appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/node/FlowControlNode.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP : APPC
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
   6  * =============================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  *
  19  * ECOMP is a trademark and service mark of AT&T Intellectual Property.
  20  * ============LICENSE_END=========================================================
  21  */
  22
  23 package org.onap.appc.flow.controller.node;
  24
  25 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.ACTION_LEVEL;
  26 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.APPC_FLOW_CONTROLLER;
  27 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.DESINGTIME;
  28 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.EXTERNAL;
  29 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.FLOW_SEQUENCE;
  30 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.GENERATION_NODE;
  31 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.GRAPH;
  32 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.INPUT_PARAM_RESPONSE_PREFIX;
  33 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.NODE;
  34 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.OUTPUT_PARAM_ERROR_MESSAGE;
  35 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.OUTPUT_PARAM_STATUS;
  36 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.OUTPUT_STATUS_FAILURE;
  37 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.OUTPUT_STATUS_MESSAGE;
  38 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.OUTPUT_STATUS_SUCCESS;
  39 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.PAYLOAD;
  40 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.REQUEST_ACTION;
  41 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.REQUEST_ID;
  42 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.RESPONSE_PREFIX;
  43 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.REST;
  44 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.RUNTIME;
  45 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.SEQUENCE_TYPE;
  46 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.SEQ_GENERATOR_PWD;
  47 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.SEQ_GENERATOR_UID;
  48 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.SEQ_GENERATOR_URL;
  49 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VF_MODULE;
  50 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VM;
  51 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VNF;
  52 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VNFC;
  53 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VNFC_NAME;
  54 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VNFC_TYPE;
  55 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VNF_ID;
  56 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VNF_TYPE;
  57 import static org.onap.appc.flow.controller.utils.FlowControllerConstants.VSERVER_ID;
  58
  59 import com.att.eelf.configuration.EELFLogger;
  60 import com.att.eelf.configuration.EELFManager;
  61 import com.fasterxml.jackson.annotation.JsonInclude.Include;
  62 import com.fasterxml.jackson.core.type.TypeReference;
  63 import com.fasterxml.jackson.databind.DeserializationFeature;
  64 import com.fasterxml.jackson.databind.JsonNode;
  65 import com.fasterxml.jackson.databind.ObjectMapper;
  66 import com.fasterxml.jackson.databind.SerializationFeature;
  67 import java.io.IOException;
  68 import java.util.ArrayList;
  69 import java.util.Arrays;
  70 import java.util.HashMap;
  71 import java.util.List;
  72 import java.util.Map;
  73 import java.util.Properties;
  74 import org.apache.commons.lang3.StringUtils;
  75 import org.json.JSONObject;
  76 import org.onap.appc.flow.controller.ResponseHandlerImpl.DefaultResponseHandler;
  77 import org.onap.appc.flow.controller.data.PrecheckOption;
  78 import org.onap.appc.flow.controller.data.ResponseAction;
  79 import org.onap.appc.flow.controller.data.Transaction;
  80 import org.onap.appc.flow.controller.data.Transactions;
  81 import org.onap.appc.flow.controller.dbervices.FlowControlDBService;
