Adding API Mapping infrastructure

Issue-ID: LOG-391
Change-Id: I30d954bcdf1cf0748bb5249cbf10defb8dbc8ff6
Signed-off-by: Geora Barsky <georab@amdocs.com>

8 files changed, 568 insertions, 27 deletions

diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/Application.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/Application.java
index e0ebfc8..93dd886 100644
--- a/src/main/java/org/onap/pomba/contextbuilder/sdnc/Application.java
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/Application.java
@@ -18,7 +18,13 @@
 
 package org.onap.pomba.contextbuilder.sdnc;
 
-import org.apache.velocity.app.VelocityEngine;
+import org.kie.api.KieServices;
+import org.kie.api.builder.KieBuilder;
+import org.kie.api.builder.KieFileSystem;
+import org.kie.api.builder.KieRepository;
+import org.kie.api.io.Resource;
+import org.kie.api.io.ResourceType;
+import org.kie.api.runtime.KieContainer;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
@@ -30,8 +36,10 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.scheduling.annotation.EnableAsync;
 
+import java.io.File;
+
 @SpringBootApplication
-@ComponentScan(basePackages = "org.onap.pomba.contextbuilder.sdnc")
+@ComponentScan(basePackages = {"org.onap.pomba.contextbuilder.sdnc","org.kie.api"})
 @EnableAsync
 @EnableAutoConfiguration(exclude = { DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class })
 public class Application extends SpringBootServletInitializer {
@@ -45,9 +53,18 @@ public class Application extends SpringBootServletInitializer {
     }
 
     @Bean
-    public VelocityEngine velocityEngine() {
-        VelocityEngine velocityEngine =  new VelocityEngine();
-        velocityEngine.init();
-        return velocityEngine;
+    public KieContainer kieContainer() {
+
+        KieServices kServices = KieServices.Factory.get();
+        KieFileSystem kfs = kServices.newKieFileSystem();
+        KieRepository kr = kServices.getRepository();
+        File file = new File("config/rules/api-mapping-rules.drl");
+        Resource resource = kServices.getResources().newFileSystemResource(file).setResourceType(ResourceType.DRL);
+        kfs.write(resource);
+
+        KieBuilder kb = kServices.newKieBuilder(kfs);
+        kb.buildAll();
+        KieContainer kContainer = kServices.newKieContainer(kr.getDefaultReleaseId());
+        return kContainer;
     }
 }
\ No newline at end of file
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/SdncConfiguration.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/SdncConfiguration.java
index ec5c8b3..71c3502 100644
--- a/src/main/java/org/onap/pomba/contextbuilder/sdnc/SdncConfiguration.java
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/SdncConfiguration.java
@@ -24,7 +24,7 @@ import org.eclipse.jetty.util.security.Password;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.stereotype.Component;
-
+import org.onap.aai.restclient.client.RestClient;
 
 @Component
 @ApplicationPath("/")
@@ -70,5 +70,72 @@ public class SdncConfiguration {
         return ("Basic " + Base64.getEncoder().encodeToString(auth.getBytes()));
     }
 
