2 * ============LICENSE_START=======================================================
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4 * ================================================================================
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5 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
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6 * ================================================================================
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7 * Licensed under the Apache License, Version 2.0 (the "License");
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8 * you may not use this file except in compliance with the License.
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9 * You may obtain a copy of the License at
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11 * http://www.apache.org/licenses/LICENSE-2.0
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13 * Unless required by applicable law or agreed to in writing, software
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14 * distributed under the License is distributed on an "AS IS" BASIS,
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15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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16 * See the License for the specific language governing permissions and
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17 * limitations under the License.
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18 * ============LICENSE_END=========================================================
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21 package org.openecomp.mso.bpmn.common.workflow.service;
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23 import java.util.HashMap;
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24 import java.util.List;
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25 import java.util.Map;
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26 import java.util.UUID;
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27 import java.util.concurrent.atomic.AtomicLong;
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29 import javax.ws.rs.Consumes;
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30 import javax.ws.rs.POST;
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31 import javax.ws.rs.Path;
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32 import javax.ws.rs.PathParam;
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33 import javax.ws.rs.Produces;
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34 import javax.ws.rs.core.Context;
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35 import javax.ws.rs.core.Response;
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36 import javax.ws.rs.core.UriInfo;
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38 import org.camunda.bpm.engine.HistoryService;
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39 import org.camunda.bpm.engine.ProcessEngineException;
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40 import org.camunda.bpm.engine.ProcessEngineServices;
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41 import org.camunda.bpm.engine.ProcessEngines;
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42 import org.camunda.bpm.engine.RuntimeService;
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43 import org.camunda.bpm.engine.history.HistoricVariableInstance;
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44 import org.camunda.bpm.engine.runtime.ProcessInstance;
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45 import org.camunda.bpm.engine.variable.VariableMap;
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46 import org.camunda.bpm.engine.variable.Variables;
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47 import org.camunda.bpm.engine.variable.Variables.SerializationDataFormats;
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48 import org.camunda.bpm.engine.variable.impl.VariableMapImpl;
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49 import org.openecomp.mso.bpmn.core.WorkflowException;
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50 import org.openecomp.mso.logger.MessageEnum;
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51 import org.openecomp.mso.logger.MsoLogger;
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52 import org.slf4j.MDC;
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55 public class WorkflowResource {
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57 private ProcessEngineServices pes4junit = null;
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59 private static final MsoLogger msoLogger = MsoLogger.getMsoLogger(MsoLogger.Catalog.BPEL);
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60 private static final String LOGMARKER = "[WRKFLOW-RESOURCE]";
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62 private static final int DEFAULT_WAIT_TIME = 30000;
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65 private UriInfo uriInfo = null;
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68 * Starts the process instance and responds to client synchronously
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69 * If the request does not contain mso-service-request-timeout then it waits for the value specified in DEFAULT_WAIT_TIME
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70 * Note: value specified in mso-service-request-timeout is in seconds
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71 * During polling time, if there is an exception encountered in the process execution then polling is stopped and the error response is
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72 * returned to the client
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74 * @param variableMap
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78 @Path("/services/{processKey}")
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79 @Produces("application/json")
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80 @Consumes("application/json")
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81 public Response startProcessInstanceByKey(@PathParam("processKey") String processKey,
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82 VariableMapImpl variableMap) {
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84 Map<String, Object> inputVariables = getInputVariables(variableMap);
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85 setLogContext(processKey, inputVariables);
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87 WorkflowResponse workflowResponse = new WorkflowResponse();
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88 long startTime = System.currentTimeMillis();
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89 ProcessInstance processInstance = null;
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92 //Kickoff the process
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93 ProcessThread thread = new ProcessThread(inputVariables,processKey,msoLogger);
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96 Map<String, Object> responseMap = null;
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98 //wait for process to be completed
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99 long waitTime = getWaitTime(inputVariables);
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100 long now = System.currentTimeMillis();
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102 long endTime = start + waitTime;
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103 long pollingInterval = 500;
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105 // TEMPORARY LOGIC FOR UNIT TEST REFACTORING
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106 // If this is a unit test (method is invoked directly), wait a max
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107 // of 5 seconds after process ended for a result. In production,
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108 // wait up to 60 seconds.
