appc-dispatcher/appc-request-handler/appc-request-handler-core/src/main/java/org/onap/appc/requesthandler/impl/AbstractRequestHandlerImpl.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP : APPC
   4  * ================================================================================
   5  * Copyright (C) 2017-2019 AT&T Intellectual Property. All rights reserved.
   6  * ================================================================================
   7  * Copyright (C) 2017 Amdocs
   8  * =============================================================================
   9  * Licensed under the Apache License, Version 2.0 (the "License");
  10  * you may not use this file except in compliance with the License.
  11  * You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  *
  21  * ============LICENSE_END=========================================================
  22  */
  23
  24 package org.onap.appc.requesthandler.impl;
  25
  26 import com.att.eelf.configuration.EELFLogger;
  27 import com.att.eelf.configuration.EELFManager;
  28 import org.apache.commons.lang.ObjectUtils;
  29 import org.apache.commons.lang.StringUtils;
  30 import org.onap.appc.configuration.Configuration;
  31 import org.onap.appc.configuration.ConfigurationFactory;
  32 import org.onap.appc.domainmodel.lcm.Flags;
  33 import org.onap.appc.domainmodel.lcm.RequestContext;
  34 import org.onap.appc.domainmodel.lcm.RequestStatus;
  35 import org.onap.appc.domainmodel.lcm.ResponseContext;
  36 import org.onap.appc.domainmodel.lcm.RuntimeContext;
  37 import org.onap.appc.domainmodel.lcm.Status;
  38 import org.onap.appc.domainmodel.lcm.TransactionRecord;
  39 import org.onap.appc.domainmodel.lcm.VNFOperation;
  40 import org.onap.appc.exceptions.APPCException;
  41 import org.onap.appc.exceptions.InvalidInputException;
  42 import org.onap.appc.executor.objects.LCMCommandStatus;
  43 import org.onap.appc.executor.objects.Params;
  44 import org.onap.appc.lockmanager.api.LockException;
  45 import org.onap.appc.logging.LoggingConstants;
  46 import org.onap.appc.logging.LoggingUtils;
  47 import org.onap.appc.messageadapter.MessageAdapter;
  48 import org.onap.appc.messageadapter.impl.MessageAdapterImpl;
  49 import org.onap.appc.metricservice.MetricRegistry;
  50 import org.onap.appc.metricservice.MetricService;
  51 import org.onap.appc.metricservice.metric.DispatchingFuntionMetric;
  52 import org.onap.appc.metricservice.metric.Metric;
  53 import org.onap.appc.metricservice.metric.MetricType;
  54 import org.onap.appc.metricservice.policy.PublishingPolicy;
  55 import org.onap.appc.metricservice.publisher.LogPublisher;
  56 import org.onap.appc.requesthandler.RequestHandler;
  57 import org.onap.appc.requesthandler.exceptions.RequestValidationException;
  58 import org.onap.appc.requesthandler.helper.RequestValidator;
  59 import org.onap.appc.requesthandler.objects.RequestHandlerInput;
  60 import org.onap.appc.requesthandler.objects.RequestHandlerOutput;
  61 import org.onap.appc.transactionrecorder.TransactionRecorder;
  62 import org.onap.appc.transactionrecorder.objects.TransactionConstants;
  63 import org.osgi.framework.BundleContext;
  64 import org.osgi.framework.FrameworkUtil;
  65 import org.osgi.framework.ServiceReference;
  66 import org.slf4j.MDC;
  67
  68 import java.net.InetAddress;
  69 import java.net.UnknownHostException;
  70 import java.text.SimpleDateFormat;
  71 import java.time.Instant;
  72 import java.util.Date;
  73 import java.util.HashMap;
  74 import java.util.Map;
  75 import java.util.Properties;
  76 import java.util.UUID;
  77 import java.util.TimeZone;
  78 import static com.att.eelf.configuration.Configuration.MDC_INSTANCE_UUID;
  79 import static com.att.eelf.configuration.Configuration.MDC_KEY_REQUEST_ID;
  80 import static com.att.eelf.configuration.Configuration.MDC_SERVER_FQDN;
  81 import static com.att.eelf.configuration.Configuration.MDC_SERVER_IP_ADDRESS;
  82 import static com.att.eelf.configuration.Configuration.MDC_SERVICE_INSTANCE_ID;
  83 import static com.att.eelf.configuration.Configuration.MDC_SERVICE_NAME;
  84
  85 /**
  86  * This class provides application logic for the Request/Response Handler Component.