+    /* AAI related interfaces */
+    @Value("${aai.serviceName}")
+    private String aaiHost;
+    @Value("${aai.servicePort}")
+    private String aaiPort;
+    @Value("${aai.username}")
+    private String aaiUsername;
+    @Value("${aai.password}")
+    private String aaiPassword;
+    @Value("${aai.httpProtocol}")
+    private String aaiHttpProtocol;
+    @Value("${aai.connectionTimeout}")
+    private Integer aaiConnectionTimeout;
+    @Value("${aai.readTimeout}")
+    private Integer aaiReadTimeout;
+
+    @Value("${aai.http.userId}")
+    private String aaiHttpUserId;
+
+    @Value("${aai.http.password}")
+    private String aaiHttpPassword;
+
+    @Value("${aai.searchNodeQuery}")
+    private String aaiSearchNodeQuery;
+
+    @Value("${aai.customerQuery}")
+    private String aaiCustomerQuery;
+
+    @Bean(name="aaiHttpBasicAuthorization")
+    public String getHttpBasicAuth() {
+        String auth = new String(this.aaiHttpUserId + ":" + Password.deobfuscate(this.aaiHttpPassword));
+
+        String encodedAuth =  Base64.getEncoder().encodeToString(auth.getBytes());
+        return ("Basic " + encodedAuth);
+    }
+
+    @Bean(name="aaiBasicAuthorization")
+    public String getAAIBasicAuth() {
+        String auth = new String(this.aaiUsername + ":" + Password.deobfuscate(this.aaiPassword));
+        String encodedAuth =  Base64.getEncoder().encodeToString(auth.getBytes());
+        return ("Basic " + encodedAuth);
+    }
+
+    @Bean(name="aaiClient")
+    public RestClient restClient() {
+        RestClient restClient = new RestClient();
+        restClient.validateServerHostname(false).validateServerCertChain(false).connectTimeoutMs(aaiConnectionTimeout).readTimeoutMs(aaiReadTimeout);
+        restClient.basicAuthUsername(aaiUsername);
+        restClient.basicAuthPassword(Password.deobfuscate(aaiPassword));
+        return restClient;
+    }
+
+    @Bean(name="aaiBaseUrl")
+    public String getAaiURL() {
+        return httpProtocol + "://" + aaiHost + ":" + aaiPort;
+
+    }
+
+    @Bean(name="aaiPathToSearchNodeQuery")
+    public String getAaiPathToSearchNodeQuery() {
+        return aaiSearchNodeQuery.trim();
+    }
+
+    @Bean(name="aaiPathToCustomerQuery")
+    public String getAaiPathToCustomerQuery() {
+        return aaiCustomerQuery.trim();
+    }
 