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109 long timeToWaitAfterProcessEnded = uriInfo == null ? 5000 : 60000;
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110 AtomicLong timeProcessEnded = new AtomicLong(0);
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111 boolean endedWithNoResponse = false;
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113 while (now <= endTime) {
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114 Thread.sleep(pollingInterval);
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116 now = System.currentTimeMillis();
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118 // Increase the polling interval over time
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120 long elapsed = now - start;
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122 if (elapsed > 60000) {
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123 pollingInterval = 5000;
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124 } else if (elapsed > 10000) {
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125 pollingInterval = 1000;
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127 Exception exception = thread.getException();
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128 if (exception != null) {
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129 throw new Exception(exception);
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132 processInstance = thread.getProcessInstance();
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134 if (processInstance == null) {
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135 msoLogger.debug(LOGMARKER + processKey + " process has not been created yet");
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139 String processInstanceId = processInstance.getId();
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140 workflowResponse.setProcessInstanceID(processInstanceId);
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142 responseMap = getResponseMap(processInstance, processKey, timeProcessEnded);
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144 if (responseMap == null) {
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145 msoLogger.debug(LOGMARKER + processKey + " has not produced a response yet");
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147 if (timeProcessEnded.longValue() != 0) {
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148 long elapsedSinceEnded = System.currentTimeMillis() - timeProcessEnded.longValue();
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150 if (elapsedSinceEnded > timeToWaitAfterProcessEnded) {
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151 endedWithNoResponse = true;
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156 processResponseMap(workflowResponse, responseMap);
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157 recordEvents(processKey, workflowResponse, startTime);
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158 return Response.status(workflowResponse.getMessageCode()).entity(workflowResponse).build();
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162 //if we dont get response after waiting then send timeout response
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165 String processInstanceId;
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167 if (processInstance == null) {
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168 processInstanceId = "N/A";
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169 state = "NOT STARTED";
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171 processInstanceId = processInstance.getProcessInstanceId();
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172 state = isProcessEnded(processInstanceId) ? "ENDED" : "NOT ENDED";
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175 workflowResponse.setMessage("Fail");
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176 if (endedWithNoResponse) {
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177 workflowResponse.setResponse("Process ended without producing a response");
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179 workflowResponse.setResponse("Request timed out, process state: " + state);
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181 workflowResponse.setProcessInstanceID(processInstanceId);
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182 recordEvents(processKey, workflowResponse, startTime);
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183 workflowResponse.setMessageCode(500);
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184 return Response.status(500).entity(workflowResponse).build();
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185 } catch (Exception ex) {
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186 msoLogger.debug(LOGMARKER + "Exception in startProcessInstance by key");
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187 ex.printStackTrace();
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188 workflowResponse.setMessage("Fail" );
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189 workflowResponse.setResponse("Error occurred while executing the process: " + ex.getMessage());
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190 if (processInstance != null) workflowResponse.setProcessInstanceID(processInstance.getId());
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192 msoLogger.error(MessageEnum.BPMN_GENERAL_EXCEPTION_ARG, "BPMN", MDC.get(processKey),
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193 MsoLogger.ErrorCode.UnknownError, LOGMARKER + workflowResponse.getMessage()
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194 + " for processKey: " + processKey + " with response: " + workflowResponse.getResponse());
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196 workflowResponse.setMessageCode(500);
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197 recordEvents(processKey, workflowResponse, startTime);
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198 return Response.status(500).entity(workflowResponse).build();
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203 * Returns the wait time, this is used by the resource on how long it should wait to send a response
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204 * If none specified DEFAULT_WAIT_TIME is used
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205 * @param inputVariables
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208 private int getWaitTime(Map<String, Object> inputVariables)
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210 String timeout = inputVariables.get("mso-service-request-timeout") == null
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211 ? null : inputVariables.get("mso-service-request-timeout").toString();
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213 if (timeout != null) {
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215 return Integer.parseInt(timeout)*1000;
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216 } catch (NumberFormatException nex) {
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217 msoLogger.debug("Invalid input for mso-service-request-timeout");
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220 return DEFAULT_WAIT_TIME;
