") final String lineOfBusinessName,
+            @RequestParam(name = "depth", required = false) final Integer depth,
+            @RequestParam(name = "resultIndex", required = false) final Integer resultIndex,
+            @RequestParam(name = "resultSize", required = false) final Integer resultSize,
+            @RequestParam(name = "format", required = false) final String format, final HttpServletRequest request) {
+
+        LOGGER.info(
+                "retrieving Platform for 'platform-name': {} with depth: {}, resultIndex: {}, resultSize:{}, format: {} ...",
+                lineOfBusinessName, depth, resultIndex, resultSize, format);
+
+        final Optional<LineOfBusiness> optional = cacheServiceProvider.getLineOfBusiness(lineOfBusinessName);
+        if (optional.isPresent()) {
+
+            final Format value = Format.forValue(format);
+            switch (value) {
+                case RAW:
+                    final LineOfBusiness platform = optional.get();
+                    LOGGER.info("found LineOfBusiness {} in cache", platform);
+                    return ResponseEntity.ok(platform);
+                case COUNT:
+                    final Map<String, Object> map = new HashMap<>();
+                    map.put(LINE_OF_BUSINESS, 1);
+                    return ResponseEntity.ok(new Results(map));
+                default:
+                    break;
+            }
+            LOGGER.error("invalid format type :{}", format);
+        }
+        LOGGER.error("Unable to find LineOfBusiness in cache using {}", lineOfBusinessName);
+        return getRequestErrorResponseEntity(request, LINE_OF_BUSINESS);
+    }
+
+    @PutMapping(value = "/{line-of-business-name}" + BI_DIRECTIONAL_RELATIONSHIP_LIST_URL,
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putRelationShip(@PathVariable("line-of-business-name") final String lineOfBusinessName,
+            @RequestBody final Relationship relationship, final HttpServletRequest request) {
+        LOGGER.info("Will add {} relationship to : {} ...", relationship.getRelatedTo());
+
+        final Optional<Relationship> optional =
+                cacheServiceProvider.addRelationShip(lineOfBusinessName, relationship, request.getRequestURI());
+
+        if (optional.isPresent()) {
+            final Relationship resultantRelationship = optional.get();
+            LOGGER.info("Relationship add, sending resultant relationship: {} in response ...", resultantRelationship);
+            return ResponseEntity.accepted().body(resultantRelationship);
+        }
+
+        LOGGER.error("Couldn't add {} relationship for 'line-of-business-name': {} ...", relationship.getRelatedTo(),
+                lineOfBusinessName);
+
+        return getRequestErrorResponseEntity(request, LINE_OF_BUSINESS);
+
+    }
+
+}
diff --git a/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/NodesController.java b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/NodesController.java
new file mode 100755
index 00000000..21bcae93
--- /dev/null
+++ b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/NodesController.java
@@ -0,0 +1,115 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.aaisimulator.controller;
+
+import static org.onap.so.aaisimulator.utils.Constants.GENERIC_VNF;
+import static org.onap.so.aaisimulator.utils.Constants.NODES_URL;
+import static org.onap.so.aaisimulator.utils.Constants.RESOURCE_LINK;
+import static org.onap.so.aaisimulator.utils.Constants.RESOURCE_TYPE;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getRequestErrorResponseEntity;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Optional;
+import javax.servlet.http.HttpServletRequest;
+import javax.ws.rs.core.MediaType;
+import org.onap.aai.domain.yang.GenericVnfs;
+import org.onap.aai.domain.yang.ServiceInstance;
+import org.onap.so.aaisimulator.models.Format;
+import org.onap.so.aaisimulator.models.NodeServiceInstance;
+import org.onap.so.aaisimulator.models.Results;
+import org.onap.so.aaisimulator.service.providers.NodesCacheServiceProvider;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+/**
+ * @author waqas.ikram@ericsson.com
+ *
+ */
+@Controller
+@RequestMapping(path = NODES_URL)
+public class NodesController {
+
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(NodesController.class);
+
+    private final NodesCacheServiceProvider cacheServiceProvider;
+
+    @Autowired
+    public NodesController(final NodesCacheServiceProvider cacheServiceProvider) {
+        this.cacheServiceProvider = cacheServiceProvider;
+    }
+
+    @GetMapping(value = "/service-instances/service-instance/{service-instance-id}",
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getProject(@PathVariable(name = "service-instance-id") final String serviceInstanceId,
+            @RequestParam(name = "format", required = false) final String format, final HttpServletRequest request) {
