sli/provider/src/main/java/org/openecomp/sdnc/sli/provider/ExistsNodeExecutor.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 org.openecomp.sdnc.sli.SvcLogicContext;
  25 import org.openecomp.sdnc.sli.SvcLogicException;
  26 import org.openecomp.sdnc.sli.SvcLogicNode;
  27 import org.openecomp.sdnc.sli.SvcLogicResource;
  28 import org.osgi.framework.BundleContext;
  29 import org.osgi.framework.FrameworkUtil;
  30 import org.osgi.framework.ServiceReference;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33
  34 public class ExistsNodeExecutor extends SvcLogicNodeExecutor {
  35
  36         private static final Logger LOG = LoggerFactory
  37                         .getLogger(ExistsNodeExecutor.class);
  38         @Override
  39         public SvcLogicNode execute(SvcLogicServiceImpl svc, SvcLogicNode node,
  40                         SvcLogicContext ctx) throws SvcLogicException {
  41
  42                 String plugin = SvcLogicExpressionResolver.evaluate(
  43                                 node.getAttribute("plugin"), node, ctx);
  44                 String resourceType = SvcLogicExpressionResolver.evaluate(
  45                                 node.getAttribute("resource"), node, ctx);
  46                 String key = SvcLogicExpressionResolver.evaluateAsKey(
  47                                 node.getAttribute("key"), node, ctx);
  48                 String pfx = SvcLogicExpressionResolver.evaluate(
  49                                 node.getAttribute("pfx"), node, ctx);
  50
  51                 String outValue = "failure";
  52
  53                 if (LOG.isDebugEnabled()) {
  54                         LOG.debug("exists node encountered - looking for resource class "
  55                                         + plugin);
  56                 }
  57
  58
  59
  60                         SvcLogicResource resourcePlugin = getSvcLogicResource(plugin);
  61
  62                         if (resourcePlugin != null) {
  63
  64                                 try {
  65
  66                                         switch (resourcePlugin.exists(resourceType, key, pfx, ctx)) {
  67                                         case SUCCESS:
  68                                                 outValue = "true";
  69                                                 break;
  70                                         case NOT_FOUND:
  71                                                 outValue = "false";
  72                                                 break;
  73                                         case FAILURE:
  74                                         default:
  75                                                 outValue = "false";
  76                                         }
  77                                 } catch (SvcLogicException e) {
  78                                         LOG.error("Caught exception from resource plugin", e);
  79                                         outValue = "failure";
  80                                 }
  81                         } else {
  82                                 LOG.warn("Could not find SvcLogicResource object for plugin "
  83                                                 + plugin);
  84                         }
  85
  86                 SvcLogicNode nextNode = node.getOutcomeValue(outValue);
  87                 if (nextNode != null) {
  88                         if (LOG.isDebugEnabled()) {
  89                                 LOG.debug("about to execute " + outValue + " branch");
  90                         }
  91                         return (nextNode);
  92                 }
  93
  94                 nextNode = node.getOutcomeValue("Other");
  95                 if (nextNode != null) {
  96                         if (LOG.isDebugEnabled()) {
  97                                 LOG.debug("about to execute Other branch");
  98                         }
  99                 } else {
 100                         if (LOG.isDebugEnabled()) {
 101
 102                                 LOG.debug("no "+outValue+" or Other branch found");
 103                         }
 104                 }
 105                 return (nextNode);
 106         }
 107
 108     protected SvcLogicResource getSvcLogicResource(String plugin) {
 109         BundleContext bctx = FrameworkUtil.getBundle(this.getClass())
 110                 .getBundleContext();
 111
 112         ServiceReference sref = bctx.getServiceReference(plugin);
 113         if (sref != null) {
 114             SvcLogicResource resourcePlugin = (SvcLogicResource) bctx
 115                     .getService(sref);
 116             return resourcePlugin;
 117         }
 118         else {
 119             LOG.warn("Could not find service reference object for plugin " + plugin);
 120             return null;
 121         }
 122     }
 123
 124
 125 }