| /* |
| * Copyright 2015-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onosproject.store.meter.impl; |
| |
| import com.google.common.collect.Collections2; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Maps; |
| import org.apache.commons.lang.math.RandomUtils; |
| import org.onlab.util.KryoNamespace; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.behaviour.MeterQuery; |
| import org.onosproject.net.driver.DriverHandler; |
| import org.onosproject.net.driver.DriverService; |
| import org.onosproject.net.meter.Band; |
| import org.onosproject.net.meter.DefaultBand; |
| import org.onosproject.net.meter.DefaultMeter; |
| import org.onosproject.net.meter.DefaultMeterFeatures; |
| import org.onosproject.net.meter.Meter; |
| import org.onosproject.net.meter.MeterCellId; |
| import org.onosproject.net.meter.MeterEvent; |
| import org.onosproject.net.meter.MeterFailReason; |
| import org.onosproject.net.meter.MeterFeatures; |
| import org.onosproject.net.meter.MeterFeaturesFlag; |
| import org.onosproject.net.meter.MeterFeaturesKey; |
| import org.onosproject.net.meter.MeterId; |
| import org.onosproject.net.meter.MeterKey; |
| import org.onosproject.net.meter.MeterOperation; |
| import org.onosproject.net.meter.MeterScope; |
| import org.onosproject.net.meter.MeterState; |
| import org.onosproject.net.meter.MeterStore; |
| import org.onosproject.net.meter.MeterStoreDelegate; |
| import org.onosproject.net.meter.MeterStoreResult; |
| import org.onosproject.net.meter.MeterTableKey; |
| import org.onosproject.net.pi.model.PiMeterId; |
| import org.onosproject.net.pi.runtime.PiMeterCellId; |
| import org.onosproject.store.AbstractStore; |
| import org.onosproject.store.primitives.DefaultDistributedSet; |
| import org.onosproject.store.serializers.KryoNamespaces; |
| import org.onosproject.store.service.AtomicCounterMap; |
| import org.onosproject.store.service.ConsistentMap; |
| import org.onosproject.store.service.DistributedPrimitive; |
| import org.onosproject.store.service.DistributedSet; |
| import org.onosproject.store.service.EventuallyConsistentMap; |
| import org.onosproject.store.service.EventuallyConsistentMapEvent; |
| import org.onosproject.store.service.EventuallyConsistentMapListener; |
| import org.onosproject.store.service.MapEvent; |
| import org.onosproject.store.service.MapEventListener; |
| import org.onosproject.store.service.Serializer; |
| import org.onosproject.store.service.StorageException; |
| import org.onosproject.store.service.StorageService; |
| import org.onosproject.store.service.Versioned; |
| import org.onosproject.store.service.WallClockTimestamp; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Deactivate; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.component.annotations.ReferenceCardinality; |
| import org.slf4j.Logger; |
| |
| import java.util.Collection; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.stream.Collectors; |
| |
| import static org.onosproject.store.meter.impl.DistributedMeterStore.ReuseStrategy.FIRST_FIT; |
| import static org.onosproject.net.meter.MeterFailReason.TIMEOUT; |
| import static org.onosproject.net.meter.MeterCellId.MeterCellType.INDEX; |
| import static org.onosproject.net.meter.MeterCellId.MeterCellType.PIPELINE_INDEPENDENT; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * A distributed meter store implementation. Meters are stored consistently |
| * across the cluster. |
| */ |
| @Component(immediate = true, service = MeterStore.class) |
| public class DistributedMeterStore extends AbstractStore<MeterEvent, MeterStoreDelegate> |
