bpmn/mso-infrastructure-bpmn/src/main/java/org/onap/so/bpmn/common/workflow/service/WorkflowResource.java

   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.ErrorCode;
  54 import org.onap.so.logger.MessageEnum;
  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                                 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         }
 241
 242         private String getValueFromInputVariables(Map<String,Object> inputVariables, String key) {
 243                 Object value = inputVariables.get(key);
 244                 if (value == null) {
 245                         return "N/A";
 246                 } else {
 247                         return value.toString();
 248                 }
 249         }
 250
 251         /**
 252          * Checks to see if the specified process is ended.
 253          * @param processInstanceId the process instance ID
 254          * @return true if the process is ended
 255          */
 256         private boolean isProcessEnded(String processInstanceId) {
 257                 ProcessEngineServices pes = getProcessEngineServices();
 258                 try {
 259                         return pes.getRuntimeService().createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult() == null ? true : false ;
 260                 } catch (Exception e) {
 261                         logger.debug("Exception :",e);
 262                         return true;
 263                 }
 264         }
 265
 266         private void processResponseMap(WorkflowResponse workflowResponse, Map<String, Object> responseMap) {
 267                 Object object = responseMap.get("Response");
 268                 String response = object == null ? null : String.valueOf(object);
 269                 if(response == null){
 270                         object = responseMap.get("WorkflowResponse");
 271                         response = object == null ? null : String.valueOf(object);
 272                 }
 273
 274                 workflowResponse.setResponse(response);
 275
 276                 object = responseMap.get("ResponseCode");
 277                 String responseCode = object == null ? null : String.valueOf(object);
 278
 279                 try {
 280                         workflowResponse.setMessageCode(Integer.parseInt(responseCode));
 281                 } catch(NumberFormatException nex) {
 282                         logger.debug(LOGMARKER + "Failed to parse ResponseCode: " + responseCode);
 283                         workflowResponse.setMessageCode(-1);
 284                 }
 285
 286                 Object status = responseMap.get("Status");
 287
 288                 if ("Success".equalsIgnoreCase(String.valueOf(status))) {
 289                         workflowResponse.setMessage("Success");
 290                 } else if ("Fail".equalsIgnoreCase(String.valueOf(status))) {
 291                         workflowResponse.setMessage("Fail");
 292                 } else {
 293                         logger.debug(LOGMARKER + "Unrecognized Status: " + responseCode);
 294                         workflowResponse.setMessage("Fail");
 295                 }
 296         }
 297
 298         /**
 299          * @version 1.0
 300          * Triggers the workflow in a separate thread
 301          */
 302         private class ProcessThread extends Thread {
 303                 private final Map<String,Object> inputVariables;
 304                 private final String processKey;
 305                 private final String businessKey;
 306                 private ProcessInstance processInstance = null;
 307                 private Exception exception = null;
 308
 309                 public ProcessThread(Map<String, Object> inputVariables, String processKey) {
 310                         this.inputVariables = inputVariables;
 311                         this.processKey = processKey;
 312                         this.businessKey = UUID.randomUUID().toString();
 313                 }
 314
 315                 /**
 316                  * If an exception occurs when starting the process instance, it may
 317                  * be obtained by calling this method.  Note that exceptions are only
 318                  * recorded while the process is executing in its original thread.
 319                  * Once a process is suspended, exception recording stops.
 320                  * @return the exception, or null if none has occurred
 321                  */
 322                 public Exception getException() {
 323                         return exception;
 324                 }
 325
 326
 327                 public ProcessInstance getProcessInstance() {
 328                         return this.processInstance;
 329                 }
 330
 331                 /**
 332                  * Sets the process instance exception.
 333                  * @param exception the exception
 334                  */
 335                 private void setException(Exception exception) {
 336                         this.exception = exception;
 337                 }
 338
 339                 public void run() {
 340                         setLogContext(processKey, inputVariables);
 341
 342                         long startTime = System.currentTimeMillis();
 343
 344                         try {
 345
 346                                 RuntimeService runtimeService = getProcessEngineServices().getRuntimeService();
 347
 348                                 // Note that this method doesn't return until the process suspends
 349                                 // itself or finishes.  We provide a business key so we can identify
 350                                 // the process instance immediately.