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223 private void recordEvents(String processKey, WorkflowResponse response, long startTime) {
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225 msoLogger.recordMetricEvent ( startTime, MsoLogger.StatusCode.COMPLETE, MsoLogger.ResponseCode.Suc,
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226 LOGMARKER + response.getMessage() + " for processKey: "
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227 + processKey + " with response: " + response.getResponse(), "BPMN", MDC.get(processKey), null);
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229 msoLogger.recordAuditEvent (startTime, MsoLogger.StatusCode.COMPLETE, MsoLogger.ResponseCode.Suc,
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230 LOGMARKER + response.getMessage() + " for processKey: "
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231 + processKey + " with response: " + response.getResponse());
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234 private void setLogContext(String processKey, Map<String, Object> inputVariables) {
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235 MsoLogger.setServiceName("MSO." + processKey);
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236 if (inputVariables != null) {
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237 MsoLogger.setLogContext(getValueFromInputVariables(inputVariables, "mso-request-id"),
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238 getValueFromInputVariables(inputVariables, "mso-service-instance-id"));
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242 private String getValueFromInputVariables(Map<String,Object> inputVariables, String key) {
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243 Object value = inputVariables.get(key);
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244 if (value == null) {
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247 return value.toString();
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252 * Checks to see if the specified process is ended.
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253 * @param processInstanceId the process instance ID
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254 * @return true if the process is ended
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256 private boolean isProcessEnded(String processInstanceId) {
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257 ProcessEngineServices pes = getProcessEngineServices();
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259 return pes.getRuntimeService().createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult() == null ? true : false ;
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260 } catch (Exception e) {
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265 private void processResponseMap(WorkflowResponse workflowResponse, Map<String, Object> responseMap) {
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266 Object object = responseMap.get("Response");
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267 String response = object == null ? null : String.valueOf(object);
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268 if(response == null){
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269 object = responseMap.get("WorkflowResponse");
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270 response = object == null ? null : String.valueOf(object);
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273 workflowResponse.setResponse(response);
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275 object = responseMap.get("ResponseCode");
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276 String responseCode = object == null ? null : String.valueOf(object);
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279 workflowResponse.setMessageCode(Integer.parseInt(responseCode));
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280 } catch(NumberFormatException nex) {
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281 msoLogger.debug(LOGMARKER + "Failed to parse ResponseCode: " + responseCode);
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282 workflowResponse.setMessageCode(-1);
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285 Object status = responseMap.get("Status");
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287 if ("Success".equalsIgnoreCase(String.valueOf(status))) {
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288 workflowResponse.setMessage("Success");
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289 } else if ("Fail".equalsIgnoreCase(String.valueOf(status))) {
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290 workflowResponse.setMessage("Fail");
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292 msoLogger.debug(LOGMARKER + "Unrecognized Status: " + responseCode);
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293 workflowResponse.setMessage("Fail");
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299 * Triggers the workflow in a separate thread
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301 private class ProcessThread extends Thread {
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302 private final Map<String,Object> inputVariables;
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303 private final String processKey;
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304 private final MsoLogger msoLogger;
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305 private final String businessKey;
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306 private ProcessInstance processInstance = null;
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307 private Exception exception = null;
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309 public ProcessThread(Map<String, Object> inputVariables, String processKey, MsoLogger msoLogger) {
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310 this.inputVariables = inputVariables;
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311 this.processKey = processKey;
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312 this.msoLogger = msoLogger;
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313 this.businessKey = UUID.randomUUID().toString();
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317 * If an exception occurs when starting the process instance, it may
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318 * be obtained by calling this method. Note that exceptions are only
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319 * recorded while the process is executing in its original thread.
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320 * Once a process is suspended, exception recording stops.
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321 * @return the exception, or null if none has occurred
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323 public Exception getException() {
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328 public ProcessInstance getProcessInstance() {
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329 return this.processInstance;
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333 * Sets the process instance exception.