 }
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/SpringXMLConfig.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/SpringXMLConfig.java
new file mode 100644
index 0000000..db38754
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/SpringXMLConfig.java
@@ -0,0 +1,28 @@
+/**
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=====================================================
+ */
+package org.onap.pomba.contextbuilder.sdnc;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.ImportResource;
+
+@Configuration
+@ImportResource({"file:${service.xml.beans}"})
+public class SpringXMLConfig {
+
+
+}
\ No newline at end of file
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/handlers/GenericResourceApiHandler.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/handlers/GenericResourceApiHandler.java
new file mode 100644
index 0000000..885c923
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/handlers/GenericResourceApiHandler.java
@@ -0,0 +1,68 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=====================================================
+ */
+
+package org.onap.pomba.contextbuilder.sdnc.handlers;
+
+import org.apache.camel.Exchange;
+import org.onap.pomba.common.datatypes.ModelContext;
+import org.onap.pomba.contextbuilder.sdnc.exception.AuditException;
+import org.onap.pomba.contextbuilder.sdnc.model.ServiceEntity;
+import org.onap.pomba.contextbuilder.sdnc.util.RestUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import javax.ws.rs.client.Client;
+
+@Component
+public class GenericResourceApiHandler {
+
+    private static Logger log = LoggerFactory.getLogger(GenericResourceApiHandler.class);
+    @Autowired
+    private Client jerseyClient;
+    @Autowired
+    private String sdncBaseUrl;
+    @Autowired
+    private String sdncBasicAuthorization;
+    @Autowired
+    private String sdncGenericResourcePath;
+
+
+
+    public ModelContext process(Exchange exchange) throws Exception {
+
+        ModelContext context;
+        log.info("in GENERIC-RESOURCE-API HANDLER: ");
+
+        ServiceEntity serviceEntity = (ServiceEntity)exchange.getIn().getBody();
+        String serviceInstanceId = serviceEntity.getServiceInstanceId();
+
+        try {
+            String sdncResponse = RestUtil.getSdncGenericResource(jerseyClient, sdncBaseUrl, sdncBasicAuthorization, sdncGenericResourcePath, serviceInstanceId);
+            context = RestUtil.transform(sdncResponse);
+        } catch (AuditException ae) {
+            throw ae;
+        } catch (Exception e) {
+            throw new AuditException(e.getLocalizedMessage());
+        }
+
+        return context;
+    }
+
+}
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/handlers/VnfApiHandler.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/handlers/VnfApiHandler.java
new file mode 100644
index 0000000..bfedf69
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/handlers/VnfApiHandler.java
@@ -0,0 +1,52 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=====================================================
+ */
+
+package org.onap.pomba.contextbuilder.sdnc.handlers;
+
+import org.apache.camel.Exchange;
+import org.onap.pomba.common.datatypes.ModelContext;
+import org.onap.pomba.common.datatypes.Service;
+import org.onap.pomba.contextbuilder.sdnc.model.ServiceEntity;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+
+@Component
+public class VnfApiHandler {
+
+    private static Logger log = LoggerFactory.getLogger(VnfApiHandler.class);
+
+    public ModelContext process(Exchange exchange) throws Exception {
+
+        log.info("in VNF-API HANDLER: ");
+
+//  dummy population of the model context
+// The following lines should be replaced with the logic of calling to SDN-C VNF-API
+// and transforming the response into common model
+        ModelContext context = new ModelContext();
+        Service service = new Service();
+        ServiceEntity serviceEntity = (ServiceEntity)exchange.getIn().getBody();
+        service.setName( serviceEntity.getServiceType() + " service instance");
+        context.setService(service);
+// end dummy code
+
+        return context;
+    }
+
+
+}
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/model/ServiceEntity.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/model/ServiceEntity.java
new file mode 100644
index 0000000..2f08533
--- /dev/null
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/model/ServiceEntity.java
@@ -0,0 +1,73 @@
+/*
+ * ============LICENSE_START===================================================
+ * Copyright (c) 2018 Amdocs
+ * ============================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=====================================================
+ */
+package org.onap.pomba.contextbuilder.sdnc.model;
+
+public class ServiceEntity {
+
+    private String customerType;
+    private String customerName;
+    private String serviceType;
+    private String apiName;
+    private String serviceInstanceId;
+    private String customerId;
+
+    public String getCustomerId() {
+        return customerId;
+    }
+
+    public void setCustomerId(String customerId) {
+        this.customerId = customerId;
+    }
+
+    public String getServiceInstanceId() { return serviceInstanceId; }
+
+    public void setServiceInstanceId(String serviceInstanceId) { this.serviceInstanceId = serviceInstanceId; }
+
+    public String getCustomerType() {
+        return customerType;
+    }
+
+    public void setCustomerType(String customerType) {
+        this.customerType = customerType;
+    }
+
+    public String getCustomerName() {
+        return customerName;
+    }
+
+    public void setCustomerName(String customerName) {
+        this.customerName = customerName;
+    }
+
+    public String getServiceType() {
+        return serviceType;
+    }
+
+    public void setServiceType(String serviceType) {
+        this.serviceType = serviceType;
+    }
+
+    public String getApiName() {
+        return apiName;
+    }
+
+    public void setApiName(String apiName) {
+        this.apiName = apiName;
+    }
+
+}
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/SpringServiceImpl.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/SpringServiceImpl.java
index daf6bf8..b19c24c 100644
--- a/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/SpringServiceImpl.java
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/service/SpringServiceImpl.java
@@ -18,57 +18,82 @@
 
 package org.onap.pomba.contextbuilder.sdnc.service;
 
