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