bgp/rib-impl/src/main/java/org/opendaylight/protocol/bgp/rib/impl/config/BGPClusterSingletonService.java

   1 /*
   2  * Copyright (c) 2017 AT&T Intellectual Property. 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
   9 package org.opendaylight.protocol.bgp.rib.impl.config;
  10
  11 import static org.opendaylight.protocol.bgp.rib.impl.config.OpenConfigMappingUtil.getNeighborInstanceIdentifier;
  12 import static org.opendaylight.protocol.bgp.rib.impl.config.OpenConfigMappingUtil.getNeighborInstanceName;
  13 import static org.opendaylight.protocol.bgp.rib.impl.config.OpenConfigMappingUtil.getRibInstanceName;
  14
  15 import com.google.common.util.concurrent.FutureCallback;
  16 import com.google.common.util.concurrent.Futures;
  17 import com.google.common.util.concurrent.ListenableFuture;
  18 import com.google.common.util.concurrent.MoreExecutors;
  19 import com.google.common.util.concurrent.SettableFuture;
  20 import java.util.ArrayList;
  21 import java.util.Dictionary;
  22 import java.util.HashMap;
  23 import java.util.Hashtable;
  24 import java.util.List;
  25 import java.util.Map;
  26 import java.util.concurrent.TimeUnit;
  27 import java.util.concurrent.atomic.AtomicBoolean;
  28 import java.util.stream.Collectors;
  29 import javax.annotation.Nonnull;
  30 import javax.annotation.concurrent.GuardedBy;
  31 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  32 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonService;
  33 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceProvider;
  34 import org.opendaylight.mdsal.singleton.common.api.ServiceGroupIdentifier;
  35 import org.opendaylight.protocol.bgp.openconfig.spi.BGPTableTypeRegistryConsumer;
  36 import org.opendaylight.protocol.bgp.rib.impl.spi.InstanceType;
  37 import org.opendaylight.protocol.bgp.rib.spi.util.ClusterSingletonServiceRegistrationHelper;
  38 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.neighbors.Neighbor;
  39 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.top.Bgp;
  40 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.top.bgp.Global;
  41 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.rev151009.bgp.top.bgp.Neighbors;
  42 import org.opendaylight.yangtools.yang.binding.DataObject;
  43 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  44 import org.osgi.framework.BundleContext;
  45 import org.osgi.framework.ServiceRegistration;
  46 import org.osgi.service.blueprint.container.BlueprintContainer;
  47 import org.slf4j.Logger;
  48 import org.slf4j.LoggerFactory;
  49
  50 public final class BGPClusterSingletonService implements ClusterSingletonService, AutoCloseable {
  51
  52     private static final Logger LOG = LoggerFactory.getLogger(BGPClusterSingletonService.class);
  53
  54     private static final long TIMEOUT_NS = TimeUnit.SECONDS.toNanos(5);
  55     private final InstanceIdentifier<Bgp> bgpIid;
  56     @GuardedBy("this")
  57     private final Map<InstanceIdentifier<Neighbor>, PeerBean> peers = new HashMap<>();
  58     private final BGPTableTypeRegistryConsumer tableTypeRegistry;
  59     private final BlueprintContainer container;
  60     private final BundleContext bundleContext;
  61     private final ServiceGroupIdentifier serviceGroupIdentifier;
  62     private final AtomicBoolean instantiated = new AtomicBoolean(false);
  63     private RibImpl ribImpl;
  64
  65     BGPClusterSingletonService(
  66             @Nonnull final ClusterSingletonServiceProvider provider,
  67             @Nonnull final BGPTableTypeRegistryConsumer tableTypeRegistry,
  68             @Nonnull final BlueprintContainer container,
  69             @Nonnull final BundleContext bundleContext,
  70             @Nonnull final InstanceIdentifier<Bgp> bgpIid) {
  71         this.tableTypeRegistry = tableTypeRegistry;
  72         this.container = container;
  73         this.bundleContext = bundleContext;
  74         this.bgpIid = bgpIid;
