Get policy in CsarInstaller

Get the policies on the PEF engine when installing the CSAR (if needed)

Issue-ID: CLAMP-518
Change-Id: I2cca157821c22ef63dc748984140287667cc4663
Signed-off-by: sebdet <sebastien.determe@intl.att.com>

17 files changed, 438 insertions, 328 deletions

diff --git a/src/main/java/org/onap/clamp/clds/client/PolicyEngineServices.java b/src/main/java/org/onap/clamp/clds/client/PolicyEngineServices.java
new file mode 100644
index 00000000..d99e9b56
--- /dev/null
+++ b/src/main/java/org/onap/clamp/clds/client/PolicyEngineServices.java
@@ -0,0 +1,110 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP CLAMP
+ * ================================================================================
+ * Copyright (C) 2020 AT&T Intellectual Property. All rights
+ *                             reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END============================================
+ * ===================================================================
+ *
+ */
+
+package org.onap.clamp.clds.client;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+
+import org.apache.camel.CamelContext;
+import org.apache.camel.Exchange;
+import org.apache.camel.builder.ExchangeBuilder;
+import org.onap.clamp.clds.config.ClampProperties;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+/**
+ * The class implements the communication with the Policy Engine to retrieve
+ * policy models (tosca). It mainly delegates the physical calls to Camel
+ * engine.
+ *
+ */
+@Component
+public class PolicyEngineServices {
+    private final CamelContext camelContext;
+
+    private final ClampProperties refProp;
+
+    protected static final EELFLogger logger = EELFManager.getInstance().getLogger(PolicyEngineServices.class);
+    protected static final EELFLogger auditLogger = EELFManager.getInstance().getAuditLogger();
+    protected static final EELFLogger metricsLogger = EELFManager.getInstance().getMetricsLogger();
+    public static final String POLICY_RETRY_INTERVAL = "policy.retry.interval";
+    public static final String POLICY_RETRY_LIMIT = "policy.retry.limit";
+
+    @Autowired
+    public PolicyEngineServices(CamelContext camelContext, ClampProperties refProp) {
+        this.refProp = refProp;
+        this.camelContext = camelContext;
+    }
+
+    private void downloadAllPolicies() {
+        /*
+         * Exchange myCamelExchange = ExchangeBuilder.anExchange(camelContext)
+         * .withProperty("blueprintResourceId",
+         * resourceUuid).withProperty("blueprintServiceId", serviceUuid)
+         * .withProperty("blueprintName", artifactName).build();
+         * metricsLogger.info("Attempt n°" + i + " to contact DCAE inventory");
+         * 
+         * Exchange exchangeResponse =
+         * camelContext.createProducerTemplate().send("direct:get-all-policy-models",
+         * myCamelExchange);
+         */
+    }
+
+    /**
+     * This method can be used to download a policy tosca model on the engine.
+     * 
+     * @param policyType    The policy type (id)
+     * @param policyVersion The policy version
+     * @return A string with the whole policy tosca model
+     * @throws InterruptedException in case of issue when sleeping during the retry
+     */
+    public String downloadOnePolicy(String policyType, String policyVersion) throws InterruptedException {
+        int retryInterval = 0;
+        int retryLimit = 1;
+        if (refProp.getStringValue(POLICY_RETRY_LIMIT) != null) {
+            retryLimit = Integer.valueOf(refProp.getStringValue(POLICY_RETRY_LIMIT));
+        }
+        if (refProp.getStringValue(POLICY_RETRY_INTERVAL) != null) {
+            retryInterval = Integer.valueOf(refProp.getStringValue(POLICY_RETRY_INTERVAL));
+        }
+        for (int i = 0; i < retryLimit; i++) {
+            Exchange paramExchange = ExchangeBuilder.anExchange(camelContext)
+                    .withProperty("policyModelName", policyType).withProperty("policyModelVersion", policyVersion)
+                    .build();
+
+            Exchange exchangeResponse = camelContext.createProducerTemplate().send("direct:get-policy-model",
+                    paramExchange);
+
+            if (Integer.valueOf(200).equals(exchangeResponse.getIn().getHeader("CamelHttpResponseCode"))) {
+                return (String) exchangeResponse.getIn().getBody();
+            } else {
+                logger.info("Policy " + retryInterval + "ms before retrying ...");
+                // wait for a while and try to connect to DCAE again
+                Thread.sleep(retryInterval);
+            }
+        }
+        return "";
+    }
+
+}
diff --git a/src/main/java/org/onap/clamp/clds/config/ClampProperties.java b/src/main/java/org/onap/clamp/clds/config/ClampProperties.java
index 9905585d..8eae9066 100644
--- a/src/main/java/org/onap/clamp/clds/config/ClampProperties.java
+++ b/src/main/java/org/onap/clamp/clds/config/ClampProperties.java
@@ -23,13 +23,11 @@
 
 package org.onap.clamp.clds.config;
 
-import com.google.common.base.Splitter;
-
 import com.google.gson.JsonElement;
+
 import java.io.IOException;
 import java.net.URL;
 import java.nio.charset.StandardCharsets;
-import java.util.List;
 
 import org.apache.commons.io.IOUtils;
 import org.onap.clamp.clds.util.JsonUtils;
@@ -53,8 +51,7 @@ public class ClampProperties {
     /**
      * get property value.
      *
-     * @param key
-     *        The first key
+     * @param key The first key
      * @return The string with the value
      */
     public String getStringValue(String key) {
@@ -65,10 +62,8 @@ public class ClampProperties {
      * get property value for a combo key (key1 + "." + key2). If not found just use
      * key1.
      *
-     * @param key1
-     *        The first key
-     * @param key2
-     *        The second key after a dot
+     * @param key1 The first key
+     * @param key2 The second key after a dot
      * @return The string with the value
      */
     public String getStringValue(String key1, String key2) {
@@ -83,17 +78,15 @@ public class ClampProperties {
      * Return json as objects that can be updated. The value obtained from the
      * clds-reference file will be used as a filename.
      *
-     * @param key
-     *        The key that will be used to access the clds-reference file
+     * @param key The key that will be used to access the clds-reference file
      * @return A jsonNode
-     * @throws IOException
-     *         In case of issues with the JSON parser
+     * @throws IOException In case of issues with the JSON parser
      */
     public JsonElement getJsonTemplate(String key) throws IOException {
         String fileReference = getStringValue(key);
         return (fileReference != null)
-            ? JsonUtils.GSON.fromJson(getFileContentFromPath(fileReference), JsonElement.class)
-            : null;
+                ? JsonUtils.GSON.fromJson(getFileContentFromPath(fileReference), JsonElement.class)
+                : null;
     }
 
