Ramon Casellas | 03f194f | 2018-11-15 16:06:02 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2018-present Open Networking Foundation |
| 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 | * This work was partially supported by EC H2020 project METRO-HAUL (761727). |
| 17 | */ |
| 18 | |
| 19 | package org.onosproject.drivers.odtn.impl; |
| 20 | |
| 21 | import org.onosproject.net.DeviceId; |
| 22 | import org.onosproject.net.flow.FlowId; |
| 23 | import org.onosproject.net.flow.FlowRule; |
| 24 | import org.slf4j.Logger; |
| 25 | import org.slf4j.LoggerFactory; |
| 26 | |
| 27 | import java.util.Collections; |
| 28 | import java.util.HashMap; |
| 29 | import java.util.HashSet; |
| 30 | import java.util.Map; |
| 31 | import java.util.Set; |
| 32 | |
| 33 | /** |
| 34 | * Stores a set of Rules for given open config based devices in order to properly report them to the store. |
| 35 | */ |
| 36 | public final class OpenConfigConnectionCache { |
| 37 | private static final Logger log = |
| 38 | LoggerFactory.getLogger(OpenConfigConnectionCache.class); |
| 39 | |
| 40 | private Map<DeviceId, Set<FlowRule>> mp = new HashMap<>(); |
| 41 | private Map<DeviceId, Set<FlowRule>> smp = Collections.synchronizedMap(mp); |
| 42 | |
| 43 | private static OpenConfigConnectionCache cache = null; |
| 44 | |
| 45 | //banning public contraction |
| 46 | private OpenConfigConnectionCache() { |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * Initializes the cache if not already present. |
| 51 | * If present returns the existing one. |
| 52 | * |
| 53 | * @return single instance of cache |
| 54 | */ |
| 55 | public static OpenConfigConnectionCache init() { |
| 56 | if (cache == null) { |
| 57 | cache = new OpenConfigConnectionCache(); |
| 58 | } |
| 59 | return cache; |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | * Returns the number of rules stored for a given device. |
| 64 | * |
| 65 | * @param did the device |
| 66 | * @return number of flows stored |
| 67 | */ |
| 68 | public int size(DeviceId did) { |
| 69 | synchronized (smp) { |
| 70 | if (!smp.containsKey(did)) { |
| 71 | return 0; |
| 72 | } |
| 73 | return smp.get(did).size(); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Returns the flow with given Id for the specific device. |
| 79 | * |
| 80 | * @param did device id |
| 81 | * @param flowId flow id |
| 82 | * @return the flow rule |
| 83 | */ |
| 84 | public FlowRule get(DeviceId did, FlowId flowId) { |
| 85 | synchronized (smp) { |
| 86 | if (!smp.containsKey(did)) { |
| 87 | return null; |
| 88 | } |
| 89 | Set<FlowRule> set = smp.get(did); |
| 90 | return set.stream() |
| 91 | .filter(r -> r.id() == flowId) |
| 92 | .findFirst() |
| 93 | .orElse(null); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Returns all the flows for the specific device. |
| 99 | * |
| 100 | * @param did device id |
| 101 | * @return Set of flow rules |
| 102 | */ |
| 103 | public Set<FlowRule> get(DeviceId did) { |
| 104 | synchronized (smp) { |
| 105 | if (!smp.containsKey(did)) { |
| 106 | return null; |
| 107 | } |
| 108 | return smp.get(did); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | /** |
| 113 | * Add a flows for the specific device. |
| 114 | * |
| 115 | * @param did device id |
| 116 | * @param flowRule the flow rule |
| 117 | */ |
| 118 | public void add(DeviceId did, FlowRule flowRule) { |
| 119 | synchronized (smp) { |
| 120 | Set<FlowRule> set; |
| 121 | if (smp.containsKey(did)) { |
| 122 | set = smp.get(did); |
| 123 | } else { |
| 124 | set = new HashSet<FlowRule>(); |
| 125 | log.warn("OpenConfigConnectionCache created for {}", did); |
| 126 | smp.put(did, set); |
| 127 | } |
| 128 | set.add(flowRule); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * Add a flows for the specific device. |
| 134 | * |
| 135 | * @param did device id |
| 136 | * @param flowRule the flow rule |
| 137 | */ |
| 138 | public void remove(DeviceId did, FlowRule flowRule) { |
| 139 | synchronized (smp) { |
| 140 | if (!smp.containsKey(did)) { |
| 141 | return; |
| 142 | } |
| 143 | Set<FlowRule> set = smp.get(did); |
| 144 | set.removeIf(r2 -> r2.id() == flowRule.id()); |
| 145 | } |
| 146 | } |
| 147 | } |