  75         final String ribInstanceName = getRibInstanceName(bgpIid);
  76         this.serviceGroupIdentifier = ServiceGroupIdentifier.create(ribInstanceName + "-service-group");
  77         LOG.info("BGPClusterSingletonService {} registered", this.serviceGroupIdentifier.getValue());
  78         ClusterSingletonServiceRegistrationHelper
  79                 .registerSingletonService(provider, this);
  80     }
  81
  82     @Override
  83     public synchronized void instantiateServiceInstance() {
  84         if (this.ribImpl != null) {
  85             this.ribImpl.instantiateServiceInstance();
  86             this.peers.values().forEach(PeerBean::instantiateServiceInstance);
  87         }
  88         this.instantiated.set(true);
  89         LOG.info("BGPClusterSingletonService {} instantiated", this.serviceGroupIdentifier.getValue());
  90     }
  91
  92     @Override
  93     public synchronized ListenableFuture<Void> closeServiceInstance() {
  94         LOG.info("BGPClusterSingletonService {} close service instance", this.serviceGroupIdentifier.getValue());
  95         this.instantiated.set(false);
  96
  97         final List<ListenableFuture<Void>> futurePeerCloseList = this.peers.values().stream()
  98                 .map(PeerBean::closeServiceInstance).collect(Collectors.toList());
  99         final SettableFuture<Void> done = SettableFuture.create();
 100         Futures.addCallback(Futures.allAsList(futurePeerCloseList), new FutureCallback<List<Void>>() {
 101             @Override
 102             public void onSuccess(final List<Void> result) {
 103                 done.setFuture(BGPClusterSingletonService.this.ribImpl.closeServiceInstance());
 104             }
 105
 106             @Override
 107             public void onFailure(final Throwable throwable) {
 108                 LOG.warn("Failed removing peers {}", throwable);
 109             }
 110         }, MoreExecutors.directExecutor());
 111         return done;
 112     }
 113
 114     @Nonnull
 115     @Override
 116     public ServiceGroupIdentifier getIdentifier() {
 117         return this.serviceGroupIdentifier;
 118     }
 119
 120     synchronized void onGlobalChanged(final DataObjectModification<Global> dataObjectModification) {
 121         switch (dataObjectModification.getModificationType()) {
 122             case DELETE:
 123                 LOG.debug("Removing RIB instance: {}", this.bgpIid);
 124                 if (this.ribImpl != null) {
 125                     LOG.debug("RIB instance removed {}", this.ribImpl);
 126                     closeAllBindedPeers();
 127                     closeRibService();
 128                 }
 129                 break;
 130             case SUBTREE_MODIFIED:
 131             case WRITE:
 132                 final Global global = dataObjectModification.getDataAfter();
 133                 if (this.ribImpl == null) {
 134                     onGlobalCreated(global);
 135                 } else if (!this.ribImpl.isGlobalEqual(global)) {
 136                     onGlobalUpdated(global);
 137                 }
 138                 break;
 139             default:
 140                 break;
 141         }
 142     }
 143
 144     private synchronized void onGlobalCreated(final Global global) {
 145         LOG.debug("Creating RIB instance with configuration: {}", global);
 146         this.ribImpl = (RibImpl) this.container.getComponentInstance(InstanceType.RIB.getBeanName());
 147         initiateRibInstance(global, this.ribImpl);
 148         LOG.debug("RIB instance created: {}", this.ribImpl);
 149     }
 150
 151     private synchronized void onGlobalUpdated(final Global global) {
 152         LOG.debug("Modifying RIB instance with configuration: {}", global);
 153         final List<PeerBean> closedPeers = closeAllBindedPeers();
 154         closeRibService();
 155         initiateRibInstance(global, this.ribImpl);
 156         closedPeers.forEach(peer -> peer.restart(this.ribImpl, this.tableTypeRegistry));