     /**
@@ -101,30 +94,25 @@ public class ClampProperties {
      * "." + key2), otherwise default to just key1. The value obtained from the
      * clds-reference file will be used as a filename.
      *
-     * @param key1
-     *        The first key
-     * @param key2
-     *        The second key after a dot
+     * @param key1 The first key
+     * @param key2 The second key after a dot
      * @return A JsonNode
-     * @throws IOException
-     *         In case of issues with the JSON parser
+     * @throws IOException In case of issues with the JSON parser
      */
     public JsonElement getJsonTemplate(String key1, String key2) throws IOException {
         String fileReference = getStringValue(key1, key2);
         return (fileReference != null)
-            ? JsonUtils.GSON.fromJson(getFileContentFromPath(fileReference), JsonElement.class)
-            : null;
+                ? JsonUtils.GSON.fromJson(getFileContentFromPath(fileReference), JsonElement.class)
+                : null;
     }
 
     /**
      * Return the file content. The value obtained from the clds-reference file will
      * be used as a filename.
      *
-     * @param key
-     *        The key that will be used to access the clds-reference file
+     * @param key The key that will be used to access the clds-reference file
      * @return File content in String
-     * @throws IOException
-     *         In case of issues with the JSON parser
+     * @throws IOException In case of issues with the JSON parser
      */
     public String getFileContent(String key) throws IOException {
         String fileReference = getStringValue(key);
@@ -136,13 +124,10 @@ public class ClampProperties {
      * otherwise default to just key1. The value obtained from the clds-reference
      * file will be used as a filename.
      *
-     * @param key1
-     *        The first key
-     * @param key2
-     *        The second key after a dot
+     * @param key1 The first key
+     * @param key2 The second key after a dot
      * @return File content in String
-     * @throws IOException
-     *         In case of issues with the JSON parser
+     * @throws IOException In case of issues with the JSON parser
      */
     public String getFileContent(String key1, String key2) throws IOException {
         String fileReference = getStringValue(key1, key2);
@@ -153,18 +138,4 @@ public class ClampProperties {
         URL url = appContext.getResource(filepath).getURL();
         return IOUtils.toString(url, StandardCharsets.UTF_8);
     }
-
-    /**
-     * Returns the list of strings split with separator.
-     *
-     * @param key
-     *        property key
-     * @param separator
-     *        property value separator
-     * @return List of Strings split with a separator
-     */
-    public List<String> getStringList(String key, String separator) {
-        return Splitter.on(separator).trimResults().omitEmptyStrings()
-            .splitToList(env.getProperty(CONFIG_PREFIX + key));
-    }
 }
diff --git a/src/main/java/org/onap/clamp/clds/config/PolicyConfiguration.java b/src/main/java/org/onap/clamp/clds/config/PolicyConfiguration.java
deleted file mode 100644
index a4f37e8b..00000000
--- a/src/main/java/org/onap/clamp/clds/config/PolicyConfiguration.java
+++ /dev/null
@@ -1,133 +0,0 @@
-/*-
- * ============LICENSE_START=======================================================
- * ONAP CLAMP
- * ================================================================================
- * Copyright (C) 2018 AT&T Intellectual Property. All rights
- *                             reserved.
- * ================================================================================
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- * ============LICENSE_END============================================
- * ===================================================================
- * 
- */
-
-package org.onap.clamp.clds.config;
-
-import java.util.Properties;
-
-import org.springframework.boot.context.properties.ConfigurationProperties;
-import org.springframework.stereotype.Component;
-
-@Component
-@ConfigurationProperties(prefix = "clamp.config.policy")
-public class PolicyConfiguration {
-
-    public static final String PDP_URL1 = "PDP_URL1";
-    public static final String PDP_URL2 = "PDP_URL2";
-    public static final String PAP_URL = "PAP_URL";
-    public static final String NOTIFICATION_TYPE = "NOTIFICATION_TYPE";
-    public static final String NOTIFICATION_UEB_SERVERS = "NOTIFICATION_UEB_SERVERS";
-    public static final String CLIENT_ID = "CLIENT_ID";
-    public static final String CLIENT_KEY = "CLIENT_KEY";
-    public static final String ENVIRONMENT = "ENVIRONMENT";
-    private String pdpUrl1;
-    private String pdpUrl2;
-    private String papUrl;
-    private String notificationType;
-    private String notificationUebServers;
-    private String clientId;
-    private String clientKey;
-    private String policyEnvironment;
-
-    public String getPdpUrl1() {
-        return pdpUrl1;
-    }
-
-    public void setPdpUrl1(String pdpUrl1) {
-        this.pdpUrl1 = pdpUrl1;
-    }
-
-    public String getPdpUrl2() {
-        return pdpUrl2;
-    }
-
-    public void setPdpUrl2(String pdpUrl2) {
-        this.pdpUrl2 = pdpUrl2;
-    }
-
-    public String getPapUrl() {
-        return papUrl;
-    }
-
-    public void setPapUrl(String papUrl) {
-        this.papUrl = papUrl;
-    }
-
-    public String getNotificationType() {
-        return notificationType;
-    }
-
-    public void setNotificationType(String notificationType) {
-        this.notificationType = notificationType;
-    }
-
-    public String getNotificationUebServers() {
-        return notificationUebServers;
-    }
-
-    public void setNotificationUebServers(String notificationUebServers) {
-        this.notificationUebServers = notificationUebServers;
-    }
-
-    public String getClientId() {
-        return clientId;
-    }
-
-    public void setClientId(String clientId) {
-        this.clientId = clientId;
-    }
-
-    public String getClientKey() {
-        return clientKey;
-    }
-
-    public void setClientKey(String clientKey) {
-        this.clientKey = clientKey;
-    }
-
-    public String getPolicyEnvironment() {
-        return policyEnvironment;
-    }
-
-    public void setPolicyEnvironment(String environment) {
-        this.policyEnvironment = environment;
-    }
-
-    /**
-     * Returns policy configuration properties.
-     *
-     * @return policy configuration properties
-     */
-    public Properties getProperties() {
-        Properties prop = new Properties();
-        prop.put(PDP_URL1, pdpUrl1);
-        prop.put(PDP_URL2, pdpUrl2);
-        prop.put(PAP_URL, papUrl);
-        prop.put(NOTIFICATION_TYPE, notificationType);
-        prop.put(NOTIFICATION_UEB_SERVERS, notificationUebServers);
-        prop.put(CLIENT_ID, clientId);
-        prop.put(CLIENT_KEY, clientKey);
-        prop.put(ENVIRONMENT, policyEnvironment);
-        return prop;
-    }
-}
diff --git a/src/main/java/org/onap/clamp/clds/config/spring/SdcControllerConfiguration.java b/src/main/java/org/onap/clamp/clds/config/spring/SdcControllerConfiguration.java
index 5a3e22a3..eca45d66 100644
--- a/src/main/java/org/onap/clamp/clds/config/spring/SdcControllerConfiguration.java
+++ b/src/main/java/org/onap/clamp/clds/config/spring/SdcControllerConfiguration.java
@@ -41,14 +41,12 @@ import org.onap.clamp.loop.CsarInstaller;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Profile;
 import org.springframework.scheduling.annotation.Scheduled;
 