| implements MeterStore { |
| |
| private Logger log = getLogger(getClass()); |
| |
| // Meters map related objects |
| private static final String METERSTORE = "onos-meter-store"; |
| private ConsistentMap<MeterKey, MeterData> meters; |
| private MapEventListener<MeterKey, MeterData> metersMapListener = new InternalMetersMapEventListener(); |
| private Map<MeterKey, MeterData> metersMap; |
| |
| // Meters features related objects |
| private static final String METERFEATURESSTORE = "onos-meter-features-store"; |
| private EventuallyConsistentMap<MeterTableKey, MeterFeatures> metersFeatures; |
| private EventuallyConsistentMapListener<MeterTableKey, MeterFeatures> featuresMapListener = |
| new InternalFeaturesMapEventListener(); |
| |
| // Meters id related objects |
| private static final String AVAILABLEMETERIDSTORE = "onos-meters-available-store"; |
| // Available meter identifiers |
| private ConcurrentMap<MeterTableKey, DistributedSet<MeterKey>> availableMeterIds; |
| // Atomic counter map for generation of new identifiers; |
| private static final String METERIDSTORE = "onos-meters-id-store"; |
| private AtomicCounterMap<MeterTableKey> meterIdGenerators; |
| |
| // Serializer related objects |
| private static final KryoNamespace.Builder APP_KRYO_BUILDER = KryoNamespace.newBuilder() |
| .register(KryoNamespaces.API) |
| .register(MeterKey.class) |
| .register(MeterData.class) |
| .register(DefaultMeter.class) |
| .register(DefaultBand.class) |
| .register(Band.Type.class) |
| .register(MeterState.class) |
| .register(Meter.Unit.class) |
| .register(MeterFailReason.class); |
| private Serializer serializer = Serializer.using(Lists.newArrayList(APP_KRYO_BUILDER.build())); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| private StorageService storageService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected DriverService driverService; |
| |
| // Local cache to handle async ops through futures. |
| private Map<MeterKey, CompletableFuture<MeterStoreResult>> futures = |
| Maps.newConcurrentMap(); |
| |
| /** |
| * Defines possible selection strategies to reuse meter ids. |
| */ |
| enum ReuseStrategy { |
| /** |
| * Select randomly an available id. |
| */ |
| RANDOM, |
| /** |
| * Select the first one. |
| */ |
| FIRST_FIT |
| } |
| private ReuseStrategy reuseStrategy = FIRST_FIT; |
| |
| @Activate |
| public void activate() { |
| // Init meters map and setup the map listener |
| meters = storageService.<MeterKey, MeterData>consistentMapBuilder() |
| .withName(METERSTORE) |
| .withSerializer(serializer).build(); |
| meters.addListener(metersMapListener); |
| metersMap = meters.asJavaMap(); |
| // Init meter features map |
| metersFeatures = storageService.<MeterTableKey, MeterFeatures>eventuallyConsistentMapBuilder() |
| .withName(METERFEATURESSTORE) |
| .withTimestampProvider((key, features) -> new WallClockTimestamp()) |
| .withSerializer(KryoNamespace.newBuilder() |
| .register(KryoNamespaces.API) |
| .register(MeterTableKey.class) |
| .register(MeterFeatures.class) |
| .register(DefaultMeterFeatures.class) |
| .register(DefaultBand.class) |
| .register(Band.Type.class) |
| .register(Meter.Unit.class) |
| .register(MeterFailReason.class) |
| .register(MeterFeaturesFlag.class)).build(); |
| metersFeatures.addListener(featuresMapListener); |
| // Init the map of the available ids set |
| // Set will be created when a new Meter Features is pushed to the store |
| availableMeterIds = new ConcurrentHashMap<>(); |
| // Init atomic map counters |
| meterIdGenerators = storageService.<MeterTableKey>atomicCounterMapBuilder() |
| .withName(METERIDSTORE) |