 351                                 processInstance = runtimeService.startProcessInstanceByKey(
 352                                         processKey, inputVariables);
 353
 354                         } catch (Exception e) {
 355                                 logger.debug(LOGMARKER + "ProcessThread caught an exception executing "
 356                                         + processKey + ": " + e);
 357                                 setException(e);
 358                         }
 359                 }
 360
 361         }
 362
 363         private Map<String, Object> getInputVariables(VariableMapImpl variableMap) {
 364                 VariableMap inputVariables = Variables.createVariables();
 365                 @SuppressWarnings("unchecked")
 366                 Map<String, Object> vMap = (Map<String, Object>) variableMap.get("variables");
 367                 for (String key : vMap.keySet()) { //variabe name vn
 368                         @SuppressWarnings("unchecked")
 369                         Map<String, Object> valueMap = (Map<String,Object>)vMap.get(key); //value, type
 370                         inputVariables.putValueTyped(key, Variables
 371                         .objectValue(valueMap.get("value"))
 372                         .serializationDataFormat(SerializationDataFormats.JAVA) // tells the engine to use java serialization for persisting the value
 373                         .create());
 374                 }
 375                 return inputVariables;
 376         }
 377
 378         /**
 379          * Attempts to get a response map from the specified process instance.
 380          * @return the response map, or null if it is unavailable
 381          */
 382         private Map<String, Object> getResponseMap(ProcessInstance processInstance,
 383                         String processKey, AtomicLong timeProcessEnded) {
 384
 385                 String responseMapVariable = processKey + "ResponseMap";
 386                 String processInstanceId = processInstance.getId();
 387
 388                 // Query the runtime service to see if a response map is ready.
 389
 390 /*              RuntimeService runtimeService = getProcessEngineServices().getRuntimeService();
 391                 List<Execution> executions = runtimeService.createExecutionQuery()
 392                         .processInstanceId(processInstanceId).list();
 393
 394                 for (Execution execution : executions) {
 395                         @SuppressWarnings("unchecked")
 396                         Map<String, Object> responseMap = (Map<String, Object>)
 397                                 getVariableFromExecution(runtimeService, execution.getId(),
 398                                         responseMapVariable);
 399
 400                         if (responseMap != null) {
 401                                 msoLogger.debug(LOGMARKER + "Obtained " + responseMapVariable
 402                                         + " from process " + processInstanceId + " execution "
 403                                         + execution.getId());
 404                                 return responseMap;
 405                         }
 406                 }
 407 */
 408                 //Querying history seem to return consistent results compared to querying the runtime service
 409
 410                 boolean alreadyEnded = timeProcessEnded.longValue() != 0;
 411
 412                 if (alreadyEnded || isProcessEnded(processInstance.getId())) {
 413                         if (!alreadyEnded) {
 414                                 timeProcessEnded.set(System.currentTimeMillis());
 415                         }
 416
 417                         // Query the history service to see if a response map exists.
 418
 419                         HistoryService historyService = getProcessEngineServices().getHistoryService();
 420                         @SuppressWarnings("unchecked")
 421                         Map<String, Object> responseMap = (Map<String, Object>)
 422                                 getVariableFromHistory(historyService, processInstance.getId(),
 423                                         responseMapVariable);
 424
 425                         if (responseMap != null) {
 426                                 logger.debug(LOGMARKER + "Obtained " + responseMapVariable
 427                                         + " from process " + processInstanceId + " history");
 428                                 return responseMap;
 429                         }
 430
 431                         // Query the history service for old-style response variables.
