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.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.openecomp.sdnc.sli.SvcLogicAdaptor;
  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.openecomp.sdnc.sli.SvcLogicResource;
  37 import org.osgi.framework.BundleContext;
  38 import org.osgi.framework.FrameworkUtil;
  39 import org.osgi.framework.ServiceReference;
  40 import org.slf4j.Logger;
  41 import org.slf4j.LoggerFactory;
  42
  43 public class ExecuteNodeExecutor extends SvcLogicNodeExecutor {
  44         private static final Logger LOG = LoggerFactory
  45                         .getLogger(ExecuteNodeExecutor.class);
  46
  47         public SvcLogicNode execute(SvcLogicServiceImpl svc, SvcLogicNode node,
  48                         SvcLogicContext ctx) throws SvcLogicException {
  49
  50                 String pluginName = SvcLogicExpressionResolver.evaluate(
  51                                 node.getAttribute("plugin"), node, ctx);
  52                 String outValue = "failure";
  53
  54                 if (LOG.isDebugEnabled()) {
  55                         LOG.debug("execute node encountered - looking for plugin "
  56                                         + pluginName);
  57                 }
  58
  59                 BundleContext bctx = FrameworkUtil.getBundle(this.getClass())
  60                                 .getBundleContext();
  61
  62                 ServiceReference sref = bctx.getServiceReference(pluginName);
  63
  64                 if (sref == null) {
  65                         outValue = "not-found";
  66                 } else {
  67                         SvcLogicJavaPlugin plugin  = (SvcLogicJavaPlugin) bctx
  68                                         .getService(sref);
  69
  70                         String methodName = SvcLogicExpressionResolver.evaluate(node.getAttribute("method"),  node, ctx);
  71
  72                         Class pluginClass = plugin.getClass();
  73
  74                         Method pluginMethod = null;
  75
  76                         try {
  77                                 pluginMethod = pluginClass.getMethod(methodName, Map.class, SvcLogicContext.class);
  78                         } catch (Exception e) {
  79                                 LOG.error("Caught exception looking for method "+pluginName+"."+methodName+"(Map, SvcLogicContext)");
  80                         }
  81
  82                         if (pluginMethod == null) {
  83                                 outValue = "unsupported-method";
  84                         } else {
  85                                 try {
  86
  87                                         Map<String, String> parmMap = new HashMap<String, String>();
  88
  89                                         Set<Map.Entry<String, SvcLogicExpression>> parmSet = node
  90                                                         .getParameterSet();
  91
  92                                         for (Iterator<Map.Entry<String, SvcLogicExpression>> iter = parmSet
  93                                                         .iterator(); iter.hasNext();) {
  94                                                 Map.Entry<String, SvcLogicExpression> curEnt = iter.next();
  95                                                 String curName = curEnt.getKey();
  96                                                 SvcLogicExpression curExpr = curEnt.getValue();
  97                                                 String curExprValue = SvcLogicExpressionResolver.evaluate(curExpr, node, ctx);
  98
  99                                                 LOG.debug("Parameter "+curName+" = "+curExpr.asParsedExpr()+" resolves to "+curExprValue);
 100
 101                                                 parmMap.put(curName,curExprValue);
 102                                         }
 103
 104                                         pluginMethod.invoke(plugin, parmMap, ctx);
 105
 106                                         outValue = "success";
 107                                 } catch (Exception e) {
 108                                         LOG.error("Caught exception executing "+pluginName+"."+methodName, e);
 109
 110                                         outValue = "failure";
 111                                         ctx.setStatus("failure");
 112                                 }
 113                         }
 114
 115                 }
 116
 117                 SvcLogicNode nextNode = node.getOutcomeValue(outValue);
 118                 if (nextNode != null) {
 119                         if (LOG.isDebugEnabled()) {
 120                                 LOG.debug("about to execute " + outValue + " branch");
 121                         }
 122                         return (nextNode);
 123                 }
 124
 125                 nextNode = node.getOutcomeValue("Other");
 126                 if (nextNode != null) {
 127                         if (LOG.isDebugEnabled()) {
 128                                 LOG.debug("about to execute Other branch");
 129                         }
 130                 } else {
 131                         if (LOG.isDebugEnabled()) {
 132                                 LOG.debug("no " + outValue + " or Other branch found");
 133                         }
 134                 }
 135                 return (nextNode);
 136         }
 137
 138 }