  87  */
  88 public abstract class AbstractRequestHandlerImpl implements RequestHandler {
  89
  90     private RequestValidator requestValidator;
  91
  92     protected TransactionRecorder transactionRecorder;
  93
  94     private MessageAdapter messageAdapter;
  95
  96     static MetricRegistry metricRegistry;
  97
  98     private boolean isMetricEnabled = false;
  99
 100     protected final Configuration configuration = ConfigurationFactory.getConfiguration();
 101
 102     private final EELFLogger logger = EELFManager.getInstance().getLogger(AbstractRequestHandlerImpl.class);
 103
 104     AbstractRequestHandlerImpl() {
 105         messageAdapter = new MessageAdapterImpl();
 106         messageAdapter.init();
 107         Properties properties = configuration.getProperties();
 108         if (properties != null && properties.getProperty("metric.enabled") != null) {
 109             isMetricEnabled = Boolean.valueOf(properties.getProperty("metric.enabled"));
 110         }
 111         if (isMetricEnabled) {
 112             initMetric();
 113         }
 114     }
 115
 116     public void setTransactionRecorder(TransactionRecorder transactionRecorder) {
 117         this.transactionRecorder = transactionRecorder;
 118     }
 119
 120     public void setRequestValidator(RequestValidator requestValidator) {
 121         this.requestValidator = requestValidator;
 122     }
 123
 124     public void setMessageAdapter(MessageAdapter messageAdapter) {
 125         this.messageAdapter = messageAdapter;
 126     }
 127
 128     /**
 129      * It receives requests from the north-bound REST API (Communication) Layer and
 130      * performs following validations.
 131      * 1. VNF exists in A&AI for the given targetID (VnfID)
 132      * 2. For the current VNF  Orchestration Status, the command can be executed
 133      * 3. For the given VNF type and Operation, there exists work-flow definition in the APPC database
 134      * If any of the validation fails, it returns appropriate response     *
 135      *
 136      * @param input RequestHandlerInput object which contains request header and  other request parameters like
 137      *              command , target Id , payload etc.
 138      * @return response for request as enum with Return code and message.
 139      */
 140     @Override
 141     public RequestHandlerOutput handleRequest(RequestHandlerInput input) {
 142         if (logger.isTraceEnabled())
 143             logger.trace("Entering to handleRequest with RequestHandlerInput = " + ObjectUtils.toString(input) + ")");
 144         String errorMessage = null;
 145         RequestStatus requestStatus;
 146         TransactionRecord transactionRecord = createTransactionRecord(input);
 147         RuntimeContext runtimeContext = createRuntimeContext(input, transactionRecord);
 148         ResponseContext responseContext = createResponseContext(input);
 149         runtimeContext.setResponseContext(responseContext);
 150         RequestHandlerOutput output = new RequestHandlerOutput();
 151         try {
 152             transactionRecorder.store(transactionRecord);
 153             requestValidator.validateRequest(runtimeContext);
 154
 155             setInitialLogProperties(input.getRequestContext());
 156
 157             handleRequest(runtimeContext);
 158             output.setResponseContext(runtimeContext.getResponseContext());
 159         } catch (RequestValidationException e) {
 160             errorMessage = e.getMessage();
 161             logger.error(errorMessage, e);
 162             if (!StringUtils.isEmpty(e.getLogMessage()))
 163                 storeErrorMessageToLog(runtimeContext, e.getTargetEntity(), e.getTargetService(), e.getLogMessage());
 164             output = buildRequestHandlerOutput(e.getLcmCommandStatus(), e.getParams());
 165         } catch (InvalidInputException e) {
 166             logger.error("InvalidInputException : " + e.getMessage(), e);
 167             errorMessage = e.getMessage() != null ? e.getMessage() : e.toString();
 168             output = buildRequestHandlerOutput(LCMCommandStatus.INVALID_INPUT_PARAMETER, new Params().addParam
 169                 ("errorMsg", errorMessage));
 170         } catch (LockException e) {
 171             logger.error("LockException : " + e.getMessage(), e);
 172             Params params = new Params().addParam("errorMsg", e.getMessage());
 173             fillStatus(runtimeContext, LCMCommandStatus.LOCKED_VNF_ID, params);
 174             output = buildRequestHandlerOutput(LCMCommandStatus.LOCKED_VNF_ID, params);
