sli/provider/src/main/java/org/onap/ccsdk/sli/core/sli/provider/ExistsNodeExecutor.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP : CCSDK
   4  * ================================================================================
   5  * Copyright (C) 2017 ONAP
   6  * ================================================================================
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ============LICENSE_END=========================================================
  19  */
  20
  21 package org.onap.ccsdk.sli.core.sli.provider;
  22
  23 import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
  24 import org.onap.ccsdk.sli.core.sli.SvcLogicException;
  25 import org.onap.ccsdk.sli.core.sli.SvcLogicNode;
  26 import org.onap.ccsdk.sli.core.sli.SvcLogicResource;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 public class ExistsNodeExecutor extends SvcLogicNodeExecutor {
  31
  32         private static final Logger LOG = LoggerFactory
  33                         .getLogger(ExistsNodeExecutor.class);
  34         @Override
  35         public SvcLogicNode execute(SvcLogicServiceImpl svc, SvcLogicNode node,
  36                         SvcLogicContext ctx) throws SvcLogicException {
  37
  38                 String plugin = SvcLogicExpressionResolver.evaluate(
  39                                 node.getAttribute("plugin"), node, ctx);
  40                 String resourceType = SvcLogicExpressionResolver.evaluate(
  41                                 node.getAttribute("resource"), node, ctx);
  42                 String key = SvcLogicExpressionResolver.evaluateAsKey(
  43                                 node.getAttribute("key"), node, ctx);
  44                 String pfx = SvcLogicExpressionResolver.evaluate(
  45                                 node.getAttribute("pfx"), node, ctx);
  46
  47                 String outValue = "failure";
  48
  49                 if (LOG.isDebugEnabled()) {
  50                         LOG.debug("exists node encountered - looking for resource class "
  51                                         + plugin);
  52                 }
  53
  54
  55
  56                         SvcLogicResource resourcePlugin = getSvcLogicResource(plugin);
  57
  58                         if (resourcePlugin != null) {
  59
  60                                 try {
  61
  62                                         switch (resourcePlugin.exists(resourceType, key, pfx, ctx)) {
  63                                         case SUCCESS:
  64                                                 outValue = "true";
  65                                                 break;
  66                                         case NOT_FOUND:
  67                                                 outValue = "false";
  68                                                 break;
  69                                         case FAILURE:
  70                                         default:
  71                                                 outValue = "false";
  72                                         }
  73                                 } catch (SvcLogicException e) {
  74                                         LOG.error("Caught exception from resource plugin", e);
  75                                         outValue = "failure";
  76                                 }
  77                         } else {
  78                                 LOG.warn("Could not find SvcLogicResource object for plugin "
  79                                                 + plugin);
  80                         }
  81
  82                 SvcLogicNode nextNode = node.getOutcomeValue(outValue);
  83                 if (nextNode != null) {
  84                         if (LOG.isDebugEnabled()) {
  85                                 LOG.debug("about to execute " + outValue + " branch");
  86                         }
  87                         return (nextNode);
  88                 }
  89
  90                 nextNode = node.getOutcomeValue("Other");
  91                 if (nextNode != null) {
  92                         if (LOG.isDebugEnabled()) {
  93                                 LOG.debug("about to execute Other branch");
  94                         }
  95                 } else {
  96                         if (LOG.isDebugEnabled()) {
  97
  98                                 LOG.debug("no "+outValue+" or Other branch found");
  99                         }
 100                 }
 101                 return (nextNode);
 102         }
 103
 104 }