| /* |
| * Copyright 2018-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. |
| * |
| * This work was partially supported by EC H2020 project METRO-HAUL (761727). |
| */ |
| |
| package org.onosproject.drivers.odtn.impl; |
| |
| import org.onlab.osgi.DefaultServiceDirectory; |
| import org.onlab.util.KryoNamespace; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.flow.FlowId; |
| import org.onosproject.net.flow.FlowRule; |
| import org.onosproject.store.serializers.KryoNamespaces; |
| import org.onosproject.store.service.EventuallyConsistentMap; |
| import org.onosproject.store.service.StorageService; |
| import org.onosproject.store.service.WallClockTimestamp; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| /** |
| * Stores a set of Rules for given open config based devices in order to properly report them to the store. |
| */ |
| public final class DeviceConnectionCache { |
| private static final Logger log = |
| LoggerFactory.getLogger(DeviceConnectionCache.class); |
| |
| private static final StorageService STORAGE_SERVICE = DefaultServiceDirectory.getService(StorageService.class); |
| |
| private static final String MAP_NAME = "onos-odtn-flow-cache"; |
| |
| private static final KryoNamespace SERIALIZER = KryoNamespace.newBuilder() |
| .register(KryoNamespaces.API) |
| .nextId(KryoNamespaces.BEGIN_USER_CUSTOM_ID) |
| .register(DeviceConnection.class).build(); |
| |
| private EventuallyConsistentMap<DeviceId, Set<DeviceConnection>> |
| flowCache; |
| |
| private static DeviceConnectionCache cache = null; |
| private static final Object CACHE_LOCK = new Object(); |
| |
| //banning public construction |
| private DeviceConnectionCache() { |
| flowCache = STORAGE_SERVICE |
| .<DeviceId, Set<DeviceConnection>>eventuallyConsistentMapBuilder() |
| .withName(MAP_NAME) |
| .withSerializer(SERIALIZER) |
| .withTimestampProvider((k, v) -> new WallClockTimestamp()) |
| .build(); |
| } |
| |
| /** |
| * Initializes the cache if not already present. |
| * If present returns the existing one. |
| * |
| * @return single instance of cache |
| */ |
| public static DeviceConnectionCache init() { |
| synchronized (CACHE_LOCK) { |
| if (cache == null) { |
| cache = new DeviceConnectionCache(); |
| } |
| } |
| return cache; |
| } |
| |
| /** |
| * Returns the number of rules stored for a given device. |
| * |
| * @param did the device |
| * @return number of flows stored |
| */ |
| public int size(DeviceId did) { |
| if (!flowCache.containsKey(did)) { |
| return 0; |
| } |
| return flowCache.get(did).size(); |
| } |
| |
| /** |
| * Returns the flow with given Id for the specific device. |
| * |
| * @param did device id |
| * @param flowId flow id |
| * @return the flow rule |
| */ |
| public FlowRule get(DeviceId did, FlowId flowId) { |
| if (!flowCache.containsKey(did)) { |
| return null; |
| } |
| Set<DeviceConnection> set = flowCache.get(did); |
| DeviceConnection connection = set.stream() |
| .filter(c -> c.getFlowRule().id() == flowId) |
| .findFirst() |
| .orElse(null); |
| return connection != null ? connection.getFlowRule() : null; |
| } |
| |
| /** |
| * Returns the flow with given Id for the specific device. |
| * |
| * @param did device id |
| * @param connectionId the device specific connection id |
| * @return the flow rule |
| */ |
| public FlowRule get(DeviceId did, String connectionId) { |
| if (!flowCache.containsKey(did)) { |
| return null; |
| } |
| Set<DeviceConnection> set = flowCache.get(did); |
| DeviceConnection connection = set.stream() |
| .filter(c -> c.getId().equals(connectionId)) |
| .findFirst() |
| .orElse(null); |
| return connection != null ? connection.getFlowRule() : null; |
| } |
| |
| /** |
| * Returns all the flows for the specific device. |
| * |
| * @param did device id |
| * @return Set of flow rules |
| */ |
| public Set<FlowRule> get(DeviceId did) { |
| if (!flowCache.containsKey(did)) { |
| return null; |
| } |
| return flowCache.get(did).stream() |
| .map(DeviceConnection::getFlowRule) |
| .collect(Collectors.toSet()); |
| } |
| |
| /** |
| * Add to a specific device a flow and a device specific connection id for that flow. |
| * |
| * @param did device id |
| * @param connectionId the device specific connection identifier |
| * @param flowRule the flow rule |
| */ |
| public void add(DeviceId did, String connectionId, FlowRule flowRule) { |
| Set<DeviceConnection> set; |
| if (flowCache.containsKey(did)) { |
| set = flowCache.get(did); |
| } else { |
| set = new HashSet<>(); |
| log.debug("DeviceConnectionCache created for {}", did); |
| flowCache.put(did, set); |
| } |
| set.add(DeviceConnection.of(connectionId, flowRule)); |
| } |
| |
| /** |
| * Add a flows for the specific device. |
| * |
| * @param did device id |
| * @param flowRule the flow rule |
| */ |
| public void remove(DeviceId did, FlowRule flowRule) { |
| if (!flowCache.containsKey(did)) { |
| return; |
| } |
| Set<DeviceConnection> set = flowCache.get(did); |
| set.removeIf(r2 -> r2.getFlowRule().id() == flowRule.id()); |
| } |
| |
| /** |
| * Add a flows for the specific device. |
| * |
| * @param did device id |
| * @param connectionId the connectionId as identified on the Device |
| */ |
| public void remove(DeviceId did, String connectionId) { |
| if (!flowCache.containsKey(did)) { |
| return; |
| } |
| Set<DeviceConnection> set = flowCache.get(did); |
| set.removeIf(r2 -> r2.getId().equals(connectionId)); |
| } |
| } |