 175         } catch (Exception e) {
 176             logger.error("Exception : " + e.getMessage(), e);
 177             storeErrorMessageToLog(runtimeContext, "", "", "Exception = " + e.getMessage());
 178             errorMessage = e.getMessage() != null ? e.getMessage() : e.toString();
 179             Params params = new Params().addParam("errorMsg", errorMessage);
 180             output = buildRequestHandlerOutput(LCMCommandStatus.UNEXPECTED_ERROR, params);
 181         } finally {
 182             final int statusCode = output.getResponseContext().getStatus().getCode();
 183             if (statusCode == LCMCommandStatus.ACCEPTED.getResponseCode()) {
 184                 requestStatus = RequestStatus.ACCEPTED;
 185             } else if (statusCode == LCMCommandStatus.SUCCESS.getResponseCode()) {
 186                 requestStatus = RequestStatus.SUCCESSFUL;
 187                 if (isMetricEnabled)
 188                     ((DispatchingFuntionMetric) metricRegistry.metric("DISPATCH_FUNCTION")).incrementAcceptedRequest();
 189             } else {
 190                 requestStatus = (statusCode == LCMCommandStatus.EXPIRED_REQUEST.getResponseCode()) ? RequestStatus
 191                     .TIMEOUT : RequestStatus.REJECTED;
 192                 if (isMetricEnabled)
 193                     ((DispatchingFuntionMetric) metricRegistry.metric("DISPATCH_FUNCTION")).incrementRejectedRequest();
 194             }
 195             try {
 196                 if (errorMessage != null && logger.isDebugEnabled())
 197                     logger.debug("error occurred in handleRequest " + errorMessage);
 198                 logger.debug("output.getResponseContext().getStatus().getCode():  " + statusCode);
 199                 runtimeContext.setResponseContext(output.getResponseContext());
 200             } finally {
 201                 runtimeContext.getTransactionRecord().setRequestState(requestStatus);
 202                 runtimeContext.getTransactionRecord().setResultCode(output.getResponseContext().getStatus().getCode());
 203                 updateTransactionStatus(runtimeContext.getTransactionRecord());
 204                 recordAndClearLogProperties(runtimeContext);
 205             }
 206         }
 207         if (logger.isTraceEnabled()) {
 208             logger.trace("Exiting from handleRequest with (RequestHandlerOutput = " +
 209                 ObjectUtils.toString(output.getResponseContext()) + ")");
 210         }
 211         return output;
 212     }
 213
 214     private ResponseContext createResponseContext(RequestHandlerInput input) {
 215         final ResponseContext responseContext = new ResponseContext();
 216         responseContext.setStatus(new Status());
 217         responseContext.setAdditionalContext(new HashMap<>(4));
 218         responseContext.setCommonHeader(input.getRequestContext().getCommonHeader());
 219         return responseContext;
 220     }
 221
 222     private void updateTransactionStatus(TransactionRecord record) {
 223         Map<TransactionConstants.TRANSACTION_ATTRIBUTES, String> updateColumns = new HashMap<>();
 224         if (!StringUtils.isBlank(record.getTargetType())) {
 225             updateColumns.put(TransactionConstants.TRANSACTION_ATTRIBUTES.TARGET_TYPE, record.getTargetType());
 226         }
 227         updateColumns.put(TransactionConstants.TRANSACTION_ATTRIBUTES.STATE, record.getRequestState());
 228         updateColumns.put(TransactionConstants.TRANSACTION_ATTRIBUTES.RESULT_CODE,
 229                 String.valueOf(record.getResultCode()));
 230         if (RequestStatus.valueOf(record.getRequestState()).isTerminal()) {
 231             Date endTime = new Date();
 232             updateColumns.put(TransactionConstants.TRANSACTION_ATTRIBUTES.END_TIME,
 233                     dateToStringConverterMillis(endTime));
 234         }
 235         try {
 236             transactionRecorder.update(record.getTransactionId(), record.getRequestId(), updateColumns);
 237         } catch (APPCException e) {
 238             logger.error("Error accessing database", e);
 239         }
 240     }
 241
 242     private RuntimeContext createRuntimeContext(RequestHandlerInput input, TransactionRecord transactionRecord) {
 243         RuntimeContext runtimeContext;
 244         runtimeContext = new RuntimeContext();
 245         runtimeContext.setRequestContext(input.getRequestContext());
 246         runtimeContext.setTimeStart(transactionRecord.getStartTime());
 247         runtimeContext.setRpcName(input.getRpcName());
