southbound/southbound-impl/src/main/java/org/opendaylight/ovsdb/southbound/SouthboundProvider.java

   1 /*
   2  * Copyright (c) 2014 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.ovsdb.southbound;
   9
  10 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  11 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
  12 import org.opendaylight.controller.md.sal.common.api.clustering.CandidateAlreadyRegisteredException;
  13 import org.opendaylight.controller.md.sal.common.api.clustering.Entity;
  14 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipCandidateRegistration;
  15 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipChange;
  16 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipListener;
  17 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipListenerRegistration;
  18 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipService;
  19 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipState;
  20 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  21 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  22 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.ProviderContext;
  23 import org.opendaylight.controller.sal.binding.api.BindingAwareProvider;
  24 import org.opendaylight.ovsdb.lib.OvsdbConnection;
  25 import org.opendaylight.ovsdb.lib.impl.OvsdbConnectionService;
  26 import org.opendaylight.ovsdb.southbound.transactions.md.TransactionInvoker;
  27 import org.opendaylight.ovsdb.southbound.transactions.md.TransactionInvokerImpl;
  28 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  29 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopologyBuilder;
  30 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  31 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyBuilder;
  32 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  33 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36
  37 import com.google.common.base.Optional;
  38 import com.google.common.util.concurrent.CheckedFuture;
  39
  40 public class SouthboundProvider implements BindingAwareProvider, AutoCloseable {
  41
  42     private static final Logger LOG = LoggerFactory.getLogger(SouthboundProvider.class);
  43     private static final String ENTITY_TYPE = "ovsdb-southbound-provider";
  44
  45     public static DataBroker getDb() {
  46         return db;
  47     }
  48
  49     private static DataBroker db;
  50     private OvsdbConnectionManager cm;
  51     private TransactionInvoker txInvoker;
  52     private OvsdbDataChangeListener ovsdbDataChangeListener;
  53     private EntityOwnershipService entityOwnershipService;
  54     private EntityOwnershipCandidateRegistration registration;
  55     private SouthboundPluginInstanceEntityOwnershipListener providerOwnershipChangeListener;
  56     private OvsdbConnection ovsdbConnection;
  57
  58
  59     public SouthboundProvider(
  60             EntityOwnershipService entityOwnershipServiceDependency) {
  61         this.entityOwnershipService = entityOwnershipServiceDependency;
  62         registration = null;
  63     }
  64
  65     @Override
  66     public void onSessionInitiated(ProviderContext session) {
  67         LOG.info("SouthboundProvider Session Initiated");
  68         db = session.getSALService(DataBroker.class);
  69         this.txInvoker = new TransactionInvokerImpl(db);
  70         cm = new OvsdbConnectionManager(db,txInvoker,entityOwnershipService);
  71         ovsdbDataChangeListener = new OvsdbDataChangeListener(db,cm);
  72
  73         //Register listener for entityOnwership changes
  74         providerOwnershipChangeListener =
  75                 new SouthboundPluginInstanceEntityOwnershipListener(this,this.entityOwnershipService);
  76         entityOwnershipService.registerListener(ENTITY_TYPE,providerOwnershipChangeListener);
  77
  78         //register instance entity to get the ownership of the provider
  79         Entity instanceEntity = new Entity(ENTITY_TYPE, ENTITY_TYPE);
  80         try {
  81             Optional<EntityOwnershipState> ownershipStateOpt = entityOwnershipService.getOwnershipState(instanceEntity);
  82             registration = entityOwnershipService.registerCandidate(instanceEntity);
  83             if (ownershipStateOpt.isPresent()) {
  84                 EntityOwnershipState ownershipState = ownershipStateOpt.get();
  85                 if (ownershipState.hasOwner() && !ownershipState.isOwner()) {
  86                     if (ovsdbConnection == null) {
  87                         ovsdbConnection = new OvsdbConnectionService();