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334 * @param exception the exception
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336 private void setException(Exception exception) {
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337 this.exception = exception;
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340 public void run() {
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341 setLogContext(processKey, inputVariables);
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343 long startTime = System.currentTimeMillis();
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346 msoLogger.debug(LOGMARKER + "***Received MSO startProcessInstanceByKey with processKey:"
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347 + processKey + " and variables: " + inputVariables);
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349 msoLogger.recordAuditEvent (startTime, MsoLogger.StatusCode.COMPLETE, MsoLogger.ResponseCode.Suc, LOGMARKER
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350 + "Call to MSO workflow/services in Camunda. Received MSO startProcessInstanceByKey with"
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351 + " processKey:" + processKey
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352 + " businessKey:" + businessKey
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353 + " variables: " + inputVariables);
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355 RuntimeService runtimeService = getProcessEngineServices().getRuntimeService();
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357 // Note that this method doesn't return until the process suspends
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358 // itself or finishes. We provide a business key so we can identify
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359 // the process instance immediately.
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360 processInstance = runtimeService.startProcessInstanceByKey(
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361 processKey, inputVariables);
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363 } catch (Exception e) {
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364 msoLogger.debug(LOGMARKER + "ProcessThread caught an exception executing "
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365 + processKey + ": " + e);
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372 private Map<String, Object> getInputVariables(VariableMapImpl variableMap) {
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373 VariableMap inputVariables = Variables.createVariables();
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374 @SuppressWarnings("unchecked")
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375 Map<String, Object> vMap = (Map<String, Object>) variableMap.get("variables");
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376 for (String key : vMap.keySet()) { //variabe name vn
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377 @SuppressWarnings("unchecked")
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378 Map<String, Object> valueMap = (Map<String,Object>)vMap.get(key); //value, type
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379 inputVariables.putValueTyped(key, Variables
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380 .objectValue(valueMap.get("value"))
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381 .serializationDataFormat(SerializationDataFormats.JAVA) // tells the engine to use java serialization for persisting the value
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384 return inputVariables;
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388 * Attempts to get a response map from the specified process instance.
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389 * @return the response map, or null if it is unavailable
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391 private Map<String, Object> getResponseMap(ProcessInstance processInstance,
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392 String processKey, AtomicLong timeProcessEnded) {
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394 String responseMapVariable = processKey + "ResponseMap";
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395 String processInstanceId = processInstance.getId();
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397 // Query the runtime service to see if a response map is ready.
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399 /* RuntimeService runtimeService = getProcessEngineServices().getRuntimeService();
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400 List<Execution> executions = runtimeService.createExecutionQuery()
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401 .processInstanceId(processInstanceId).list();
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403 for (Execution execution : executions) {
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404 @SuppressWarnings("unchecked")
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405 Map<String, Object> responseMap = (Map<String, Object>)
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406 getVariableFromExecution(runtimeService, execution.getId(),
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407 responseMapVariable);
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409 if (responseMap != null) {
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410 msoLogger.debug(LOGMARKER + "Obtained " + responseMapVariable
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411 + " from process " + processInstanceId + " execution "
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412 + execution.getId());
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413 return responseMap;
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417 //Querying history seem to return consistent results compared to querying the runtime service
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419 boolean alreadyEnded = timeProcessEnded.longValue() != 0;
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421 if (alreadyEnded || isProcessEnded(processInstance.getId())) {
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422 if (!alreadyEnded) {
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423 timeProcessEnded.set(System.currentTimeMillis());
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426 // Query the history service to see if a response map exists.
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428 HistoryService historyService = getProcessEngineServices().getHistoryService();
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429 @SuppressWarnings("unchecked")
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430 Map<String, Object> responseMap = (Map<String, Object>)
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431 getVariableFromHistory(historyService, processInstance.getId(),
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432 responseMapVariable);
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434 if (responseMap != null) {
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435 msoLogger.debug(LOGMARKER + "Obtained " + responseMapVariable
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436 + " from process " + processInstanceId + " history");
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437 return responseMap;
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440 // Query the history service for old-style response variables.