  82 import org.onap.appc.flow.controller.executorImpl.GraphExecutor;
  83 import org.onap.appc.flow.controller.executorImpl.NodeExecutor;
  84 import org.onap.appc.flow.controller.executorImpl.RestExecutor;
  85 import org.onap.appc.flow.controller.interfaceData.ActionIdentifier;
  86 import org.onap.appc.flow.controller.interfaceData.Capabilities;
  87 import org.onap.appc.flow.controller.interfaceData.DependencyInfo;
  88 import org.onap.appc.flow.controller.interfaceData.Input;
  89 import org.onap.appc.flow.controller.interfaceData.InventoryInfo;
  90 import org.onap.appc.flow.controller.interfaceData.RequestInfo;
  91 import org.onap.appc.flow.controller.interfaceData.Vnfcs;
  92 import org.onap.appc.flow.controller.interfaces.FlowExecutorInterface;
  93 import org.onap.appc.flow.controller.utils.EncryptionTool;
  94 import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
  95 import org.onap.ccsdk.sli.core.sli.SvcLogicException;
  96 import org.onap.ccsdk.sli.core.sli.SvcLogicJavaPlugin;
  97
  98 public class FlowControlNode implements SvcLogicJavaPlugin {
  99
 100   private static final EELFLogger log = EELFManager.getInstance().getLogger(FlowControlNode.class);
 101   private static final String SDNC_CONFIG_DIR_VAR = "SDNC_CONFIG_DIR";
 102
 103   private final EnvVariables envVariables;
 104   private final FlowControlDBService dbService;
 105
 106   public FlowControlNode() {
 107     this.envVariables = new EnvVariables();
 108     this.dbService = FlowControlDBService.initialise();
 109   }
 110
 111   FlowControlNode(EnvVariables envVariables, FlowControlDBService dbService) {
 112     this.envVariables = envVariables;
 113     this.dbService = dbService;
 114   }
 115
 116   public void processFlow(Map<String, String> inParams, SvcLogicContext ctx)
 117       throws SvcLogicException {
 118     log.debug("Received processParamKeys call with params : " + inParams);
 119     String responsePrefix = inParams.get(INPUT_PARAM_RESPONSE_PREFIX);
 120     try {
 121       responsePrefix = StringUtils.isNotBlank(responsePrefix) ? (responsePrefix + ".") : "";
 122       SvcLogicContext localContext = new SvcLogicContext();
 123
 124       localContext.setAttribute(REQUEST_ID, ctx.getAttribute(REQUEST_ID));
 125       localContext.setAttribute(VNF_TYPE, ctx.getAttribute(VNF_TYPE));
 126       localContext.setAttribute(REQUEST_ACTION, ctx.getAttribute(REQUEST_ACTION));
 127       localContext.setAttribute(ACTION_LEVEL, ctx.getAttribute(ACTION_LEVEL));
 128       localContext.setAttribute(RESPONSE_PREFIX, responsePrefix);
 129       ctx.setAttribute(RESPONSE_PREFIX, responsePrefix);
 130
 131       dbService.getFlowReferenceData(ctx, inParams, localContext);
 132
 133       for (String key : localContext.getAttributeKeySet()) {
 134         log.debug("processFlow " + key + "=" + ctx.getAttribute(key));
 135       }
 136       processFlowSequence(inParams, ctx, localContext);
 137       if (!ctx.getAttribute(responsePrefix + OUTPUT_PARAM_STATUS).equals(OUTPUT_STATUS_SUCCESS)) {
 138         throw new SvcLogicException(ctx.getAttribute(responsePrefix + OUTPUT_STATUS_MESSAGE));
 139       }
 140     } catch (Exception e) {
 141       ctx.setAttribute(responsePrefix + OUTPUT_PARAM_STATUS, OUTPUT_STATUS_FAILURE);
 142       ctx.setAttribute(responsePrefix + OUTPUT_PARAM_ERROR_MESSAGE, e.getMessage());
 143       log.error("Error occurred in processFlow ", e);
 144       throw new SvcLogicException(e.getMessage());
 145     }
 146   }
 147
 148   private void processFlowSequence(Map<String, String> inParams, SvcLogicContext ctx, SvcLogicContext localContext)
 149       throws Exception {
 150
 151     String fn = "FlowExecutorNode.processflowSequence";
 152     log.debug(fn + "Received model for flow : " + localContext.toString());
 153
 154     String flowSequence = null;
 155     for (String key : localContext.getAttributeKeySet()) {
 156       log.debug(key + "=" + ctx.getAttribute(key));
 157     }
 158     if (localContext.getAttribute(SEQUENCE_TYPE) != null) {
 159       if (localContext.getAttribute(GENERATION_NODE) != null) {
