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.SvcLogicAdaptor;
  32 import org.openecomp.sdnc.sli.SvcLogicContext;
  33 import org.openecomp.sdnc.sli.SvcLogicException;
  34 import org.openecomp.sdnc.sli.SvcLogicExpression;
  35 import org.openecomp.sdnc.sli.SvcLogicJavaPlugin;
  36 import org.openecomp.sdnc.sli.SvcLogicNode;
  37 import org.openecomp.sdnc.sli.SvcLogicResource;
  38 import org.osgi.framework.BundleContext;
  39 import org.osgi.framework.FrameworkUtil;
  40 import org.osgi.framework.ServiceReference;
  41 import org.slf4j.Logger;
  42 import org.slf4j.LoggerFactory;
  43
  44 public class ExecuteNodeExecutor extends SvcLogicNodeExecutor {
  45         private static final Logger LOG = LoggerFactory
  46                         .getLogger(ExecuteNodeExecutor.class);
  47
  48         private static final String pluginErrorMessage = "Could not execute plugin. SvcLogic status will be set to failure.";
  49         public SvcLogicNode execute(SvcLogicServiceImpl svc, SvcLogicNode node,
  50                         SvcLogicContext ctx) throws SvcLogicException {
  51
  52                 String pluginName = SvcLogicExpressionResolver.evaluate(
  53                                 node.getAttribute("plugin"), node, ctx);
  54                 String outValue = "failure";
  55
  56                 if (LOG.isDebugEnabled()) {
  57                         LOG.debug("execute node encountered - looking for plugin "
  58                                         + pluginName);
  59                 }
  60
  61         SvcLogicJavaPlugin plugin  = getSvcLogicJavaPlugin(pluginName);
  62
  63                 if (plugin == null) {
  64                         outValue = "not-found";
  65                 } else {
  66
  67                         String methodName = evaluate(node.getAttribute("method"),  node, ctx);
  68
  69                         Class pluginClass = plugin.getClass();
  70
  71                         Method pluginMethod = null;
  72
  73                         try {
  74                                 pluginMethod = pluginClass.getMethod(methodName, Map.class, SvcLogicContext.class);
  75                         } catch (NoSuchMethodException e) {
  76                                 LOG.error(pluginErrorMessage, e);
  77                         }
  78
  79                         if (pluginMethod == null) {
  80                                 outValue = "unsupported-method";
  81                         } else {
  82                                 try {
  83
  84                                         Map<String, String> parmMap = new HashMap<String, String>();
  85
  86                                         Set<Map.Entry<String, SvcLogicExpression>> parmSet = node
  87                                                         .getParameterSet();
  88
  89                                         for (Iterator<Map.Entry<String, SvcLogicExpression>> iter = parmSet
  90                                                         .iterator(); iter.hasNext();) {
  91                                                 Map.Entry<String, SvcLogicExpression> curEnt = iter.next();
  92                                                 String curName = curEnt.getKey();
  93                                                 SvcLogicExpression curExpr = curEnt.getValue();
  94                                                 String curExprValue = SvcLogicExpressionResolver.evaluate(curExpr, node, ctx);
  95
  96                                                 LOG.debug("Parameter "+curName+" = "+curExpr.asParsedExpr()+" resolves to "+curExprValue);
  97
  98                                                 parmMap.put(curName,curExprValue);
  99                                         }
 100
 101                                         Object o = pluginMethod.invoke(plugin, parmMap, ctx);
 102                                 String emitsOutcome = SvcLogicExpressionResolver.evaluate(node.getAttribute("emitsOutcome"),  node, ctx);
 103
 104                                         outValue = mapOutcome(o, emitsOutcome);
 105
 106                                 } catch (InvocationTargetException e) {
 107                                     if(e.getCause() != null){
 108                             LOG.error(pluginErrorMessage, e.getCause());
 109                                     }else{
 110                                         LOG.error(pluginErrorMessage, e);
 111                                     }
 112                                         outValue = "failure";
 113                                         ctx.setStatus("failure");
 114                                 } catch (IllegalAccessException e) {
 115                     LOG.error(pluginErrorMessage, e);
 116                     outValue = "failure";
 117                     ctx.setStatus("failure");
 118                 } catch (IllegalArgumentException e) {
 119                     LOG.error(pluginErrorMessage, e);
 120                     outValue = "failure";
 121                     ctx.setStatus("failure");
 122                 }
 123                         }
 124
 125                 }
 126
 127                 SvcLogicNode nextNode = node.getOutcomeValue(outValue);
 128                 if (nextNode != null) {
 129                         if (LOG.isDebugEnabled()) {
 130                                 LOG.debug("about to execute " + outValue + " branch");
 131                         }
 132                         return (nextNode);
 133                 }
 134
 135                 nextNode = node.getOutcomeValue("Other");
 136                 if (nextNode != null) {
 137                         if (LOG.isDebugEnabled()) {
 138                                 LOG.debug("about to execute Other branch");
 139                         }
 140                 } else {
 141                         if (LOG.isDebugEnabled()) {
 142                                 LOG.debug("no " + outValue + " or Other branch found");
 143                         }
 144                 }
 145                 return (nextNode);
 146         }
 147
 148         protected SvcLogicJavaPlugin getSvcLogicJavaPlugin(String pluginName){
 149                BundleContext bctx = FrameworkUtil.getBundle(this.getClass())
 150                         .getBundleContext();
 151
 152                 ServiceReference sref = bctx.getServiceReference(pluginName);
 153
 154                 if (sref == null) {
 155                     LOG.warn("Could not find service reference object for plugin " + pluginName);
 156                     return null;
 157                 } else {
 158                     SvcLogicJavaPlugin plugin  = (SvcLogicJavaPlugin) bctx
 159                             .getService(sref);
 160                     return plugin;
 161                 }
 162         }
 163         protected String evaluate(SvcLogicExpression expr, SvcLogicNode node, SvcLogicContext ctx) throws SvcLogicException {
 164         return SvcLogicExpressionResolver.evaluate(node.getAttribute("method"), node, ctx);
 165     }
 166
 167     public String mapOutcome(Object o, String emitsOutcome) {
 168         if (emitsOutcome != null) {
 169             Boolean nodeEmitsOutcome = Boolean.valueOf(emitsOutcome);
 170             if (nodeEmitsOutcome) {
 171                 return (String) o;
 172             } else {
 173                 return "success";
 174             }
 175
 176         } else {
 177             return "success";
 178         }
 179     }
 180
 181 }