 @Configuration
-@ComponentScan(basePackages = { "org.onap.clamp.loop", "org.onap.clamp.clds.config" })
-@Profile("clamp-sdc-controller-new")
+@Profile("clamp-sdc-controller")
 public class SdcControllerConfiguration {
 
     private static final EELFLogger logger = EELFManager.getInstance().getLogger(SdcControllerConfiguration.class);
diff --git a/src/main/java/org/onap/clamp/clds/exception/sdc/controller/BlueprintParserException.java b/src/main/java/org/onap/clamp/clds/exception/sdc/controller/BlueprintParserException.java
new file mode 100644
index 00000000..7257fd8a
--- /dev/null
+++ b/src/main/java/org/onap/clamp/clds/exception/sdc/controller/BlueprintParserException.java
@@ -0,0 +1,54 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP CLAMP
+ * ================================================================================
+ * Copyright (C) 2020 AT&T Intellectual Property. All rights
+ *                             reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License"); 
+ * you may not use this file except in compliance with the License. 
+ * You may obtain a copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software 
+ * distributed under the License is distributed on an "AS IS" BASIS, 
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+ * See the License for the specific language governing permissions and 
+ * limitations under the License.
+ * ============LICENSE_END============================================
+ * ===================================================================
+ * 
+ */
+
+package org.onap.clamp.clds.exception.sdc.controller;
+
+/**
+ * Exception during blueprint parsing.
+ */
+public class BlueprintParserException extends Exception {
+
+    /**
+     * Serial ID.
+     */
+    private static final long serialVersionUID = -3044162346353623199L;
+
+    /**
+     * This constructor can be used to create a new SdcDownloadException.
+     *
+     * @param message The message to dump
+     */
+    public BlueprintParserException(final String message) {
+        super(message);
+    }
+
+    /**
+     * This constructor can be used to create a new SdcDownloadException.
+     *
+     * @param message The message to dump
+     * @param cause   The Throwable cause object
+     */
+    public BlueprintParserException(final String message, final Throwable cause) {
+        super(message, cause);
+    }
+}
diff --git a/src/main/java/org/onap/clamp/clds/model/dcae/DcaeInventoryCache.java b/src/main/java/org/onap/clamp/clds/model/dcae/DcaeInventoryCache.java
index 19bc23d5..fc2ca5ca 100644
--- a/src/main/java/org/onap/clamp/clds/model/dcae/DcaeInventoryCache.java
+++ b/src/main/java/org/onap/clamp/clds/model/dcae/DcaeInventoryCache.java
@@ -46,7 +46,7 @@ public class DcaeInventoryCache {
     public void addDcaeInventoryResponse(DcaeInventoryResponse inventoryResponse) {
         Set<DcaeInventoryResponse> responsesSet = blueprintsMap.get(inventoryResponse.getAsdcServiceId());
         if (responsesSet == null) {
-            responsesSet = new TreeSet<DcaeInventoryResponse>();
+            responsesSet = new TreeSet<>();
             blueprintsMap.put(inventoryResponse.getAsdcServiceId(), responsesSet);
         }
         responsesSet.add(inventoryResponse);
diff --git a/src/main/java/org/onap/clamp/clds/sdc/controller/SdcSingleController.java b/src/main/java/org/onap/clamp/clds/sdc/controller/SdcSingleController.java
index bd18baea..fbb37d52 100644
--- a/src/main/java/org/onap/clamp/clds/sdc/controller/SdcSingleController.java
+++ b/src/main/java/org/onap/clamp/clds/sdc/controller/SdcSingleController.java
@@ -33,6 +33,7 @@ import java.util.concurrent.ThreadLocalRandom;
 
 import org.onap.clamp.clds.config.ClampProperties;
 import org.onap.clamp.clds.config.sdc.SdcSingleControllerConfiguration;
+import org.onap.clamp.clds.exception.sdc.controller.BlueprintParserException;
 import org.onap.clamp.clds.exception.sdc.controller.CsarHandlerException;
 import org.onap.clamp.clds.exception.sdc.controller.SdcArtifactInstallerException;
 import org.onap.clamp.clds.exception.sdc.controller.SdcControllerException;
@@ -290,6 +291,10 @@ public class SdcSingleController {
             sendAllNotificationForCsarHandler(notificationData, csar, NotificationType.DEPLOY,
                     DistributionStatusEnum.DEPLOY_ERROR, e.getMessage());
             Thread.currentThread().interrupt();
+        } catch (BlueprintParserException e) {
+            logger.error("BlueprintParser exception caught during the notification processing", e);
+            sendAllNotificationForCsarHandler(notificationData, csar, NotificationType.DEPLOY,
+                    DistributionStatusEnum.DEPLOY_ERROR, e.getMessage());
         } catch (RuntimeException e) {
             logger.error("Unexpected exception caught during the notification processing", e);
             sendAllNotificationForCsarHandler(notificationData, csar, NotificationType.DEPLOY,
diff --git a/src/main/java/org/onap/clamp/clds/sdc/controller/installer/MicroService.java b/src/main/java/org/onap/clamp/clds/sdc/controller/installer/BlueprintMicroService.java
index 68ac842c..e00ce943 100644
--- a/src/main/java/org/onap/clamp/clds/sdc/controller/installer/MicroService.java
+++ b/src/main/java/org/onap/clamp/clds/sdc/controller/installer/BlueprintMicroService.java
@@ -17,7 +17,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  * ============LICENSE_END============================================
- * Modifications copyright (c) 2019 AT&T
+ * Modifications copyright (c) 2019-2020 AT&T
  * ===================================================================
  *
  */
@@ -26,25 +26,24 @@ package org.onap.clamp.clds.sdc.controller.installer;
 
 import java.util.Objects;
 
-public class MicroService {
+public class BlueprintMicroService {
     private final String name;
     private final String modelType;
     private final String inputFrom;
-    private String mappedNameJpa;
+    private final String modelVersion;
 
     /**
      * The Micro service constructor.
      * 
-     * @param name          The name in String
-     * @param modelType     The model type
-     * @param inputFrom     Comes from (single chained)
-     * @param mappedNameJpa Name in database
+     * @param name      The name in String
+     * @param modelType The model type
+     * @param inputFrom Comes from (single chained)
      */
-    public MicroService(String name, String modelType, String inputFrom, String mappedNameJpa) {
+    public BlueprintMicroService(String name, String modelType, String inputFrom, String modelVersion) {
         this.name = name;
         this.inputFrom = inputFrom;
-        this.mappedNameJpa = mappedNameJpa;
         this.modelType = modelType;
+        this.modelVersion = modelVersion;
     }
 
     public String getName() {
@@ -59,18 +58,19 @@ public class MicroService {
         return inputFrom;
     }
 
-    @Override
-    public String toString() {
-        return "MicroService{" + "name='" + name + '\'' + ", modelType='" + modelType + '\'' + ", inputFrom='"
-                + inputFrom + '\'' + ", mappedNameJpa='" + mappedNameJpa + '\'' + '}';
-    }
-
-    public String getMappedNameJpa() {
-        return mappedNameJpa;
+    /**
+     * modelVerrsion getter.
+     * 
+     * @return the modelVersion
+     */
+    public String getModelVersion() {
+        return modelVersion;
     }
 
