git.opendaylight Code Review - controller.git/blob

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.netconf.impl.osgi;
   9
  10 import com.google.common.base.Preconditions;
  11 import com.google.common.collect.Maps;
  12 import com.google.common.collect.Sets;
  13 import org.opendaylight.controller.netconf.api.NetconfDocumentedException;
  14 import org.opendaylight.controller.netconf.impl.DefaultCommitNotificationProducer;
  15 import org.opendaylight.controller.netconf.impl.NetconfServerSession;
  16 import org.opendaylight.controller.netconf.impl.mapping.CapabilityProvider;
  17 import org.opendaylight.controller.netconf.impl.mapping.operations.DefaultCloseSession;
  18 import org.opendaylight.controller.netconf.impl.mapping.operations.DefaultCommit;
  19 import org.opendaylight.controller.netconf.impl.mapping.operations.DefaultGetSchema;
  20 import org.opendaylight.controller.netconf.impl.mapping.operations.DefaultStartExi;
  21 import org.opendaylight.controller.netconf.impl.mapping.operations.DefaultStopExi;
  22 import org.opendaylight.controller.netconf.impl.mapping.operations.DefaultNetconfOperation;
  23 import org.opendaylight.controller.netconf.mapping.api.HandlingPriority;
  24 import org.opendaylight.controller.netconf.mapping.api.NetconfOperation;
  25 import org.opendaylight.controller.netconf.mapping.api.NetconfOperationChainedExecution;
  26 import org.opendaylight.controller.netconf.mapping.api.NetconfOperationService;
  27 import org.opendaylight.controller.netconf.mapping.api.NetconfOperationServiceSnapshot;
  28 import org.opendaylight.controller.netconf.util.xml.XmlUtil;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31 import org.w3c.dom.Document;
  32
  33 import java.util.Collections;
  34 import java.util.HashSet;
  35 import java.util.Map;
  36 import java.util.Set;
  37 import java.util.TreeMap;
  38
  39 public class NetconfOperationRouterImpl implements NetconfOperationRouter {
  40
  41     private static final Logger logger = LoggerFactory.getLogger(NetconfOperationRouterImpl.class);
  42
  43     private final NetconfOperationServiceSnapshot netconfOperationServiceSnapshot;
  44     private Set<NetconfOperation> allNetconfOperations;
  45
  46     private NetconfOperationRouterImpl(NetconfOperationServiceSnapshot netconfOperationServiceSnapshot) {
  47         this.netconfOperationServiceSnapshot = netconfOperationServiceSnapshot;
  48     }
  49
  50     private void initNetconfOperations(Set<NetconfOperation> allOperations) {
  51         allNetconfOperations = allOperations;
  52     }
  53
  54     /**
  55      * Factory method to produce instance of NetconfOperationRouter
  56      */
  57     public static NetconfOperationRouter createOperationRouter(NetconfOperationServiceSnapshot netconfOperationServiceSnapshot,
  58                                                                CapabilityProvider capabilityProvider, DefaultCommitNotificationProducer commitNotifier) {
  59         NetconfOperationRouterImpl router = new NetconfOperationRouterImpl(netconfOperationServiceSnapshot);
  60
  61         Preconditions.checkNotNull(netconfOperationServiceSnapshot);
  62         Preconditions.checkNotNull(capabilityProvider);
  63
  64         final String sessionId = netconfOperationServiceSnapshot.getNetconfSessionIdForReporting();
  65
  66         final Set<NetconfOperation> defaultNetconfOperations = Sets.newHashSet();
  67         defaultNetconfOperations.add(new DefaultGetSchema(capabilityProvider, sessionId));
  68         defaultNetconfOperations.add(new DefaultCloseSession(sessionId, router));
  69         defaultNetconfOperations.add(new DefaultStartExi(sessionId));
  70         defaultNetconfOperations.add(new DefaultStopExi(sessionId));
  71         defaultNetconfOperations.add(new DefaultCommit(commitNotifier, capabilityProvider, sessionId, router));
  72
  73         router.initNetconfOperations(getAllNetconfOperations(defaultNetconfOperations, netconfOperationServiceSnapshot));
  74
  75         return router;
  76     }
  77
  78     private static Set<NetconfOperation> getAllNetconfOperations(Set<NetconfOperation> defaultNetconfOperations,
  79             NetconfOperationServiceSnapshot netconfOperationServiceSnapshot) {
  80         Set<NetconfOperation> result = new HashSet<>();
  81         result.addAll(defaultNetconfOperations);
