bpmn/MSOCoreBPMN/src/main/java/org/openecomp/mso/bpmn/core/ReadConfigTask.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * OPENECOMP - MSO
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20
  21 package org.openecomp.mso.bpmn.core;
  22
  23 import java.io.IOException;
  24 import java.io.InputStream;
  25 import java.util.Properties;
  26
  27 import org.camunda.bpm.engine.ProcessEngineException;
  28 import org.camunda.bpm.engine.delegate.DelegateExecution;
  29 import org.camunda.bpm.engine.delegate.Expression;
  30
  31 import org.openecomp.mso.logger.MsoLogger;
  32
  33 /**
  34  * Reads the contents of a resource file as a string and stores it in an
  35  * execution variable.
  36  * <p>
  37  * Required fields:<br/><br/>
  38  * &nbsp;&nbsp;&nbsp;&nbsp;file: the resource file path<br/>
  39  * &nbsp;&nbsp;&nbsp;&nbsp;outputVariable: the output variable name<br/>
  40  */
  41 public class ReadConfigTask extends BaseTask {
  42
  43         private static MsoLogger msoLogger = MsoLogger.getMsoLogger(MsoLogger.Catalog.BPEL);
  44         private static Properties properties = null;
  45
  46         private Expression propertiesFile;
  47
  48         public void execute(DelegateExecution execution) throws Exception {
  49                 if (msoLogger.isDebugEnabled()) {
  50                         msoLogger.debug("Started Executing " + getTaskName());
  51                 }
  52
  53                 String thePropertiesFile =
  54                         getStringField(propertiesFile, execution, "propertiesFile");
  55
  56                 if (msoLogger.isDebugEnabled()) {
  57                         msoLogger.debug("propertiesFile = " + thePropertiesFile);
  58                 }
  59
  60                 Boolean shouldFail = (Boolean) execution.getVariable("shouldFail");
  61
  62                 if (shouldFail != null && shouldFail) {
  63                         throw new ProcessEngineException(getClass().getSimpleName() + " Failed");
  64                 }
  65
  66                 synchronized (ReadConfigTask.class) {
  67                         if (properties == null) {
  68                                 properties = new Properties();
  69
  70                                 InputStream stream = null;
  71
  72                                 try {
  73                                         stream = getClass().getResourceAsStream(thePropertiesFile);
  74
  75                                         if (stream == null) {
  76                                                 throw new IOException("Resource not found: " + thePropertiesFile);
  77                                         }
  78
  79                                         properties.load(stream);
  80
  81                                         stream.close();
  82                                         stream = null;
  83
  84                                 } finally {
  85                                         if (stream != null) {
  86                                                 try {
  87                                                         stream.close();
  88                                                 } catch (Exception e) {
  89                                                         // Do nothing
  90                                                 }
  91                                         }
  92                                 }
  93                         }
  94                 }
  95
  96                 for (Object objectKey : properties.keySet()) {
  97                         String key = (String) objectKey;
  98                         String value = properties.getProperty(key);
  99
 100                         if (msoLogger.isDebugEnabled()) {
 101                                 msoLogger.debug("Setting variable '" + key + "' to '" + value + "'");
 102                         }
 103
 104                         execution.setVariable(key, value);
 105                 }
 106
 107                 if (msoLogger.isDebugEnabled()) {
 108                         msoLogger.debug("Done Executing " + getTaskName());
 109                 }
 110         }
 111 }