-    public void setMappedNameJpa(String mappedNameJpa) {
-        this.mappedNameJpa = mappedNameJpa;
+    @Override
+    public String toString() {
+        return "MicroService {" + "name='" + name + '\'' + ", modelType='" + modelType + '\'' + ", inputFrom='"
+                + inputFrom + '\'' + ", modelVersion='" + modelVersion + '\'' + '}';
     }
 
     @Override
@@ -81,13 +81,13 @@ public class MicroService {
         if (obj == null || getClass() != obj.getClass()) {
             return false;
         }
-        MicroService that = (MicroService) obj;
+        BlueprintMicroService that = (BlueprintMicroService) obj;
         return name.equals(that.name) && modelType.equals(that.modelType) && inputFrom.equals(that.inputFrom)
-                && mappedNameJpa.equals(that.mappedNameJpa);
+                && modelVersion.equals(that.modelVersion);
     }
 
     @Override
     public int hashCode() {
-        return Objects.hash(name, modelType, inputFrom, mappedNameJpa);
+        return Objects.hash(name, modelType, inputFrom, modelVersion);
     }
 }
diff --git a/src/main/java/org/onap/clamp/clds/sdc/controller/installer/BlueprintParser.java b/src/main/java/org/onap/clamp/clds/sdc/controller/installer/BlueprintParser.java
index 0dd231f0..981a2041 100644
--- a/src/main/java/org/onap/clamp/clds/sdc/controller/installer/BlueprintParser.java
+++ b/src/main/java/org/onap/clamp/clds/sdc/controller/installer/BlueprintParser.java
@@ -24,6 +24,8 @@
 
 package org.onap.clamp.clds.sdc.controller.installer;
 
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
 import com.google.gson.Gson;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
@@ -38,76 +40,74 @@ import java.util.Map.Entry;
 import java.util.Set;
 
 import org.json.JSONObject;
-import org.springframework.stereotype.Component;
+import org.onap.clamp.clds.exception.sdc.controller.BlueprintParserException;
 import org.yaml.snakeyaml.Yaml;
 
-@Component
 public class BlueprintParser {
 
     static final String TCA = "TCA";
-    static final String HOLMES = "Holmes";
-    private static final String TCA_POLICY = "tca_policy";
-    private static final String HOLMES_PREFIX = "holmes";
     private static final String NODE_TEMPLATES = "node_templates";
     private static final String DCAE_NODES = "dcae.nodes.";
+    private static final String DCAE_NODES_POLICY = "dcae.nodes.policy";
     private static final String TYPE = "type";
     private static final String PROPERTIES = "properties";
     private static final String NAME = "name";
     private static final String INPUT = "inputs";
     private static final String GET_INPUT = "get_input";
-    private static final String POLICY_MODELID = "policy_model_id";
+    private static final String POLICY_MODEL_ID = "policy_model_id";
+    private static final String POLICY_MODEL_VERSION = "policy_model_version";
     private static final String RELATIONSHIPS = "relationships";
     private static final String CLAMP_NODE_RELATIONSHIPS_GETS_INPUT_FROM = "clamp_node.relationships.gets_input_from";
     private static final String TARGET = "target";
+    public static final String DEFAULT_VERSION = "1.0.0";
+
+    private static final EELFLogger logger = EELFManager.getInstance().getLogger(BlueprintParser.class);
+
+    private BlueprintParser() {
+
+    }
 
     /**
      * Get all micro services from blueprint.
      * 
      * @param blueprintString the blueprint in a String
      * @return A set of MircoService
+     * @throws BlueprintParserException In case of issues with the parsing
      */
-    public Set<MicroService> getMicroServices(String blueprintString) {
-        Set<MicroService> microServices = new HashSet<>();
+    public static Set<BlueprintMicroService> getMicroServices(String blueprintString) throws BlueprintParserException {
+        Set<BlueprintMicroService> microServices = new HashSet<>();
         JsonObject blueprintJson = BlueprintParser.convertToJson(blueprintString);
         JsonObject nodeTemplateList = blueprintJson.get(NODE_TEMPLATES).getAsJsonObject();
         JsonObject inputList = blueprintJson.get(INPUT).getAsJsonObject();
 
         for (Entry<String, JsonElement> entry : nodeTemplateList.entrySet()) {
             JsonObject nodeTemplate = entry.getValue().getAsJsonObject();
-            if (nodeTemplate.get(TYPE).getAsString().contains(DCAE_NODES)) {
-                MicroService microService = getNodeRepresentation(entry, nodeTemplateList, inputList);
-                microServices.add(microService);
+            if (!nodeTemplate.get(TYPE).getAsString().contains(DCAE_NODES_POLICY)
+                    && nodeTemplate.get(TYPE).getAsString().contains(DCAE_NODES)) {
+                BlueprintMicroService microService = getNodeRepresentation(entry, nodeTemplateList, inputList);
+                if (!microService.getModelType().isBlank()) {
+                    microServices.add(microService);
+                } else {
+                    logger.warn("Microservice " + microService.getName()
+                            + " will NOT be used by CLAMP as the model type is not defined or has not been found");
+                }
             }
         }
-        microServices.removeIf(ms -> TCA_POLICY.equals(ms.getName()));
+        logger.debug("Those microservices have been found in the blueprint:" + microServices);
         return microServices;
     }
 
     /**
-     * Does a fallback to TCA or Holmes.
+     * Does a fallback to TCA.
      * 
-     * @param blueprintString the blueprint in a String
      * @return The list of microservices
      */
-    public List<MicroService> fallbackToOneMicroService(String blueprintString) {
-        JsonObject jsonObject = BlueprintParser.convertToJson(blueprintString);
-        JsonObject results = jsonObject.get(NODE_TEMPLATES).getAsJsonObject();
-        String theBiggestMicroServiceContent = "";
-        String theBiggestMicroServiceKey = "";
-        for (Entry<String, JsonElement> entry : results.entrySet()) {
-            String msAsString = entry.getValue().toString();
-            int len = msAsString.length();
-            if (len > theBiggestMicroServiceContent.length()) {
-                theBiggestMicroServiceContent = msAsString;
-                theBiggestMicroServiceKey = entry.getKey();
-            }
-        }
-        String msName = theBiggestMicroServiceKey.toLowerCase().contains(HOLMES_PREFIX) ? HOLMES : TCA;
-        return Collections
-                .singletonList(new MicroService(msName, "onap.policies.monitoring.cdap.tca.hi.lo.app", "", ""));
+    public static List<BlueprintMicroService> fallbackToOneMicroService() {
+        return Collections.singletonList(
+                new BlueprintMicroService(TCA, "onap.policies.monitoring.cdap.tca.hi.lo.app", "", DEFAULT_VERSION));
     }
 
-    String getName(Entry<String, JsonElement> entry) {
+    static String getName(Entry<String, JsonElement> entry) {
         String microServiceYamlName = entry.getKey();
         JsonObject ob = entry.getValue().getAsJsonObject();
         if (ob.has(PROPERTIES)) {
@@ -119,7 +119,7 @@ public class BlueprintParser {
         return microServiceYamlName;
     }
 