 160         GraphExecutor transactionExecutor = new GraphExecutor();
 161         Boolean generatorExists = transactionExecutor.hasGraph(
 162             "APPC_COMMOM",
 163             localContext.getAttribute(GENERATION_NODE),
 164             null,
 165             "sync"
 166         );
 167
 168         if (generatorExists) {
 169           flowSequence = transactionExecutor.executeGraph(
 170               "APPC_COMMOM",
 171               localContext.getAttribute(GENERATION_NODE),
 172               null, "sync", null)
 173               .getProperty(FLOW_SEQUENCE);
 174         } else {
 175           throw new Exception("Can not find Custom defined Flow Generator for "
 176               + localContext.getAttribute(GENERATION_NODE));
 177         }
 178
 179       } else if ((localContext.getAttribute(SEQUENCE_TYPE)).equalsIgnoreCase(DESINGTIME)) {
 180
 181         localContext.setAttribute(VNFC_TYPE, ctx.getAttribute(VNFC_TYPE));
 182         flowSequence = dbService.getDesignTimeFlowModel(localContext);
 183
 184         if (flowSequence == null) {
 185           throw new Exception("Flow Sequence is not found User Designed VNF " + ctx.getAttribute(VNF_TYPE));
 186         }
 187
 188       } else if ((localContext.getAttribute(SEQUENCE_TYPE)).equalsIgnoreCase(RUNTIME)) {
 189
 190         Transaction transaction = new Transaction();
 191         String input = collectInputParams(ctx, transaction);
 192         log.info("CollectInputParamsData-Input: " + input);
 193
 194         RestExecutor restExe = new RestExecutor();
 195         Map<String, String> flowSeq = restExe.execute(transaction, localContext);
 196
 197         JSONObject sequence = new JSONObject(flowSeq.get("restResponse"));
 198         if (sequence.has("output")) {
 199           flowSequence = sequence.getJSONObject("output").toString();
 200         }
 201         log.info("MultistepSequenceGenerator-Output: " + flowSequence);
 202
 203         if (flowSequence == null) {
 204           throw new Exception("Failed to get the Flow Sequece runtime for VNF type"
 205               + ctx.getAttribute(VNF_TYPE));
 206         }
 207
 208       } else if ((localContext.getAttribute(SEQUENCE_TYPE)).equalsIgnoreCase(EXTERNAL)) {
 209         //String input = collectInputParams(localContext);
 210         //    flowSequnce = ""; //get it from the External interface calling the Rest End point - TBD
 211         //if(flowSequnce == null)
 212
 213         throw new Exception("Flow Sequence not found for " + ctx.getAttribute(VNF_TYPE));
 214
 215       } else {
 216         //No other type of model supported...
 217         //in Future can get flowModel from other generators which will be included here
 218         throw new Exception("No information found for sequence Owner Design-Time Vs Run-Time");
 219       }
 220
 221     } else {
 222       FlowGenerator flowGenerator = new FlowGenerator();
 223       Transactions trans = flowGenerator.createSingleStepModel(inParams, ctx);
 224       ObjectMapper mapper = new ObjectMapper();
 225       flowSequence = mapper.writeValueAsString(trans);
 226       log.debug("Single step Flow Sequence : " + flowSequence);
 227     }
 228
 229     log.debug("Received Flow Sequence : " + flowSequence);
 230     HashMap<Integer, Transaction> transactionMap = createTransactionMap(flowSequence, localContext);
 231     executeAllTransaction(transactionMap, ctx);
 232     log.info("Executed all the transaction successfully");
 233   }
 234
 235   private void executeAllTransaction(HashMap<Integer, Transaction> transactionMap, SvcLogicContext ctx)
 236       throws Exception {
 237
 238     String fn = "FlowExecutorNode.executeAllTransaction ";
 239     int retry = 0;
 240     FlowExecutorInterface flowExecutor;
 241     for (int key = 1; key <= transactionMap.size(); key++) {
 242       log.debug(fn + "Starting transactions ID " + key + " :)=" + retry);
 243       Transaction transaction = transactionMap.get(key);
 244       if (!preProcessor(transactionMap, transaction)) {