 248         runtimeContext.setTransactionRecord(transactionRecord);
 249         return runtimeContext;
 250     }
 251
 252     private TransactionRecord createTransactionRecord(RequestHandlerInput input) {
 253         Instant startTime = Instant.now();
 254         TransactionRecord record = new TransactionRecord();
 255         record.setTransactionId(UUID.randomUUID().toString());
 256         record.setRequestState(RequestStatus.RECEIVED);
 257         record.setRequestId(input.getRequestContext().getCommonHeader().getRequestId());
 258         record.setSubRequestId(input.getRequestContext().getCommonHeader().getSubRequestId());
 259         record.setOriginatorId(input.getRequestContext().getCommonHeader().getOriginatorId());
 260         record.setOriginTimestamp(input.getRequestContext().getCommonHeader().getTimeStamp().toInstant());
 261         record.setStartTime(startTime);
 262         record.setOperation(VNFOperation.valueOf(input.getRequestContext().getAction().name()));
 263         record.setTargetId(input.getRequestContext().getActionIdentifiers().getVnfId());
 264         record.setVnfcName(input.getRequestContext().getActionIdentifiers().getVnfcName());
 265         record.setVserverId(input.getRequestContext().getActionIdentifiers().getVserverId());
 266         record.setVfModuleId(input.getRequestContext().getActionIdentifiers().getVfModuleId());
 267         record.setServiceInstanceId(input.getRequestContext().getActionIdentifiers().getServiceInstanceId());
 268         Flags.Mode mode;
 269         if (input.getRequestContext().getCommonHeader().getFlags() != null &&
 270             input.getRequestContext().getCommonHeader().getFlags().getMode() != null) {
 271             mode = input.getRequestContext().getCommonHeader().getFlags().getMode();
 272         } else {
 273             mode = Flags.Mode.NORMAL;
 274         }
 275         record.setMode(mode);
 276         return record;
 277     }
 278
 279     private void recordAndClearLogProperties(RuntimeContext runtimeContext) {
 280         storeAuditLogRecord(runtimeContext);
 281         storeMetricLogRecord(runtimeContext);
 282         clearRequestLogProperties();
 283     }
 284
 285     void storeErrorMessageToLog(RuntimeContext runtimeContext, String targetEntity, String targetServiceName,
 286                                 String additionalMessage) {
 287         LoggingUtils.logErrorMessage(runtimeContext.getResponseContext().getStatus() != null ?
 288                 String.valueOf(runtimeContext.getResponseContext().getStatus().getCode()) : "",
 289             runtimeContext.getResponseContext().getStatus() != null ?
 290                 String.valueOf(runtimeContext.getResponseContext().getStatus().getMessage()) : "",
 291             targetEntity,
 292             targetServiceName,
 293             additionalMessage,
 294             this.getClass().getCanonicalName());
 295     }
 296
 297     protected abstract void handleRequest(RuntimeContext runtimeContext);
 298
 299     void fillStatus(RuntimeContext runtimeContext, LCMCommandStatus lcmCommandStatus, Params params) {
 300         runtimeContext.getResponseContext().getStatus().setCode(lcmCommandStatus.getResponseCode());
 301         runtimeContext.getResponseContext().getStatus().setMessage(lcmCommandStatus.getFormattedMessage(params));
 302     }
 303
 304     private void clearRequestLogProperties() {
 305         try {
 306             MDC.remove(MDC_KEY_REQUEST_ID);
 307             MDC.remove(MDC_SERVICE_INSTANCE_ID);
 308             MDC.remove(MDC_SERVICE_NAME);
 309             MDC.remove(LoggingConstants.MDCKeys.PARTNER_NAME);
 310             MDC.remove(LoggingConstants.MDCKeys.TARGET_VIRTUAL_ENTITY);
 311         } catch (Exception e) {
 312             logger.error("Error clearing MDC log properties. " + e.getMessage(), e);
 313         }
 314     }
 315
 316     private void setInitialLogProperties(RequestContext requestContext) {
 317
 318         try {
 319             MDC.put(MDC_KEY_REQUEST_ID, requestContext.getCommonHeader().getRequestId());
 320             if (requestContext.getActionIdentifiers().getServiceInstanceId() != null) {
 321                 MDC.put(MDC_SERVICE_INSTANCE_ID, requestContext.getActionIdentifiers().getServiceInstanceId());
 322             }
 323             MDC.put(LoggingConstants.MDCKeys.PARTNER_NAME, requestContext.getCommonHeader().getOriginatorId());
 324             MDC.put(MDC_INSTANCE_UUID, ""); // value should be created in the future
 325             //Don't change it to a.getHostName() again please. It's wrong!