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442 String prefix = (String) getVariableFromHistory(historyService, processInstanceId, "prefix");
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444 if (prefix != null) {
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446 // Check for 'WorkflowResponse' variable
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447 Object workflowResponseObject = getVariableFromHistory(historyService, processInstanceId, "WorkflowResponse");
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448 String workflowResponse = workflowResponseObject == null ? null : String.valueOf(workflowResponseObject);
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449 msoLogger.debug(LOGMARKER + "WorkflowResponse: " + workflowResponse);
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451 if (workflowResponse != null) {
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452 Object responseCodeObject = getVariableFromHistory(historyService, processInstanceId, prefix + "ResponseCode");
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453 String responseCode = responseCodeObject == null ? null : String.valueOf(responseCodeObject);
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454 msoLogger.debug(LOGMARKER + prefix + "ResponseCode: " + responseCode);
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455 responseMap = new HashMap<String, Object>();
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456 responseMap.put("WorkflowResponse", workflowResponse);
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457 responseMap.put("ResponseCode", responseCode);
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458 responseMap.put("Status", "Success");
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459 return responseMap;
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463 // Check for 'WorkflowException' variable
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464 WorkflowException workflowException = null;
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465 String workflowExceptionText = null;
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467 Object workflowExceptionObject = getVariableFromHistory(historyService, processInstanceId, "WorkflowException");
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468 if(workflowExceptionObject != null) {
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469 if(workflowExceptionObject instanceof WorkflowException) {
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470 workflowException = (WorkflowException) workflowExceptionObject;
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471 workflowExceptionText = workflowException.toString();
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472 responseMap = new HashMap<String, Object>();
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473 responseMap.put("WorkflowException", workflowExceptionText);
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474 responseMap.put("ResponseCode", workflowException.getErrorCode());
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475 responseMap.put("Status", "Fail");
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476 return responseMap;
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478 else if (workflowExceptionObject instanceof String) {
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479 Object object = getVariableFromHistory(historyService, processInstanceId, prefix + "ResponseCode");
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480 String responseCode = object == null ? null : String.valueOf(object);
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481 workflowExceptionText = (String) workflowExceptionObject;
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482 responseMap = new HashMap<String, Object>();
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483 responseMap.put("WorkflowException", workflowExceptionText);
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484 responseMap.put("ResponseCode", responseCode);
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485 responseMap.put("Status", "Fail");
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486 return responseMap;
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490 msoLogger.debug(LOGMARKER + "WorkflowException: " + workflowExceptionText);
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492 // BEGIN LEGACY SUPPORT. TODO: REMOVE THIS CODE
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493 Object object = getVariableFromHistory(historyService, processInstanceId, processKey + "Response");
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494 String response = object == null ? null : String.valueOf(object);
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495 msoLogger.debug(LOGMARKER + processKey + "Response: " + response);
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497 if (response != null) {
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498 object = getVariableFromHistory(historyService, processInstanceId, prefix + "ResponseCode");
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499 String responseCode = object == null ? null : String.valueOf(object);
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500 msoLogger.debug(LOGMARKER + prefix + "ResponseCode: " + responseCode);
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501 responseMap = new HashMap<String, Object>();
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502 responseMap.put("Response", response);
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503 responseMap.put("ResponseCode", responseCode);
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504 responseMap.put("Status", "Success");
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505 return responseMap;
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508 object = getVariableFromHistory(historyService, processInstanceId, prefix + "ErrorResponse");
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509 String errorResponse = object == null ? null : String.valueOf(object);
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510 msoLogger.debug(LOGMARKER + prefix + "ErrorResponse: " + errorResponse);
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512 if (errorResponse != null) {
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513 object = getVariableFromHistory(historyService, processInstanceId, prefix + "ResponseCode");
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514 String responseCode = object == null ? null : String.valueOf(object);
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515 msoLogger.debug(LOGMARKER + prefix + "ResponseCode: " + responseCode);
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516 responseMap = new HashMap<String, Object>();
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517 responseMap.put("Response", errorResponse);
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518 responseMap.put("ResponseCode", responseCode);
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519 responseMap.put("Status", "Fail");
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520 return responseMap;
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522 // END LEGACY SUPPORT. TODO: REMOVE THIS CODE
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529 * Gets a variable value from the specified execution.