-    String getInput(Entry<String, JsonElement> entry) {
+    static String getInput(Entry<String, JsonElement> entry) {
         JsonObject ob = entry.getValue().getAsJsonObject();
         if (ob.has(RELATIONSHIPS)) {
             JsonArray relationships = ob.getAsJsonArray(RELATIONSHIPS);
@@ -133,51 +133,81 @@ public class BlueprintParser {
         return "";
     }
 
-    String findModelTypeInTargetArray(JsonArray jsonArray, JsonObject nodeTemplateList, JsonObject inputList) {
-        for (JsonElement elem : jsonArray) {
-            String modelType = getModelType(
-                    new AbstractMap.SimpleEntry<String, JsonElement>(elem.getAsJsonObject().get(TARGET).getAsString(),
-                            nodeTemplateList.get(elem.getAsJsonObject().get(TARGET).getAsString()).getAsJsonObject()),
-                    nodeTemplateList, inputList);
-            if (!modelType.isEmpty()) {
-                return modelType;
+    static String findPropertyInRelationshipsArray(String propertyName, JsonArray relationshipsArray,
+            JsonObject blueprintNodeTemplateList, JsonObject blueprintInputList) throws BlueprintParserException {
+        for (JsonElement elem : relationshipsArray) {
+            if (blueprintNodeTemplateList.get(elem.getAsJsonObject().get(TARGET).getAsString()) == null) {
+                throw new BlueprintParserException(
+                        "The Target mentioned in the blueprint is not a known entry in the blueprint: "
+                                + elem.getAsJsonObject().get(TARGET).getAsString());
+            } else {
+                String property = getPropertyValue(propertyName,
+                        new AbstractMap.SimpleEntry<String, JsonElement>(
+                                elem.getAsJsonObject().get(TARGET).getAsString(), blueprintNodeTemplateList
+                                        .get(elem.getAsJsonObject().get(TARGET).getAsString()).getAsJsonObject()),
+                        blueprintNodeTemplateList, blueprintInputList);
+                if (!property.isEmpty()) {
+                    return property;
+                }
             }
         }
         return "";
     }
 
-    String getModelType(Entry<String, JsonElement> entry, JsonObject nodeTemplateList, JsonObject inputList) {
-        JsonObject ob = entry.getValue().getAsJsonObject();
+    static String getDirectOrInputPropertyValue(String propertyName, JsonObject blueprintInputList,
+            JsonObject nodeTemplateContent) {
+        JsonObject properties = nodeTemplateContent.get(PROPERTIES).getAsJsonObject();
+        if (properties.has(propertyName)) {
+            if (properties.get(propertyName).isJsonObject()) {
+                // it's a blueprint parameter
+                return blueprintInputList
+                        .get(properties.get(propertyName).getAsJsonObject().get(GET_INPUT).getAsString())
+                        .getAsJsonObject().get("default").getAsString();
+            } else {
+                // It's a direct value
+                return properties.get(propertyName).getAsString();
+            }
+        }
+        return "";
+    }
+
+    static String getPropertyValue(String propertyName, Entry<String, JsonElement> nodeTemplateEntry,
+            JsonObject blueprintNodeTemplateList, JsonObject blueprintIputList) throws BlueprintParserException {
+        JsonObject nodeTemplateContent = nodeTemplateEntry.getValue().getAsJsonObject();
         // Search first in this node template
-        if (ob.has(PROPERTIES)) {
-            JsonObject properties = ob.get(PROPERTIES).getAsJsonObject();
-            if (properties.has(POLICY_MODELID)) {
-                if (properties.get(POLICY_MODELID).isJsonObject()) {
-                    // it's a blueprint parameter
-                    return inputList.get(properties.get(POLICY_MODELID).getAsJsonObject().get(GET_INPUT).getAsString())
-                            .getAsJsonObject().get("default").getAsString();
-                } else {
-                    // It's a direct value
-                    return properties.get(POLICY_MODELID).getAsString();
-                }
+        if (nodeTemplateContent.has(PROPERTIES)) {
+            String propValue = getDirectOrInputPropertyValue(propertyName, blueprintIputList, nodeTemplateContent);
+            if (!propValue.isBlank()) {
+                return propValue;
             }
         }
         // Or it's may be defined in a relationship
-        if (ob.has(RELATIONSHIPS)) {
-            return findModelTypeInTargetArray(ob.get(RELATIONSHIPS).getAsJsonArray(), nodeTemplateList, inputList);
+        if (nodeTemplateContent.has(RELATIONSHIPS)) {
+            return findPropertyInRelationshipsArray(propertyName,
+                    nodeTemplateContent.get(RELATIONSHIPS).getAsJsonArray(), blueprintNodeTemplateList,
+                    blueprintIputList);
         }
         return "";
     }
 
-    MicroService getNodeRepresentation(Entry<String, JsonElement> entry, JsonObject nodeTemplateList,
-            JsonObject inputList) {
-        String name = getName(entry);
-        String getInputFrom = getInput(entry);
-        String modelType = getModelType(entry, nodeTemplateList, inputList);
-        return new MicroService(name, modelType, getInputFrom, "");
+    static BlueprintMicroService getNodeRepresentation(Entry<String, JsonElement> nodeTemplateEntry,
+            JsonObject blueprintNodeTemplateList, JsonObject blueprintInputList) throws BlueprintParserException {
+        String modelIdFound = getPropertyValue(POLICY_MODEL_ID, nodeTemplateEntry, blueprintNodeTemplateList,
+                blueprintInputList);
+        String versionFound = getPropertyValue(POLICY_MODEL_VERSION, nodeTemplateEntry, blueprintNodeTemplateList,
+                blueprintInputList);
+        if (modelIdFound.isBlank()) {
+            logger.warn("policy_model_id is not defined for the node template:" + nodeTemplateEntry.getKey());
+        }
+        if (versionFound.isBlank()) {
+            logger.warn("policy_model_version is not defined (setting it to a default value) for the node template:"
+                    + nodeTemplateEntry.getKey());
+        }
+        return new BlueprintMicroService(getName(nodeTemplateEntry), modelIdFound, getInput(nodeTemplateEntry),
+                !versionFound.isBlank() ? versionFound : DEFAULT_VERSION);
     }
 
