opendaylight/netconf/netconf-impl/src/main/java/org/opendaylight/controller/netconf/impl/osgi/NetconfOperationRouterImpl.java

   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 java.util.Collections;
  14 import java.util.HashSet;
  15 import java.util.Map;
  16 import java.util.NavigableMap;
  17 import java.util.Set;
  18 import java.util.TreeMap;
  19 import org.opendaylight.controller.netconf.api.NetconfDocumentedException;
  20 import org.opendaylight.controller.netconf.impl.DefaultCommitNotificationProducer;
  21 import org.opendaylight.controller.netconf.impl.NetconfServerSession;
  22 import org.opendaylight.controller.netconf.impl.mapping.CapabilityProvider;
  23 import org.opendaylight.controller.netconf.impl.mapping.operations.DefaultCloseSession;
  24 import org.opendaylight.controller.netconf.impl.mapping.operations.DefaultCommit;
  25 import org.opendaylight.controller.netconf.impl.mapping.operations.DefaultGetSchema;
  26 import org.opendaylight.controller.netconf.impl.mapping.operations.DefaultNetconfOperation;
  27 import org.opendaylight.controller.netconf.impl.mapping.operations.DefaultStartExi;
  28 import org.opendaylight.controller.netconf.impl.mapping.operations.DefaultStopExi;
  29 import org.opendaylight.controller.netconf.mapping.api.HandlingPriority;
  30 import org.opendaylight.controller.netconf.mapping.api.NetconfOperation;
  31 import org.opendaylight.controller.netconf.mapping.api.NetconfOperationChainedExecution;
  32 import org.opendaylight.controller.netconf.mapping.api.NetconfOperationService;
  33 import org.opendaylight.controller.netconf.mapping.api.NetconfOperationServiceSnapshot;
  34 import org.opendaylight.controller.netconf.util.xml.XmlUtil;
  35 import org.slf4j.Logger;
  36 import org.slf4j.LoggerFactory;
  37 import org.w3c.dom.Document;
  38
  39 public class NetconfOperationRouterImpl implements NetconfOperationRouter {
  40
  41     private static final Logger LOG = LoggerFactory.getLogger(NetconfOperationRouterImpl.class);
  42
  43     private final NetconfOperationServiceSnapshot netconfOperationServiceSnapshot;
  44     private Set<NetconfOperation> allNetconfOperations;
  45
  46     private NetconfOperationRouterImpl(final NetconfOperationServiceSnapshot netconfOperationServiceSnapshot) {
  47         this.netconfOperationServiceSnapshot = netconfOperationServiceSnapshot;
  48     }
  49
  50     private synchronized void initNetconfOperations(final Set<NetconfOperation> allOperations) {
  51         allNetconfOperations = allOperations;
  52     }
  53
  54     /**
  55      * Factory method to produce instance of NetconfOperationRouter
  56      */
  57     public static NetconfOperationRouter createOperationRouter(final NetconfOperationServiceSnapshot netconfOperationServiceSnapshot,
  58                                                                final CapabilityProvider capabilityProvider, final 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(final Set<NetconfOperation> defaultNetconfOperations,
  79             final 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),
  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(final Document message,
  96             final NetconfServerSession session) throws NetconfDocumentedException {
  97         Preconditions.checkNotNull(allNetconfOperations, "Operation router was not initialized properly");
  98
  99         NetconfOperationExecution netconfOperationExecution;
 100
 101         String messageAsString = "";
 102         try {
 103             messageAsString = XmlUtil.toString(message);
 104             netconfOperationExecution = getNetconfOperationWithHighestPriority(message, session);
 105         } catch (IllegalArgumentException | IllegalStateException e) {
 106             LOG.warn("Unable to handle rpc {} on session {}", messageAsString, session, e);
 107
 108             String errorMessage = String.format("Unable to handle rpc %s on session %s", messageAsString, session);
 109             Map<String, String> errorInfo = Maps.newHashMap();
 110
 111             NetconfDocumentedException.ErrorTag tag;
 112             if (e instanceof IllegalArgumentException) {
 113                 errorInfo.put(NetconfDocumentedException.ErrorTag.operation_not_supported.toString(), e.getMessage());
 114                 tag = NetconfDocumentedException.ErrorTag.operation_not_supported;
 115             } else {
 116                 errorInfo.put(NetconfDocumentedException.ErrorTag.operation_failed.toString(), e.getMessage());
 117                 tag = NetconfDocumentedException.ErrorTag.operation_failed;
 118             }
 119
 120             throw new NetconfDocumentedException(errorMessage, e, NetconfDocumentedException.ErrorType.application,
 121                     tag, NetconfDocumentedException.ErrorSeverity.error, errorInfo);
 122         } catch (RuntimeException e) {
 123             throw handleUnexpectedEx("Unexpected exception during netconf operation sort", e);
 124         }
 125
 126         try {
 127             return executeOperationWithHighestPriority(message, netconfOperationExecution, messageAsString);
 128         } catch (RuntimeException e) {
 129             throw handleUnexpectedEx("Unexpected exception during netconf operation execution", e);
 130         }
 131     }
 132
 133     @Override
 134     public void close() throws Exception {
 135         netconfOperationServiceSnapshot.close();
 136     }
 137
 138     private NetconfDocumentedException handleUnexpectedEx(final String s, final Exception e) throws NetconfDocumentedException {
 139         LOG.error(s, e);
 140
 141         Map<String, String> info = Maps.newHashMap();
