| /* |
| * Copyright 2019-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.p4runtime.ctl.controller; |
| |
| import com.google.common.collect.Maps; |
| import org.apache.commons.lang3.tuple.ImmutablePair; |
| import org.apache.commons.lang3.tuple.Pair; |
| import org.onlab.util.KryoNamespace; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.store.serializers.KryoNamespaces; |
| import org.onosproject.store.service.EventuallyConsistentMap; |
| import org.onosproject.store.service.EventuallyConsistentMapEvent; |
| import org.onosproject.store.service.EventuallyConsistentMapListener; |
| import org.onosproject.store.service.StorageService; |
| 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.math.BigInteger; |
| import java.util.concurrent.ConcurrentMap; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Distributed implementation of MasterElectionIdStore. |
| */ |
| @Component(immediate = true, service = MasterElectionIdStore.class) |
| public class DistributedMasterElectionIdStore implements MasterElectionIdStore { |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected StorageService storageService; |
| |
| private static final KryoNamespace SERIALIZER = KryoNamespace.newBuilder() |
| .register(KryoNamespaces.API) |
| .register(Pair.class) |
| .register(ImmutablePair.class) |
| .register(Long.class) |
| .register(BigInteger.class) |
| .build(); |
| |
| private final Logger log = getLogger(getClass()); |
| private final EventuallyConsistentMapListener<Pair<DeviceId, Long>, BigInteger> mapListener = |
| new InternalMapListener(); |
| |
| private EventuallyConsistentMap<Pair<DeviceId, Long>, BigInteger> masterElectionIds; |
| private ConcurrentMap<Pair<DeviceId, Long>, MasterElectionIdListener> listeners = |
| Maps.newConcurrentMap(); |
| |
| @Activate |
| public void activate() { |
| listeners = Maps.newConcurrentMap(); |
| masterElectionIds = storageService.<Pair<DeviceId, Long>, |
| BigInteger>eventuallyConsistentMapBuilder() |
| .withName("p4runtime-master-election-ids") |
| .withSerializer(SERIALIZER) |
| .withTimestampProvider((k, v) -> new WallClockTimestamp()) |
| .build(); |
| masterElectionIds.addListener(mapListener); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| masterElectionIds.removeListener(mapListener); |
| masterElectionIds.destroy(); |
| masterElectionIds = null; |
| listeners.clear(); |
| listeners = null; |
| log.info("Stopped"); |
| } |
| |
| |
| @Override |
| public void set(DeviceId deviceId, long p4DeviceId, BigInteger electionId) { |
| checkNotNull(deviceId); |
| checkNotNull(electionId); |
| masterElectionIds.put(Pair.of(deviceId, p4DeviceId), electionId); |
| } |
| |
| @Override |
| public BigInteger get(DeviceId deviceId, long p4DeviceId) { |
| checkNotNull(deviceId); |
| return masterElectionIds.get(Pair.of(deviceId, p4DeviceId)); |
| } |
| |
| @Override |
| public void remove(DeviceId deviceId, long p4DeviceId) { |
| checkNotNull(deviceId); |
| masterElectionIds.remove(Pair.of(deviceId, p4DeviceId)); |
| } |
| |
| @Override |
| public void removeAll(DeviceId deviceId) { |
| masterElectionIds.keySet().forEach(k -> { |
| if (k.getLeft().equals(deviceId)) { |
| masterElectionIds.remove(k); |
| } |
| }); |
| } |
| |
| @Override |
| public void setListener(DeviceId deviceId, long p4DeviceId, |
| MasterElectionIdListener newListener) { |
| checkNotNull(deviceId); |
| checkNotNull(newListener); |
| listeners.compute(Pair.of(deviceId, p4DeviceId), (x, existingListener) -> { |
| if (existingListener == null || existingListener == newListener) { |
| return newListener; |
| } else { |
| log.error("Cannot add listener as one already exist for {}", deviceId); |
| return existingListener; |
| } |
| }); |
| } |
| |
| @Override |
| public void unsetListener(DeviceId deviceId, long p4DeviceId) { |
| listeners.remove(Pair.of(deviceId, p4DeviceId)); |
| } |
| |
| private class InternalMapListener implements EventuallyConsistentMapListener<Pair<DeviceId, Long>, BigInteger> { |
| @Override |
| public void event(EventuallyConsistentMapEvent<Pair<DeviceId, Long>, BigInteger> event) { |
| final MasterElectionIdListener listener = listeners.get(event.key()); |
| if (listener == null) { |
| return; |
| } |
| switch (event.type()) { |
| case PUT: |
| listener.updated(event.value()); |
| break; |
| case REMOVE: |
| listener.updated(null); |
| break; |
| default: |
| log.error("Unrecognized map event type {}", event.type()); |
| } |
| } |
| } |
| } |