Thomas Vachuska | 4844808 | 2016-02-19 22:14:54 -0800 | [diff] [blame] | 1 | /* |
Brian O'Connor | 5ab426f | 2016-04-09 01:19:45 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Laboratory |
Thomas Vachuska | 4844808 | 2016-02-19 22:14:54 -0800 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.onosproject.store.region.impl; |
| 18 | |
| 19 | import com.google.common.collect.ImmutableSet; |
| 20 | import com.google.common.collect.Sets; |
| 21 | import org.apache.felix.scr.annotations.Activate; |
| 22 | import org.apache.felix.scr.annotations.Component; |
| 23 | import org.apache.felix.scr.annotations.Deactivate; |
| 24 | import org.apache.felix.scr.annotations.Reference; |
| 25 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 26 | import org.apache.felix.scr.annotations.Service; |
| 27 | import org.onlab.util.Identifier; |
| 28 | import org.onosproject.cluster.NodeId; |
| 29 | import org.onosproject.net.DeviceId; |
| 30 | import org.onosproject.net.region.DefaultRegion; |
| 31 | import org.onosproject.net.region.Region; |
| 32 | import org.onosproject.net.region.RegionEvent; |
| 33 | import org.onosproject.net.region.RegionId; |
| 34 | import org.onosproject.net.region.RegionStore; |
| 35 | import org.onosproject.net.region.RegionStoreDelegate; |
| 36 | import org.onosproject.store.AbstractStore; |
| 37 | import org.onosproject.store.serializers.KryoNamespaces; |
| 38 | import org.onosproject.store.service.ConsistentMap; |
| 39 | import org.onosproject.store.service.MapEvent; |
| 40 | import org.onosproject.store.service.MapEventListener; |
| 41 | import org.onosproject.store.service.Serializer; |
| 42 | import org.onosproject.store.service.StorageService; |
| 43 | import org.slf4j.Logger; |
| 44 | |
| 45 | import java.util.Arrays; |
| 46 | import java.util.Collection; |
| 47 | import java.util.HashMap; |
| 48 | import java.util.List; |
| 49 | import java.util.Map; |
| 50 | import java.util.Set; |
| 51 | |
| 52 | import static com.google.common.base.Preconditions.checkArgument; |
| 53 | import static com.google.common.base.Preconditions.checkNotNull; |
| 54 | import static org.onlab.util.Tools.nullIsNotFound; |
| 55 | import static org.onosproject.net.region.RegionEvent.Type.REGION_MEMBERSHIP_CHANGED; |
| 56 | import static org.slf4j.LoggerFactory.getLogger; |
| 57 | |
| 58 | /** |
| 59 | * Consistent store implementation for tracking region definitions and device |
| 60 | * region affiliation. |
| 61 | */ |
| 62 | @Component(immediate = true) |
| 63 | @Service |
| 64 | public class DistributedRegionStore |
| 65 | extends AbstractStore<RegionEvent, RegionStoreDelegate> |
| 66 | implements RegionStore { |
| 67 | |
| 68 | private static final String NO_REGION = "Region does not exist"; |
| 69 | private static final String DUPLICATE_REGION = "Region already exists"; |
| 70 | |
| 71 | private final Logger log = getLogger(getClass()); |
| 72 | |
| 73 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 74 | protected StorageService storageService; |
| 75 | |
| 76 | private ConsistentMap<RegionId, Region> regionsRepo; |
| 77 | private Map<RegionId, Region> regionsById; |
| 78 | |
| 79 | private ConsistentMap<RegionId, Set<DeviceId>> membershipRepo; |
| 80 | private Map<RegionId, Set<DeviceId>> regionDevices; |
| 81 | |
| 82 | private Map<DeviceId, Region> regionsByDevice = new HashMap<>(); |
| 83 | |