  88                         ovsdbConnection.registerConnectionListener(cm);
  89                         ovsdbConnection.startOvsdbManager(SouthboundConstants.DEFAULT_OVSDB_PORT);
  90                     }
  91                 }
  92             }
  93         } catch (CandidateAlreadyRegisteredException e) {
  94             LOG.warn("OVSDB Southbound Provider instance entity {} was already "
  95                     + "registered for {} ownership", instanceEntity, e);
  96         }
  97     }
  98
  99     @Override
 100     public void close() throws Exception {
 101         LOG.info("SouthboundProvider Closed");
 102         cm.close();
 103         ovsdbDataChangeListener.close();
 104         registration.close();
 105         providerOwnershipChangeListener.close();
 106     }
 107
 108     private void initializeOvsdbTopology(LogicalDatastoreType type) {
 109         InstanceIdentifier<Topology> path = InstanceIdentifier
 110                 .create(NetworkTopology.class)
 111                 .child(Topology.class, new TopologyKey(SouthboundConstants.OVSDB_TOPOLOGY_ID));
 112         initializeTopology(type);
 113         ReadWriteTransaction transaction = db.newReadWriteTransaction();
 114         CheckedFuture<Optional<Topology>, ReadFailedException> ovsdbTp = transaction.read(type, path);
 115         try {
 116             if (!ovsdbTp.get().isPresent()) {
 117                 TopologyBuilder tpb = new TopologyBuilder();
 118                 tpb.setTopologyId(SouthboundConstants.OVSDB_TOPOLOGY_ID);
 119                 transaction.put(type, path, tpb.build());
 120                 transaction.submit();
 121             } else {
 122                 transaction.cancel();
 123             }
 124         } catch (Exception e) {
 125             LOG.error("Error initializing ovsdb topology", e);
 126         }
 127     }
 128
 129     private void initializeTopology(LogicalDatastoreType type) {
 130         ReadWriteTransaction transaction = db.newReadWriteTransaction();
 131         InstanceIdentifier<NetworkTopology> path = InstanceIdentifier.create(NetworkTopology.class);
 132         CheckedFuture<Optional<NetworkTopology>, ReadFailedException> topology = transaction.read(type,path);
 133         try {
 134             if (!topology.get().isPresent()) {
 135                 NetworkTopologyBuilder ntb = new NetworkTopologyBuilder();
 136                 transaction.put(type,path,ntb.build());
 137                 transaction.submit();
 138             } else {
 139                 transaction.cancel();
 140             }
 141         } catch (Exception e) {
 142             LOG.error("Error initializing ovsdb topology {}",e);
 143         }
 144     }
 145
 146     public void handleOwnershipChange(EntityOwnershipChange ownershipChange) {
 147         if (ownershipChange.isOwner()) {
 148             LOG.info("*This* instance of OVSDB southbound provider is set as a MASTER instance");
 149             LOG.info("Initialize OVSDB topology {} in operational and config data store if not already present"
 150                     ,SouthboundConstants.OVSDB_TOPOLOGY_ID);
 151             initializeOvsdbTopology(LogicalDatastoreType.OPERATIONAL);
 152             initializeOvsdbTopology(LogicalDatastoreType.CONFIGURATION);
 153         } else {
 154             LOG.info("*This* instance of OVSDB southbound provider is set as a SLAVE instance");
 155         }
 156         if (ovsdbConnection == null) {
 157             ovsdbConnection = new OvsdbConnectionService();
 158             ovsdbConnection.registerConnectionListener(cm);
 159             ovsdbConnection.startOvsdbManager(SouthboundConstants.DEFAULT_OVSDB_PORT);
 160         }
 161     }
 162
 163     private class SouthboundPluginInstanceEntityOwnershipListener implements EntityOwnershipListener {
 164         private SouthboundProvider sp;
 165         private EntityOwnershipListenerRegistration listenerRegistration;
 166
 167         SouthboundPluginInstanceEntityOwnershipListener(SouthboundProvider sp,
 168                 EntityOwnershipService entityOwnershipService) {
 169             this.sp = sp;
 170             listenerRegistration = entityOwnershipService.registerListener(ENTITY_TYPE, this);
 171         }
 172
 173         public void close() {
 174             this.listenerRegistration.close();
 175         }
 176         @Override
 177         public void ownershipChanged(EntityOwnershipChange ownershipChange) {
 178             sp.handleOwnershipChange(ownershipChange);
 179         }
 180     }
 181
 182 }