| .withSerializer(Serializer.using(KryoNamespaces.API, |
| MeterTableKey.class, |
| MeterScope.class)).build(); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| meters.removeListener(metersMapListener); |
| metersFeatures.removeListener(featuresMapListener); |
| meters.destroy(); |
| metersFeatures.destroy(); |
| availableMeterIds.forEach((key, set) -> { |
| set.destroy(); |
| }); |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public CompletableFuture<MeterStoreResult> storeMeter(Meter meter) { |
| // Init steps |
| CompletableFuture<MeterStoreResult> future = new CompletableFuture<>(); |
| MeterKey key = MeterKey.key(meter.deviceId(), meter.id()); |
| // Store the future related to the operation |
| futures.put(key, future); |
| // Store the meter data |
| MeterData data = new MeterData(meter, null); |
| try { |
| meters.put(key, data); |
| } catch (StorageException e) { |
| log.error("{} thrown a storage exception: {}", e.getStackTrace()[0].getMethodName(), |
| e.getMessage(), e); |
| futures.remove(key); |
| future.completeExceptionally(e); |
| } |
| // Done, return the future |
| return future; |
| } |
| |
| @Override |
| public CompletableFuture<MeterStoreResult> deleteMeter(Meter meter) { |
| // Init steps |
| CompletableFuture<MeterStoreResult> future = new CompletableFuture<>(); |
| MeterKey key = MeterKey.key(meter.deviceId(), meter.id()); |
| // Store the future related to the operation |
| futures.put(key, future); |
| // Create the meter data |
| MeterData data = new MeterData(meter, null); |
| // Update the state of the meter. It will be pruned by observing |
| // that it has been removed from the dataplane. |
| try { |
| // If it does not exist in the system |
| if (meters.computeIfPresent(key, (k, v) -> data) == null) { |
| // Complete immediately |
| future.complete(MeterStoreResult.success()); |
| } |
| } catch (StorageException e) { |
| log.error("{} thrown a storage exception: {}", e.getStackTrace()[0].getMethodName(), |
| e.getMessage(), e); |
| futures.remove(key); |
| future.completeExceptionally(e); |
| } |
| // Done, return the future |
| return future; |
| } |
| |
| @Override |
| public MeterStoreResult storeMeterFeatures(MeterFeatures meterfeatures) { |
| // Store meter features, this is done once for each features of every device |
| MeterStoreResult result = MeterStoreResult.success(); |
| MeterTableKey key = MeterTableKey.key(meterfeatures.deviceId(), meterfeatures.scope()); |
| try { |
| metersFeatures.put(key, meterfeatures); |
| } catch (StorageException e) { |
| log.error("{} thrown a storage exception: {}", e.getStackTrace()[0].getMethodName(), |
| e.getMessage(), e); |
| result = MeterStoreResult.fail(TIMEOUT); |
| } |
| return result; |
| } |
| |
| @Override |
| public MeterStoreResult deleteMeterFeatures(DeviceId deviceId) { |
| MeterStoreResult result = MeterStoreResult.success(); |
| try { |
| Set<MeterTableKey> keys = metersFeatures.keySet().stream() |
| .filter(key -> key.deviceId().equals(deviceId)) |
| .collect(Collectors.toUnmodifiableSet()); |
| keys.forEach(k -> { |
| metersFeatures.remove(k); |
| }); |
| } catch (StorageException e) { |
| log.error("{} thrown a storage exception: {}", e.getStackTrace()[0].getMethodName(), |
| e.getMessage(), e); |
| result = MeterStoreResult.fail(TIMEOUT); |
| } |
| |
| return result; |
| } |
| |
| @Override |
| // TODO Should we remove it ? We are not using it |
| public CompletableFuture<MeterStoreResult> updateMeter(Meter meter) { |
| CompletableFuture<MeterStoreResult> future = new CompletableFuture<>(); |
