gerrit.onap Code Review - so.git/blob

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP - SO
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
   6  * Copyright (C) 2017 Huawei Technologies Co., Ltd. All rights reserved.
   7  * ================================================================================
   8  * Modifications Copyright (c) 2019 Samsung
   9  * ================================================================================
  10  * Licensed under the Apache License, Version 2.0 (the "License");
  11  * you may not use this file except in compliance with the License.
  12  * You may obtain a copy of the License at
  13  *
  14  *      http://www.apache.org/licenses/LICENSE-2.0
  15  *
  16  * Unless required by applicable law or agreed to in writing, software
  17  * distributed under the License is distributed on an "AS IS" BASIS,
  18  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  19  * See the License for the specific language governing permissions and
  20  * limitations under the License.
  21  * ============LICENSE_END=========================================================
  22  */
  23
  24 package org.onap.so.bpmn.common.workflow.service;
  25
  26 import java.util.HashMap;
  27 import java.util.List;
  28 import java.util.Map;
  29 import java.util.UUID;
  30 import java.util.concurrent.atomic.AtomicLong;
  31
  32 import javax.ws.rs.Consumes;
  33 import javax.ws.rs.POST;
  34 import javax.ws.rs.Path;
  35 import javax.ws.rs.PathParam;
  36 import javax.ws.rs.Produces;
  37 import javax.ws.rs.core.Context;
  38 import javax.ws.rs.core.Response;
  39 import javax.ws.rs.core.UriInfo;
  40
  41 import org.camunda.bpm.engine.HistoryService;
  42 import org.camunda.bpm.engine.ProcessEngineException;
  43 import org.camunda.bpm.engine.ProcessEngineServices;
  44 import org.camunda.bpm.engine.RuntimeService;
  45 import org.camunda.bpm.engine.history.HistoricVariableInstance;
  46 import org.camunda.bpm.engine.runtime.ProcessInstance;
  47 import org.camunda.bpm.engine.variable.VariableMap;
  48 import org.camunda.bpm.engine.variable.Variables;
  49 import org.camunda.bpm.engine.variable.Variables.SerializationDataFormats;
  50 import org.camunda.bpm.engine.variable.impl.VariableMapImpl;
  51 import org.onap.so.bpmn.common.workflow.context.WorkflowResponse;
  52 import org.onap.so.bpmn.core.WorkflowException;
  53 import org.onap.so.logger.MessageEnum;
  54 import org.onap.so.logger.MsoLogger;
  55 import org.slf4j.Logger;
  56 import org.slf4j.LoggerFactory;
  57 import org.slf4j.MDC;
  58 import org.springframework.stereotype.Component;
  59
  60 import io.swagger.annotations.Api;
  61 import io.swagger.annotations.ApiOperation;
  62
  63 @Path("/workflow")
  64 @Api(value = "/workflow", description = "Root of workflow services")
  65 @Component
  66 public class WorkflowResource extends ProcessEngineAwareService {
  67
  68         private static final Logger logger = LoggerFactory.getLogger(WorkflowResource.class);
  69         private static final String LOGMARKER = "[WRKFLOW-RESOURCE]";
  70
  71         private static final int DEFAULT_WAIT_TIME = 30000;
  72
  73         @Context
  74         private UriInfo uriInfo = null;
  75
  76         /**
  77          * Starts the process instance and responds to client synchronously
  78          * If the request does not contain mso-service-request-timeout then it waits for the value specified in DEFAULT_WAIT_TIME
  79          * Note: value specified in mso-service-request-timeout is in seconds
  80          * During polling time, if there is an exception encountered in the process execution then polling is stopped and the error response is
  81          * returned to the client
  82          * @param processKey
  83          * @param variableMap
  84          * @return
  85          */
  86         @POST
  87         @Path("/services/{processKey}")
  88         @ApiOperation(
  89                 value = "Starts a new process with the appropriate process synchronously",
  90                 notes = "d"
  91             )
  92         @Produces("application/json")
  93         @Consumes("application/json")
  94         public Response startProcessInstanceByKey(@PathParam("processKey") String processKey,
  95                         VariableMapImpl variableMap) {
  96
  97                 Map<String, Object> inputVariables = getInputVariables(variableMap);
  98                 setLogContext(processKey, inputVariables);
  99
 100                 WorkflowResponse workflowResponse = new WorkflowResponse();
 101                 long startTime = System.currentTimeMillis();
 102                 ProcessInstance processInstance = null;
 103
 104                 try {
 105                         //Kickoff the process
 106                         ProcessThread thread = new ProcessThread(inputVariables,processKey);
 107                         thread.start();
 108
 109                         Map<String, Object> responseMap = null;
 110
 111                         //wait for process to be completed
 112                         long waitTime = getWaitTime(inputVariables);
 113                         long now = System.currentTimeMillis();
 114                         long start = now;
 115                         long endTime = start + waitTime;
 116                         long pollingInterval = 500;
 117
 118                         // TEMPORARY LOGIC FOR UNIT TEST REFACTORING
 119                         // If this is a unit test (method is invoked directly), wait a max
 120                         // of 5 seconds after process ended for a result.  In production,
 121                         // wait up to 60 seconds.