+        LOGGER.info("retrieving service instance using 'service-instance-id': {} and format: {}...", serviceInstanceId,
+                format);
+
+        final Optional<NodeServiceInstance> optional = cacheServiceProvider.getNodeServiceInstance(serviceInstanceId);
+        if (!optional.isPresent()) {
+            LOGGER.error("Couldn't find {} in cache", serviceInstanceId);
+            return getRequestErrorResponseEntity(request);
+        }
+
+        final Format value = Format.forValue(format);
+        final NodeServiceInstance nodeServiceInstance = optional.get();
+        switch (value) {
+            case PATHED:
+                LOGGER.info("found project {} in cache", nodeServiceInstance);
+                final Map<String, Object> map = new LinkedHashMap<>();
+                map.put(RESOURCE_TYPE, nodeServiceInstance.getResourceType());
+                map.put(RESOURCE_LINK, nodeServiceInstance.getResourceLink());
+                return ResponseEntity.ok(new Results(map));
+            case RAW:
+                final Optional<ServiceInstance> serviceInstance =
+                        cacheServiceProvider.getServiceInstance(nodeServiceInstance);
+                if (serviceInstance.isPresent()) {
+                    return ResponseEntity.ok(serviceInstance.get());
+                }
+                LOGGER.error("Unable to find Service instance in cahce using {}", nodeServiceInstance);
+                return getRequestErrorResponseEntity(request);
+            default:
+                break;
+        }
+        LOGGER.error("invalid format type :{}", format);
+        return getRequestErrorResponseEntity(request);
+    }
+
+    @GetMapping(value = "/generic-vnfs", produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getGenericVnfs(@RequestParam(name = "vnf-name") final String vnfName,
+            final HttpServletRequest request) {
+        LOGGER.info("will find GenericVnfs for name: {}", vnfName);
+        final Optional<GenericVnfs> optional = cacheServiceProvider.getGenericVnfs(vnfName);
+        if (optional.isPresent()) {
+            LOGGER.info("found matching GenericVnfs for name: {}", vnfName);
+            return ResponseEntity.ok(optional.get());
+        }
+        LOGGER.error("Unable to find GenericVnfs in cahce using {}", vnfName);
+        return getRequestErrorResponseEntity(request, GENERIC_VNF);
+    }
+}
diff --git a/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/OwningEntityController.java b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/OwningEntityController.java
new file mode 100755
index 00000000..c5ade0cb
--- /dev/null
+++ b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/OwningEntityController.java
@@ -0,0 +1,137 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.aaisimulator.controller;
+
+import static org.onap.so.aaisimulator.utils.Constants.OWNING_ENTITY;
+import static org.onap.so.aaisimulator.utils.Constants.OWNING_ENTITY_URL;
+import static org.onap.so.aaisimulator.utils.HttpServiceUtils.getHeaders;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getRequestErrorResponseEntity;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getResourceVersion;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import javax.servlet.http.HttpServletRequest;
+import javax.ws.rs.core.MediaType;
+import org.onap.aai.domain.yang.OwningEntity;
+import org.onap.aai.domain.yang.Relationship;
+import org.onap.so.aaisimulator.models.Format;
+import org.onap.so.aaisimulator.models.Results;
+import org.onap.so.aaisimulator.service.providers.OwnEntityCacheServiceProvider;
+import org.onap.so.aaisimulator.utils.HttpServiceUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+/**
+ * @author waqas.ikram@ericsson.com
+ *
+ */
+@Controller
+@RequestMapping(path = OWNING_ENTITY_URL)
+public class OwningEntityController {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(OwningEntityController.class);
+
+    private final OwnEntityCacheServiceProvider cacheServiceProvider;
+
+    @Autowired
+    public OwningEntityController(final OwnEntityCacheServiceProvider cacheServiceProvider) {
+        this.cacheServiceProvider = cacheServiceProvider;
+    }
+
+    @PutMapping(value = "{owning-entity-id}", consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putOwningEntity(@RequestBody final OwningEntity owningEntity,
+            @PathVariable("owning-entity-id") final String owningEntityId, final HttpServletRequest request) {
+        LOGGER.info("Will add OwningEntity to cache with key 'owning-entity-id': {} ...",
+                owningEntity.getOwningEntityId());
+
+        if (owningEntity.getResourceVersion() == null || owningEntity.getResourceVersion().isEmpty()) {
+            owningEntity.setResourceVersion(getResourceVersion());
+
