Fix blueprint installation

This fix crashes the blueprint installation when it contains a link to a microservice that does not exist in the policy engine.

Issue-ID: CLAMP-977
Signed-off-by: sebdet <sebastien.determe@intl.att.com>
Change-Id: I659d864d202d9d77ef14560b1391397196ae1fbe

3 files changed, 43 insertions, 28 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
index 260bd1e48..c75d733a8 100644
--- a/src/main/java/org/onap/clamp/clds/client/PolicyEngineServices.java
+++ b/src/main/java/org/onap/clamp/clds/client/PolicyEngineServices.java
@@ -87,20 +87,29 @@ public class PolicyEngineServices {
 
     /**
      * This method query Policy engine and create a PolicyModel object with type and version.
+     * If the policy already exist in the db it returns the existing one.
      *
      * @param policyType    The policyType id
      * @param policyVersion The policy version of that type
-     * @return A PolicyModel created from policyEngine data
+     * @return A PolicyModel created from policyEngine data or null if nothing is found on policyEngine
      */
     public PolicyModel createPolicyModelFromPolicyEngine(String policyType, String policyVersion) {
-        if (!policyModelsService.existsById(
-                new PolicyModelId(policyType, policyVersion))) {
-            return policyModelsService.savePolicyModelInNewTransaction(
-                    new PolicyModel(policyType, this.downloadOnePolicy(policyType, policyVersion), policyVersion));
+        PolicyModel policyModelFound = policyModelsService.getPolicyModel(policyType, policyVersion);
+        if (policyModelFound == null) {
+            String policyTosca = this.downloadOnePolicy(policyType, policyVersion);
+            if (policyTosca != null && !policyTosca.isEmpty()) {
+                return policyModelsService.savePolicyModelInNewTransaction(
+                        new PolicyModel(policyType, policyTosca, policyVersion));
+            } else {
+                logger.error("Policy not found in the Policy Engine, returning null: " + policyType
+                        + "/" + policyVersion);
+                return null;
+            }
+        } else {
+            logger.info("Skipping policy model download as it exists already in the database " + policyType
+                    + "/" + policyVersion);
+            return policyModelFound;
         }
-        logger.info("Skipping policy model download as it exists already in the database " + policyType
-                + "/" + policyVersion);
-        return null;
     }
 
     /**
@@ -158,10 +167,17 @@ public class PolicyEngineServices {
         options.setPrettyFlow(true);
         options.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);
         Yaml yamlParser = new Yaml(options);
-        return yamlParser.dump((Map<String, Object>) yamlParser.load(callCamelRoute(
+        String responseBody = callCamelRoute(
                 ExchangeBuilder.anExchange(camelContext).withProperty("policyModelName", policyType)
                         .withProperty("policyModelVersion", policyVersion).build(), "direct:get-policy-model",
-                "Get one policy")));
+                "Get one policy");
+
+        if (responseBody == null || responseBody.isEmpty()) {
+            logger.warn("getPolicyModel returned by policy engine could not be decoded, as it's null or empty");
+            return null;
+        }
+
+        return yamlParser.dump((Map<String, Object>) yamlParser.load(responseBody));
     }
 
     /**
@@ -196,8 +212,7 @@ public class PolicyEngineServices {
             Exchange exchangeResponse = camelContext.createProducerTemplate().send(camelFlow, exchange);
             if (Integer.valueOf(200).equals(exchangeResponse.getIn().getHeader("CamelHttpResponseCode"))) {
                 return (String) exchangeResponse.getIn().getBody();
-            }
-            else {
+            } else {
                 logger.info(logMsg + " query " + retryInterval + "ms before retrying ...");
                 // wait for a while and try to connect to DCAE again
                 try {
diff --git a/src/main/java/org/onap/clamp/loop/CsarInstaller.java b/src/main/java/org/onap/clamp/loop/CsarInstaller.java
index 67c7ce5cf..6752a1a36 100644
--- a/src/main/java/org/onap/clamp/loop/CsarInstaller.java
+++ b/src/main/java/org/onap/clamp/loop/CsarInstaller.java
@@ -152,7 +152,8 @@ public class CsarInstaller {
 