 122                         long timeToWaitAfterProcessEnded = uriInfo == null ? 5000 : 60000;
 123                         AtomicLong timeProcessEnded = new AtomicLong(0);
 124                         boolean endedWithNoResponse = false;
 125
 126                         while (now <= endTime) {
 127                                 Thread.sleep(pollingInterval);
 128
 129                                 now = System.currentTimeMillis();
 130
 131                                 // Increase the polling interval over time
 132
 133                                 long elapsed = now - start;
 134
 135                                 if (elapsed > 60000) {
 136                                         pollingInterval = 5000;
 137                                 } else if (elapsed > 10000) {
 138                                         pollingInterval = 1000;
 139                                 }
 140                                 Exception exception = thread.getException();
 141                                 if (exception != null) {
 142                                         throw new Exception(exception);
 143                                 }
 144
 145                                 processInstance = thread.getProcessInstance();
 146
 147                                 if (processInstance == null) {
 148                                         logger.debug("{} process has not been created yet", LOGMARKER + processKey );
 149                                         continue;
 150                                 }
 151
 152                                 String processInstanceId = processInstance.getId();
 153                                 workflowResponse.setProcessInstanceID(processInstanceId);
 154
 155                                 responseMap = getResponseMap(processInstance, processKey, timeProcessEnded);
 156
 157                                 if (responseMap == null) {
 158                                         logger.debug("{} has not produced a response yet", LOGMARKER + processKey);
 159
 160                                         if (timeProcessEnded.longValue() != 0) {
 161                                                 long elapsedSinceEnded = System.currentTimeMillis() - timeProcessEnded.longValue();
 162
 163                                                 if (elapsedSinceEnded > timeToWaitAfterProcessEnded) {
 164                                                         endedWithNoResponse = true;
 165                                                         break;
 166                                                 }
 167                                         }
 168                                 } else {
 169                                         processResponseMap(workflowResponse, responseMap);
 170                                         recordEvents(processKey, workflowResponse, startTime);
 171                                         return Response.status(workflowResponse.getMessageCode()).entity(workflowResponse).build();
 172                                 }
 173                         }
 174
 175                         //if we dont get response after waiting then send timeout response
 176
 177                         String state;
 178                         String processInstanceId;
 179
 180                         if (processInstance == null) {
 181                                 processInstanceId = "N/A";
 182                                 state = "NOT STARTED";
 183                         } else {
 184                                 processInstanceId = processInstance.getProcessInstanceId();
 185                                 state = isProcessEnded(processInstanceId) ? "ENDED" : "NOT ENDED";
 186                         }
 187
 188                         workflowResponse.setMessage("Fail");
 189                         if (endedWithNoResponse) {
 190                                 workflowResponse.setResponse("Process ended without producing a response");
 191                         } else {
 192                                 workflowResponse.setResponse("Request timed out, process state: " + state);
 193                         }
 194                         workflowResponse.setProcessInstanceID(processInstanceId);
 195                         recordEvents(processKey, workflowResponse, startTime);
 196                         workflowResponse.setMessageCode(500);
 197                         return Response.status(500).entity(workflowResponse).build();
 198                 } catch (Exception ex) {
 199                         logger.debug(LOGMARKER + "Exception in startProcessInstance by key",ex);
 200                         workflowResponse.setMessage("Fail" );
 201                         workflowResponse.setResponse("Error occurred while executing the process: " + ex.getMessage());
 202                         if (processInstance != null) workflowResponse.setProcessInstanceID(processInstance.getId());
 203
 204                         logger.error("{} {} {} {} {}", MessageEnum.BPMN_GENERAL_EXCEPTION_ARG.toString(), "BPMN", MDC.get(processKey),
 205                                 MsoLogger.ErrorCode.UnknownError.getValue(),
 206                                 LOGMARKER + workflowResponse.getMessage() + " for processKey: " + processKey + " with response: "
 207                                         + workflowResponse.getResponse());
 208
 209                         workflowResponse.setMessageCode(500);
 210                         recordEvents(processKey, workflowResponse, startTime);
 211                         return Response.status(500).entity(workflowResponse).build();