 142         info.put(NetconfDocumentedException.ErrorSeverity.error.toString(), e.toString());
 143         return new NetconfDocumentedException("Unexpected error",
 144                 NetconfDocumentedException.ErrorType.application,
 145                 NetconfDocumentedException.ErrorTag.operation_failed,
 146                 NetconfDocumentedException.ErrorSeverity.error, info);
 147     }
 148
 149     private Document executeOperationWithHighestPriority(final Document message,
 150             final NetconfOperationExecution netconfOperationExecution, final String messageAsString)
 151             throws NetconfDocumentedException {
 152         LOG.debug("Forwarding netconf message {} to {}", messageAsString, netconfOperationExecution.netconfOperation);
 153         return netconfOperationExecution.execute(message);
 154     }
 155
 156     private NetconfOperationExecution getNetconfOperationWithHighestPriority(
 157             final Document message, final NetconfServerSession session) throws NetconfDocumentedException {
 158
 159         NavigableMap<HandlingPriority, NetconfOperation> sortedByPriority = getSortedNetconfOperationsWithCanHandle(
 160                 message, session);
 161
 162         if (sortedByPriority.isEmpty()) {
 163             throw new IllegalArgumentException(String.format("No %s available to handle message %s",
 164                 NetconfOperation.class.getName(), XmlUtil.toString(message)));
 165         }
 166
 167         return NetconfOperationExecution.createExecutionChain(sortedByPriority, sortedByPriority.lastKey());
 168     }
 169
 170     private TreeMap<HandlingPriority, NetconfOperation> getSortedNetconfOperationsWithCanHandle(final Document message,
 171             final NetconfServerSession session) throws NetconfDocumentedException {
 172         TreeMap<HandlingPriority, NetconfOperation> sortedPriority = Maps.newTreeMap();
 173
 174         for (NetconfOperation netconfOperation : allNetconfOperations) {
 175             final HandlingPriority handlingPriority = netconfOperation.canHandle(message);
 176             if (netconfOperation instanceof DefaultNetconfOperation) {
 177                 ((DefaultNetconfOperation) netconfOperation).setNetconfSession(session);
 178             }
 179             if (!handlingPriority.equals(HandlingPriority.CANNOT_HANDLE)) {
 180
 181                 Preconditions.checkState(!sortedPriority.containsKey(handlingPriority),
 182                         "Multiple %s available to handle message %s with priority %s",
 183                         NetconfOperation.class.getName(), message, handlingPriority);
 184                 sortedPriority.put(handlingPriority, netconfOperation);
 185             }
 186         }
 187         return sortedPriority;
 188     }
 189
 190     public static final NetconfOperationChainedExecution EXECUTION_TERMINATION_POINT = new NetconfOperationChainedExecution() {
 191         @Override
 192         public boolean isExecutionTermination() {
 193             return true;
 194         }
 195
 196         @Override
 197         public Document execute(final Document requestMessage) throws NetconfDocumentedException {
 198             throw new NetconfDocumentedException("This execution represents the termination point in operation execution and cannot be executed itself",
 199                     NetconfDocumentedException.ErrorType.application,
 200                     NetconfDocumentedException.ErrorTag.operation_failed,
 201                     NetconfDocumentedException.ErrorSeverity.error);
 202         }
 203     };
 204
 205     private static class NetconfOperationExecution implements NetconfOperationChainedExecution {
 206         private final NetconfOperation netconfOperation;
 207         private final NetconfOperationChainedExecution subsequentExecution;
 208
 209         private NetconfOperationExecution(final NetconfOperation netconfOperation, final NetconfOperationChainedExecution subsequentExecution) {
 210             this.netconfOperation = netconfOperation;
 211             this.subsequentExecution = subsequentExecution;
 212         }
 213
 214         @Override
 215         public boolean isExecutionTermination() {
 216             return false;
 217         }
 218
 219         @Override
 220         public Document execute(final Document message) throws NetconfDocumentedException {
 221             return netconfOperation.handle(message, subsequentExecution);
 222         }
 223
 224         public static NetconfOperationExecution createExecutionChain(
 225                 final NavigableMap<HandlingPriority, NetconfOperation> sortedByPriority, final HandlingPriority handlingPriority) {
 226             NetconfOperation netconfOperation = sortedByPriority.get(handlingPriority);
 227             HandlingPriority subsequentHandlingPriority = sortedByPriority.lowerKey(handlingPriority);
 228
 229             NetconfOperationChainedExecution subsequentExecution = null;
 230
 231             if (subsequentHandlingPriority != null) {
 232                 subsequentExecution = createExecutionChain(sortedByPriority, subsequentHandlingPriority);
 233             } else {
 234                 subsequentExecution = EXECUTION_TERMINATION_POINT;
 235             }
 236
 237             return new NetconfOperationExecution(netconfOperation, subsequentExecution);
 238         }
 239     }
 240
 241     @Override
 242     public String toString() {
 243         return "NetconfOperationRouterImpl{" + "netconfOperationServiceSnapshot=" + netconfOperationServiceSnapshot
 244                 + '}';
 245     }
 246 }