     private LoopTemplate createLoopTemplateFromBlueprint(CsarHandler csar, BlueprintArtifact blueprintArtifact,
                                                          Service service)
-            throws IOException, ParseException, InterruptedException, BlueprintParserException {
+            throws IOException, ParseException, InterruptedException, BlueprintParserException,
+            SdcArtifactInstallerException {
         LoopTemplate newLoopTemplate = new LoopTemplate();
         newLoopTemplate.setBlueprint(blueprintArtifact.getDcaeBlueprint());
         newLoopTemplate.setName(LoopTemplate.generateLoopTemplateName(csar.getSdcNotification().getServiceName(),
@@ -165,32 +166,35 @@ public class CsarInstaller {
             microServicesChain = BlueprintParser.fallbackToOneMicroService();
         }
         newLoopTemplate.setModelService(service);
-        newLoopTemplate.addLoopElementModels(createMicroServiceModels(microServicesChain));
+        newLoopTemplate.addLoopElementModels(createMicroServiceModels(blueprintArtifact, microServicesChain));
         newLoopTemplate.setMaximumInstancesAllowed(0);
         DcaeInventoryResponse dcaeResponse = queryDcaeToGetServiceTypeId(blueprintArtifact);
         newLoopTemplate.setDcaeBlueprintId(dcaeResponse.getTypeId());
         return newLoopTemplate;
     }
 
-    private HashSet<LoopElementModel> createMicroServiceModels(List<BlueprintMicroService> microServicesChain)
-            throws InterruptedException {
+    private HashSet<LoopElementModel> createMicroServiceModels(BlueprintArtifact blueprintArtifact,
+                                                               List<BlueprintMicroService> microServicesChain)
+            throws SdcArtifactInstallerException {
         HashSet<LoopElementModel> newSet = new HashSet<>();
         for (BlueprintMicroService microService : microServicesChain) {
             LoopElementModel loopElementModel =
                     new LoopElementModel(microService.getModelType(), LoopElementModel.MICRO_SERVICE_TYPE,
                             null);
             newSet.add(loopElementModel);
-            loopElementModel.addPolicyModel(getPolicyModel(microService));
+            PolicyModel newPolicyModel = policyEngineServices.createPolicyModelFromPolicyEngine(microService);
+            if (newPolicyModel != null) {
+                loopElementModel.addPolicyModel(newPolicyModel);
+            } else {
+                throw new SdcArtifactInstallerException(
+                        "Unable to find the policy specified in the blueprint " +
+                                blueprintArtifact.getBlueprintArtifactName() + ") on the Policy Engine:" +
+                                microService.getModelType() + "/" + microService.getModelVersion());
+            }
         }
         return newSet;
     }
 
-    private PolicyModel getPolicyModel(BlueprintMicroService microService) throws InterruptedException {
-        return policyModelsRepository
-                .findById(new PolicyModelId(microService.getModelType(), microService.getModelVersion()))
-                .orElse(policyEngineServices.createPolicyModelFromPolicyEngine(microService));
-    }
-
     /**
      * Get the service blueprint Id in the Dcae inventory using the SDC UUID.
      *
diff --git a/src/main/java/org/onap/clamp/loop/template/PolicyModelsService.java b/src/main/java/org/onap/clamp/loop/template/PolicyModelsService.java
index a1b8f7cf2..17cf5c1c8 100644
--- a/src/main/java/org/onap/clamp/loop/template/PolicyModelsService.java
+++ b/src/main/java/org/onap/clamp/loop/template/PolicyModelsService.java
@@ -100,7 +100,7 @@ public class PolicyModelsService {
     public PolicyModel updatePolicyModelTosca(String policyModelType, String policyModelVersion,
         String policyModelTosca) {
         JsonObject jsonObject = toscaYamlToJsonConvertor.validateAndConvertToJson(policyModelTosca);
-        PolicyModel thePolicyModel = getPolicyModelByType(policyModelType, policyModelVersion);
+        PolicyModel thePolicyModel = getPolicyModel(policyModelType, policyModelVersion);
         thePolicyModel.setPolicyAcronym(toscaYamlToJsonConvertor.getValueFromMetadata(jsonObject,
             ToscaSchemaConstants.METADATA_ACRONYM));
         thePolicyModel.setPolicyModelTosca(policyModelTosca);
@@ -123,10 +123,6 @@ public class PolicyModelsService {
         return policyModelsRepository.findByPolicyModelType(type);
     }
 
-    public PolicyModel getPolicyModelByType(String type, String version) {
-        return policyModelsRepository.findById(new PolicyModelId(type, version)).orElse(null);
-    }
-
     /**
      * Retrieves the Tosca model Yaml string.
      *