sli/provider/src/main/java/org/openecomp/sdnc/sli/provider/GetResourceNodeExecutor.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 GetResourceNodeExecutor extends SvcLogicNodeExecutor {
  36
  37         private static final Logger LOG = LoggerFactory
  38                         .getLogger(GetResourceNodeExecutor.class);
  39
  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 localOnlyStr = SvcLogicExpressionResolver.evaluate(
  53                                 node.getAttribute("local-only"), node, ctx);
  54
  55                 // Note: for get-resource, only refresh from A&AI if the DG explicitly set
  56                 // local-only to false.  Otherwise, just read from local database.
  57                 boolean localOnly = true;
  58
  59                 if ("false".equalsIgnoreCase(localOnlyStr)) {
  60                         localOnly = false;
  61                 }
  62
  63                 SvcLogicExpression selectExpr = node.getAttribute("select");
  64                 String select = null;
  65
  66                 if (selectExpr != null) {
  67                         select = SvcLogicExpressionResolver.evaluateAsKey(selectExpr, node,
  68                                         ctx);
  69                 }
  70
  71                 SvcLogicExpression orderByExpr = node.getAttribute("order-by");
  72                 String orderBy = null;
  73
  74                 if (orderByExpr != null) {
  75                         orderBy = SvcLogicExpressionResolver.evaluateAsKey(orderByExpr, node,
  76                                         ctx);
  77                 }
  78
  79                 String outValue = "failure";
  80
  81                 if (LOG.isDebugEnabled()) {
  82                         LOG.debug(node.getNodeType()
  83                                         + " node encountered - looking for resource class "
  84                                         + plugin);
  85                 }
  86
  87
  88                         SvcLogicResource resourcePlugin = getSvcLogicResource(plugin);
  89
  90                         if (resourcePlugin != null) {
  91
  92                                 try {
  93                                         switch (resourcePlugin.query(resourceType, localOnly, select, key,
  94                                                         pfx, orderBy, ctx)) {
  95                                         case SUCCESS:
  96                                                 outValue = "success";
  97                                                 break;
  98                                         case NOT_FOUND:
  99                                                 outValue = "not-found";
 100                                                 break;
 101                                         case FAILURE:
 102                                         default:
 103                                                 outValue = "failure";
 104                                         }
 105                                 } catch (SvcLogicException e) {
 106                                         LOG.error("Caught exception from resource plugin", e);
 107                                         outValue = "failure";
 108                                 }
 109                         } else {
 110                                 LOG.warn("Could not find SvcLogicResource object for plugin "
 111                                                 + plugin);
 112                         }
 113
 114
 115                 SvcLogicNode nextNode = node.getOutcomeValue(outValue);
 116                 if (nextNode != null) {
 117                         if (LOG.isDebugEnabled()) {
 118                                 LOG.debug("about to execute " + outValue + " branch");
 119                         }
 120                         return (nextNode);
 121                 }
 122
 123                 nextNode = node.getOutcomeValue("Other");
 124                 if (nextNode != null) {
 125                         if (LOG.isDebugEnabled()) {
 126                                 LOG.debug("about to execute Other branch");
 127                         }
 128                 } else {
 129                         if (LOG.isDebugEnabled()) {
 130
 131                                 LOG.debug("no "+outValue+" or Other branch found");
 132                         }
 133                 }
 134                 return (nextNode);
 135         }
 136
 137     protected SvcLogicResource getSvcLogicResource(String plugin) {
 138         BundleContext bctx = FrameworkUtil.getBundle(this.getClass())
 139                 .getBundleContext();
 140
 141         ServiceReference sref = bctx.getServiceReference(plugin);
 142         if (sref != null) {
 143             SvcLogicResource resourcePlugin = (SvcLogicResource) bctx
 144                     .getService(sref);
 145             return resourcePlugin;
 146         }
 147         else {
 148             LOG.warn("Could not find service reference object for plugin " + plugin);
 149             return null;
 150         }
 151     }
 152
 153
 154 }