 432
 433                         String prefix = (String) getVariableFromHistory(historyService, processInstanceId, "prefix");
 434
 435                         if (prefix != null) {
 436
 437                                 // Check for 'WorkflowResponse' variable
 438                                 Object workflowResponseObject = getVariableFromHistory(historyService, processInstanceId, "WorkflowResponse");
 439                                 String workflowResponse = workflowResponseObject == null ? null : String.valueOf(workflowResponseObject);
 440                                 logger.debug(LOGMARKER + "WorkflowResponse: " + workflowResponse);
 441
 442                                 if (workflowResponse != null) {
 443                                         Object responseCodeObject = getVariableFromHistory(historyService, processInstanceId, prefix + "ResponseCode");
 444                                         String responseCode = responseCodeObject == null ? null : String.valueOf(responseCodeObject);
 445                                         logger.debug(LOGMARKER + prefix + "ResponseCode: " + responseCode);
 446                                         responseMap = new HashMap<>();
 447                                         responseMap.put("WorkflowResponse", workflowResponse);
 448                                         responseMap.put("ResponseCode", responseCode);
 449                                         responseMap.put("Status", "Success");
 450                                         return responseMap;
 451                                 }
 452
 453
 454                                 // Check for 'WorkflowException' variable
 455                                 WorkflowException workflowException = null;
 456                                 String workflowExceptionText = null;
 457
 458                                 Object workflowExceptionObject = getVariableFromHistory(historyService, processInstanceId, "WorkflowException");
 459                                 if(workflowExceptionObject != null) {
 460                                         if(workflowExceptionObject instanceof WorkflowException) {
 461                                                 workflowException = (WorkflowException) workflowExceptionObject;
 462                                                 workflowExceptionText = workflowException.toString();
 463                                                 responseMap = new HashMap<>();
 464                                                 responseMap.put("WorkflowException", workflowExceptionText);
 465                                                 responseMap.put("ResponseCode", workflowException.getErrorCode());
 466                                                 responseMap.put("Status", "Fail");
 467                                                 return responseMap;
 468                                         }
 469                                         else if (workflowExceptionObject instanceof String) {
 470                                                 Object object = getVariableFromHistory(historyService, processInstanceId, prefix + "ResponseCode");
 471                                                 String responseCode = object == null ? null : String.valueOf(object);
 472                                                 workflowExceptionText = (String) workflowExceptionObject;
 473                                                 responseMap = new HashMap<>();
 474                                                 responseMap.put("WorkflowException", workflowExceptionText);
 475                                                 responseMap.put("ResponseCode", responseCode);
 476                                                 responseMap.put("Status", "Fail");
 477                                                 return responseMap;
 478                                         }
 479
 480                                 }
 481                                 logger.debug(LOGMARKER + "WorkflowException: " + workflowExceptionText);
 482
 483                                 // BEGIN LEGACY SUPPORT.  TODO: REMOVE THIS CODE
 484                                 Object object = getVariableFromHistory(historyService, processInstanceId, processKey + "Response");
 485                                 String response = object == null ? null : String.valueOf(object);
 486                                 logger.debug(LOGMARKER + processKey + "Response: " + response);
 487
 488                                 if (response != null) {
 489                                         object = getVariableFromHistory(historyService, processInstanceId, prefix + "ResponseCode");
 490                                         String responseCode = object == null ? null : String.valueOf(object);
 491                                         logger.debug(LOGMARKER + prefix + "ResponseCode: " + responseCode);
 492                                         responseMap = new HashMap<>();
 493                                         responseMap.put("Response", response);
 494                                         responseMap.put("ResponseCode", responseCode);
 495                                         responseMap.put("Status", "Success");
 496                                         return responseMap;
 497                                 }
 498
 499                                 object = getVariableFromHistory(historyService, processInstanceId, prefix + "ErrorResponse");
 500                                 String errorResponse = object == null ? null : String.valueOf(object);
 501                                 logger.debug(LOGMARKER + prefix + "ErrorResponse: " + errorResponse);
 502
 503                                 if (errorResponse != null) {
 504                                         object = getVariableFromHistory(historyService, processInstanceId, prefix + "ResponseCode");
 505                                         String responseCode = object == null ? null : String.valueOf(object);
 506                                         logger.debug(LOGMARKER + prefix + "ResponseCode: " + responseCode);
 507                                         responseMap = new HashMap<>();
 508                                         responseMap.put("Response", errorResponse);
 509                                         responseMap.put("ResponseCode", responseCode);
 510                                         responseMap.put("Status", "Fail");
 511                                         return responseMap;
 512                                 }
 513                                 // END LEGACY SUPPORT.  TODO: REMOVE THIS CODE
 514                         }
 515                 }
 516                 return null;
 517         }
 518
 519         /**
 520          * Gets a variable value from the specified execution.