 212                 }
 213         }
 214
 215         /**
 216          * Returns the wait time, this is used by the resource on how long it should wait to send a response
 217          * If none specified DEFAULT_WAIT_TIME is used
 218          * @param inputVariables
 219          * @return
 220          */
 221         private int getWaitTime(Map<String, Object> inputVariables)
 222         {
 223                 String timeout = inputVariables.get("mso-service-request-timeout") == null
 224                         ? null : inputVariables.get("mso-service-request-timeout").toString();
 225
 226                 if (timeout != null) {
 227                         try {
 228                                 return Integer.parseInt(timeout)*1000;
 229                         } catch (NumberFormatException nex) {
 230                                 logger.debug("Invalid input for mso-service-request-timeout");
 231                         }
 232                 }
 233                 return DEFAULT_WAIT_TIME;
 234         }
 235
 236         private void recordEvents(String processKey, WorkflowResponse response, long startTime) {
 237         }
 238
 239         private void setLogContext(String processKey, Map<String, Object> inputVariables) {
 240                 MsoLogger.setServiceName("MSO." + processKey);
 241                 if (inputVariables != null) {
 242                         MsoLogger.setLogContext(getValueFromInputVariables(inputVariables, "mso-request-id"),
 243                                 getValueFromInputVariables(inputVariables, "mso-service-instance-id"));
 244                 }
 245         }
 246
 247         private String getValueFromInputVariables(Map<String,Object> inputVariables, String key) {
 248                 Object value = inputVariables.get(key);
 249                 if (value == null) {
 250                         return "N/A";
 251                 } else {
 252                         return value.toString();
 253                 }
 254         }
 255
 256         /**
 257          * Checks to see if the specified process is ended.
 258          * @param processInstanceId the process instance ID
 259          * @return true if the process is ended
 260          */
 261         private boolean isProcessEnded(String processInstanceId) {
 262                 ProcessEngineServices pes = getProcessEngineServices();
 263                 try {
 264                         return pes.getRuntimeService().createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult() == null ? true : false ;
 265                 } catch (Exception e) {
 266                         logger.debug("Exception :",e);
 267                         return true;
 268                 }
 269         }
 270
 271         private void processResponseMap(WorkflowResponse workflowResponse, Map<String, Object> responseMap) {
 272                 Object object = responseMap.get("Response");
 273                 String response = object == null ? null : String.valueOf(object);
 274                 if(response == null){
 275                         object = responseMap.get("WorkflowResponse");
 276                         response = object == null ? null : String.valueOf(object);
 277                 }
 278
 279                 workflowResponse.setResponse(response);
 280
 281                 object = responseMap.get("ResponseCode");
 282                 String responseCode = object == null ? null : String.valueOf(object);
 283
 284                 try {
 285                         workflowResponse.setMessageCode(Integer.parseInt(responseCode));
 286                 } catch(NumberFormatException nex) {
 287                         logger.debug(LOGMARKER + "Failed to parse ResponseCode: " + responseCode);
 288                         workflowResponse.setMessageCode(-1);
 289                 }
 290
 291                 Object status = responseMap.get("Status");
 292
 293                 if ("Success".equalsIgnoreCase(String.valueOf(status))) {
 294                         workflowResponse.setMessage("Success");
 295                 } else if ("Fail".equalsIgnoreCase(String.valueOf(status))) {
 296                         workflowResponse.setMessage("Fail");
 297                 } else {
 298                         logger.debug(LOGMARKER + "Unrecognized Status: " + responseCode);
 299                         workflowResponse.setMessage("Fail");
 300                 }
 301         }
 302
 303         /**
 304          * @version 1.0
 305          * Triggers the workflow in a separate thread
 306          */
 307         private class ProcessThread extends Thread {
 308                 private final Map<String,Object> inputVariables;
 309                 private final String processKey;
 310                 private final String businessKey;
 311                 private ProcessInstance processInstance = null;
 312                 private Exception exception = null;
 313
 314                 public ProcessThread(Map<String, Object> inputVariables, String processKey) {
 315                         this.inputVariables = inputVariables;
 316                         this.processKey = processKey;
 317                         this.businessKey = UUID.randomUUID().toString();
 318                 }
 319
 320                 /**
 321                  * If an exception occurs when starting the process instance, it may
 322                  * be obtained by calling this method.  Note that exceptions are only
 323                  * recorded while the process is executing in its original thread.