  82
  83         for (NetconfOperationService netconfOperationService : netconfOperationServiceSnapshot.getServices()) {
  84             final Set<NetconfOperation> netOpsFromService = netconfOperationService.getNetconfOperations();
  85             for (NetconfOperation netconfOperation : netOpsFromService) {
  86                 Preconditions.checkState(result.contains(netconfOperation) == false,
  87                         "Netconf operation %s already present", netconfOperation);
  88                 result.add(netconfOperation);
  89             }
  90         }
  91         return Collections.unmodifiableSet(result);
  92     }
  93
  94     @Override
  95     public synchronized Document onNetconfMessage(Document message,
  96             NetconfServerSession session) throws NetconfDocumentedException {
  97         Preconditions.checkNotNull(allNetconfOperations, "Operation router was not initialized properly");
  98
  99         NetconfOperationExecution netconfOperationExecution;
 100         String messageAsString = XmlUtil.toString(message);
 101
 102         try {
 103             netconfOperationExecution = getNetconfOperationWithHighestPriority(message, session);
 104         } catch (IllegalArgumentException | IllegalStateException e) {
 105             logger.warn("Unable to handle rpc {} on session {}", messageAsString, session, e);
 106
 107             String errorMessage = String.format("Unable to handle rpc %s on session %s", messageAsString, session);
 108             Map<String, String> errorInfo = Maps.newHashMap();
 109
 110             NetconfDocumentedException.ErrorTag tag;
 111             if (e instanceof IllegalArgumentException) {
 112                 errorInfo.put(NetconfDocumentedException.ErrorTag.operation_not_supported.toString(), e.getMessage());
 113                 tag = NetconfDocumentedException.ErrorTag.operation_not_supported;
 114             } else {
 115                 errorInfo.put(NetconfDocumentedException.ErrorTag.operation_failed.toString(), e.getMessage());
 116                 tag = NetconfDocumentedException.ErrorTag.operation_failed;
 117             }
 118
 119             throw new NetconfDocumentedException(errorMessage, e, NetconfDocumentedException.ErrorType.application,
 120                     tag, NetconfDocumentedException.ErrorSeverity.error, errorInfo);
 121         } catch (RuntimeException e) {
 122             throw handleUnexpectedEx("Unexpected exception during netconf operation sort", e);
 123         }
 124
 125         try {
 126             return executeOperationWithHighestPriority(message, netconfOperationExecution, messageAsString);
 127         } catch (RuntimeException e) {
 128             throw handleUnexpectedEx("Unexpected exception during netconf operation execution", e);
 129         }
 130     }
 131
 132     @Override
 133     public void close() throws Exception {
 134         netconfOperationServiceSnapshot.close();
 135     }
 136
 137     private NetconfDocumentedException handleUnexpectedEx(String s, Exception e) throws NetconfDocumentedException {
 138         logger.error(s, e);
 139
 140         Map<String, String> info = Maps.newHashMap();
 141         info.put(NetconfDocumentedException.ErrorSeverity.error.toString(), e.toString());
 142         return new NetconfDocumentedException("Unexpected error",
 143                 NetconfDocumentedException.ErrorType.application,
 144                 NetconfDocumentedException.ErrorTag.operation_failed,
 145                 NetconfDocumentedException.ErrorSeverity.error, info);
 146     }
 147
 148     private Document executeOperationWithHighestPriority(Document message,
 149             NetconfOperationExecution netconfOperationExecution, String messageAsString)
 150             throws NetconfDocumentedException {
 151         logger.debug("Forwarding netconf message {} to {}", messageAsString, netconfOperationExecution.netconfOperation);
 152         return netconfOperationExecution.execute(message);
 153     }
 154
 155     private NetconfOperationExecution getNetconfOperationWithHighestPriority(
 156             Document message, NetconfServerSession session) throws NetconfDocumentedException {
 157
 158         TreeMap<HandlingPriority, NetconfOperation> sortedByPriority = getSortedNetconfOperationsWithCanHandle(
 159                 message, session);