-import javax.ws.rs.client.Client;
+import org.apache.camel.ProducerTemplate;
+import org.kie.api.runtime.KieContainer;
+import org.kie.api.runtime.KieSession;
 import org.onap.pomba.common.datatypes.ModelContext;
 import org.onap.pomba.contextbuilder.sdnc.exception.AuditException;
 import org.onap.pomba.contextbuilder.sdnc.service.rs.RestService;
-import org.onap.pomba.contextbuilder.sdnc.util.RestUtil;
+import org.onap.pomba.contextbuilder.sdnc.model.ServiceEntity;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.onap.pomba.contextbuilder.sdnc.util.RestUtil;
+import org.onap.aai.restclient.client.RestClient;
 
 @Service
 public class SpringServiceImpl implements SpringService {
     private static Logger log = LoggerFactory.getLogger(RestService.class);
 
     @Autowired
-    private Client jerseyClient;
+    private String sdncCtxBuilderBasicAuthorization;
+    private KieContainer kieContainer;
     @Autowired
-    private String sdncBaseUrl;
+    private ProducerTemplate producerTemplate;
+
+    //AAI related
     @Autowired
-    private String sdncBasicAuthorization;
+    private String aaiBasicAuthorization;
     @Autowired
-    private String sdncGenericResourcePath;
+    private RestClient aaiClient;
     @Autowired
-    private String sdncCtxBuilderBasicAuthorization;
+    private String aaiBaseUrl;
+    @Autowired
+    private String aaiPathToSearchNodeQuery;
+    @Autowired
+    private String aaiPathToCustomerQuery;
 
     public SpringServiceImpl() {
         // needed for instantiation
     }
 
+    @Autowired
+    public SpringServiceImpl(KieContainer kieContainer) {
+        this.kieContainer = kieContainer;
+
+    }
 
     @Override
     public ModelContext getContext(String serviceInstanceId, String transactionId) throws AuditException {
         ModelContext context = null;
-        String url = "serviceInstanceId=" + serviceInstanceId + " transactionId=" + transactionId;
-        log.info("URL Query the SDN-C model data with URL: " , url);
-
-        // Retrieve the service instance information from SDNC and AAI
-        try {
-            String sdncResponse = RestUtil.getSdncGenericResource(jerseyClient, sdncBaseUrl, sdncBasicAuthorization, sdncGenericResourcePath, serviceInstanceId);
-            log.info("sdncResponse: ", sdncResponse);
-            context = RestUtil.transform(sdncResponse);
-        } catch (AuditException ae) {
-            throw ae;
-        } catch (Exception e) {
-            throw new AuditException(e.getLocalizedMessage());
-        }
+
+        // Call AAI system to populate ServiceData
+        ServiceEntity serviceEntity = RestUtil.getServiceEntity(aaiClient, aaiBaseUrl, aaiBasicAuthorization, aaiPathToSearchNodeQuery, aaiPathToCustomerQuery, serviceInstanceId, transactionId);
+
+        processApiMappingRules(serviceEntity);
+        log.info("SDN-C determined API: " + serviceEntity.getApiName());
+
+        context = producerTemplate.requestBody("direct:startRoutingProcess", serviceEntity, ModelContext.class);
+
         return context;
     }
 
+    private void processApiMappingRules(ServiceEntity serviceData){
+
+        KieSession kieSession = kieContainer.newKieSession();
+        log.info ("KIE Session is created");
+        kieSession.insert(serviceData);
+        kieSession.fireAllRules();
+        log.info("Rules are fired");
+        kieSession.getFactHandles().forEach(fh -> kieSession.delete(fh));
+        kieSession.dispose();
+    }
+
     public String getSdncAuthoriztion() {
         return sdncCtxBuilderBasicAuthorization;
     }
 