 324                  * Once a process is suspended, exception recording stops.
 325                  * @return the exception, or null if none has occurred
 326                  */
 327                 public Exception getException() {
 328                         return exception;
 329                 }
 330
 331
 332                 public ProcessInstance getProcessInstance() {
 333                         return this.processInstance;
 334                 }
 335
 336                 /**
 337                  * Sets the process instance exception.
 338                  * @param exception the exception
 339                  */
 340                 private void setException(Exception exception) {
 341                         this.exception = exception;
 342                 }
 343
 344                 public void run() {
 345                         setLogContext(processKey, inputVariables);
 346
 347                         long startTime = System.currentTimeMillis();
 348
 349                         try {
 350
 351                                 RuntimeService runtimeService = getProcessEngineServices().getRuntimeService();
 352
 353                                 // Note that this method doesn't return until the process suspends
 354                                 // itself or finishes.  We provide a business key so we can identify
 355                                 // the process instance immediately.
 356                                 processInstance = runtimeService.startProcessInstanceByKey(
 357                                         processKey, inputVariables);
 358
 359                         } catch (Exception e) {
 360                                 logger.debug(LOGMARKER + "ProcessThread caught an exception executing "
 361                                         + processKey + ": " + e);
 362                                 setException(e);
 363                         }
 364                 }
 365
 366         }
 367
 368         private Map<String, Object> getInputVariables(VariableMapImpl variableMap) {
 369                 VariableMap inputVariables = Variables.createVariables();
 370                 @SuppressWarnings("unchecked")
 371                 Map<String, Object> vMap = (Map<String, Object>) variableMap.get("variables");
 372                 for (String key : vMap.keySet()) { //variabe name vn
 373                         @SuppressWarnings("unchecked")
 374                         Map<String, Object> valueMap = (Map<String,Object>)vMap.get(key); //value, type
 375                         inputVariables.putValueTyped(key, Variables
 376                         .objectValue(valueMap.get("value"))
 377                         .serializationDataFormat(SerializationDataFormats.JAVA) // tells the engine to use java serialization for persisting the value
 378                         .create());
 379                 }
 380                 return inputVariables;
 381         }
 382
 383         /**
 384          * Attempts to get a response map from the specified process instance.
 385          * @return the response map, or null if it is unavailable
 386          */
 387         private Map<String, Object> getResponseMap(ProcessInstance processInstance,
 388                         String processKey, AtomicLong timeProcessEnded) {
 389
 390                 String responseMapVariable = processKey + "ResponseMap";
 391                 String processInstanceId = processInstance.getId();
 392
 393                 // Query the runtime service to see if a response map is ready.
 394
 395 /*              RuntimeService runtimeService = getProcessEngineServices().getRuntimeService();
 396                 List<Execution> executions = runtimeService.createExecutionQuery()
 397                         .processInstanceId(processInstanceId).list();
 398
 399                 for (Execution execution : executions) {
 400                         @SuppressWarnings("unchecked")
 401                         Map<String, Object> responseMap = (Map<String, Object>)
 402                                 getVariableFromExecution(runtimeService, execution.getId(),
 403                                         responseMapVariable);
 404
 405                         if (responseMap != null) {
 406                                 msoLogger.debug(LOGMARKER + "Obtained " + responseMapVariable
 407                                         + " from process " + processInstanceId + " execution "
 408                                         + execution.getId());
 409                                 return responseMap;
 410                         }
 411                 }
 412 */
 413                 //Querying history seem to return consistent results compared to querying the runtime service
 414
 415                 boolean alreadyEnded = timeProcessEnded.longValue() != 0;
 416
 417                 if (alreadyEnded || isProcessEnded(processInstance.getId())) {
 418                         if (!alreadyEnded) {
 419                                 timeProcessEnded.set(System.currentTimeMillis());
 420                         }
 421
 422                         // Query the history service to see if a response map exists.
