sli/provider/src/main/java/org/onap/ccsdk/sli/core/sli/provider/GetResourceNodeExecutor.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.SvcLogicExpression;
  26 import org.onap.ccsdk.sli.core.sli.SvcLogicNode;
  27 import org.onap.ccsdk.sli.core.sli.SvcLogicResource;
  28 import org.slf4j.Logger;
  29 import org.slf4j.LoggerFactory;
  30
  31 public class GetResourceNodeExecutor extends SvcLogicNodeExecutor {
  32
  33         private static final Logger LOG = LoggerFactory
  34                         .getLogger(GetResourceNodeExecutor.class);
  35
  36         public SvcLogicNode execute(SvcLogicServiceImpl svc, SvcLogicNode node,
  37                         SvcLogicContext ctx) throws SvcLogicException {
  38
  39                 String plugin = SvcLogicExpressionResolver.evaluate(
  40                                 node.getAttribute("plugin"), node, ctx);
  41                 String resourceType = SvcLogicExpressionResolver.evaluate(
  42                                 node.getAttribute("resource"), node, ctx);
  43                 String key = SvcLogicExpressionResolver.evaluateAsKey(
  44                                 node.getAttribute("key"), node, ctx);
  45                 String pfx = SvcLogicExpressionResolver.evaluate(
  46                                 node.getAttribute("pfx"), node, ctx);
  47
  48                 String localOnlyStr = SvcLogicExpressionResolver.evaluate(
  49                                 node.getAttribute("local-only"), node, ctx);
  50
  51                 // Note: for get-resource, only refresh from A&AI if the DG explicitly set
  52                 // local-only to false.  Otherwise, just read from local database.
  53                 boolean localOnly = true;
  54
  55                 if ("false".equalsIgnoreCase(localOnlyStr)) {
  56                         localOnly = false;
  57                 }
  58
  59                 SvcLogicExpression selectExpr = node.getAttribute("select");
  60                 String select = null;
  61
  62                 if (selectExpr != null) {
  63                         select = SvcLogicExpressionResolver.evaluateAsKey(selectExpr, node,
  64                                         ctx);
  65                 }
  66
  67                 SvcLogicExpression orderByExpr = node.getAttribute("order-by");
  68                 String orderBy = null;
  69
  70                 if (orderByExpr != null) {
  71                         orderBy = SvcLogicExpressionResolver.evaluateAsKey(orderByExpr, node,
  72                                         ctx);
  73                 }
  74
  75                 String outValue = "failure";
  76
  77                 if (LOG.isDebugEnabled()) {
  78                         LOG.debug(node.getNodeType()
  79                                         + " node encountered - looking for resource class "
  80                                         + plugin);
  81                 }
  82
  83
  84                         SvcLogicResource resourcePlugin = getSvcLogicResource(plugin);
  85
  86                         if (resourcePlugin != null) {
  87
  88                                 try {
  89                                         switch (resourcePlugin.query(resourceType, localOnly, select, key,
  90                                                         pfx, orderBy, ctx)) {
  91                                         case SUCCESS:
  92                                                 outValue = "success";
  93                                                 break;
  94                                         case NOT_FOUND:
  95                                                 outValue = "not-found";
  96                                                 break;
  97                                         case FAILURE:
  98                                         default:
  99                                                 outValue = "failure";
 100                                         }
 101                                 } catch (SvcLogicException e) {
 102                                         LOG.error("Caught exception from resource plugin", e);
 103                                         outValue = "failure";
 104                                 }
 105                         } else {
 106                                 LOG.warn("Could not find SvcLogicResource object for plugin "
 107                                                 + plugin);
 108                         }
 109
 110
 111                 SvcLogicNode nextNode = node.getOutcomeValue(outValue);
 112                 if (nextNode != null) {
 113                         if (LOG.isDebugEnabled()) {
 114                                 LOG.debug("about to execute " + outValue + " branch");
 115                         }
 116                         return (nextNode);
 117                 }
 118
 119                 nextNode = node.getOutcomeValue("Other");
 120                 if (nextNode != null) {
 121                         if (LOG.isDebugEnabled()) {
 122                                 LOG.debug("about to execute Other branch");
 123                         }
 124                 } else {
 125                         if (LOG.isDebugEnabled()) {
 126
 127                                 LOG.debug("no "+outValue+" or Other branch found");
 128                         }
 129                 }
 130                 return (nextNode);
 131         }
 132
 133 }