+
+
 }
diff --git a/src/main/java/org/onap/pomba/contextbuilder/sdnc/util/RestUtil.java b/src/main/java/org/onap/pomba/contextbuilder/sdnc/util/RestUtil.java
index 806514c..8701c89 100644
--- a/src/main/java/org/onap/pomba/contextbuilder/sdnc/util/RestUtil.java
+++ b/src/main/java/org/onap/pomba/contextbuilder/sdnc/util/RestUtil.java
@@ -34,6 +34,16 @@ import org.onap.pomba.contextbuilder.sdnc.exception.AuditException;
 import org.onap.pomba.contextbuilder.sdnc.service.rs.RestService;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.onap.aai.restclient.client.OperationResult;
+import org.onap.aai.restclient.client.RestClient;
+import javax.ws.rs.core.MediaType;
+import com.sun.jersey.core.util.MultivaluedMapImpl;
+import java.util.Map;
+import java.util.Collections;
+import javax.ws.rs.core.MultivaluedMap;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.onap.pomba.contextbuilder.sdnc.model.ServiceEntity;
 
 public class RestUtil {
 
@@ -46,6 +56,22 @@ public class RestUtil {
     public static final String FROM_APP_ID = "X-FromAppId";
     public static final String AUTHORIZATION = "Authorization";
 
+    // AAI related
+    private static final String APP_NAME = "sdncCtxBuilder";
+    private static final String EMPTY_JSON_STRING = "{}";
+    private static final String JSON_ATT_RESOURCE_TYPE = "resource-type";
+    private static final String JSON_ATT_RESOURCE_LINK = "resource-link";
+    private static final String RESULT_DATA = "result-data";
+    private static final String CATALOG_SERVICE_INSTANCE = "service-instance";
+    private static final String CUSTOMER_ID_STRING = "/customers/customer/";
+    private static final String SERVICE_TYPE_STRING = "/service-subscriptions/service-subscription/";
+    private static final String CUSTOMER = "customer";
+    private static final String JSON_ATT_GLOBAL_CUSTOMER_ID = "global-customer-id";
+    private static final String JSON_ATT_SUBSCRIBER_TYPE = "subscriber-type";
+    private static final String JSON_ATT_SUBSCRIBER_NAME = "subscriber-name";
+
+    private static final String FORWARD_SLASH = "/";
+
     // Parameters for Query SDNC Model Data REST API  URL
     private static final String SERVICE_INSTANCE_ID = "serviceInstanceId";
 
@@ -147,4 +173,189 @@ public class RestUtil {
         return MessageFormat.format(siPath, vfModuleLink);
     }
 