 245         log.info("Skipping Transaction ID " + transaction.getTransactionId());
 246         continue;
 247       }
 248       if (transaction.getExecutionType() != null) {
 249         switch (transaction.getExecutionType()) {
 250           case GRAPH:
 251             flowExecutor = new GraphExecutor();
 252             break;
 253           case NODE:
 254             flowExecutor = new NodeExecutor();
 255             break;
 256           case REST:
 257             flowExecutor = new RestExecutor();
 258             break;
 259           default:
 260             throw new Exception("No Executor found for transaction ID" + transaction.getTransactionId());
 261         }
 262         flowExecutor.execute(transaction, ctx);
 263         ResponseAction responseAction = handleResponse(transaction);
 264
 265         if (responseAction.getWait() != null && Integer.parseInt(responseAction.getWait()) > 0) {
 266           log.debug(fn + "Going to Sleep .... " + responseAction.getWait());
 267           Thread.sleep(Integer.parseInt(responseAction.getWait()) * 1000L);
 268         }
 269         if (responseAction.isIntermediateMessage()) {
 270           log.debug(fn + "Sending Intermediate Message back  .... ");
 271           sendIntermediateMessage();
 272         }
 273         if (responseAction.getRetry() != null && Integer.parseInt(responseAction.getRetry()) > retry) {
 274           log.debug(fn + "Ooppss!!! We will retry again ....... ");
 275           key--;
 276           retry++;
 277           log.debug(fn + "key =" + key + "retry =" + retry);
 278         }
 279         if (responseAction.isIgnore()) {
 280           log.debug(fn + "Ignoring this Error and moving ahead  ....... ");
 281           continue;
 282         }
 283         if (responseAction.isStop()) {
 284           log.debug(fn + "Need to Stop  ....... ");
 285           break;
 286         }
 287         if (responseAction.getJump() != null && Integer.parseInt(responseAction.getJump()) > 0) {
 288           key = Integer.parseInt(responseAction.getJump());
 289           key--;
 290         }
 291         log.debug(fn + "key =" + key + "retry =" + retry);
 292
 293       } else {
 294         throw new Exception("Don't know how to execute transaction ID " + transaction.getTransactionId());
 295       }
 296     }
 297   }
 298
 299   private void sendIntermediateMessage() {
 300     // TODO Auto-generated method stub
 301   }
 302
 303   private ResponseAction handleResponse(Transaction transaction) {
 304     log.info("Handling Response for transaction Id " + transaction.getTransactionId());
 305     DefaultResponseHandler defaultHandler = new DefaultResponseHandler();
 306     return defaultHandler.handlerResponse(transaction);
 307   }
 308
 309   private boolean preProcessor(HashMap<Integer, Transaction> transactionMap, Transaction transaction)
 310       throws IOException {
 311
 312     log.debug("Starting Preprocessing Logic ");
 313     boolean runThisStep = false;
 314     try {
 315       if (transaction.getPrecheck() != null
 316           && transaction.getPrecheck().getPrecheckOptions() != null
 317           && !transaction.getPrecheck().getPrecheckOptions().isEmpty()) {
 318
 319         List<PrecheckOption> precheckOptions = transaction.getPrecheck().getPrecheckOptions();
 320         for (PrecheckOption precheck : precheckOptions) {
 321           Transaction trans = transactionMap.get(precheck.getpTransactionID());
 322           ObjectMapper mapper = new ObjectMapper();
 323           log.info("Mapper= " + mapper.writeValueAsString(trans));
 324           HashMap trmap = mapper.readValue(mapper.writeValueAsString(trans), HashMap.class);
 325           runThisStep = trmap.get(precheck.getParamName()) != null
 326               && ((String) trmap.get(precheck.getParamName()))
 327               .equalsIgnoreCase(precheck.getParamValue());
 328
 329           if (("any").equalsIgnoreCase(transaction.getPrecheck().getPrecheckOperator()) && runThisStep) {
 330             break;
 331           }
 332         }
 333       } else {
