Ayaka Koshibe | 422916f | 2015-01-15 15:30:23 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2015 Open Networking Laboratory |
| 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 | package org.onosproject.provider.nil.link.impl; |
| 17 | |
| 18 | import static com.google.common.base.Strings.isNullOrEmpty; |
| 19 | import static org.onlab.util.Tools.delay; |
| 20 | import static org.onlab.util.Tools.namedThreads; |
| 21 | import static org.slf4j.LoggerFactory.getLogger; |
| 22 | |
| 23 | import java.util.Dictionary; |
| 24 | import java.util.List; |
| 25 | import java.util.concurrent.ConcurrentMap; |
| 26 | import java.util.concurrent.ExecutorService; |
| 27 | import java.util.concurrent.Executors; |
| 28 | import java.util.concurrent.TimeUnit; |
| 29 | |
| 30 | import org.apache.felix.scr.annotations.Activate; |
| 31 | import org.apache.felix.scr.annotations.Component; |
| 32 | import org.apache.felix.scr.annotations.Deactivate; |
| 33 | import org.apache.felix.scr.annotations.Property; |
| 34 | import org.apache.felix.scr.annotations.Reference; |
| 35 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 36 | import org.onosproject.net.ConnectPoint; |
| 37 | import org.onosproject.net.Device; |
| 38 | import org.onosproject.net.DeviceId; |
| 39 | import org.onosproject.net.Link; |
| 40 | import org.onosproject.net.PortNumber; |
| 41 | import org.onosproject.net.device.DeviceEvent; |
| 42 | import org.onosproject.net.device.DeviceListener; |
| 43 | import org.onosproject.net.device.DeviceService; |
| 44 | import org.onosproject.net.link.DefaultLinkDescription; |
| 45 | import org.onosproject.net.link.LinkDescription; |
| 46 | import org.onosproject.net.link.LinkProvider; |
| 47 | import org.onosproject.net.link.LinkProviderRegistry; |
| 48 | import org.onosproject.net.link.LinkProviderService; |
| 49 | import org.onosproject.net.provider.AbstractProvider; |
| 50 | import org.onosproject.net.provider.ProviderId; |
| 51 | import org.osgi.service.component.ComponentContext; |
| 52 | import org.slf4j.Logger; |
| 53 | |
| 54 | import com.google.common.collect.Lists; |
| 55 | import com.google.common.collect.Maps; |
| 56 | |
| 57 | /** |
| 58 | * Provider which advertises fake/nonexistent links to the core. To be used for |
| 59 | * benchmarking only. |
| 60 | */ |
| 61 | @Component(immediate = true) |
| 62 | public class NullLinkProvider extends AbstractProvider implements LinkProvider { |
| 63 | |
| 64 | private final Logger log = getLogger(getClass()); |
| 65 | |
| 66 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 67 | protected DeviceService deviceService; |
| 68 | |
| 69 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 70 | protected LinkProviderRegistry providerRegistry; |
| 71 | |
| 72 | private LinkProviderService providerService; |
| 73 | |
| 74 | private static final boolean FLICKER = false; |
| 75 | private static final int DEFAULT_RATE = 3000; |
| 76 | // For now, static switch port values |
| 77 | private static final PortNumber SRCPORT = PortNumber.portNumber(5); |
| 78 | private static final PortNumber DSTPORT = PortNumber.portNumber(6); |
| 79 | |
| 80 | private final InternalLinkProvider linkProvider = new InternalLinkProvider(); |
| 81 | |
| 82 | // Link descriptions |
| 83 | private final ConcurrentMap<ConnectPoint, LinkDescription> descriptions = Maps |
| 84 | .newConcurrentMap(); |
| 85 | |
| 86 | // Device ID's that have been seen so far |
| 87 | private final List<DeviceId> devices = Lists.newArrayList(); |