+    /**
+     * Get customer info from multiple AAI api
+     * @param aaiClient
+     * @param aaiBaseUrl
+     * @param aaiBasicAuthorization
+     * @param aaiPathToSearchNodeQuery
+     * @param aaiPathToCustomerQuery
+     * @param serviceInstaceId
+     * @param transactionId
+     * @return
+     * @throws AuditException
+     */
+    public static ServiceEntity getServiceEntity(RestClient aaiClient,
+                                                String aaiBaseUrl,
+                                                String aaiBasicAuthorization,
+                                                String aaiPathToSearchNodeQuery,
+                                                String aaiPathToCustomerQuery,
+                                                String serviceInstanceId,
+                                                String transactionId)throws AuditException {
+
+        String obtainResourceLink_url = generateUrl_ForResourceLink(aaiBaseUrl, aaiPathToSearchNodeQuery, serviceInstanceId);
+        String aaiResourceData  = getAaiResource(aaiClient, obtainResourceLink_url, aaiBasicAuthorization, transactionId, MediaType.valueOf(MediaType.APPLICATION_JSON));
+
+        // Handle the case if the service instance is not found in AAI
+        if (isEmptyJson(aaiResourceData)) {
+            log.info(" Service Instance {} is not found from AAI", serviceInstanceId);
+            // Only return the empty Json on the root level. i.e service instance
+            return null;
+        }
+
+        String resourceLink = extractResourceLinkBasedOnServiceInstance(aaiResourceData, CATALOG_SERVICE_INSTANCE);
+
+        ServiceEntity serviceEntityObj =  createServiceEntityObj (resourceLink); //customerId and serviceType are updated here.
+        if (serviceEntityObj != null) {
+           serviceEntityObj.setServiceInstanceId(serviceInstanceId);
+           String customerId = serviceEntityObj.getCustomerId();
+           // Obtain customerType and customerName
+           String obtainCustomer_url = generateUrl_ForCustomer (aaiBaseUrl, aaiPathToCustomerQuery, customerId);
+           String aaiCustomerData  = getAaiResource(aaiClient, obtainCustomer_url, aaiBasicAuthorization, transactionId, MediaType.valueOf(MediaType.APPLICATION_JSON));
+           if (isEmptyJson(aaiCustomerData)) {
+               log.info(" Customer name {} is not found from AAI", customerId);
+               // Only return the empty Json on the root level. i.e service instance
+               throw new AuditException(INTERNAL_SERVER_ERROR + ": Customer ID cannot be found from AAI :" + customerId);
+           }
+           // Update customerType and customerName to the existing serviceEntityObj
+           updateServiceEntityObj ( aaiCustomerData , serviceEntityObj);
+        }
+
+        return serviceEntityObj;
+    }
+
+    private static boolean isEmptyJson(String serviceInstancePayload) {
+        return (serviceInstancePayload.equals(EMPTY_JSON_STRING));
+    }
+
+    private static String generateUrl_ForResourceLink (String aaiBaseURL, String aaiPathToSearchNodeQuery ,String serviceInstanceId) {
+        return aaiBaseURL + aaiPathToSearchNodeQuery + serviceInstanceId;
+    }
+
+    private static String generateUrl_ForCustomer (String aaiBaseURL, String aaiPathToCustomerQuery ,String customerId) {
+        return aaiBaseURL + aaiPathToCustomerQuery + customerId;
+    }
+
+    @SuppressWarnings("unchecked")
+    private static Map<String, List<String>> buildHeaders(String aaiBasicAuthorization, String transactionId) {
+        MultivaluedMap<String, String> headers = new MultivaluedMapImpl();
+        headers.put(TRANSACTION_ID, Collections.singletonList(transactionId));
+        headers.put(FROM_APP_ID, Collections.singletonList(APP_NAME));
+        headers.put(AUTHORIZATION, Collections.singletonList(aaiBasicAuthorization));
+        return headers;
+    }
+
+    private static String getAaiResource(RestClient client, String url, String aaiBasicAuthorization, String transId, MediaType mediaType)
+            throws AuditException {
+        OperationResult result = client.get(url, buildHeaders(aaiBasicAuthorization, transId), MediaType.valueOf(MediaType.APPLICATION_JSON));
+
+        if (result.getResultCode() == 200) {
+            return result.getResult();
+        } else if (result.getResultCode() == 404) {
+            // Resource not found, generate empty JSON format
+            log.info("Resource for {} is not found: {}", url, "return empty Json format");
+            return new JSONObject().toString();
+
+        } else {
