sli/provider/src/main/java/org/openecomp/sdnc/sli/provider/ExecuteNodeExecutor.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * openECOMP : SDN-C
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights
   6  *                                              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.sdnc.sli.provider;
  23
  24 import java.lang.reflect.InvocationTargetException;
  25 import java.lang.reflect.Method;
  26 import java.util.HashMap;
  27 import java.util.Iterator;
  28 import java.util.Map;
  29 import java.util.Set;
  30
  31 import org.openecomp.sdnc.sli.SvcLogicContext;
  32 import org.openecomp.sdnc.sli.SvcLogicException;
  33 import org.openecomp.sdnc.sli.SvcLogicExpression;
  34 import org.openecomp.sdnc.sli.SvcLogicJavaPlugin;
  35 import org.openecomp.sdnc.sli.SvcLogicNode;
  36 import org.slf4j.Logger;
  37 import org.slf4j.LoggerFactory;
  38
  39 public class ExecuteNodeExecutor extends SvcLogicNodeExecutor {
  40         private static final Logger LOG = LoggerFactory
  41                         .getLogger(ExecuteNodeExecutor.class);
  42
  43         private static final String pluginErrorMessage = "Could not execute plugin. SvcLogic status will be set to failure.";
  44         public SvcLogicNode execute(SvcLogicServiceImpl svc, SvcLogicNode node,
  45                         SvcLogicContext ctx) throws SvcLogicException {
  46
  47                 String pluginName = SvcLogicExpressionResolver.evaluate(
  48                                 node.getAttribute("plugin"), node, ctx);
  49                 String outValue = "failure";
  50
  51                 if (LOG.isDebugEnabled()) {
  52                         LOG.debug("execute node encountered - looking for plugin "
  53                                         + pluginName);
  54                 }
  55
  56         SvcLogicJavaPlugin plugin  = getSvcLogicJavaPlugin(pluginName);
  57
  58                 if (plugin == null) {
  59                         outValue = "not-found";
  60                 } else {
  61
  62                         String methodName = evaluate(node.getAttribute("method"),  node, ctx);
  63
  64                         Class pluginClass = plugin.getClass();
  65
  66                         Method pluginMethod = null;
  67
  68                         try {
  69                                 pluginMethod = pluginClass.getMethod(methodName, Map.class, SvcLogicContext.class);
  70                         } catch (NoSuchMethodException e) {
  71                                 LOG.error(pluginErrorMessage, e);
  72                         }
  73
  74                         if (pluginMethod == null) {
  75                                 outValue = "unsupported-method";
  76                         } else {
  77                                 try {
  78
  79                                         Map<String, String> parmMap = new HashMap<String, String>();
  80
  81                                         Set<Map.Entry<String, SvcLogicExpression>> parmSet = node
  82                                                         .getParameterSet();
  83
  84                                         for (Iterator<Map.Entry<String, SvcLogicExpression>> iter = parmSet
  85                                                         .iterator(); iter.hasNext();) {
  86                                                 Map.Entry<String, SvcLogicExpression> curEnt = iter.next();
  87                                                 String curName = curEnt.getKey();
  88                                                 SvcLogicExpression curExpr = curEnt.getValue();
  89                                                 String curExprValue = SvcLogicExpressionResolver.evaluate(curExpr, node, ctx);
  90
  91                                                 LOG.debug("Parameter "+curName+" = "+curExpr.asParsedExpr()+" resolves to "+curExprValue);
  92
  93                                                 parmMap.put(curName,curExprValue);
  94                                         }
  95
  96                                         Object o = pluginMethod.invoke(plugin, parmMap, ctx);
  97                                 String emitsOutcome = SvcLogicExpressionResolver.evaluate(node.getAttribute("emitsOutcome"),  node, ctx);
  98
  99                                         outValue = mapOutcome(o, emitsOutcome);
 100
 101                                 } catch (InvocationTargetException e) {
 102                                     if(e.getCause() != null){
 103                             LOG.error(pluginErrorMessage, e.getCause());
 104                                     }else{
 105                                         LOG.error(pluginErrorMessage, e);
 106                                     }
 107                                         outValue = "failure";
 108                                         ctx.setStatus("failure");
 109                                 } catch (IllegalAccessException e) {
 110                     LOG.error(pluginErrorMessage, e);
 111                     outValue = "failure";
 112                     ctx.setStatus("failure");
 113                 } catch (IllegalArgumentException e) {
 114                     LOG.error(pluginErrorMessage, e);
 115                     outValue = "failure";
 116                     ctx.setStatus("failure");
 117                 }
 118                         }
 119
 120                 }
 121
 122                 SvcLogicNode nextNode = node.getOutcomeValue(outValue);
 123                 if (nextNode != null) {
 124                         if (LOG.isDebugEnabled()) {
 125                                 LOG.debug("about to execute " + outValue + " branch");
 126                         }
 127                         return (nextNode);
 128                 }
 129
 130                 nextNode = node.getOutcomeValue("Other");
 131                 if (nextNode != null) {
 132                         if (LOG.isDebugEnabled()) {
 133                                 LOG.debug("about to execute Other branch");
 134                         }
 135                 } else {
 136                         if (LOG.isDebugEnabled()) {
 137                                 LOG.debug("no " + outValue + " or Other branch found");
 138                         }
 139                 }
 140                 return (nextNode);
 141         }
 142
 143         protected String evaluate(SvcLogicExpression expr, SvcLogicNode node, SvcLogicContext ctx) throws SvcLogicException {
 144         return SvcLogicExpressionResolver.evaluate(node.getAttribute("method"), node, ctx);
 145     }
 146
 147     public String mapOutcome(Object o, String emitsOutcome) {
 148         if (emitsOutcome != null) {
 149             Boolean nodeEmitsOutcome = Boolean.valueOf(emitsOutcome);
 150             if (nodeEmitsOutcome) {
 151                 return (String) o;
 152             } else {
 153                 return "success";
 154             }
 155
 156         } else {
 157             return "success";
 158         }
 159     }
 160
 161 }