| MeterKey key = MeterKey.key(meter.deviceId(), meter.id()); |
| futures.put(key, future); |
| |
| MeterData data = new MeterData(meter, null); |
| try { |
| if (meters.computeIfPresent(key, (k, v) -> data) == null) { |
| future.complete(MeterStoreResult.fail(MeterFailReason.INVALID_METER)); |
| } |
| } catch (StorageException e) { |
| log.error("{} thrown a storage exception: {}", e.getStackTrace()[0].getMethodName(), |
| e.getMessage(), e); |
| futures.remove(key); |
| future.completeExceptionally(e); |
| } |
| return future; |
| } |
| |
| @Override |
| public Meter updateMeterState(Meter meter) { |
| // Update meter if present (stats workflow) |
| MeterKey key = MeterKey.key(meter.deviceId(), meter.id()); |
| Versioned<MeterData> value = meters.computeIfPresent(key, (k, v) -> { |
| DefaultMeter m = (DefaultMeter) v.meter(); |
| MeterState meterState = m.state(); |
| if (meterState == MeterState.PENDING_ADD) { |
| m.setState(meter.state()); |
| } |
| m.setProcessedPackets(meter.packetsSeen()); |
| m.setProcessedBytes(meter.bytesSeen()); |
| m.setLife(meter.life()); |
| // TODO: Prune if drops to zero. |
| m.setReferenceCount(meter.referenceCount()); |
| return new MeterData(m, null); |
| }); |
| return value != null ? value.value().meter() : null; |
| } |
| |
| @Override |
| public Meter getMeter(MeterKey key) { |
| MeterData data = Versioned.valueOrElse(meters.get(key), null); |
| return data == null ? null : data.meter(); |
| } |
| |
| @Override |
| public Collection<Meter> getAllMeters() { |
| return Collections2.transform(ImmutableSet.copyOf(metersMap.values()), |
| MeterData::meter); |
| } |
| |
| @Override |
| public Collection<Meter> getAllMeters(DeviceId deviceId) { |
| return Collections2.transform( |
| Collections2.filter(ImmutableSet.copyOf(metersMap.values()), |
| (MeterData m) -> m.meter().deviceId().equals(deviceId)), |
| MeterData::meter); |
| } |
| |
| @Override |
| public void failedMeter(MeterOperation op, MeterFailReason reason) { |
| // Meter ops failed (got notification from the sb) |
| MeterKey key = MeterKey.key(op.meter().deviceId(), op.meter().id()); |
| meters.computeIfPresent(key, (k, v) -> new MeterData(v.meter(), reason)); |
| } |
| |
| @Override |
| public void deleteMeterNow(Meter m) { |
| // This method is renamed in onos-2.5 |
| purgeMeter(m); |
| } |
| |
| @Override |
| public void purgeMeter(Meter m) { |
| // Once we receive the ack from the sb |
| // create the key and remove definitely the meter |
| MeterKey key = MeterKey.key(m.deviceId(), m.id()); |
| try { |
| if (Versioned.valueOrNull(meters.remove(key)) != null) { |
| // Free the id |
| MeterScope scope; |
| if (m.meterCellId().type() == PIPELINE_INDEPENDENT) { |
| PiMeterCellId piMeterCellId = (PiMeterCellId) m.meterCellId(); |
| scope = MeterScope.of(piMeterCellId.meterId().id()); |
| } else { |
| scope = MeterScope.globalScope(); |
| } |
| MeterTableKey meterTableKey = MeterTableKey.key(m.deviceId(), scope); |
| freeMeterId(meterTableKey, m.meterCellId()); |
| } |
| } catch (StorageException e) { |
| log.error("{} thrown a storage exception: {}", e.getStackTrace()[0].getMethodName(), |
| e.getMessage(), e); |
| } |
| } |
| |
| @Override |
| public void purgeMeter(DeviceId deviceId) { |
| // Purge api (typically used when the device is offline) |
| List<Versioned<MeterData>> metersPendingRemove = meters.stream() |
| .filter(e -> Objects.equals(e.getKey().deviceId(), deviceId)) |
| .map(Map.Entry::getValue) |
| .collect(Collectors.toList()); |
| // Remove definitely the meter |
| metersPendingRemove.forEach(versionedMeterKey |
| -> purgeMeter(versionedMeterKey.value().meter())); |