 423
 424                         HistoryService historyService = getProcessEngineServices().getHistoryService();
 425                         @SuppressWarnings("unchecked")
 426                         Map<String, Object> responseMap = (Map<String, Object>)
 427                                 getVariableFromHistory(historyService, processInstance.getId(),
 428                                         responseMapVariable);
 429
 430                         if (responseMap != null) {
 431                                 logger.debug(LOGMARKER + "Obtained " + responseMapVariable
 432                                         + " from process " + processInstanceId + " history");
 433                                 return responseMap;
 434                         }
 435
 436                         // Query the history service for old-style response variables.
 437
 438                         String prefix = (String) getVariableFromHistory(historyService, processInstanceId, "prefix");
 439
 440                         if (prefix != null) {
 441
 442                                 // Check for 'WorkflowResponse' variable
 443                                 Object workflowResponseObject = getVariableFromHistory(historyService, processInstanceId, "WorkflowResponse");
 444                                 String workflowResponse = workflowResponseObject == null ? null : String.valueOf(workflowResponseObject);
 445                                 logger.debug(LOGMARKER + "WorkflowResponse: " + workflowResponse);
 446
 447                                 if (workflowResponse != null) {
 448                                         Object responseCodeObject = getVariableFromHistory(historyService, processInstanceId, prefix + "ResponseCode");
 449                                         String responseCode = responseCodeObject == null ? null : String.valueOf(responseCodeObject);
 450                                         logger.debug(LOGMARKER + prefix + "ResponseCode: " + responseCode);
 451                                         responseMap = new HashMap<>();
 452                                         responseMap.put("WorkflowResponse", workflowResponse);
 453                                         responseMap.put("ResponseCode", responseCode);
 454                                         responseMap.put("Status", "Success");
 455                                         return responseMap;
 456                                 }
 457
 458
 459                                 // Check for 'WorkflowException' variable
 460                                 WorkflowException workflowException = null;
 461                                 String workflowExceptionText = null;
 462
 463                                 Object workflowExceptionObject = getVariableFromHistory(historyService, processInstanceId, "WorkflowException");
 464                                 if(workflowExceptionObject != null) {
 465                                         if(workflowExceptionObject instanceof WorkflowException) {
 466                                                 workflowException = (WorkflowException) workflowExceptionObject;
 467                                                 workflowExceptionText = workflowException.toString();
 468                                                 responseMap = new HashMap<>();
 469                                                 responseMap.put("WorkflowException", workflowExceptionText);
 470                                                 responseMap.put("ResponseCode", workflowException.getErrorCode());
 471                                                 responseMap.put("Status", "Fail");
 472                                                 return responseMap;
 473                                         }
 474                                         else if (workflowExceptionObject instanceof String) {
 475                                                 Object object = getVariableFromHistory(historyService, processInstanceId, prefix + "ResponseCode");
 476                                                 String responseCode = object == null ? null : String.valueOf(object);
 477                                                 workflowExceptionText = (String) workflowExceptionObject;
 478                                                 responseMap = new HashMap<>();
 479                                                 responseMap.put("WorkflowException", workflowExceptionText);
 480                                                 responseMap.put("ResponseCode", responseCode);
 481                                                 responseMap.put("Status", "Fail");
 482                                                 return responseMap;
 483                                         }
 484
 485                                 }
 486                                 logger.debug(LOGMARKER + "WorkflowException: " + workflowExceptionText);
 487
 488                                 // BEGIN LEGACY SUPPORT.  TODO: REMOVE THIS CODE
 489                                 Object object = getVariableFromHistory(historyService, processInstanceId, processKey + "Response");
 490                                 String response = object == null ? null : String.valueOf(object);
 491                                 logger.debug(LOGMARKER + processKey + "Response: " + response);
 492
 493                                 if (response != null) {
 494                                         object = getVariableFromHistory(historyService, processInstanceId, prefix + "ResponseCode");
 495                                         String responseCode = object == null ? null : String.valueOf(object);
 496                                         logger.debug(LOGMARKER + prefix + "ResponseCode: " + responseCode);
 497                                         responseMap = new HashMap<>();
 498                                         responseMap.put("Response", response);
 499                                         responseMap.put("ResponseCode", responseCode);
 500                                         responseMap.put("Status", "Success");
 501                                         return responseMap;
 502                                 }
 503
 504                                 object = getVariableFromHistory(historyService, processInstanceId, prefix + "ErrorResponse");
 505                                 String errorResponse = object == null ? null : String.valueOf(object);
 506                                 logger.debug(LOGMARKER + prefix + "ErrorResponse: " + errorResponse);
 507
 508                                 if (errorResponse != null) {
 509                                         object = getVariableFromHistory(historyService, processInstanceId, prefix + "ResponseCode");
 510                                         String responseCode = object == null ? null : String.valueOf(object);
 511                                         logger.debug(LOGMARKER + prefix + "ResponseCode: " + responseCode);
 512                                         responseMap = new HashMap<>();
 513                                         responseMap.put("Response", errorResponse);
 514                                         responseMap.put("ResponseCode", responseCode);
 515                                         responseMap.put("Status", "Fail");
 516                                         return responseMap;
 517                                 }
 518                                 // END LEGACY SUPPORT.  TODO: REMOVE THIS CODE
 519                         }
 520                 }
 521                 return null;
 522         }
 523
 524         /**
 525          * Gets a variable value from the specified execution.