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530 * @return the variable value, or null if the variable could not be
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533 private Object getVariableFromExecution(RuntimeService runtimeService,
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534 String executionId, String variableName) {
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536 return runtimeService.getVariable(executionId, variableName);
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537 } catch (ProcessEngineException e) {
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538 // Most likely cause is that the execution no longer exists.
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539 msoLogger.debug("Error retrieving execution " + executionId
\r
540 + " variable " + variableName + ": " + e);
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545 * Gets a variable value from specified historical process instance.
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546 * @return the variable value, or null if the variable could not be
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549 private Object getVariableFromHistory(HistoryService historyService,
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550 String processInstanceId, String variableName) {
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552 HistoricVariableInstance v = historyService.createHistoricVariableInstanceQuery()
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553 .processInstanceId(processInstanceId).variableName(variableName).singleResult();
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554 return v == null ? null : v.getValue();
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555 } catch (Exception e) {
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556 msoLogger.debug("Error retrieving process " + processInstanceId
\r
557 + " variable " + variableName + " from history: " + e);
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563 @Path("/services/{processKey}/{processInstanceId}")
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564 @Produces("application/json")
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565 @Consumes("application/json")
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566 public WorkflowResponse getProcessVariables(@PathParam("processKey") String processKey, @PathParam("processInstanceId") String processInstanceId) {
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567 //TODO filter only set of variables
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568 WorkflowResponse response = new WorkflowResponse();
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570 long startTime = System.currentTimeMillis();
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572 ProcessEngineServices engine = getProcessEngineServices();
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573 List<HistoricVariableInstance> variables = engine.getHistoryService().createHistoricVariableInstanceQuery().processInstanceId(processInstanceId).list();
\r
574 Map<String,String> variablesMap = new HashMap<String,String>();
\r
575 for (HistoricVariableInstance variableInstance: variables) {
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576 variablesMap.put(variableInstance.getName(), variableInstance.getValue().toString());
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579 msoLogger.debug(LOGMARKER + "***Received MSO getProcessVariables with processKey:" + processKey + " and variables: " + variablesMap.toString());
\r
581 msoLogger.recordAuditEvent (startTime, MsoLogger.StatusCode.COMPLETE, MsoLogger.ResponseCode.Suc, LOGMARKER
\r
582 + "Call to MSO workflow/services in Camunda. Received MSO getProcessVariables with processKey:"
\r
583 + processKey + " and variables: "
\r
584 + variablesMap.toString());
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587 response.setVariables(variablesMap);
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588 response.setMessage("Success");
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589 response.setResponse("Successfully retrieved the variables");
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590 response.setProcessInstanceID(processInstanceId);
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592 msoLogger.debug(LOGMARKER + response.getMessage() + " for processKey: " + processKey + " with response: " + response.getResponse());
\r
593 } catch (Exception ex) {
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594 response.setMessage("Fail");
\r
595 response.setResponse("Failed to retrieve the variables," + ex.getMessage());
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596 response.setProcessInstanceID(processInstanceId);
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598 msoLogger.error (MessageEnum.BPMN_GENERAL_EXCEPTION_ARG, "BPMN", MDC.get(processKey), MsoLogger.ErrorCode.UnknownError, LOGMARKER
\r
599 + response.getMessage()
\r
600 + " for processKey: "
\r
602 + " with response: "
\r
603 + response.getResponse());
\r
607 msoLogger.recordMetricEvent ( startTime, MsoLogger.StatusCode.COMPLETE, MsoLogger.ResponseCode.Suc,
\r
608 LOGMARKER + response.getMessage() + " for processKey: "
\r
609 + processKey + " with response: " + response.getResponse(), "BPMN", MDC.get(processKey), null);
\r
611 msoLogger.recordAuditEvent (startTime, MsoLogger.StatusCode.COMPLETE, MsoLogger.ResponseCode.Suc,
\r
612 LOGMARKER + response.getMessage() + " for processKey: "
\r
613 + processKey + " with response: " + response.getResponse());
\r
618 private ProcessEngineServices getProcessEngineServices() {
\r
619 if (pes4junit == null) {
\r
620 return ProcessEngines.getDefaultProcessEngine();
\r
626 public void setProcessEngineServices4junit(ProcessEngineServices pes) {
\r