| } |
| |
| @Override |
| public long getMaxMeters(MeterFeaturesKey key) { |
| // Leverage the meter features to know the max id |
| // Create a Meter Table key with FeaturesKey's device and global scope |
| MeterTableKey meterTableKey = MeterTableKey.key(key.deviceId(), MeterScope.globalScope()); |
| return getMaxMeters(meterTableKey); |
| } |
| |
| private long getMaxMeters(MeterTableKey key) { |
| // Leverage the meter features to know the max id |
| MeterFeatures features = metersFeatures.get(key); |
| return features == null ? 0L : features.maxMeter(); |
| } |
| |
| private long getStartIndex(MeterTableKey key) { |
| // Leverage the meter features to know the start id |
| // Since we are using index now |
| // if there is no features related to the key |
| // -1 is returned |
| MeterFeatures features = metersFeatures.get(key); |
| return features == null ? -1L : features.startIndex(); |
| } |
| |
| private long getEndIndex(MeterTableKey key) { |
| // Leverage the meter features to know the max id |
| // Since we are using index now |
| // if there is no features related to the key |
| // -1 is returned |
| MeterFeatures features = metersFeatures.get(key); |
| return features == null ? -1L : features.endIndex(); |
| } |
| |
| // queryMaxMeters is implemented in FullMetersAvailable behaviour. |
| private long queryMaxMeters(DeviceId device) { |
| // Get driver handler for this device |
| DriverHandler handler = driverService.createHandler(device); |
| // If creation failed or the device does not have this behavior |
| if (handler == null || !handler.hasBehaviour(MeterQuery.class)) { |
| // We cannot know max meter |
| return 0L; |
| } |
| // Get the behavior |
| MeterQuery query = handler.behaviour(MeterQuery.class); |
| // Insert a new available key set to the map |
| String setName = AVAILABLEMETERIDSTORE + "-" + device + "global"; |
| MeterTableKey meterTableKey = MeterTableKey.key(device, MeterScope.globalScope()); |
| insertAvailableKeySet(meterTableKey, setName); |
| // Return as max meter the result of the query |
| return query.getMaxMeters(); |
| } |
| |
| private boolean updateMeterIdAvailability(MeterTableKey meterTableKey, MeterCellId id, |
| boolean available) { |
| // Retrieve the set first |
| DistributedSet<MeterKey> keySet = availableMeterIds.get(meterTableKey); |
| if (keySet == null) { |
| // A reusable set should be inserted when a features is pushed |
| log.warn("Reusable Key set for device: {} scope: {} not found", |
| meterTableKey.deviceId(), meterTableKey.scope()); |
| return false; |
| } |
| // According to available, make available or unavailable a meter key |
| DeviceId deviceId = meterTableKey.deviceId(); |
| return available ? keySet.add(MeterKey.key(deviceId, id)) : |
| keySet.remove(MeterKey.key(deviceId, id)); |
| } |
| |
| private MeterCellId getNextAvailableId(Set<MeterCellId> availableIds) { |
| // If there are no available ids |
| if (availableIds.isEmpty()) { |
| // Just end the cycle |
| return null; |
| } |
| // If it is the first fit |
| if (reuseStrategy == FIRST_FIT || availableIds.size() == 1) { |
| return availableIds.iterator().next(); |
| } |
| // If it is random, get the size |
| int size = availableIds.size(); |
| // Return a random element |
| return Iterables.get(availableIds, RandomUtils.nextInt(size)); |
| } |
| |
| // Implements reuse strategy |
| private MeterCellId firstReusableMeterId(MeterTableKey meterTableKey) { |
| // Create a Table key and use it to retrieve the reusable meterCellId set |
| DistributedSet<MeterKey> keySet = availableMeterIds.get(meterTableKey); |
