openstack/net-virt-providers/src/main/java/org/opendaylight/ovsdb/openstack/netvirt/providers/NetvirtProvidersProvider.java

   1 /*
   2  * Copyright (c) 2014, 2015 Red Hat, 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
   9 package org.opendaylight.ovsdb.openstack.netvirt.providers;
  10
  11 import org.opendaylight.ovsdb.openstack.netvirt.api.Constants;
  12
  13 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  14 import org.opendaylight.controller.md.sal.common.api.clustering.Entity;
  15 import org.opendaylight.controller.md.sal.common.api.clustering.CandidateAlreadyRegisteredException;
  16 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipCandidateRegistration;
  17 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipChange;
  18 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipListener;
  19 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipListenerRegistration;
  20 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipService;
  21 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.ProviderContext;
  22 import org.opendaylight.controller.sal.binding.api.BindingAwareProvider;
  23 import org.opendaylight.ovsdb.openstack.netvirt.providers.openflow13.Service;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.table.types.rev131026.TableId;
  25 import org.osgi.framework.BundleContext;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 import java.util.concurrent.atomic.AtomicBoolean;
  30
  31 /**
  32  * @author Sam Hague (shague@redhat.com)
  33  */
  34 public class NetvirtProvidersProvider implements BindingAwareProvider, AutoCloseable {
  35     private static final Logger LOG = LoggerFactory.getLogger(NetvirtProvidersProvider.class);
  36
  37     private BundleContext bundleContext = null;
  38     private static DataBroker dataBroker = null;
  39     private ConfigActivator activator;
  40     private static ProviderContext providerContext = null;
  41     private static EntityOwnershipService entityOwnershipService;
  42     private ProviderEntityListener providerEntityListener = null;
  43     private static AtomicBoolean hasProviderEntityOwnership = new AtomicBoolean(false);
  44     private static short tableOffset;
  45     private NetvirtProvidersConfigImpl netvirtProvidersConfig = null;
  46
  47     public NetvirtProvidersProvider(BundleContext bundleContext, EntityOwnershipService eos, short tableOffset) {
  48         LOG.info("NetvirtProvidersProvider: bundleContext: {}", bundleContext);
  49         this.bundleContext = bundleContext;
  50             entityOwnershipService = eos;
  51         setTableOffset(tableOffset);
  52     }
  53
  54     public static DataBroker getDataBroker() {
  55         return dataBroker;
  56     }
  57
  58     public static ProviderContext getProviderContext() {
  59         return providerContext;
  60     }
  61
  62     public static boolean isMasterProviderInstance() {
  63         return hasProviderEntityOwnership.get();
  64     }
  65
  66     public static void setTableOffset(short tableOffset) {
  67         try {
  68             new TableId((short) (tableOffset + Service.L2_FORWARDING.getTable()));
  69         } catch (IllegalArgumentException e) {
  70             LOG.warn("Invalid table offset: {}", tableOffset, e);
  71             return;
  72         }
  73
  74         LOG.info("setTableOffset: changing from {} to {}",
  75                 NetvirtProvidersProvider.tableOffset, tableOffset);
  76         NetvirtProvidersProvider.tableOffset = tableOffset;
  77     }
  78
  79     public static short getTableOffset() {
  80         return tableOffset;
  81     }
  82
  83     @Override
  84     public void close() throws Exception {
  85         LOG.info("NetvirtProvidersProvider closed");
  86         activator.stop(bundleContext);
  87         providerEntityListener.close();
  88     }
  89
  90     @Override
  91     public void onSessionInitiated(ProviderContext providerContextRef) {
  92         dataBroker = providerContextRef.getSALService(DataBroker.class);
  93         providerContext = providerContextRef;
  94         LOG.info("NetvirtProvidersProvider: onSessionInitiated dataBroker: {}", dataBroker);
  95         this.activator = new ConfigActivator(providerContextRef);
  96         try {
  97             activator.start(bundleContext);
  98         } catch (Exception e) {
  99             LOG.warn("Failed to start Netvirt: ", e);
 100         }
 101         providerEntityListener = new ProviderEntityListener(this, entityOwnershipService);
 102     }
 103
 104     private void handleOwnershipChange(EntityOwnershipChange ownershipChange) {
 105         if (ownershipChange.isOwner()) {
 106             LOG.info("*This* instance of OVSDB netvirt provider is a MASTER instance");
 107             hasProviderEntityOwnership.set(true);
 108         } else {
 109             LOG.info("*This* instance of OVSDB netvirt provider is a SLAVE instance");
 110             hasProviderEntityOwnership.set(false);
 111         }
 112     }
 113
 114     private class ProviderEntityListener implements EntityOwnershipListener {
 115         private NetvirtProvidersProvider provider;
 116         private EntityOwnershipListenerRegistration listenerRegistration;
 117         private EntityOwnershipCandidateRegistration candidateRegistration;
 118
 119         ProviderEntityListener(NetvirtProvidersProvider provider,
 120                                EntityOwnershipService entityOwnershipService) {
 121             this.provider = provider;
 122             this.listenerRegistration =
 123                     entityOwnershipService.registerListener(Constants.NETVIRT_OWNER_ENTITY_TYPE, this);
 124
 125             //register instance entity to get the ownership of the netvirt provider
 126             Entity instanceEntity = new Entity(
 127                     Constants.NETVIRT_OWNER_ENTITY_TYPE, Constants.NETVIRT_OWNER_ENTITY_TYPE);
 128             try {
 129                 this.candidateRegistration = entityOwnershipService.registerCandidate(instanceEntity);
 130             } catch (CandidateAlreadyRegisteredException e) {
 131                 LOG.warn("OVSDB Netvirt Provider instance entity {} was already "
 132                         + "registered for ownership", instanceEntity, e);
 133             }
 134         }
 135
 136         public void close() {
 137             this.listenerRegistration.close();
 138             this.candidateRegistration.close();
 139         }
 140
 141         @Override
 142         public void ownershipChanged(EntityOwnershipChange ownershipChange) {
 143             provider.handleOwnershipChange(ownershipChange);
 144         }
 145     }
 146 }