 326             MDC.put(MDC_SERVER_FQDN, InetAddress.getLocalHost().getCanonicalHostName());
 327             MDC.put(MDC_SERVER_IP_ADDRESS, InetAddress.getLocalHost().getHostAddress());
 328             MDC.put(LoggingConstants.MDCKeys.SERVER_NAME, InetAddress.getLocalHost().getHostName());
 329             MDC.put(MDC_SERVICE_NAME, requestContext.getAction().name());
 330             MDC.put(LoggingConstants.MDCKeys.TARGET_VIRTUAL_ENTITY, requestContext.getActionIdentifiers().getVnfId());
 331         } catch (UnknownHostException e) {
 332             logger.error("Error occured while setting initial log properties", e);
 333         }
 334     }
 335
 336     private static RequestHandlerOutput buildRequestHandlerOutput(LCMCommandStatus response, Params params) {
 337         RequestHandlerOutput output = new RequestHandlerOutput();
 338         ResponseContext responseContext = new ResponseContext();
 339         org.onap.appc.domainmodel.lcm.Status status = new org.onap.appc.domainmodel.lcm.Status();
 340         status.setCode(response.getResponseCode());
 341         status.setMessage(response.getFormattedMessage(params));
 342         responseContext.setStatus(status);
 343         output.setResponseContext(responseContext);
 344         return output;
 345     }
 346
 347     /**
 348      * This method perform following operations required after execution of workflow.
 349      * It posts asynchronous response to message bus (DMaaP).
 350      * Unlock VNF Id
 351      * Removes request from request registry.
 352      * Generate audit logs.
 353      * Adds transaction record to database id if transaction logging is enabled.
 354      */
 355     @Override
 356     public void onRequestExecutionEnd(RuntimeContext runtimeContext) {
 357         if (logger.isTraceEnabled()) {
 358             logger.trace("Entering to onRequestExecutionEnd with runtimeContext = " +
 359                 ObjectUtils.toString(runtimeContext));
 360         }
 361         postMessageToDMaaP(runtimeContext.getRequestContext().getAction(), runtimeContext.getRpcName(),
 362             runtimeContext.getResponseContext());
 363         final int statusCode = runtimeContext.getResponseContext().getStatus().getCode();
 364         RequestStatus requestStatus =
 365             (statusCode == LCMCommandStatus.SUCCESS.getResponseCode()) ?
 366                 RequestStatus.SUCCESSFUL : RequestStatus.FAILED;
 367         runtimeContext.getTransactionRecord().setRequestState(requestStatus);
 368         runtimeContext.getTransactionRecord().setResultCode(runtimeContext.getResponseContext().getStatus().getCode());
 369         updateTransactionStatus(runtimeContext.getTransactionRecord());
 370         storeAuditLogRecord(runtimeContext);
 371     }
 372
 373     private void storeAuditLogRecord(RuntimeContext runtimeContext) {
 374         LoggingUtils.logAuditMessage(runtimeContext.getTimeStart(),
 375             Instant.now(),
 376             String.valueOf(runtimeContext.getResponseContext().getStatus().getCode()),
 377             runtimeContext.getResponseContext().getStatus().getMessage(),
 378             this.getClass().getCanonicalName());
 379     }
 380
 381     private void storeMetricLogRecord(RuntimeContext runtimeContext) {
 382         LoggingUtils.logMetricsMessage(runtimeContext.getTimeStart(),
 383             Instant.now(),
 384             LoggingConstants.TargetNames.APPC,
 385             runtimeContext.getRequestContext().getAction().name(),
 386             runtimeContext.getResponseContext().getStatus().getCode() == LCMCommandStatus.ACCEPTED.getResponseCode()
 387                 ? LoggingConstants.StatusCodes.COMPLETE : LoggingConstants.StatusCodes.ERROR,
 388             String.valueOf(runtimeContext.getResponseContext().getStatus().getCode()),
 389             runtimeContext.getResponseContext().getStatus().getMessage(),
 390             this.getClass().getCanonicalName());
 391     }
 392
 393     private void postMessageToDMaaP(VNFOperation operation, String rpcName, ResponseContext responseContext) {
 394         if (logger.isTraceEnabled()) {
 395             logger.trace("Entering to postMessageToDMaaP with AsyncResponse = " +
