sli/provider/src/main/java/org/openecomp/sdnc/sli/provider/ReserveNodeExecutor.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.SvcLogicExpression;
  27 import org.openecomp.sdnc.sli.SvcLogicNode;
  28 import org.openecomp.sdnc.sli.SvcLogicResource;
  29 import org.osgi.framework.BundleContext;
  30 import org.osgi.framework.FrameworkUtil;
  31 import org.osgi.framework.ServiceReference;
  32 import org.slf4j.Logger;
  33 import org.slf4j.LoggerFactory;
  34
  35 public class ReserveNodeExecutor extends SvcLogicNodeExecutor {
  36
  37         private static final Logger LOG = LoggerFactory
  38                         .getLogger(ReserveNodeExecutor.class);
  39
  40         @Override
  41         public SvcLogicNode execute(SvcLogicServiceImpl svc, SvcLogicNode node,
  42                         SvcLogicContext ctx) throws SvcLogicException {
  43
  44                 String plugin = SvcLogicExpressionResolver.evaluate(
  45                                 node.getAttribute("plugin"), node, ctx);
  46                 String resourceType = SvcLogicExpressionResolver.evaluate(
  47                                 node.getAttribute("resource"), node, ctx);
  48                 String key = SvcLogicExpressionResolver.evaluateAsKey(
  49                                 node.getAttribute("key"), node, ctx);
  50                 String pfx = SvcLogicExpressionResolver.evaluate(node.getAttribute("pfx"),node,ctx);
  51
  52
  53         SvcLogicExpression selectExpr = node.getAttribute("select");
  54         String select = null;
  55
  56         if (selectExpr != null)
  57         {
  58                 select = SvcLogicExpressionResolver.evaluateAsKey(selectExpr, node, ctx);
  59         }
  60
  61                 String outValue = "failure";
  62
  63                 if (LOG.isDebugEnabled()) {
  64                         LOG.debug("reserve node encountered - looking for resource class "
  65                                         + plugin);
  66                 }
  67
  68
  69
  70         SvcLogicResource resourcePlugin = getSvcLogicResource(plugin);
  71
  72                         if (resourcePlugin != null) {
  73
  74                                 try {
  75                                         switch (resourcePlugin.reserve(resourceType, select, key, pfx, ctx)) {
  76                                         case SUCCESS:
  77                                                 outValue = "success";
  78                                                 break;
  79                                         case NOT_FOUND:
  80                                                 outValue = "not-found";
  81                                                 break;
  82                                         case FAILURE:
  83                                         default:
  84                                                 outValue = "failure";
  85                                         }
  86                                 } catch (SvcLogicException e) {
  87                                         LOG.error("Caught exception from resource plugin", e);
  88                                         outValue = "failure";
  89                                 }
  90                         } else {
  91                                 LOG.warn("Could not find SvcLogicResource object for plugin "
  92                                                 + plugin);
  93                         }
  94
  95                 SvcLogicNode nextNode = node.getOutcomeValue(outValue);
  96                 if (nextNode != null) {
  97                         if (LOG.isDebugEnabled()) {
  98                                 LOG.debug("about to execute " + outValue + " branch");
  99                         }
 100                         return (nextNode);
 101                 }
 102
 103                 nextNode = node.getOutcomeValue("Other");
 104                 if (nextNode != null) {
 105                         if (LOG.isDebugEnabled()) {
 106                                 LOG.debug("about to execute Other branch");
 107                         }
 108                 } else {
 109                         if (LOG.isDebugEnabled()) {
 110
 111                                 LOG.debug("no "+outValue+" or Other branch found");
 112                         }
 113                 }
 114                 return (nextNode);
 115         }
 116
 117     protected SvcLogicResource getSvcLogicResource(String plugin) {
 118         BundleContext bctx = FrameworkUtil.getBundle(this.getClass())
 119                 .getBundleContext();
 120
 121         ServiceReference sref = bctx.getServiceReference(plugin);
 122         if (sref != null) {
 123             SvcLogicResource resourcePlugin = (SvcLogicResource) bctx
 124                     .getService(sref);
 125             return resourcePlugin;
 126         }
 127         else {
 128             LOG.warn("Could not find service reference object for plugin " + plugin);
 129             return null;
 130         }
 131     }
 132
 133
 134 }