sli/provider-base/src/main/java/org/onap/ccsdk/sli/core/sli/provider/base/SvcLogicServiceImplBase.java

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * ONAP : CCSDK
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights
   6  *                                              reserved.
   7  * ================================================================================
   8  *  Modifications Copyright (C) 2018 IBM.
   9  * ================================================================================
  10  * Licensed under the Apache License, Version 2.0 (the "License");
  11  * you may not use this file except in compliance with the License.
  12  * You may obtain a copy of the License at
  13  *
  14  *      http://www.apache.org/licenses/LICENSE-2.0
  15  *
  16  * Unless required by applicable law or agreed to in writing, software
  17  * distributed under the License is distributed on an "AS IS" BASIS,
  18  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  19  * See the License for the specific language governing permissions and
  20  * limitations under the License.
  21  * ============LICENSE_END=========================================================
  22  */
  23
  24 package org.onap.ccsdk.sli.core.sli.provider.base;
  25
  26 import java.util.HashMap;
  27 import java.util.Map;
  28 import java.util.Properties;
  29
  30 import org.onap.ccsdk.sli.core.sli.ExitNodeException;
  31 import org.onap.ccsdk.sli.core.sli.MetricLogger;
  32 import org.onap.ccsdk.sli.core.sli.SvcLogicContext;
  33 import org.onap.ccsdk.sli.core.sli.SvcLogicException;
  34 import org.onap.ccsdk.sli.core.sli.SvcLogicGraph;
  35 import org.onap.ccsdk.sli.core.sli.SvcLogicNode;
  36 import org.onap.ccsdk.sli.core.sli.SvcLogicStore;
  37 import org.slf4j.Logger;
  38 import org.slf4j.LoggerFactory;
  39 import org.slf4j.MDC;
  40
  41 public class SvcLogicServiceImplBase implements SvcLogicServiceBase {
  42         protected SvcLogicResolver resolver;
  43     protected static final Map<String, AbstractSvcLogicNodeExecutor> BUILTIN_NODES = new HashMap<String, AbstractSvcLogicNodeExecutor>() {
  44         {
  45             put("block", new BlockNodeExecutor());
  46             put("call", new CallNodeExecutor());
  47             put("configure", new ConfigureNodeExecutor());
  48             put("delete", new DeleteNodeExecutor());
  49             put("execute", new ExecuteNodeExecutor());
  50             put("exists", new ExistsNodeExecutor());
  51             put("for", new ForNodeExecutor());
  52             put("get-resource", new GetResourceNodeExecutor());
  53             put("is-available", new IsAvailableNodeExecutor());
  54             put("notify", new NotifyNodeExecutor());
  55             put("record", new RecordNodeExecutor());
  56             put("release", new ReleaseNodeExecutor());
  57             put("reserve", new ReserveNodeExecutor());
  58             put("return", new ReturnNodeExecutor());
  59             put("save", new SaveNodeExecutor());
  60             put("set", new SetNodeExecutor());
  61             put("switch", new SwitchNodeExecutor());
  62             put("update", new UpdateNodeExecutor());
  63             put("break", new BreakNodeExecutor());
  64             put("while", new WhileNodeExecutor());
  65             put("exit", new ExitNodeExecutor());
  66         }
  67     };
  68
  69     private static final Logger LOG = LoggerFactory.getLogger(SvcLogicServiceImplBase.class);
  70     protected HashMap<String, AbstractSvcLogicNodeExecutor> nodeExecutors = null;
  71     protected Properties properties;
  72     protected SvcLogicStore store;
  73     protected static final String CURRENT_GRAPH="currentGraph";
  74
  75     public SvcLogicServiceImplBase(SvcLogicStore store) {
  76         this.store = store;
  77     }
  78
  79     protected void registerExecutors() {
  80         for (String nodeType : BUILTIN_NODES.keySet()) {
  81             registerExecutor(nodeType, BUILTIN_NODES.get(nodeType));
  82         }
  83     }
  84
  85     public void registerExecutor(String nodeName, AbstractSvcLogicNodeExecutor executor) {
  86         if (nodeExecutors == null) {
  87             nodeExecutors = new HashMap<>();
  88         }
  89         executor.setResolver(resolver);
  90         nodeExecutors.put(nodeName, executor);
  91     }
  92
  93     public void unregisterExecutor(String nodeName) {
  94         nodeExecutors.remove(nodeName);
  95     }
  96
  97     public SvcLogicContext execute(SvcLogicGraph graph, SvcLogicContext ctx) throws SvcLogicException {
  98         if (nodeExecutors == null) {
  99             registerExecutors();
 100         }
 101
 102         MDC.put(CURRENT_GRAPH, graph.toString());
 103
 104         SvcLogicNode curNode = graph.getRootNode();
 105         LOG.info("About to execute graph {}", graph.toString());
 106                 try {
 107                         while (curNode != null) {
 108                                 SvcLogicNode nextNode = executeNode(curNode, ctx);
 109                                 curNode = nextNode;
 110                         }
 111                 } catch (ExitNodeException e) {
 112             LOG.debug("SvcLogicServiceImpl caught ExitNodeException");
 113                 }
 114         MDC.remove("nodeId");
 115         MDC.remove(CURRENT_GRAPH);
 116
 117         return (ctx);
 118     }
 119
 120         public SvcLogicNode executeNode(SvcLogicNode node, SvcLogicContext ctx) throws SvcLogicException {
 121         if (node == null) {
 122             return (null);
 123         }
 124
 125                 LOG.info("About to execute node # {} ({})", node.getNodeId(), node.getNodeType());
 126
 127         if (LOG.isDebugEnabled()) {
 128             LOG.debug("Executing node " + node.getNodeId() + " of " + node.getGraph().getRpc());
 129         }
 130
 131         AbstractSvcLogicNodeExecutor executor = nodeExecutors.get(node.getNodeType());
 132
 133         if (executor != null) {
 134                 MDC.put("nodeId", node.getNodeId() + " (" + node.getNodeType() + ")");
 135             return (executor.execute(this, node, ctx));
 136         } else {
 137             throw new SvcLogicException("Attempted to execute a node of type " + node.getNodeType() + ", but no executor was registered for this type");
 138         }
 139     }
 140
 141     @Override
 142     public boolean hasGraph(String module, String rpc, String version, String mode) throws SvcLogicException {
 143         return (store.hasGraph(module, rpc, version, mode));
 144     }
 145
 146     @Override
 147         public Properties execute(String module, String rpc, String version, String mode, Properties props)
 148                         throws SvcLogicException {
 149                 LOG.info("Fetching service logic from data store");
 150                 SvcLogicGraph graph = store.fetch(module, rpc, version, mode);
 151
 152                 if (graph == null) {
 153                         Properties retProps = new Properties();
 154                         retProps.setProperty("error-code", "401");
 155                         retProps.setProperty("error-message",
 156                                         "No service logic found for [" + module + "," + rpc + "," + version + "," + mode + "]");
 157                         return (retProps);
 158                 }
 159
 160                 SvcLogicContext ctx = new SvcLogicContext(props);
 161                 ctx.setAttribute(CURRENT_GRAPH, graph.toString());
 162                 ctx.setAttribute("X-ECOMP-RequestID", MDC.get("X-ECOMP-RequestID"));
 163                 execute(graph, ctx);
 164                 return (ctx.toProperties());
 165         }
 166
 167         @Override
 168         public SvcLogicStore getStore() throws SvcLogicException {
 169                 return this.store;
 170         }
 171
 172 }