 160
 161         Preconditions.checkArgument(sortedByPriority.isEmpty() == false,
 162                 "No %s available to handle message %s", NetconfOperation.class.getName(),
 163                 XmlUtil.toString(message));
 164
 165         return NetconfOperationExecution.createExecutionChain(sortedByPriority, sortedByPriority.lastKey());
 166     }
 167
 168     private TreeMap<HandlingPriority, NetconfOperation> getSortedNetconfOperationsWithCanHandle(Document message,
 169             NetconfServerSession session) throws NetconfDocumentedException {
 170         TreeMap<HandlingPriority, NetconfOperation> sortedPriority = Maps.newTreeMap();
 171
 172         for (NetconfOperation netconfOperation : allNetconfOperations) {
 173             final HandlingPriority handlingPriority = netconfOperation.canHandle(message);
 174             if (netconfOperation instanceof DefaultNetconfOperation) {
 175                 ((DefaultNetconfOperation) netconfOperation).setNetconfSession(session);
 176             }
 177             if (handlingPriority.equals(HandlingPriority.CANNOT_HANDLE) == false) {
 178
 179                 Preconditions.checkState(sortedPriority.containsKey(handlingPriority) == false,
 180                         "Multiple %s available to handle message %s with priority %s",
 181                         NetconfOperation.class.getName(), message, handlingPriority);
 182                 sortedPriority.put(handlingPriority, netconfOperation);
 183             }
 184         }
 185         return sortedPriority;
 186     }
 187
 188     public static final NetconfOperationChainedExecution EXECUTION_TERMINATION_POINT = new NetconfOperationChainedExecution() {
 189         @Override
 190         public boolean isExecutionTermination() {
 191             return true;
 192         }
 193
 194         @Override
 195         public Document execute(Document requestMessage) throws NetconfDocumentedException {
 196             throw new NetconfDocumentedException("This execution represents the termination point in operation execution and cannot be executed itself",
 197                     NetconfDocumentedException.ErrorType.application,
 198                     NetconfDocumentedException.ErrorTag.operation_failed,
 199                     NetconfDocumentedException.ErrorSeverity.error);
 200         }
 201     };
 202
 203     private static class NetconfOperationExecution implements NetconfOperationChainedExecution {
 204         private final NetconfOperation netconfOperation;
 205         private NetconfOperationChainedExecution subsequentExecution;
 206
 207         private NetconfOperationExecution(NetconfOperation netconfOperation, NetconfOperationChainedExecution subsequentExecution) {
 208             this.netconfOperation = netconfOperation;
 209             this.subsequentExecution = subsequentExecution;
 210         }
 211
 212         @Override
 213         public boolean isExecutionTermination() {
 214             return false;
 215         }
 216
 217         @Override
 218         public Document execute(Document message) throws NetconfDocumentedException {
 219             return netconfOperation.handle(message, subsequentExecution);
 220         }
 221
 222         public static NetconfOperationExecution createExecutionChain(
 223                 TreeMap<HandlingPriority, NetconfOperation> sortedByPriority, HandlingPriority handlingPriority) {
 224             NetconfOperation netconfOperation = sortedByPriority.get(handlingPriority);
 225             HandlingPriority subsequentHandlingPriority = sortedByPriority.lowerKey(handlingPriority);
 226
 227             NetconfOperationChainedExecution subsequentExecution = null;
 228
 229             if (subsequentHandlingPriority != null) {
 230                 subsequentExecution = createExecutionChain(sortedByPriority, subsequentHandlingPriority);
 231             } else {
 232                 subsequentExecution = EXECUTION_TERMINATION_POINT;
 233             }
 234
 235             return new NetconfOperationExecution(netconfOperation, subsequentExecution);
 236         }
 237     }
 238
 239     @Override
 240     public String toString() {
 241         return "NetconfOperationRouterImpl{" + "netconfOperationServiceSnapshot=" + netconfOperationServiceSnapshot
 242                 + '}';
 243     }
 244 }