 157         if (this.instantiated.get()) {
 158             closedPeers.forEach(PeerBean::instantiateServiceInstance);
 159         }
 160         LOG.debug("RIB instance created: {}", this.ribImpl);
 161     }
 162
 163     private void closeRibService() {
 164         try {
 165             this.ribImpl.closeServiceInstance().get(TIMEOUT_NS, TimeUnit.NANOSECONDS);
 166         } catch (final Exception e) {
 167             LOG.error("RIB instance failed to close service instance", e);
 168         }
 169         this.ribImpl.close();
 170     }
 171
 172     private synchronized void initiateRibInstance(final Global global, final RibImpl ribImpl) {
 173         final String ribInstanceName = getRibInstanceName(this.bgpIid);
 174         ribImpl.start(global, ribInstanceName, this.tableTypeRegistry);
 175         registerRibInstance(ribImpl, ribInstanceName);
 176         if (this.instantiated.get()) {
 177             this.ribImpl.instantiateServiceInstance();
 178         }
 179     }
 180
 181     private synchronized List<PeerBean> closeAllBindedPeers() {
 182         final List<PeerBean> filtered = new ArrayList<>();
 183         this.peers.forEach((key, peer) -> {
 184             try {
 185                 peer.closeServiceInstance().get();
 186             } catch (final Exception e) {
 187                 LOG.error("Peer instance failed to close service instance", e);
 188             }
 189             peer.close();
 190             filtered.add(peer);
 191         });
 192         return filtered;
 193     }
 194
 195     private synchronized void registerRibInstance(final RibImpl ribImpl, final String ribInstanceName) {
 196         final Dictionary<String, String> properties = new Hashtable<>();
 197         properties.put(InstanceType.RIB.getBeanName(), ribInstanceName);
 198         final ServiceRegistration<?> serviceRegistration = this.bundleContext.registerService(
 199                 InstanceType.RIB.getServices(), ribImpl, properties);
 200         ribImpl.setServiceRegistration(serviceRegistration);
 201     }
 202
 203     @Override
 204     public void close() throws Exception {
 205         LOG.info("BGPClusterSingletonService {} close", this.serviceGroupIdentifier.getValue());
 206         this.peers.values().iterator().forEachRemaining(PeerBean::close);
 207         this.ribImpl.close();
 208         this.peers.clear();
 209         this.ribImpl = null;
 210     }
 211
 212     synchronized void onNeighborsChanged(final DataObjectModification<Neighbors> dataObjectModification) {
 213         for (final DataObjectModification<? extends DataObject> neighborModification :
 214                 dataObjectModification.getModifiedChildren()) {
 215             switch (neighborModification.getModificationType()) {
 216                 case DELETE:
 217                     onNeighborRemoved((Neighbor) neighborModification.getDataBefore());
 218                     break;
 219                 case SUBTREE_MODIFIED:
 220                 case WRITE:
 221                     onNeighborModified((Neighbor) neighborModification.getDataAfter());
 222                     break;
 223                 default:
 224                     break;
 225             }
 226         }
 227     }
 228
 229     private synchronized void onNeighborModified(final Neighbor neighbor) {
 230         //restart peer instance with a new configuration
 231         final PeerBean bgpPeer = this.peers.get(getNeighborInstanceIdentifier(this.bgpIid, neighbor.getKey()));
 232         if (bgpPeer == null) {
 233             onNeighborCreated(neighbor);
 234         } else if (!bgpPeer.containsEqualConfiguration(neighbor)) {
 235             onNeighborUpdated(bgpPeer, neighbor);
 236         }
 237     }
 238
 239
 240     private synchronized void onNeighborCreated(final Neighbor neighbor) {
 241         LOG.debug("Creating Peer instance with configuration: {}", neighbor);