+        }
+        cacheServiceProvider.putOwningEntity(owningEntityId, owningEntity);
+        return ResponseEntity.accepted().build();
+    }
+
+    @GetMapping(value = "{owning-entity-id}", produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getOwningEntity(@PathVariable("owning-entity-id") final String owningEntityId,
+            @RequestParam(name = "resultIndex", required = false) final Integer resultIndex,
+            @RequestParam(name = "resultSize", required = false) final Integer resultSize,
+            @RequestParam(name = "format", required = false) final String format, final HttpServletRequest request) {
+        LOGGER.info("retrieving owning entity for 'owning-entity-id': {} ...", owningEntityId);
+
+        final Optional<OwningEntity> optional = cacheServiceProvider.getOwningEntity(owningEntityId);
+        if (!optional.isPresent()) {
+            LOGGER.error("Couldn't find {} in cache", owningEntityId);
+            return getRequestErrorResponseEntity(request);
+        }
+
+        final Format value = Format.forValue(format);
+        switch (value) {
+            case RAW:
+                final OwningEntity owningEntity = optional.get();
+                LOGGER.info("found OwningEntity {} in cache", owningEntity);
+                return ResponseEntity.ok(owningEntity);
+            case COUNT:
+                final Map<String, Object> map = new HashMap<>();
+                map.put(OWNING_ENTITY, 1);
+                return ResponseEntity.ok(new Results(map));
+            default:
+                break;
+        }
+        LOGGER.error("invalid format type :{}", format);
+        return getRequestErrorResponseEntity(request);
+    }
+
+    @PutMapping(value = "/{owning-entity-id}/relationship-list/relationship",
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putOwningEntityRelationShip(@RequestBody final Relationship relationship,
+            @PathVariable("owning-entity-id") final String owningEntityId, final HttpServletRequest request) {
+
+        LOGGER.info("adding relationship for owning-entity-id: {} ...", owningEntityId);
+
+        if (relationship.getRelatedLink() != null) {
+            final String targetBaseUrl = HttpServiceUtils.getBaseUrl(request).toString();
+            final HttpHeaders incomingHeader = getHeaders(request);
+
+            final boolean result = cacheServiceProvider.addRelationShip(incomingHeader, targetBaseUrl,
+                    request.getRequestURI(), owningEntityId, relationship);
+            if (result) {
+                LOGGER.info("added created bi directional relationship with {}", relationship.getRelatedLink());
+                return ResponseEntity.accepted().build();
+            }
+        }
+
+        LOGGER.error("Unable to add relationship for related link: {}", relationship.getRelatedLink());
+        return getRequestErrorResponseEntity(request);
+    }
+
+}
diff --git a/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/PlatformController.java b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/PlatformController.java
new file mode 100755
index 00000000..39e35947
--- /dev/null
+++ b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/PlatformController.java
@@ -0,0 +1,134 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.aaisimulator.controller;
+
+import static org.onap.so.aaisimulator.utils.Constants.BI_DIRECTIONAL_RELATIONSHIP_LIST_URL;
+import static org.onap.so.aaisimulator.utils.Constants.PLATFORM;
+import static org.onap.so.aaisimulator.utils.Constants.PLATFORMS_URL;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getRequestErrorResponseEntity;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getResourceVersion;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import javax.servlet.http.HttpServletRequest;
+import javax.ws.rs.core.MediaType;
+import org.onap.aai.domain.yang.Platform;
+import org.onap.aai.domain.yang.Relationship;
+import org.onap.so.aaisimulator.models.Format;
+import org.onap.so.aaisimulator.models.Results;
+import org.onap.so.aaisimulator.service.providers.PlatformCacheServiceProvider;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+/**
+ * @author Waqas Ikram (waqas.ikram@est.tech)
+ *
+ */
+@Controller
+@RequestMapping(path = PLATFORMS_URL)
+public class PlatformController {
+    private static final Logger LOGGER = LoggerFactory.getLogger(PlatformController.class);
+
+    private final PlatformCacheServiceProvider cacheServiceProvider;
+
+    @Autowired
+    public PlatformController(final PlatformCacheServiceProvider cacheServiceProvider) {
+        this.cacheServiceProvider = cacheServiceProvider;
+    }
+
+    @PutMapping(value = "{platform-name}", consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putPlatform(@RequestBody final Platform platform,