 334         log.debug("No Pre check defined for transaction ID " + transaction.getTransactionId());
 335         runThisStep = true;
 336       }
 337     } catch (Exception e) {
 338       log.error("Error occured when Preprocessing Logic ", e);
 339       throw e;
 340     }
 341     log.debug("Returing process current Transaction = " + runThisStep);
 342     return runThisStep;
 343   }
 344
 345   private HashMap<Integer, Transaction> createTransactionMap(String flowSequence, SvcLogicContext localContext)
 346       throws Exception {
 347
 348     ObjectMapper mapper = new ObjectMapper();
 349     Transactions transactions = mapper.readValue(flowSequence, Transactions.class);
 350     HashMap<Integer, Transaction> transMap = new HashMap<>();
 351     for (Transaction transaction : transactions.getTransactions()) {
 352       compileFlowDependencies(transaction, localContext);
 353       //parse the Transactions Object and create records in process_flow_status table
 354       //loadTransactionIntoStatus(transactions, ctx);
 355       transMap.put(transaction.getTransactionId(), transaction);
 356     }
 357     return transMap;
 358   }
 359
 360   private void compileFlowDependencies(Transaction transaction, SvcLogicContext localContext)
 361       throws Exception {
 362
 363     dbService.populateModuleAndRPC(transaction, localContext.getAttribute(VNF_TYPE));
 364     ObjectMapper mapper = new ObjectMapper();
 365     log.debug("Individual Transaction Details :" + transaction.toString());
 366
 367     if ((localContext.getAttribute(SEQUENCE_TYPE) == null)
 368         || (localContext.getAttribute(SEQUENCE_TYPE) != null
 369         && !localContext.getAttribute(SEQUENCE_TYPE)
 370         .equalsIgnoreCase(DESINGTIME))) {
 371
 372       localContext.setAttribute("artifact-content", mapper.writeValueAsString(transaction));
 373       dbService.loadSequenceIntoDB(localContext);
 374     }
 375     //get a field in transction class as transactionhandle interface and register the Handler here for each trnactions
 376   }
 377
 378   private String collectInputParams(SvcLogicContext ctx, Transaction transaction) throws Exception {
 379
 380     String fn = "FlowExecuteNode.collectInputParams";
 381     Properties prop = loadProperties();
 382     log.info("Loaded Properties " + prop.toString());
 383
 384     String vnfId = ctx.getAttribute(VNF_ID);
 385     String inputData = null;
 386     log.debug(fn + "vnfId :" + vnfId);
 387
 388     if (StringUtils.isBlank(vnfId)) {
 389       throw new Exception("VnfId is missing");
 390     }
 391
 392     try {
 393       ActionIdentifier actionIdentifier = new ActionIdentifier();
 394       log.debug("Enter ActionIdentifier");
 395       if (StringUtils.isNotBlank(vnfId)) {
 396         actionIdentifier.setVnfId(vnfId);
 397       }
 398       if (StringUtils.isNotBlank(ctx.getAttribute(VSERVER_ID))) {
 399         actionIdentifier.setVserverId(ctx.getAttribute(VSERVER_ID));
 400       }
 401       if (StringUtils.isNotBlank(ctx.getAttribute(VNFC_NAME))) {
 402         actionIdentifier.setVnfcName(ctx.getAttribute(VNFC_NAME));
 403       }
 404       log.info("ActionIdentifierData" + actionIdentifier.toString());
 405
 406       RequestInfo requestInfo = new RequestInfo();
 407       log.info("Enter RequestInfo");
 408       requestInfo.setAction(ctx.getAttribute(REQUEST_ACTION));
 409       requestInfo.setActionLevel(ctx.getAttribute(ACTION_LEVEL));
 410       requestInfo.setPayload(ctx.getAttribute(PAYLOAD));
 411       requestInfo.setActionIdentifier(actionIdentifier);
 412       log.debug("RequestInfo: " + requestInfo.toString());
 413
 414       InventoryInfo inventoryInfo = new InventoryInfoExtractor().getInventoryInfo(ctx, vnfId);
 415       DependencyInfo dependencyInfo = getDependencyInfo(ctx);
 416       Capabilities capabilities = getCapabilitiesData(ctx);
 417
 418       Input input = new Input();
 419       log.info("Enter InputData");
 420       input.setRequestInfo(requestInfo);
 421       input.setInventoryInfo(inventoryInfo);
 422       input.setDependencyInfo(dependencyInfo);
 423       input.setCapabilities(capabilities);