| 84 | private final MapEventListener<RegionId, Region> listener = |
| 85 | new InternalRegionListener(); |
| 86 | private final MapEventListener<RegionId, Set<DeviceId>> membershipListener = |
| 87 | new InternalMembershipListener(); |
| 88 | |
| 89 | @Activate |
| 90 | protected void activate() { |
| 91 | Serializer serializer = |
| 92 | Serializer.using(Arrays.asList(KryoNamespaces.API), |
Jonathan Hart | f8ba881 | 2016-07-28 17:36:59 -0700 | [diff] [blame^] | 93 | Identifier.class); |
Thomas Vachuska | 4844808 | 2016-02-19 22:14:54 -0800 | [diff] [blame] | 94 | |
| 95 | regionsRepo = storageService.<RegionId, Region>consistentMapBuilder() |
| 96 | .withSerializer(serializer) |
| 97 | .withName("onos-regions") |
| 98 | .withRelaxedReadConsistency() |
| 99 | .build(); |
| 100 | regionsRepo.addListener(listener); |
| 101 | regionsById = regionsRepo.asJavaMap(); |
| 102 | |
| 103 | membershipRepo = storageService.<RegionId, Set<DeviceId>>consistentMapBuilder() |
| 104 | .withSerializer(serializer) |
| 105 | .withName("onos-region-devices") |
| 106 | .withRelaxedReadConsistency() |
| 107 | .build(); |
| 108 | membershipRepo.addListener(membershipListener); |
| 109 | regionDevices = membershipRepo.asJavaMap(); |
| 110 | log.info("Started"); |
| 111 | } |
| 112 | |
| 113 | @Deactivate |
| 114 | protected void deactivate() { |
| 115 | regionsRepo.removeListener(listener); |
| 116 | membershipRepo.removeListener(membershipListener); |
| 117 | regionsByDevice.clear(); |
| 118 | log.info("Stopped"); |
| 119 | } |
| 120 | |
| 121 | @Override |
| 122 | public Set<Region> getRegions() { |
| 123 | return ImmutableSet.copyOf(regionsById.values()); |
| 124 | } |
| 125 | |
| 126 | @Override |
| 127 | public Region getRegion(RegionId regionId) { |
| 128 | return nullIsNotFound(regionsById.get(regionId), NO_REGION); |
| 129 | } |
| 130 | |
| 131 | @Override |
| 132 | public Region getRegionForDevice(DeviceId deviceId) { |
| 133 | return regionsByDevice.get(deviceId); |
| 134 | } |
| 135 | |
| 136 | @Override |
| 137 | public Set<DeviceId> getRegionDevices(RegionId regionId) { |
| 138 | Set<DeviceId> deviceIds = regionDevices.get(regionId); |
| 139 | return deviceIds != null ? ImmutableSet.copyOf(deviceIds) : ImmutableSet.of(); |
| 140 | } |
| 141 | |
| 142 | @Override |
| 143 | public Region createRegion(RegionId regionId, String name, Region.Type type, |
| 144 | List<Set<NodeId>> masterNodeIds) { |
| 145 | return regionsRepo.compute(regionId, (id, region) -> { |
| 146 | checkArgument(region == null, DUPLICATE_REGION); |
| 147 | return new DefaultRegion(regionId, name, type, masterNodeIds); |
| 148 | }).value(); |
| 149 | } |
| 150 | |
| 151 | @Override |
| 152 | public Region updateRegion(RegionId regionId, String name, Region.Type type, |
| 153 | List<Set<NodeId>> masterNodeIds) { |
| 154 | return regionsRepo.compute(regionId, (id, region) -> { |
| 155 | nullIsNotFound(region, NO_REGION); |
| 156 | return new DefaultRegion(regionId, name, type, masterNodeIds); |
| 157 | }).value(); |
| 158 | } |
| 159 | |
| 160 | @Override |
| 161 | public void removeRegion(RegionId regionId) { |
| 162 | membershipRepo.remove(regionId); |
| 163 | regionsRepo.remove(regionId); |
| 164 | } |
| 165 | |
| 166 | @Override |
| 167 | public void addDevices(RegionId regionId, Collection<DeviceId> deviceIds) { |