-    private String getTarget(JsonObject elementObject) {
+    private static String getTarget(JsonObject elementObject) {
         if (elementObject.has(TYPE) && elementObject.has(TARGET)
                 && elementObject.get(TYPE).getAsString().equals(CLAMP_NODE_RELATIONSHIPS_GETS_INPUT_FROM)) {
             return elementObject.get(TARGET).getAsString();
@@ -186,10 +216,7 @@ public class BlueprintParser {
     }
 
     private static JsonObject convertToJson(String yamlString) {
-        Yaml yaml = new Yaml();
-        Map<String, Object> map = yaml.load(yamlString);
-
-        JSONObject jsonObject = new JSONObject(map);
-        return new Gson().fromJson(jsonObject.toString(), JsonObject.class);
+        Map<String, Object> map = new Yaml().load(yamlString);
+        return new Gson().fromJson(new JSONObject(map).toString(), JsonObject.class);
     }
 }
diff --git a/src/main/java/org/onap/clamp/clds/sdc/controller/installer/ChainGenerator.java b/src/main/java/org/onap/clamp/clds/sdc/controller/installer/ChainGenerator.java
index 9e76cc93..2bd259c2 100644
--- a/src/main/java/org/onap/clamp/clds/sdc/controller/installer/ChainGenerator.java
+++ b/src/main/java/org/onap/clamp/clds/sdc/controller/installer/ChainGenerator.java
@@ -42,11 +42,11 @@ public class ChainGenerator {
      * @param input A set of microservices
      * @return The list of microservice chained
      */
-    public List<MicroService> getChainOfMicroServices(Set<MicroService> input) {
-        LinkedList<MicroService> returnList = new LinkedList<>();
+    public List<BlueprintMicroService> getChainOfMicroServices(Set<BlueprintMicroService> input) {
+        LinkedList<BlueprintMicroService> returnList = new LinkedList<>();
         if (preValidate(input)) {
-            LinkedList<MicroService> theList = new LinkedList<>();
-            for (MicroService ms : input) {
+            LinkedList<BlueprintMicroService> theList = new LinkedList<>();
+            for (BlueprintMicroService ms : input) {
                 insertNodeTemplateIntoChain(ms, theList);
             }
             if (postValidate(theList)) {
@@ -56,16 +56,16 @@ public class ChainGenerator {
         return returnList;
     }
 
-    private boolean preValidate(Set<MicroService> input) {
-        List<MicroService> noInputs = input.stream().filter(ms -> "".equals(ms.getInputFrom()))
+    private boolean preValidate(Set<BlueprintMicroService> input) {
+        List<BlueprintMicroService> noInputs = input.stream().filter(ms -> "".equals(ms.getInputFrom()))
                 .collect(Collectors.toList());
         return noInputs.size() == 1;
     }
 
-    private boolean postValidate(LinkedList<MicroService> microServices) {
+    private boolean postValidate(LinkedList<BlueprintMicroService> microServices) {
         for (int i = 1; i < microServices.size() - 1; i++) {
-            MicroService prev = microServices.get(i - 1);
-            MicroService current = microServices.get(i);
+            BlueprintMicroService prev = microServices.get(i - 1);
+            BlueprintMicroService current = microServices.get(i);
             if (!current.getInputFrom().equals(prev.getName())) {
                 return false;
             }
@@ -73,11 +73,11 @@ public class ChainGenerator {
         return true;
     }
 
-    private void insertNodeTemplateIntoChain(MicroService microServicetoInsert,
-            LinkedList<MicroService> chainOfMicroServices) {
+    private void insertNodeTemplateIntoChain(BlueprintMicroService microServicetoInsert,
+            LinkedList<BlueprintMicroService> chainOfMicroServices) {
         int insertIndex = 0;
         for (int i = 0; i < chainOfMicroServices.size(); i++) {
-            MicroService current = chainOfMicroServices.get(i);
+            BlueprintMicroService current = chainOfMicroServices.get(i);
             if (microServicetoInsert.getName().equals(current.getInputFrom())) {
                 insertIndex = i;
                 break;
diff --git a/src/main/java/org/onap/clamp/clds/util/drawing/ClampGraphBuilder.java b/src/main/java/org/onap/clamp/clds/util/drawing/ClampGraphBuilder.java
index 8ded0cb8..6ce89873 100755
--- a/src/main/java/org/onap/clamp/clds/util/drawing/ClampGraphBuilder.java
+++ b/src/main/java/org/onap/clamp/clds/util/drawing/ClampGraphBuilder.java
@@ -28,12 +28,12 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
 
-import org.onap.clamp.clds.sdc.controller.installer.MicroService;
+import org.onap.clamp.clds.sdc.controller.installer.BlueprintMicroService;
 
 public class ClampGraphBuilder {
     private String policy;
     private String collector;
-    private List<MicroService> microServices = new ArrayList<>();
+    private List<BlueprintMicroService> microServices = new ArrayList<>();
     private final Painter painter;
 
     public ClampGraphBuilder(Painter painter) {
@@ -50,12 +50,12 @@ public class ClampGraphBuilder {
         return this;
     }
 
-    public ClampGraphBuilder addMicroService(MicroService ms) {
+    public ClampGraphBuilder addMicroService(BlueprintMicroService ms) {
         microServices.add(ms);
         return this;
     }
 
-    public ClampGraphBuilder addAllMicroServices(List<MicroService> msList) {
+    public ClampGraphBuilder addAllMicroServices(List<BlueprintMicroService> msList) {
         microServices.addAll(msList);
         return this;
     }
diff --git a/src/main/java/org/onap/clamp/clds/util/drawing/Painter.java b/src/main/java/org/onap/clamp/clds/util/drawing/Painter.java
index af6caf93..d96c9e53 100755
--- a/src/main/java/org/onap/clamp/clds/util/drawing/Painter.java
+++ b/src/main/java/org/onap/clamp/clds/util/drawing/Painter.java
@@ -31,7 +31,7 @@ import java.awt.RenderingHints;
 import java.util.List;
 
 import org.apache.batik.svggen.SVGGraphics2D;
-import org.onap.clamp.clds.sdc.controller.installer.MicroService;
+import org.onap.clamp.clds.sdc.controller.installer.BlueprintMicroService;
 
 public class Painter {
     private final int canvasSize;
@@ -57,7 +57,7 @@ public class Painter {
         this.canvasSize = DEFALUT_CANVAS_SIZE;
     }
 
-    DocumentBuilder doPaint(String collector, List<MicroService> microServices, String policy) {
+    DocumentBuilder doPaint(String collector, List<BlueprintMicroService> microServices, String policy) {
         int numOfRectangles = 2 + microServices.size();
         int numOfArrows = numOfRectangles + 1;
         int baseLength = (canvasSize - 2 * CIRCLE_RADIUS) / (numOfArrows + numOfRectangles);
@@ -76,12 +76,12 @@ public class Painter {
         return ib.getDocumentBuilder();
     }
 
-    private void doTheActualDrawing(String collector, List<MicroService> microServices, String policy,
+    private void doTheActualDrawing(String collector, List<BlueprintMicroService> microServices, String policy,
             ImageBuilder ib) {
         ib.circle("start-circle", SLIM_LINE).arrow().rectangle(collector, RectTypes.COLECTOR, collector);
 