| if (keySet == null) { |
| // A reusable set should be inserted when a features is pushed |
| log.warn("Reusable Key set for device: {} scope: {} not found", |
| meterTableKey.deviceId(), meterTableKey.scope()); |
| return null; |
| } |
| // Filter key related to device id, and reduce to meter ids |
| Set<MeterCellId> localAvailableMeterIds = keySet.stream() |
| .filter(meterKey -> |
| meterKey.deviceId().equals(meterTableKey.deviceId())) |
| .map(MeterKey::meterId) |
| .collect(Collectors.toSet()); |
| // Get next available id |
| MeterCellId meterId = getNextAvailableId(localAvailableMeterIds); |
| // Iterate until there are items |
| while (meterId != null) { |
| // If we are able to reserve the id |
| if (updateMeterIdAvailability(meterTableKey, meterId, false)) { |
| // Just end |
| return meterId; |
| } |
| // Update the set |
| localAvailableMeterIds.remove(meterId); |
| // Try another time |
| meterId = getNextAvailableId(localAvailableMeterIds); |
| } |
| // No reusable ids |
| return null; |
| } |
| |
| @Override |
| public MeterId allocateMeterId(DeviceId deviceId) { |
| // We use global scope for MeterId |
| return (MeterId) allocateMeterId(deviceId, MeterScope.globalScope()); |
| } |
| |
| @Override |
| public MeterCellId allocateMeterId(DeviceId deviceId, MeterScope meterScope) { |
| MeterTableKey meterTableKey = MeterTableKey.key(deviceId, meterScope); |
| MeterCellId meterCellId; |
| long id; |
| // First, search for reusable key |
| meterCellId = firstReusableMeterId(meterTableKey); |
| if (meterCellId != null) { |
| // A reusable key is found |
| return meterCellId; |
| } |
| // If there was no reusable meter id we have to generate a new value |
| // using start and end index as lower and upper bound respectively. |
| long startIndex = getStartIndex(meterTableKey); |
| long endIndex = getEndIndex(meterTableKey); |
| // If the device does not give us MeterFeatures |
| if (startIndex == -1L || endIndex == -1L) { |
| // MeterFeatures couldn't be retrieved, fallback to queryMeters. |
| // Only meaningful to OpenFLow |
| long maxMeters = queryMaxMeters(deviceId); |
| // If we don't know the max, cannot proceed |
| if (maxMeters == 0L) { |
| return null; |
| } else { |
| // OpenFlow meter index starts from 1, ends with max-1 |
| startIndex = 1L; |
| endIndex = maxMeters - 1; |
| } |
| } |
| // Get a new value |
| // If the value is smaller than the start index, get another one |
| do { |
| id = meterIdGenerators.incrementAndGet(meterTableKey); |
| } while (id < startIndex); |
| // Check with the end index, and if the value is bigger, cannot proceed |
| if (id > endIndex) { |
| return null; |
| } |
| // Done, return the value |
| // If we are using global scope, return a MeterId |
| // Else, return a PiMeterId |
| if (meterScope.isGlobal()) { |
| return MeterId.meterId(id); |
| } else { |
| return PiMeterCellId.ofIndirect(PiMeterId.of(meterScope.id()), id); |
| } |
| |
| } |
| |
| @Override |
| public void freeMeterId(DeviceId deviceId, MeterId meterId) { |
| MeterTableKey meterTableKey = MeterTableKey.key(deviceId, MeterScope.globalScope()); |
| freeMeterId(meterTableKey, meterId); |
| } |
| |
| private void freeMeterId(MeterTableKey meterTableKey, MeterCellId meterCellId) { |
| long index; |
| if (meterCellId.type() == PIPELINE_INDEPENDENT) { |
| PiMeterCellId piMeterCellId = (PiMeterCellId) meterCellId; |
| index = piMeterCellId.index(); |
| } else if (meterCellId.type() == INDEX) { |
| MeterId meterId = (MeterId) meterCellId; |
| index = meterId.id(); |
| } else { |
| return; |
| } |
| // Avoid to free meter not allocated |