Brian Stanke | d09e2ee | 2016-02-26 11:36:46 -0500 | [diff] [blame] | 168 | // Devices can only be a member in one region. Remove the device if it belongs to |
| 169 | // a different region than the region for which we are attempting to add it. |
| 170 | for (DeviceId deviceId : deviceIds) { |
| 171 | Region region = getRegionForDevice(deviceId); |
| 172 | if ((region != null) && (!regionId.id().equals(region.id().id()))) { |
| 173 | Set<DeviceId> deviceIdSet1 = ImmutableSet.of(deviceId); |
| 174 | removeDevices(region.id(), deviceIdSet1); |
| 175 | } |
| 176 | } |
| 177 | |
Thomas Vachuska | 4844808 | 2016-02-19 22:14:54 -0800 | [diff] [blame] | 178 | membershipRepo.compute(regionId, (id, existingDevices) -> { |
| 179 | if (existingDevices == null) { |
| 180 | return ImmutableSet.copyOf(deviceIds); |
| 181 | } else if (!existingDevices.containsAll(deviceIds)) { |
| 182 | return ImmutableSet.<DeviceId>builder() |
| 183 | .addAll(existingDevices) |
| 184 | .addAll(deviceIds) |
| 185 | .build(); |
| 186 | } else { |
| 187 | return existingDevices; |
| 188 | } |
| 189 | }); |
| 190 | |
| 191 | Region region = regionsById.get(regionId); |
| 192 | deviceIds.forEach(deviceId -> regionsByDevice.put(deviceId, region)); |
| 193 | } |
| 194 | |
| 195 | @Override |
| 196 | public void removeDevices(RegionId regionId, Collection<DeviceId> deviceIds) { |
| 197 | membershipRepo.compute(regionId, (id, existingDevices) -> { |
| 198 | if (existingDevices == null || existingDevices.isEmpty()) { |
| 199 | return ImmutableSet.of(); |
| 200 | } else { |
| 201 | return ImmutableSet.<DeviceId>builder() |
| 202 | .addAll(Sets.difference(existingDevices, |
| 203 | ImmutableSet.copyOf(deviceIds))) |
| 204 | .build(); |
| 205 | } |
| 206 | }); |
| 207 | |
| 208 | deviceIds.forEach(deviceId -> regionsByDevice.remove(deviceId)); |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * Listener class to map listener events to the region inventory events. |
| 213 | */ |
| 214 | private class InternalRegionListener implements MapEventListener<RegionId, Region> { |
| 215 | @Override |
| 216 | public void event(MapEvent<RegionId, Region> event) { |
| 217 | Region region = null; |
| 218 | RegionEvent.Type type = null; |
| 219 | switch (event.type()) { |
| 220 | case INSERT: |
| 221 | type = RegionEvent.Type.REGION_ADDED; |
| 222 | region = checkNotNull(event.newValue().value()); |
| 223 | break; |
| 224 | case UPDATE: |
| 225 | type = RegionEvent.Type.REGION_UPDATED; |
| 226 | region = checkNotNull(event.newValue().value()); |
| 227 | break; |
| 228 | case REMOVE: |
| 229 | type = RegionEvent.Type.REGION_REMOVED; |
| 230 | region = checkNotNull(event.oldValue().value()); |
| 231 | break; |
| 232 | default: |
| 233 | log.error("Unsupported event type: " + event.type()); |
| 234 | } |
| 235 | notifyDelegate(new RegionEvent(type, region)); |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * Listener class to map listener events to the region membership events. |
| 241 | */ |
| 242 | private class InternalMembershipListener implements MapEventListener<RegionId, Set<DeviceId>> { |
| 243 | @Override |
| 244 | public void event(MapEvent<RegionId, Set<DeviceId>> event) { |
| 245 | if (event.type() != MapEvent.Type.REMOVE) { |
| 246 | notifyDelegate(new RegionEvent(REGION_MEMBERSHIP_CHANGED, |
| 247 | regionsById.get(event.key()), |
| 248 | event.newValue().value())); |
| 249 | } |
| 250 | } |
| 251 | } |
| 252 | } |