 242         final PeerBean bgpPeer;
 243         if (OpenConfigMappingUtil.isApplicationPeer(neighbor)) {
 244             bgpPeer = (PeerBean) this.container.getComponentInstance(InstanceType.APP_PEER.getBeanName());
 245         } else {
 246             bgpPeer = (PeerBean) this.container.getComponentInstance(InstanceType.PEER.getBeanName());
 247         }
 248         final InstanceIdentifier<Neighbor> neighborInstanceIdentifier =
 249                 getNeighborInstanceIdentifier(this.bgpIid, neighbor.getKey());
 250         initiatePeerInstance(neighborInstanceIdentifier, neighbor, bgpPeer);
 251         this.peers.put(neighborInstanceIdentifier, bgpPeer);
 252         LOG.debug("Peer instance created {}", bgpPeer);
 253     }
 254
 255     private synchronized void onNeighborUpdated(final PeerBean bgpPeer, final Neighbor neighbor) {
 256         LOG.debug("Updating Peer instance with configuration: {}", neighbor);
 257         closePeer(bgpPeer);
 258
 259         final InstanceIdentifier<Neighbor> neighborInstanceIdentifier = getNeighborInstanceIdentifier(this.bgpIid,
 260                 neighbor.getKey());
 261         initiatePeerInstance(neighborInstanceIdentifier, neighbor, bgpPeer);
 262         LOG.debug("Peer instance updated {}", bgpPeer);
 263     }
 264
 265     private void closePeer(final PeerBean bgpPeer) {
 266         if (bgpPeer != null) {
 267             try {
 268                 bgpPeer.closeServiceInstance().get();
 269                 bgpPeer.close();
 270                 LOG.debug("Peer instance closed {}", bgpPeer);
 271             } catch (final Exception e) {
 272                 LOG.error("Peer instance failed to close service instance", e);
 273             }
 274         }
 275     }
 276
 277     private synchronized void onNeighborRemoved(final Neighbor neighbor) {
 278         LOG.debug("Removing Peer instance: {}", neighbor);
 279         final PeerBean bgpPeer = this.peers.remove(getNeighborInstanceIdentifier(this.bgpIid, neighbor.getKey()));
 280         closePeer(bgpPeer);
 281     }
 282
 283     private synchronized void registerPeerInstance(final BgpPeer bgpPeer, final String peerInstanceName) {
 284         final Dictionary<String, String> properties = new Hashtable<>();
 285         properties.put(InstanceType.PEER.getBeanName(), peerInstanceName);
 286         final ServiceRegistration<?> serviceRegistration = this.bundleContext
 287                 .registerService(InstanceType.PEER.getServices(), bgpPeer, properties);
 288         bgpPeer.setServiceRegistration(serviceRegistration);
 289     }
 290
 291     private synchronized void registerAppPeerInstance(final AppPeer appPeer, final String peerInstanceName) {
 292         final Dictionary<String, String> properties = new Hashtable<>();
 293         properties.put(InstanceType.PEER.getBeanName(), peerInstanceName);
 294         final ServiceRegistration<?> serviceRegistration = this.bundleContext
 295                 .registerService(InstanceType.APP_PEER.getServices(), appPeer, properties);
 296         appPeer.setServiceRegistration(serviceRegistration);
 297     }
 298
 299     private synchronized void initiatePeerInstance(final InstanceIdentifier<Neighbor> neighborIdentifier,
 300             final Neighbor neighbor, final PeerBean bgpPeer) {
 301         final String peerInstanceName = getNeighborInstanceName(neighborIdentifier);
 302         if (this.ribImpl != null) {
 303             bgpPeer.start(this.ribImpl, neighbor, this.tableTypeRegistry);
 304             if (bgpPeer instanceof BgpPeer) {
 305                 registerPeerInstance((BgpPeer) bgpPeer, peerInstanceName);
 306             } else if (bgpPeer instanceof AppPeer) {
 307                 registerAppPeerInstance((AppPeer) bgpPeer, peerInstanceName);
 308             }
 309         }
 310         if (this.instantiated.get()) {
 311             bgpPeer.instantiateServiceInstance();
 312         }
 313     }
 314 }