bpmn/MSOCoreBPMN/src/main/java/org/openecomp/mso/bpmn/core/ReadConfigTask.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  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  *      http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  * ============LICENSE_END=========================================================
  20  */
  21
  22 package org.openecomp.mso.bpmn.core;
  23
  24 import java.io.IOException;
  25 import java.io.InputStream;
  26 import java.util.Properties;
  27
  28 import org.camunda.bpm.engine.ProcessEngineException;
  29 import org.camunda.bpm.engine.delegate.DelegateExecution;
  30 import org.camunda.bpm.engine.delegate.Expression;
  31
  32 import org.openecomp.mso.logger.MsoLogger;
  33
  34 /**
  35  * Reads the contents of a resource file as a string and stores it in an
  36  * execution variable.
  37  * <p>
  38  * Required fields:<br/><br/>
  39  * &nbsp;&nbsp;&nbsp;&nbsp;file: the resource file path<br/>
  40  * &nbsp;&nbsp;&nbsp;&nbsp;outputVariable: the output variable name<br/>
  41  */
  42 public class ReadConfigTask extends BaseTask {
  43
  44         private static MsoLogger msoLogger = MsoLogger.getMsoLogger(MsoLogger.Catalog.BPEL);
  45         private static Properties properties = null;
  46
  47         private Expression propertiesFile;
  48
  49         public void execute(DelegateExecution execution) throws Exception {
  50                 if (msoLogger.isDebugEnabled()) {
  51                         msoLogger.debug("Started Executing " + getTaskName());
  52                 }
  53
  54                 String thePropertiesFile =
  55                         getStringField(propertiesFile, execution, "propertiesFile");
  56
  57                 if (msoLogger.isDebugEnabled()) {
  58                         msoLogger.debug("propertiesFile = " + thePropertiesFile);
  59                 }
  60
  61                 Boolean shouldFail = (Boolean) execution.getVariable("shouldFail");
  62
  63                 if (shouldFail != null && shouldFail) {
  64                         throw new ProcessEngineException(getClass().getSimpleName() + " Failed");
  65                 }
  66
  67                 synchronized (ReadConfigTask.class) {
  68                         if (properties == null) {
  69                                 properties = new Properties();
  70
  71                                 InputStream stream = null;
  72
  73                                 try {
  74                                         stream = getClass().getResourceAsStream(thePropertiesFile);
  75
  76                                         if (stream == null) {
  77                                                 throw new IOException("Resource not found: " + thePropertiesFile);
  78                                         }
  79
  80                                         properties.load(stream);
  81
  82                                         stream.close();
  83                                         stream = null;
  84
  85                                 } finally {
  86                                         if (stream != null) {
  87                                                 try {
  88                                                         stream.close();
  89                                                 } catch (Exception e) {
  90                                                     msoLogger.debug("Exception:", e);
  91                                                 }
  92                                         }
  93                                 }
  94                         }
  95                 }
  96
  97                 for (Object objectKey : properties.keySet()) {
  98                         String key = (String) objectKey;
  99                         String value = properties.getProperty(key);
 100
 101                         if (msoLogger.isDebugEnabled()) {
 102                                 msoLogger.debug("Setting variable '" + key + "' to '" + value + "'");
 103                         }
 104
 105                         execution.setVariable(key, value);
 106                 }
 107
 108                 if (msoLogger.isDebugEnabled()) {
 109                         msoLogger.debug("Done Executing " + getTaskName());
 110                 }
 111         }
 112 }