| if (meterIdGenerators.get(meterTableKey) < index) { |
| return; |
| } |
| // Update the availability |
| updateMeterIdAvailability(meterTableKey, meterCellId, true); |
| } |
| |
| // Enabling the events distribution across the cluster |
| private class InternalMetersMapEventListener implements MapEventListener<MeterKey, MeterData> { |
| @Override |
| public void event(MapEvent<MeterKey, MeterData> event) { |
| MeterKey key = event.key(); |
| Versioned<MeterData> value = event.type() == MapEvent.Type.REMOVE ? event.oldValue() : event.newValue(); |
| MeterData data = value.value(); |
| MeterData oldData = Versioned.valueOrNull(event.oldValue()); |
| switch (event.type()) { |
| case INSERT: |
| case UPDATE: |
| switch (data.meter().state()) { |
| case PENDING_ADD: |
| case PENDING_REMOVE: |
| // Two cases. If there is a reason, the meter operation failed. |
| // Otherwise, we are ready to install/remove through the delegate. |
| if (data.reason().isEmpty()) { |
| notifyDelegate(new MeterEvent(data.meter().state() == MeterState.PENDING_ADD ? |
| MeterEvent.Type.METER_ADD_REQ : MeterEvent.Type.METER_REM_REQ, data.meter())); |
| } else { |
| futures.computeIfPresent(key, (k, v) -> { |
| v.complete(MeterStoreResult.fail(data.reason().get())); |
| return null; |
| }); |
| } |
| break; |
| case ADDED: |
| // Transition from pending to installed |
| if (data.meter().state() == MeterState.ADDED && |
| (oldData != null && oldData.meter().state() == MeterState.PENDING_ADD)) { |
| futures.computeIfPresent(key, (k, v) -> { |
| v.complete(MeterStoreResult.success()); |
| return null; |
| }); |
| notifyDelegate(new MeterEvent(MeterEvent.Type.METER_ADDED, data.meter())); |
| // Update stats case |
| } else if (data.meter().referenceCount() == 0) { |
| notifyDelegate(new MeterEvent(MeterEvent.Type.METER_REFERENCE_COUNT_ZERO, |
| data.meter())); |
| } |
| break; |
| default: |
| log.warn("Unknown meter state type {}", data.meter().state()); |
| } |
| break; |
| case REMOVE: |
| // Meter removal case |
| futures.computeIfPresent(key, (k, v) -> { |
| v.complete(MeterStoreResult.success()); |
| return null; |
| }); |
| // Finally notify the delegate |
| notifyDelegate(new MeterEvent(MeterEvent.Type.METER_REMOVED, data.meter())); |
| break; |
| default: |
| log.warn("Unknown Map event type {}", event.type()); |
| } |
| } |
| } |
| |
| private class InternalFeaturesMapEventListener implements |
| EventuallyConsistentMapListener<MeterTableKey, MeterFeatures> { |
| @Override |
| public void event(EventuallyConsistentMapEvent<MeterTableKey, MeterFeatures> event) { |
| MeterTableKey meterTableKey = event.key(); |
| MeterFeatures meterFeatures = event.value(); |
| switch (event.type()) { |
| case PUT: |
| // Put a new available meter id set to the map |
| String setName = AVAILABLEMETERIDSTORE + "-" + |
| meterFeatures.deviceId() + meterFeatures.scope().id(); |
| insertAvailableKeySet(meterTableKey, setName); |
| break; |
| case REMOVE: |
| // Remove the set |
| DistributedSet<MeterKey> set = availableMeterIds.remove(meterTableKey); |
| if (set != null) { |
| set.destroy(); |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| private void insertAvailableKeySet(MeterTableKey meterTableKey, String setName) { |
| DistributedSet<MeterKey> availableMeterIdSet = |
| new DefaultDistributedSet<>(storageService.<MeterKey>setBuilder() |
| .withName(setName) |
| .withSerializer(Serializer.using(KryoNamespaces.API, |
| MeterKey.class)).build(), |
| DistributedPrimitive.DEFAULT_OPERATION_TIMEOUT_MILLIS); |
| availableMeterIds.put(meterTableKey, availableMeterIdSet); |
| } |
| } |