sli/provider/src/main/java/org/onap/ccsdk/sli/core/sli/provider/ExecuteNodeExecutor.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP : CCSDK
   4  * ================================================================================
   5  * Copyright (C) 2017 ONAP
   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.onap.ccsdk.sli.core.sli.provider;
  22
  23 import java.lang.reflect.InvocationTargetException;
  24 import java.lang.reflect.Method;
  25 import java.util.HashMap;
  26 import java.util.Iterator;
  27 import java.util.Map;
  28 import java.util.Set;
  29
  30 import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
  31 import org.onap.ccsdk.sli.core.sli.SvcLogicException;
  32 import org.onap.ccsdk.sli.core.sli.SvcLogicExpression;
  33 import org.onap.ccsdk.sli.core.sli.SvcLogicJavaPlugin;
  34 import org.onap.ccsdk.sli.core.sli.SvcLogicNode;
  35 import org.slf4j.Logger;
  36 import org.slf4j.LoggerFactory;
  37
  38 public class ExecuteNodeExecutor extends SvcLogicNodeExecutor {
  39         private static final Logger LOG = LoggerFactory
  40                         .getLogger(ExecuteNodeExecutor.class);
  41
  42         private static final String pluginErrorMessage = "Could not execute plugin. SvcLogic status will be set to failure.";
  43         public SvcLogicNode execute(SvcLogicServiceImpl svc, SvcLogicNode node,
  44                         SvcLogicContext ctx) throws SvcLogicException {
  45
  46                 String pluginName = SvcLogicExpressionResolver.evaluate(
  47                                 node.getAttribute("plugin"), node, ctx);
  48                 String outValue = "failure";
  49
  50                 if (LOG.isDebugEnabled()) {
  51                         LOG.debug("execute node encountered - looking for plugin "
  52                                         + pluginName);
  53                 }
  54
  55         SvcLogicJavaPlugin plugin  = getSvcLogicJavaPlugin(pluginName);
  56
  57                 if (plugin == null) {
  58                         outValue = "not-found";
  59                 } else {
  60
  61                         String methodName = evaluate(node.getAttribute("method"),  node, ctx);
  62
  63                         Class pluginClass = plugin.getClass();
  64
  65                         Method pluginMethod = null;
  66
  67                         try {
  68                                 pluginMethod = pluginClass.getMethod(methodName, Map.class, SvcLogicContext.class);
  69                         } catch (NoSuchMethodException e) {
  70                                 LOG.error(pluginErrorMessage, e);
  71                         }
  72
  73                         if (pluginMethod == null) {
  74                                 outValue = "unsupported-method";
  75                         } else {
  76                                 try {
  77
  78                                         Map<String, String> parmMap = new HashMap<String, String>();
  79
  80                                         Set<Map.Entry<String, SvcLogicExpression>> parmSet = node
  81                                                         .getParameterSet();
  82
  83                                         for (Iterator<Map.Entry<String, SvcLogicExpression>> iter = parmSet
  84                                                         .iterator(); iter.hasNext();) {
  85                                                 Map.Entry<String, SvcLogicExpression> curEnt = iter.next();
  86                                                 String curName = curEnt.getKey();
  87                                                 SvcLogicExpression curExpr = curEnt.getValue();
  88                                                 String curExprValue = SvcLogicExpressionResolver.evaluate(curExpr, node, ctx);
  89
  90                                                 LOG.debug("Parameter "+curName+" = "+curExpr.asParsedExpr()+" resolves to "+curExprValue);
  91
  92                                                 parmMap.put(curName,curExprValue);
  93                                         }
  94
  95                                         Object o = pluginMethod.invoke(plugin, parmMap, ctx);
  96                                 String emitsOutcome = SvcLogicExpressionResolver.evaluate(node.getAttribute("emitsOutcome"),  node, ctx);
  97
  98                                         outValue = mapOutcome(o, emitsOutcome);
  99
 100                                 } catch (InvocationTargetException e) {
 101                                     if(e.getCause() != null){
 102                             LOG.error(pluginErrorMessage, e.getCause());
 103                                     }else{
 104                                         LOG.error(pluginErrorMessage, e);
 105                                     }
 106                                         outValue = "failure";
 107                                         ctx.setStatus("failure");
 108                                 } catch (IllegalAccessException e) {
 109                     LOG.error(pluginErrorMessage, e);
 110                     outValue = "failure";
 111                     ctx.setStatus("failure");
 112                 } catch (IllegalArgumentException e) {
 113                     LOG.error(pluginErrorMessage, e);
 114                     outValue = "failure";
 115                     ctx.setStatus("failure");
 116                 }
 117                         }
 118
 119                 }
 120
 121                 SvcLogicNode nextNode = node.getOutcomeValue(outValue);
 122                 if (nextNode != null) {
 123                         if (LOG.isDebugEnabled()) {
 124                                 LOG.debug("about to execute " + outValue + " branch");
 125                         }
 126                         return (nextNode);
 127                 }
 128
 129                 nextNode = node.getOutcomeValue("Other");
 130                 if (nextNode != null) {
 131                         if (LOG.isDebugEnabled()) {
 132                                 LOG.debug("about to execute Other branch");
 133                         }
 134                 } else {
 135                         if (LOG.isDebugEnabled()) {
 136                                 LOG.debug("no " + outValue + " or Other branch found");
 137                         }
 138                 }
 139                 return (nextNode);
 140         }
 141
 142         protected String evaluate(SvcLogicExpression expr, SvcLogicNode node, SvcLogicContext ctx) throws SvcLogicException {
 143         return SvcLogicExpressionResolver.evaluate(node.getAttribute("method"), node, ctx);
 144     }
 145
 146     public String mapOutcome(Object o, String emitsOutcome) {
 147         if (emitsOutcome != null) {
 148             Boolean nodeEmitsOutcome = Boolean.valueOf(emitsOutcome);
 149             if (nodeEmitsOutcome) {
 150                 return (String) o;
 151             } else {
 152                 return "success";
 153             }
 154
 155         } else {
 156             return "success";
 157         }
 158     }
 159
 160 }