-        for (MicroService ms : microServices) {
-            ib.arrow().rectangle(ms.getMappedNameJpa(), RectTypes.MICROSERVICE, ms.getName());
+        for (BlueprintMicroService ms : microServices) {
+            ib.arrow().rectangle(ms.getModelType(), RectTypes.MICROSERVICE, ms.getName());
         }
 
         ib.arrow().rectangle(policy, RectTypes.POLICY, policy).arrow().circle("stop-circle", THICK_LINE);
diff --git a/src/main/java/org/onap/clamp/clds/util/drawing/SvgFacade.java b/src/main/java/org/onap/clamp/clds/util/drawing/SvgFacade.java
index ae0c1729..251f4886 100644
--- a/src/main/java/org/onap/clamp/clds/util/drawing/SvgFacade.java
+++ b/src/main/java/org/onap/clamp/clds/util/drawing/SvgFacade.java
@@ -27,7 +27,7 @@ package org.onap.clamp.clds.util.drawing;
 import java.util.List;
 
 import org.apache.batik.svggen.SVGGraphics2D;
-import org.onap.clamp.clds.sdc.controller.installer.MicroService;
+import org.onap.clamp.clds.sdc.controller.installer.BlueprintMicroService;
 import org.onap.clamp.clds.util.XmlTools;
 import org.springframework.stereotype.Component;
 import org.w3c.dom.Document;
@@ -40,7 +40,7 @@ public class SvgFacade {
      * @param microServicesChain THe chain of microservices
      * @return A String containing the SVG
      */
-    public String getSvgImage(List<MicroService> microServicesChain) {
+    public String getSvgImage(List<BlueprintMicroService> microServicesChain) {
         SVGGraphics2D svgGraphics2D = new SVGGraphics2D(XmlTools.createEmptySvgDocument());
         Document document = XmlTools.createEmptySvgDocument();
         DocumentBuilder dp = new DocumentBuilder(document, svgGraphics2D.getDOMFactory());
diff --git a/src/main/java/org/onap/clamp/loop/CsarInstaller.java b/src/main/java/org/onap/clamp/loop/CsarInstaller.java
index 013d3419..022b0e28 100644
--- a/src/main/java/org/onap/clamp/loop/CsarInstaller.java
+++ b/src/main/java/org/onap/clamp/loop/CsarInstaller.java
@@ -33,13 +33,15 @@ import java.util.Map.Entry;
 
 import org.json.simple.parser.ParseException;
 import org.onap.clamp.clds.client.DcaeInventoryServices;
+import org.onap.clamp.clds.client.PolicyEngineServices;
+import org.onap.clamp.clds.exception.sdc.controller.BlueprintParserException;
 import org.onap.clamp.clds.exception.sdc.controller.SdcArtifactInstallerException;
 import org.onap.clamp.clds.model.dcae.DcaeInventoryResponse;
 import org.onap.clamp.clds.sdc.controller.installer.BlueprintArtifact;
+import org.onap.clamp.clds.sdc.controller.installer.BlueprintMicroService;
 import org.onap.clamp.clds.sdc.controller.installer.BlueprintParser;
 import org.onap.clamp.clds.sdc.controller.installer.ChainGenerator;
 import org.onap.clamp.clds.sdc.controller.installer.CsarHandler;
-import org.onap.clamp.clds.sdc.controller.installer.MicroService;
 import org.onap.clamp.clds.util.drawing.SvgFacade;
 import org.onap.clamp.loop.service.CsarServiceInstaller;
 import org.onap.clamp.loop.service.Service;
@@ -47,6 +49,8 @@ import org.onap.clamp.loop.template.LoopElementModel;
 import org.onap.clamp.loop.template.LoopTemplate;
 import org.onap.clamp.loop.template.LoopTemplatesRepository;
 import org.onap.clamp.loop.template.PolicyModel;
+import org.onap.clamp.loop.template.PolicyModelId;
+import org.onap.clamp.loop.template.PolicyModelsRepository;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.stereotype.Component;
@@ -61,31 +65,27 @@ import org.springframework.stereotype.Component;
 public class CsarInstaller {
 
     private static final EELFLogger logger = EELFManager.getInstance().getLogger(CsarInstaller.class);
-    public static final String CONTROL_NAME_PREFIX = "ClosedLoop-";
-    public static final String GET_INPUT_BLUEPRINT_PARAM = "get_input";
-    // This will be used later as the policy scope
-    public static final String MODEL_NAME_PREFIX = "Loop_";
 
     @Autowired
-    LoopsRepository loopRepository;
+    private PolicyModelsRepository policyModelsRepository;
 
     @Autowired
-    LoopTemplatesRepository loopTemplatesRepository;
+    private LoopTemplatesRepository loopTemplatesRepository;
 
     @Autowired
-    BlueprintParser blueprintParser;
+    private ChainGenerator chainGenerator;
 
     @Autowired
-    ChainGenerator chainGenerator;
+    private DcaeInventoryServices dcaeInventoryService;
 
     @Autowired
-    DcaeInventoryServices dcaeInventoryService;
+    private SvgFacade svgFacade;
 
     @Autowired
-    private SvgFacade svgFacade;
+    private CsarServiceInstaller csarServiceInstaller;
 
     @Autowired
-    CsarServiceInstaller csarServiceInstaller;
+    private PolicyEngineServices policyEngineServices;
 
     /**
      * Verify whether Csar is deployed.
@@ -113,8 +113,11 @@ public class CsarInstaller {
      * @param csar The Csar Handler
      * @throws SdcArtifactInstallerException The SdcArtifactInstallerException
      * @throws InterruptedException          The InterruptedException
+     * @throws BlueprintParserException      In case of issues with the blueprint
+     *                                       parsing
      */
-    public void installTheCsar(CsarHandler csar) throws SdcArtifactInstallerException, InterruptedException {
+    public void installTheCsar(CsarHandler csar)
+            throws SdcArtifactInstallerException, InterruptedException, BlueprintParserException {
         logger.info("Installing the CSAR " + csar.getFilePath());
         installTheLoopTemplates(csar, csarServiceInstaller.installTheService(csar));
         logger.info("Successfully installed the CSAR " + csar.getFilePath());
@@ -127,9 +130,11 @@ public class CsarInstaller {
      * @param service The service object that is related to the loop
      * @throws SdcArtifactInstallerException The SdcArtifactInstallerException
      * @throws InterruptedException          The InterruptedException
+     * @throws BlueprintParserException      In case of issues with the blueprint
+     *                                       parsing
      */
     public void installTheLoopTemplates(CsarHandler csar, Service service)
-            throws SdcArtifactInstallerException, InterruptedException {
+            throws SdcArtifactInstallerException, InterruptedException, BlueprintParserException {
         try {
             logger.info("Installing the Loops");
             for (Entry<String, BlueprintArtifact> blueprint : csar.getMapOfBlueprints().entrySet()) {
@@ -145,20 +150,20 @@ public class CsarInstaller {
     }
 