+            @PathVariable("platform-name") final String platformName, final HttpServletRequest request) {
+        LOGGER.info("Will add Platform to cache with key 'platform-name': {} ...", platform.getPlatformName());
+
+        if (platform.getResourceVersion() == null || platform.getResourceVersion().isEmpty()) {
+            platform.setResourceVersion(getResourceVersion());
+
+        }
+        cacheServiceProvider.putPlatform(platformName, platform);
+        return ResponseEntity.accepted().build();
+    }
+
+    @GetMapping(value = "/{platform-name}", produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getPlatform(@PathVariable("platform-name") final String platformName,
+            @RequestParam(name = "depth", required = false) final Integer depth,
+            @RequestParam(name = "resultIndex", required = false) final Integer resultIndex,
+            @RequestParam(name = "resultSize", required = false) final Integer resultSize,
+            @RequestParam(name = "format", required = false) final String format, final HttpServletRequest request) {
+
+        LOGGER.info(
+                "retrieving Platform for 'platform-name': {} with depth: {}, resultIndex: {}, resultSize:{}, format: {} ...",
+                platformName, depth, resultIndex, resultSize, format);
+        final Optional<Platform> optional = cacheServiceProvider.getPlatform(platformName);
+        if (optional.isPresent()) {
+
+            final Format value = Format.forValue(format);
+            switch (value) {
+                case RAW:
+                    final Platform platform = optional.get();
+                    LOGGER.info("found Platform {} in cache", platform);
+                    return ResponseEntity.ok(platform);
+                case COUNT:
+                    final Map<String, Object> map = new HashMap<>();
+                    map.put(PLATFORM, 1);
+                    return ResponseEntity.ok(new Results(map));
+                default:
+                    break;
+            }
+            LOGGER.error("invalid format type :{}", format);
+
+        }
+        LOGGER.error("Unable to find Platform in cahce using {}", platformName);
+        return getRequestErrorResponseEntity(request, PLATFORM);
+    }
+
+    @PutMapping(value = "/{platform-name}" + BI_DIRECTIONAL_RELATIONSHIP_LIST_URL,
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putRelationShip(@PathVariable("platform-name") final String platformName,
+            @RequestBody final Relationship relationship, final HttpServletRequest request) {
+        LOGGER.info("Will add {} relationship to : {} ...", relationship.getRelatedTo());
+
+        final Optional<Relationship> optional =
+                cacheServiceProvider.addRelationShip(platformName, relationship, request.getRequestURI());
+
+        if (optional.isPresent()) {
+            final Relationship resultantRelationship = optional.get();
+            LOGGER.info("Relationship add, sending resultant relationship: {} in response ...", resultantRelationship);
+            return ResponseEntity.accepted().body(resultantRelationship);
+        }
+
+        LOGGER.error("Couldn't add {} relationship for 'platform-name': {} ...", relationship.getRelatedTo(),
+                platformName);
+
+        return getRequestErrorResponseEntity(request, PLATFORM);
+
+    }
+}
diff --git a/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/PnfsController.java b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/PnfsController.java
new file mode 100755
index 00000000..ff0e3dcf
--- /dev/null
+++ b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/PnfsController.java
@@ -0,0 +1,159 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 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.
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.aaisimulator.controller;
+
+
+import org.onap.aai.domain.yang.v15.Pnf;
+import org.onap.aai.domain.yang.v15.Pnfs;
+import org.onap.so.aaisimulator.service.providers.PnfCacheServiceProvider;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.ws.rs.core.MediaType;
+import java.util.List;
+import java.util.Optional;
+
+import static org.onap.so.aaisimulator.utils.Constants.APPLICATION_MERGE_PATCH_JSON;
+import static org.onap.so.aaisimulator.utils.Constants.PNF;
+import static org.onap.so.aaisimulator.utils.Constants.PNFS_URL;
+import static org.onap.so.aaisimulator.utils.Constants.X_HTTP_METHOD_OVERRIDE;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getRequestErrorResponseEntity;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getResourceVersion;
+
+/**
+ * @author Raj Gumma (raj.gumma@est.tech)
+ */
+@Controller
+@RequestMapping(path = PNFS_URL)
+public class PnfsController {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(PnfsController.class);
+
+    private final PnfCacheServiceProvider cacheServiceProvider;
+
+