+            throw new AuditException(INTERNAL_SERVER_ERROR + " with " + result.getFailureCause());
+        }
+    }
+
+    /*
+     * Extract the resource-Link from Json payload. For example
+     * {
+     *     "result-data": [
+     *         {
+     *             "resource-type": "service-instance",
+     *             "resource-link": "/aai/v11/business/customers/customer/DemoCust_651800ed-2a3c-45f5-b920-85c1ed155fc2/service-subscriptions/service-subscription/vFW/service-instances/service-instance/adc3cc2a-c73e-414f-8ddb-367de81300cb"
+     *         }
+     *     ]
+     * }
+     */
+    private static String extractResourceLinkBasedOnServiceInstance(String payload, String catalog) throws AuditException {
+        String resourceLink = null;
+        log.info("Fetching the resource-link based on resource-type=" + catalog);
+
+        try {
+            JSONArray result_data_list = new JSONObject(payload).getJSONArray(RESULT_DATA);
+            if (result_data_list != null) {
+                for (int i = 0; i < result_data_list.length(); i++) {
+                    JSONObject obj = result_data_list.optJSONObject(i);
+                    if (obj.has(JSON_ATT_RESOURCE_TYPE) && (obj.getString(JSON_ATT_RESOURCE_TYPE).equals(catalog) ))  {
+                        resourceLink = obj.getString(JSON_ATT_RESOURCE_LINK);
+                        log.info(resourceLink);
+                        return resourceLink;
+                    }
+                }
+            }
+        } catch (JSONException e) {
+            log.error(e.getMessage());
+            throw new AuditException("Json Reader Parse Error " + e.getMessage());
+        }
+
+        log.warn("resource-link CANNOT be found: ", payload );
+
+        return resourceLink;
+    }
+
+    /*
+     * Extract the "subscriber-name" and "subscriber-type" from Json payload. For example
+     *         {
+     *             "global-customer-id": "OttoonMorph36",
+     *             "subscriber-name": "OttoonMorph36",
+     *             "subscriber-type": "CUST",
+     *             "resource-version": "1526324315029"
+     *         }
+     */
+    private static void updateServiceEntityObj(String payload,  ServiceEntity serviceEntityObj) throws AuditException {
+        if (serviceEntityObj == null ) {
+            throw new AuditException("null pointer  serviceEntityObj");
+        }
+        String customerId = serviceEntityObj.getCustomerId();
+        log.info("Fetching the subscriber type based on customer-id = " + customerId);
+
+        try {
+            JSONObject obj = new JSONObject (payload);
+            if (obj.has(JSON_ATT_GLOBAL_CUSTOMER_ID) && (obj.getString(JSON_ATT_GLOBAL_CUSTOMER_ID).equals(customerId) ))  {
+                serviceEntityObj.setCustomerType(obj.getString(JSON_ATT_SUBSCRIBER_TYPE));
+                serviceEntityObj.setCustomerName(obj.getString(JSON_ATT_SUBSCRIBER_NAME));
+                return;
+            }
+        } catch (JSONException e) {
+            log.error(e.getMessage());
+            throw new AuditException("Json Reader Parse Error " + e.getMessage());
+        }
+
+        log.warn("subscriberType (" + customerId + ") CANNOT be found: ", payload );
+
+        return;
+    }
+
+    /* Look for "/customers/customer/" and "/service-subscriptions/service-subscription/" in resourceLink
+     * and find the customer id and service type.
+     * For example,
+     *    "/aai/v11/business/customers/customer/DemoCust_651800ed-2a3c-45f5-b920-85c1ed155fc2/service-subscriptions/service-subscription/vFW/service-instances/service-instance/adc3cc2a-c73e-414f-8ddb-367de81300cb"
+     *    customerId = DemoCust_651800ed-2a3c-45f5-b920-85c1ed155fc2
+     *    serviceType = vFW
+     * */
+
+    private static ServiceEntity createServiceEntityObj (String resourceLink) {
+        int customer_id_idx = resourceLink.indexOf(CUSTOMER_ID_STRING);
+        int service_type_idx = resourceLink.indexOf(SERVICE_TYPE_STRING);
+
+        if (( customer_id_idx < 0 ) || ( service_type_idx < 0 )) {
+           return null;
+        }
+
+        ServiceEntity serviceEntity = new ServiceEntity ();
+        serviceEntity.setCustomerId(abstractStrInfo(resourceLink, CUSTOMER_ID_STRING));
+        serviceEntity.setServiceType(abstractStrInfo(resourceLink, SERVICE_TYPE_STRING));
+        return serviceEntity;
+    }
+
+    private static String abstractStrInfo (String origStr, String matchStr) {
+        String after = origStr.substring( origStr.indexOf(matchStr) + matchStr.length());
+
+        return after.substring(0, after.indexOf(FORWARD_SLASH));
+    }
 }