 526          * @return the variable value, or null if the variable could not be
 527          * obtained
 528          */
 529         private Object getVariableFromExecution(RuntimeService runtimeService,
 530                         String executionId, String variableName) {
 531                 try {
 532                         return runtimeService.getVariable(executionId, variableName);
 533                 } catch (ProcessEngineException e) {
 534                         // Most likely cause is that the execution no longer exists.
 535                         logger.debug("Error retrieving execution " + executionId
 536                                 + " variable " + variableName + ": " + e);
 537                         return null;
 538                 }
 539         }
 540         /**
 541          * Gets a variable value from specified historical process instance.
 542          * @return the variable value, or null if the variable could not be
 543          * obtained
 544          */
 545         private Object getVariableFromHistory(HistoryService historyService,
 546                         String processInstanceId, String variableName) {
 547                 try {
 548                         HistoricVariableInstance v = historyService.createHistoricVariableInstanceQuery()
 549                                 .processInstanceId(processInstanceId).variableName(variableName).singleResult();
 550                         return v == null ? null : v.getValue();
 551                 } catch (Exception e) {
 552                         logger.debug("Error retrieving process {} variable {} from history: ", processInstanceId,
 553                                 variableName, e);
 554                         return null;
 555                 }
 556         }
 557
 558         @POST
 559         @Path("/services/{processKey}/{processInstanceId}")
 560         @Produces("application/json")
 561         @Consumes("application/json")
 562         @ApiOperation(
 563                 value = "Allows for retrieval of the variables for a given process",
 564                 notes = ""
 565             )
 566         public WorkflowResponse getProcessVariables(@PathParam("processKey") String processKey, @PathParam("processInstanceId") String processInstanceId) {
 567                 //TODO filter only set of variables
 568                 WorkflowResponse response = new WorkflowResponse();
 569
 570                 long startTime = System.currentTimeMillis();
 571                 try {
 572                         ProcessEngineServices engine = getProcessEngineServices();
 573                         List<HistoricVariableInstance> variables = engine.getHistoryService().createHistoricVariableInstanceQuery().processInstanceId(processInstanceId).list();
 574                         Map<String,String> variablesMap = new HashMap<>();
 575                         for (HistoricVariableInstance variableInstance: variables) {
 576                                 variablesMap.put(variableInstance.getName(), variableInstance.getValue().toString());
 577                         }
 578
 579                         logger.debug(LOGMARKER + "***Received MSO getProcessVariables with processKey:" + processKey + " and variables: " +
 580                                 variablesMap.toString());
 581
 582                         response.setVariables(variablesMap);
 583                         response.setMessage("Success");
 584                         response.setResponse("Successfully retrieved the variables");
 585                         response.setProcessInstanceID(processInstanceId);
 586
 587                         logger.debug(LOGMARKER + response.getMessage() + " for processKey: " + processKey + " with response: " + response
 588                                 .getResponse());
 589                 } catch (Exception ex) {
 590                         response.setMessage("Fail");
 591                         response.setResponse("Failed to retrieve the variables," + ex.getMessage());
 592                         response.setProcessInstanceID(processInstanceId);
 593
 594                         logger.error("{} {} {} {} {}", MessageEnum.BPMN_GENERAL_EXCEPTION_ARG.toString(), "BPMN", MDC.get(processKey),
 595                                 MsoLogger.ErrorCode.UnknownError.getValue(),
 596                                 LOGMARKER + response.getMessage() + " for processKey: " + processKey + " with response: " + response
 597                                         .getResponse());
 598                         logger.debug("Exception :",ex);
 599                 }
 600                 return response;
 601         }
 602 }