+    @Autowired
+    public PnfsController(final PnfCacheServiceProvider cacheServiceProvider) {
+        this.cacheServiceProvider = cacheServiceProvider;
+    }
+
+    @PutMapping(value = "/pnf/{pnf-id}", consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putPnf(@RequestBody final Pnf pnf,
+                                    @PathVariable("pnf-id") final String pnfId, final HttpServletRequest request) {
+        LOGGER.info("Will add Pnf to cache with 'pnf-id': {} ...", pnfId);
+
+        if (pnf.getResourceVersion() == null || pnf.getResourceVersion().isEmpty()) {
+            pnf.setResourceVersion(getResourceVersion());
+        }
+        cacheServiceProvider.putPnf(pnfId, pnf);
+        return ResponseEntity.accepted().build();
+    }
+
+    @GetMapping(value = "/pnf/{pnf-id}", produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getPnf(@PathVariable("pnf-id") final String pnfId, final HttpServletRequest request) {
+        LOGGER.info("Will get Pnf for 'pnf-id': {} ", pnfId);
+
+        final Optional<Pnf> optional = cacheServiceProvider.getPnf(pnfId);
+
+        if (optional.isPresent()) {
+            final Pnf pnf = optional.get();
+            LOGGER.info("found Pnf {} in cache", pnf);
+            return ResponseEntity.ok(pnf);
+        }
+
+        LOGGER.error("Unable to find Pnf in cache for 'pnf-id': {}", pnfId);
+        return getRequestErrorResponseEntity(request, "pnf");
+
+    }
+
+    @PostMapping(value = "/pnf/{pnf-id}",
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML, APPLICATION_MERGE_PATCH_JSON},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> patchPnf(@RequestBody final Pnf pnf,
+                                      @PathVariable("pnf-id") final String pnfId,
+                                      @RequestHeader(value = X_HTTP_METHOD_OVERRIDE, required = false) final String xHttpHeaderOverride,
+                                      final HttpServletRequest request) {
+
+        LOGGER.info("Will post Pnf to cache with 'pnf-id': {} and '{}': {} ...", pnfId, X_HTTP_METHOD_OVERRIDE,
+                xHttpHeaderOverride);
+
+        if (HttpMethod.PATCH.toString().equalsIgnoreCase(xHttpHeaderOverride)) {
+            if (cacheServiceProvider.patchPnf(pnfId, pnf)) {
+                return ResponseEntity.accepted().build();
+            }
+            LOGGER.error("Unable to apply patch to Pnf using 'pnf-id': {} ... ", pnfId);
+            return getRequestErrorResponseEntity(request, PNF);
+        }
+        LOGGER.error("{} not supported ... ", xHttpHeaderOverride);
+
+        return getRequestErrorResponseEntity(request, PNF);
+    }
+
+    @GetMapping(produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getPnfs(@RequestParam(name = "selflink") final String selflink,
+                                     final HttpServletRequest request) {
+        LOGGER.info("will retrieve Pnfs using selflink: {}", selflink);
+
+        final List<Pnf> pnfList = cacheServiceProvider.getPnfs(selflink);
+
+        if (pnfList.isEmpty()) {
+            LOGGER.error("No matching pnfs found using selflink: {}", selflink);
+            return getRequestErrorResponseEntity(request, PNF);
+        }
+
+        LOGGER.info("found {} Pnfs in cache", pnfList.size());
+        final Pnfs pnfs = new Pnfs();
+        pnfs.getPnf().addAll(pnfList);
+        return ResponseEntity.ok(pnfs);
+    }
+
+    @DeleteMapping(value = "/pnf/{pnf-id}", produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> deletePnf(@PathVariable("pnf-id") final String pnfId,
+                                       @RequestParam(name = "resource-version") final String resourceVersion, final HttpServletRequest request) {
+        LOGGER.info("Will delete Pnf for 'pnf-id': {} and 'resource-version': {}", pnfId, resourceVersion);
+
+        if (cacheServiceProvider.deletePnf(pnfId, resourceVersion)) {
+            LOGGER.info("Successfully delete Pnf from cache for 'pnf-id': {} and 'resource-version': {}", pnfId,
+                    resourceVersion);
+            return ResponseEntity.noContent().build();
+        }
+
+        LOGGER.error("Unable to delete Pnf for 'pnf-id': {} and 'resource-version': {} ...", pnfId,
+                resourceVersion);
+        return getRequestErrorResponseEntity(request, PNF);
+
+    }
+
+}
diff --git a/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/ProjectController.java b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/ProjectController.java
new file mode 100755
index 00000000..490982a5
--- /dev/null
+++ b/plans/usecases/pnf-sw-upgrade/so/simulator/aai-simulator/src/main/java/org/onap/so/aaisimulator/controller/ProjectController.java
@@ -0,0 +1,137 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.so.aaisimulator.controller;
+
+import static org.onap.so.aaisimulator.utils.Constants.PROJECT;