 424       log.info(fn + "Input parameters:" + input.toString());
 425
 426       ObjectMapper mapper = new ObjectMapper();
 427       mapper.setSerializationInclusion(Include.NON_NULL);
 428       mapper.configure(SerializationFeature.WRAP_ROOT_VALUE, true);
 429       inputData = mapper.writeValueAsString(input);
 430       log.info("InputDataJson:" + inputData);
 431
 432     } catch (Exception e) {
 433       log.error("Error occurred in " + fn, e);
 434     }
 435
 436     String resourceUri = prop.getProperty(SEQ_GENERATOR_URL);
 437     log.info(fn + "resourceUri= " + resourceUri);
 438
 439     EncryptionTool et = EncryptionTool.getInstance();
 440     String pass = et.decrypt(prop.getProperty(SEQ_GENERATOR_PWD));
 441
 442     transaction.setPayload(inputData);
 443     transaction.setExecutionRPC("POST");
 444     transaction.setuId(prop.getProperty(SEQ_GENERATOR_UID));
 445     transaction.setPswd(pass);
 446     transaction.setExecutionEndPoint(resourceUri);
 447
 448     return inputData;
 449   }
 450
 451   private DependencyInfo getDependencyInfo(SvcLogicContext ctx) throws Exception {
 452
 453     String fn = "FlowExecutorNode.getDependencyInfo";
 454     DependencyInfo dependencyInfo = new DependencyInfo();
 455     String dependencyData = dbService.getDependencyInfo(ctx);
 456     log.info(fn + "dependencyDataInput:" + dependencyData);
 457
 458     if (dependencyData != null) {
 459       ObjectMapper mapper = new ObjectMapper();
 460       mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
 461       mapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
 462       //JsonNode dependencyInfoData = mapper.readTree(dependencyData).get("dependencyInfo");
 463       JsonNode vnfcData = mapper.readTree(dependencyData).get("vnfcs");
 464       List<Vnfcs> vnfclist = Arrays.asList(mapper.readValue(vnfcData.toString(), Vnfcs[].class));
 465       dependencyInfo.getVnfcs().addAll(vnfclist);
 466
 467       log.info("Dependency Output:" + dependencyInfo.toString());
 468     }
 469     return dependencyInfo;
 470   }
 471
 472   Capabilities getCapabilitiesData(SvcLogicContext ctx) throws Exception {
 473
 474     String fn = "FlowExecutorNode.getCapabilitiesData";
 475     String capabilitiesData = dbService.getCapabilitiesData(ctx);
 476     log.info(fn + "capabilitiesDataInput:" + capabilitiesData);
 477
 478     Capabilities capabilities = new Capabilities();
 479     if (capabilitiesData == null) {
 480       return capabilities;
 481     }
 482
 483     ObjectMapper mapper = new ObjectMapper();
 484     mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
 485     mapper.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
 486
 487     JsonNode capabilitiesNode = mapper.readTree(capabilitiesData);
 488     log.info("capabilitiesNode:" + capabilitiesNode.toString());
 489
 490     capabilities.getVfModule().addAll(extractParameterList(mapper, capabilitiesNode, VF_MODULE));
 491     capabilities.getVnfc().addAll(extractParameterList(mapper, capabilitiesNode, VNFC));
 492     capabilities.getVnf().addAll(extractParameterList(mapper, capabilitiesNode, VNF));
 493     capabilities.getVm().addAll(extractParameterList(mapper, capabilitiesNode, VM));
 494
 495     log.info("Capabilities Output:" + capabilities.toString());
 496
 497     return capabilities;
 498   }
 499
 500   private <T> List<T> extractParameterList(ObjectMapper mapper, JsonNode root, String parameter) throws IOException {
 501     JsonNode parameterNode = root.get(parameter);
 502     if (parameterNode == null) {
 503       return new ArrayList<>();
 504     }
 505     return mapper.readValue(parameterNode.toString(), new TypeReference<List<T>>() {});
 506   }
 507
 508   private Properties loadProperties() throws Exception {
 509     String directory = envVariables.getenv(SDNC_CONFIG_DIR_VAR);
 510     if (directory == null) {
 511       throw new Exception("Cannot find Property file -" + SDNC_CONFIG_DIR_VAR);
 512     }
 513     String path = directory + APPC_FLOW_CONTROLLER;
 514     return PropertiesLoader.load(path);
 515   }
 516 }