 521          * @return the variable value, or null if the variable could not be
 522          * obtained
 523          */
 524         private Object getVariableFromExecution(RuntimeService runtimeService,
 525                         String executionId, String variableName) {
 526                 try {
 527                         return runtimeService.getVariable(executionId, variableName);
 528                 } catch (ProcessEngineException e) {
 529                         // Most likely cause is that the execution no longer exists.
 530                         logger.debug("Error retrieving execution " + executionId
 531                                 + " variable " + variableName + ": " + e);
 532                         return null;
 533                 }
 534         }
 535         /**
 536          * Gets a variable value from specified historical process instance.
 537          * @return the variable value, or null if the variable could not be
 538          * obtained
 539          */
 540         private Object getVariableFromHistory(HistoryService historyService,
 541                         String processInstanceId, String variableName) {
 542                 try {
 543                         HistoricVariableInstance v = historyService.createHistoricVariableInstanceQuery()
 544                                 .processInstanceId(processInstanceId).variableName(variableName).singleResult();
 545                         return v == null ? null : v.getValue();
 546                 } catch (Exception e) {
 547                         logger.debug("Error retrieving process {} variable {} from history: ", processInstanceId,
 548                                 variableName, e);
 549                         return null;
 550                 }
 551         }
 552
 553         @POST
 554         @Path("/services/{processKey}/{processInstanceId}")
 555         @Produces("application/json")
 556         @Consumes("application/json")
 557         @ApiOperation(
 558                 value = "Allows for retrieval of the variables for a given process",
 559                 notes = ""
 560             )
 561         public WorkflowResponse getProcessVariables(@PathParam("processKey") String processKey, @PathParam("processInstanceId") String processInstanceId) {
 562                 //TODO filter only set of variables
 563                 WorkflowResponse response = new WorkflowResponse();
 564
 565                 long startTime = System.currentTimeMillis();
 566                 try {
 567                         ProcessEngineServices engine = getProcessEngineServices();
 568                         List<HistoricVariableInstance> variables = engine.getHistoryService().createHistoricVariableInstanceQuery().processInstanceId(processInstanceId).list();
 569                         Map<String,String> variablesMap = new HashMap<>();
 570                         for (HistoricVariableInstance variableInstance: variables) {
 571                                 variablesMap.put(variableInstance.getName(), variableInstance.getValue().toString());
 572                         }
 573
 574                         logger.debug(LOGMARKER + "***Received MSO getProcessVariables with processKey:" + processKey + " and variables: " +
 575                                 variablesMap.toString());
 576
 577                         response.setVariables(variablesMap);
 578                         response.setMessage("Success");
 579                         response.setResponse("Successfully retrieved the variables");
 580                         response.setProcessInstanceID(processInstanceId);
 581
 582                         logger.debug(LOGMARKER + response.getMessage() + " for processKey: " + processKey + " with response: " + response
 583                                 .getResponse());
 584                 } catch (Exception ex) {
 585                         response.setMessage("Fail");
 586                         response.setResponse("Failed to retrieve the variables," + ex.getMessage());
 587                         response.setProcessInstanceID(processInstanceId);
 588
 589                         logger.error("{} {} {} {} {}", MessageEnum.BPMN_GENERAL_EXCEPTION_ARG.toString(), "BPMN", MDC.get(processKey),
 590                                 ErrorCode.UnknownError.getValue(),
 591                                 LOGMARKER + response.getMessage() + " for processKey: " + processKey + " with response: " + response
 592                                         .getResponse());
 593                         logger.debug("Exception :",ex);
 594                 }
 595                 return response;
 596         }
 597 }