+import static org.onap.so.aaisimulator.utils.Constants.PROJECT_URL;
+import static org.onap.so.aaisimulator.utils.Constants.RELATIONSHIP_LIST_RELATIONSHIP_URL;
+import static org.onap.so.aaisimulator.utils.HttpServiceUtils.getHeaders;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getRequestErrorResponseEntity;
+import static org.onap.so.aaisimulator.utils.RequestErrorResponseUtils.getResourceVersion;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import javax.servlet.http.HttpServletRequest;
+import javax.ws.rs.core.MediaType;
+import org.onap.aai.domain.yang.Project;
+import org.onap.aai.domain.yang.Relationship;
+import org.onap.so.aaisimulator.models.Format;
+import org.onap.so.aaisimulator.models.Results;
+import org.onap.so.aaisimulator.service.providers.ProjectCacheServiceProvider;
+import org.onap.so.aaisimulator.utils.HttpServiceUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+
+/**
+ * @author waqas.ikram@ericsson.com
+ *
+ */
+@Controller
+@RequestMapping(path = PROJECT_URL)
+public class ProjectController {
+    private static final Logger LOGGER = LoggerFactory.getLogger(ProjectController.class);
+
+    private final ProjectCacheServiceProvider cacheServiceProvider;
+
+    @Autowired
+    public ProjectController(final ProjectCacheServiceProvider cacheServiceProvider) {
+        this.cacheServiceProvider = cacheServiceProvider;
+    }
+
+    @PutMapping(value = "/{project-name}", consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putProject(@RequestBody final Project project,
+            @PathVariable("project-name") final String projectName, final HttpServletRequest request) {
+        LOGGER.info("Will put project for 'project-name': {} ...", project.getProjectName());
+
+        if (project.getResourceVersion() == null || project.getResourceVersion().isEmpty()) {
+            project.setResourceVersion(getResourceVersion());
+
+        }
+        cacheServiceProvider.putProject(projectName, project);
+        return ResponseEntity.accepted().build();
+
+    }
+
+    @GetMapping(value = "/{project-name}", produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> getProject(@PathVariable("project-name") final String projectName,
+            @RequestParam(name = "resultIndex", required = false) final Integer resultIndex,
+            @RequestParam(name = "resultSize", required = false) final Integer resultSize,
+            @RequestParam(name = "format", required = false) final String format, final HttpServletRequest request) {
+        LOGGER.info("retrieving project for 'project-name': {} ...", projectName);
+
+        final Optional<Project> optional = cacheServiceProvider.getProject(projectName);
+        if (!optional.isPresent()) {
+            LOGGER.error("Couldn't find {} in cache", projectName);
+            return getRequestErrorResponseEntity(request);
+        }
+
+        final Format value = Format.forValue(format);
+        switch (value) {
+            case RAW:
+                final Project project = optional.get();
+                LOGGER.info("found project {} in cache", project);
+                return ResponseEntity.ok(project);
+            case COUNT:
+                final Map<String, Object> map = new HashMap<>();
+                map.put(PROJECT, 1);
+                return ResponseEntity.ok(new Results(map));
+            default:
+                break;
+        }
+        LOGGER.error("invalid format type :{}", format);
+        return getRequestErrorResponseEntity(request);
+    }
+
+    @PutMapping(value = "/{project-name}" + RELATIONSHIP_LIST_RELATIONSHIP_URL,
+            consumes = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML},
+            produces = {MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
+    public ResponseEntity<?> putProjectRelationShip(@RequestBody final Relationship relationship,
+            @PathVariable("project-name") final String projectName, final HttpServletRequest request) {
+
+        LOGGER.info("adding relationship for project-name: {} ...", projectName);
+
+        if (relationship.getRelatedLink() != null) {
+            final String targetBaseUrl = HttpServiceUtils.getBaseUrl(request).toString();
+            final HttpHeaders incomingHeader = getHeaders(request);
+
+            final boolean result = cacheServiceProvider.addRelationShip(incomingHeader, targetBaseUrl,
+                    request.getRequestURI(), projectName, relationship);
+            if (result) {
+                LOGGER.info("added created bi directional relationship with {}", relationship.getRelatedLink());
+                return ResponseEntity.accepted().build();
+            }
+        }
+
+        LOGGER.error("Unable to add relationship for related link: {}", relationship.getRelatedLink());
+        return getRequestErrorResponseEntity(request);
+    }
+
+}