 396                 ObjectUtils.toString(responseContext));
 397         }
 398         logger.debug("In postMessageToDMaap before invoking post()");
 399         boolean callbackResponse = messageAdapter.post(operation, rpcName, responseContext);
 400         logger.debug("In postMessageToDMaap after invoking post()");
 401         if (!callbackResponse) {
 402             logger.error("DMaaP posting status: false", "dmaapMessage: " + responseContext);
 403         }
 404         if (logger.isTraceEnabled())
 405             logger.trace("Exiting from postMessageToDMaaP with (callbackResponse = " +
 406                 ObjectUtils.toString(callbackResponse) + ")");
 407     }
 408
 409     private void initMetric() {
 410         if (logger.isDebugEnabled())
 411             logger.debug("Metric getting initialized");
 412         MetricService metricService = getMetricservice();
 413         // Check for the metric service created before trying to create registry using
 414         // the metricService object
 415         if (metricService == null) {
 416             // Cannot find service reference for org.onap.appc.metricservice.MetricService
 417             throw new NullPointerException("org.onap.appc.metricservice.MetricService is null. " +
 418                     "Failed to init Metric");
 419         }
 420         metricRegistry = metricService.createRegistry("APPC");
 421         DispatchingFuntionMetric dispatchingFuntionMetric = metricRegistry.metricBuilderFactory().
 422             dispatchingFunctionCounterBuilder().
 423             withName("DISPATCH_FUNCTION").withType(MetricType.COUNTER).
 424             withAcceptRequestValue(0)
 425             .withRejectRequestValue(0)
 426             .build();
 427         if (metricRegistry.register(dispatchingFuntionMetric)) {
 428             Metric[] metrics = new Metric[]{dispatchingFuntionMetric};
 429             LogPublisher logPublisher = new LogPublisher(metricRegistry, metrics);
 430             LogPublisher[] logPublishers = new LogPublisher[1];
 431             logPublishers[0] = logPublisher;
 432             PublishingPolicy manuallyScheduledPublishingPolicy = metricRegistry.policyBuilderFactory()
 433                 .scheduledPolicyBuilder()
 434                 .withPublishers(logPublishers)
 435                 .withMetrics(metrics)
 436                 .build();
 437
 438             if (logger.isDebugEnabled())
 439                 logger.debug("Policy getting initialized");
 440             manuallyScheduledPublishingPolicy.init();
 441             if (logger.isDebugEnabled())
 442                 logger.debug("Metric initialized");
 443         }
 444     }
 445
 446     private MetricService getMetricservice() {
 447         BundleContext bctx = FrameworkUtil.getBundle(MetricService.class).getBundleContext();
 448         ServiceReference sref = bctx.getServiceReference(MetricService.class.getName());
 449         if (sref != null) {
 450             logger.info("Metric Service from bundlecontext");
 451             return (MetricService) bctx.getService(sref);
 452         } else {
 453             logger.info("Metric Service error from bundlecontext");
 454             logger.warn("Cannot find service reference for org.onap.appc.metricservice.MetricService");
 455             return null;
 456         }
 457     }
 458
 459     /**
 460      * This method returns the count of in progress requests
 461      * * @return in progress requests count
 462      */
 463     @Override
 464     public int getInprogressRequestCount() throws APPCException {
 465         if (logger.isTraceEnabled()) {
 466             logger.trace("Entering to getInprogressRequestCount");
 467         }
 468         return transactionRecorder.getInProgressRequestsCount();
 469     }
 470
 471     public static String dateToStringConverterMillis(Date date) {
 472         SimpleDateFormat customDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
 473         customDate.setTimeZone(TimeZone.getTimeZone("UTC"));
 474         if (date != null) {
 475             return customDate.format(date);
 476         }
 477         return null;
 478     }
 479 }