     private LoopTemplate createLoopTemplateFromBlueprint(CsarHandler csar, BlueprintArtifact blueprintArtifact,
-            Service service) throws IOException, ParseException, InterruptedException {
+            Service service) throws IOException, ParseException, InterruptedException, BlueprintParserException {
         LoopTemplate newLoopTemplate = new LoopTemplate();
         newLoopTemplate.setBlueprint(blueprintArtifact.getDcaeBlueprint());
         newLoopTemplate.setName(LoopTemplate.generateLoopTemplateName(csar.getSdcNotification().getServiceName(),
                 csar.getSdcNotification().getServiceVersion(),
                 blueprintArtifact.getResourceAttached().getResourceInstanceName(),
                 blueprintArtifact.getBlueprintArtifactName()));
-        List<MicroService> microServicesChain = chainGenerator
-                .getChainOfMicroServices(blueprintParser.getMicroServices(blueprintArtifact.getDcaeBlueprint()));
+        List<BlueprintMicroService> microServicesChain = chainGenerator
+                .getChainOfMicroServices(BlueprintParser.getMicroServices(blueprintArtifact.getDcaeBlueprint()));
         if (microServicesChain.isEmpty()) {
-            microServicesChain = blueprintParser.fallbackToOneMicroService(blueprintArtifact.getDcaeBlueprint());
+            microServicesChain = BlueprintParser.fallbackToOneMicroService();
         }
         newLoopTemplate.setModelService(service);
-        newLoopTemplate.addLoopElementModels(createMicroServiceModels(microServicesChain, csar, blueprintArtifact));
+        newLoopTemplate.addLoopElementModels(createMicroServiceModels(microServicesChain));
         newLoopTemplate.setMaximumInstancesAllowed(0);
         newLoopTemplate.setSvgRepresentation(svgFacade.getSvgImage(microServicesChain));
         DcaeInventoryResponse dcaeResponse = queryDcaeToGetServiceTypeId(blueprintArtifact);
@@ -166,14 +171,14 @@ public class CsarInstaller {
         return newLoopTemplate;
     }
 
-    private HashSet<LoopElementModel> createMicroServiceModels(List<MicroService> microServicesChain, CsarHandler csar,
-            BlueprintArtifact blueprintArtifact) throws IOException {
+    private HashSet<LoopElementModel> createMicroServiceModels(List<BlueprintMicroService> microServicesChain)
+            throws InterruptedException {
         HashSet<LoopElementModel> newSet = new HashSet<>();
-        for (MicroService microService : microServicesChain) {
+        for (BlueprintMicroService microService : microServicesChain) {
             LoopElementModel loopElementModel = new LoopElementModel(microService.getModelType(), "CONFIG_POLICY",
-                    blueprintArtifact.getDcaeBlueprint());
+                    null);
             newSet.add(loopElementModel);
-            loopElementModel.addPolicyModel(createPolicyModel(microService, csar));
+            loopElementModel.addPolicyModel(getPolicyModel(microService));
         }
         return newSet;
     }
@@ -183,14 +188,20 @@ public class CsarInstaller {
         return policyNameArray[policyNameArray.length - 1];
     }
 
-    private PolicyModel createPolicyModel(MicroService microService, CsarHandler csar) throws IOException {
-        return new PolicyModel(microService.getModelType(), csar.getPolicyModelYaml().orElse(""), "1.0",
-                createPolicyAcronym(microService.getModelType()));
+    private PolicyModel createPolicyModel(BlueprintMicroService microService) throws InterruptedException {
+        return new PolicyModel(microService.getModelType(),
+                policyEngineServices.downloadOnePolicy(microService.getModelType(), microService.getModelVersion()),
+                microService.getModelVersion(), createPolicyAcronym(microService.getModelType()));
+    }
+
+    private PolicyModel getPolicyModel(BlueprintMicroService microService) throws InterruptedException {
+        return policyModelsRepository
+                .findById(new PolicyModelId(microService.getModelType(), microService.getModelVersion()))
+                .orElse(createPolicyModel(microService));
     }
 
     /**
-     * ll get the latest version of the artifact (version can be specified to DCAE
-     * call).
+     * Get the service blueprint Id in the Dcae inventory using the SDC UUID.
      *
      * @return The DcaeInventoryResponse object containing the dcae values
      */
diff --git a/src/main/java/org/onap/clamp/loop/template/LoopElementModel.java b/src/main/java/org/onap/clamp/loop/template/LoopElementModel.java
index e3f05a01..0a0831bb 100644
--- a/src/main/java/org/onap/clamp/loop/template/LoopElementModel.java
+++ b/src/main/java/org/onap/clamp/loop/template/LoopElementModel.java
@@ -70,7 +70,7 @@ public class LoopElementModel extends AuditEntity implements Serializable {
     /**
      * Here we store the blueprint coming from DCAE.
      */
-    @Column(columnDefinition = "MEDIUMTEXT", nullable = false, name = "blueprint_yaml")
+    @Column(columnDefinition = "MEDIUMTEXT", name = "blueprint_yaml")
     private String blueprint;
 
     /**
diff --git a/src/main/java/org/onap/clamp/loop/template/PolicyModel.java b/src/main/java/org/onap/clamp/loop/template/PolicyModel.java
index 886e8c80..53539fcc 100644
--- a/src/main/java/org/onap/clamp/loop/template/PolicyModel.java
+++ b/src/main/java/org/onap/clamp/loop/template/PolicyModel.java
@@ -224,7 +224,13 @@ public class PolicyModel extends AuditEntity implements Serializable, Comparable
 
     @Override
     public int compareTo(PolicyModel arg0) {
-        // Reverse it, so that by default we have the latest
-        return SemanticVersioning.compare(arg0.getVersion(), this.version);
+
+        if (this.getPolicyModelType().equals(arg0.getPolicyModelType())) {
+            // Reverse it, so that by default we have the latest in they are same model type
+            return SemanticVersioning.compare(arg0.getVersion(), this.version);
+        } else {
+            return this.getPolicyModelType().compareTo(arg0.getPolicyModelType());
+        }
+
     }
 }
diff --git a/src/main/java/org/onap/clamp/policy/downloader/PolicyDownloader.java b/src/main/java/org/onap/clamp/policy/downloader/PolicyDownloader.java
new file mode 100644
index 00000000..b712dc3f
--- /dev/null
+++ b/src/main/java/org/onap/clamp/policy/downloader/PolicyDownloader.java
@@ -0,0 +1,61 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP CLAMP
+ * ================================================================================
+ * Copyright (C) 2020 AT&T Intellectual Property. All rights
+ *                             reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END============================================
+ * ===================================================================
+ *
+ */
+
+package org.onap.clamp.policy.downloader;
+
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+
+import org.apache.camel.CamelContext;
+import org.onap.clamp.clds.client.DcaeInventoryServices;
+import org.onap.clamp.clds.config.ClampProperties;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Profile;
+
+/**
+ * This class implements a periodic job that is done in the background to
+ * synchronize policy models available on the policy engine and the clamp
+ * database table PolicyModel.
+ */
+@Configuration
+@Profile("clamp-policy-controller")
+public class PolicyDownloader {
+
+    protected static final EELFLogger logger = EELFManager.getInstance().getLogger(DcaeInventoryServices.class);
+    protected static final EELFLogger auditLogger = EELFManager.getInstance().getAuditLogger();
+    protected static final EELFLogger metricsLogger = EELFManager.getInstance().getMetricsLogger();
+    public static final String POLICY_RETRY_INTERVAL = "policy.retry.interval";
+    public static final String POLICY_RETRY_LIMIT = "policy.retry.limit";
+
+    private final CamelContext camelContext;
+
+    private final ClampProperties refProp;
+
+    @Autowired
+    public PolicyDownloader(CamelContext camelContext, ClampProperties refProp) {
+        this.refProp = refProp;
+        this.camelContext = camelContext;
+    }
+
+}