| 88 | |
| 89 | private ExecutorService linkDriver = Executors.newFixedThreadPool(1, |
| 90 | namedThreads("null-link-driver")); |
| 91 | |
| 92 | // If true, 'flickers' links by alternating link up/down events at eventRate |
| 93 | @Property(name = "flicker", boolValue = FLICKER, |
| 94 | label = "Setting to flap links") |
| 95 | private boolean flicker = FLICKER; |
| 96 | |
| 97 | // For flicker = true, duration between events in msec. |
| 98 | @Property(name = "eventRate", intValue = DEFAULT_RATE, |
| 99 | label = "Duration between Link Event") |
| 100 | private int eventRate = 3000; |
| 101 | |
| 102 | public NullLinkProvider() { |
| 103 | super(new ProviderId("null", "org.onosproject.provider.nil")); |
| 104 | } |
| 105 | |
| 106 | @Activate |
| 107 | public void activate(ComponentContext context) { |
| 108 | providerService = providerRegistry.register(this); |
| 109 | deviceService.addListener(linkProvider); |
| 110 | modified(context); |
| 111 | if (flicker) { |
| 112 | linkDriver.submit(new LinkDriver()); |
| 113 | } |
| 114 | log.info("started"); |
| 115 | } |
| 116 | |
| 117 | @Deactivate |
| 118 | public void deactivate(ComponentContext context) { |
| 119 | if (flicker) { |
| 120 | try { |
| 121 | linkDriver.awaitTermination(1000, TimeUnit.MILLISECONDS); |
| 122 | } catch (InterruptedException e) { |
| 123 | log.error("LinkBuilder did not terminate"); |
| 124 | } |
| 125 | linkDriver.shutdownNow(); |
| 126 | } |
| 127 | deviceService.removeListener(linkProvider); |
| 128 | providerRegistry.unregister(this); |
| 129 | deviceService = null; |
| 130 | |
| 131 | log.info("stopped"); |
| 132 | } |
| 133 | |
| 134 | public void modified(ComponentContext context) { |
| 135 | if (context == null) { |
| 136 | log.info("No configs, using defaults: flicker={}, eventRate={}", |
| 137 | FLICKER, DEFAULT_RATE); |
| 138 | return; |
| 139 | } |
| 140 | Dictionary<?, ?> properties = context.getProperties(); |
| 141 | |
| 142 | boolean flickSetting; |
| 143 | int newRate; |
| 144 | try { |
| 145 | String s = (String) properties.get("flicker"); |
| 146 | flickSetting = isNullOrEmpty(s) ? flicker : Boolean.valueOf(s); |
| 147 | s = (String) properties.get("eventRate"); |
| 148 | newRate = isNullOrEmpty(s) ? eventRate : Integer.valueOf(s); |
| 149 | } catch (Exception e) { |
| 150 | log.warn(e.getMessage()); |
| 151 | flickSetting = flicker; |
| 152 | newRate = eventRate; |
| 153 | } |
| 154 | |
| 155 | if (flicker != flickSetting) { |
| 156 | flicker = flickSetting; |
| 157 | } |
| 158 | |
| 159 | if (flicker) { |
| 160 | if (eventRate != newRate) { |
| 161 | eventRate = newRate; |
| 162 | } |
| 163 | linkDriver.submit(new LinkDriver()); |
| 164 | } |
| 165 | log.info("Using new settings: flicker={}, eventRate={}", flicker, |
| 166 | eventRate); |
| 167 | } |
| 168 | |
| 169 | /** |
| 170 | * Adds links as devices are found, and generates LinkEvents. |
| 171 | */ |
| 172 | private class InternalLinkProvider implements DeviceListener { |
| 173 | |
| 174 | @Override |
| 175 | public void event(DeviceEvent event) { |
| 176 | switch (event.type()) { |
| 177 | case DEVICE_ADDED: |
| 178 | addLink(event.subject()); |
| 179 | break; |
| 180 | case DEVICE_REMOVED: |
| 181 | removeLink(event.subject()); |
| 182 | break; |
| 183 | default: |
| 184 | break; |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | private void addLink(Device current) { |
| 189 | devices.add(current.id()); |
| 190 | // No link if only one device |
| 191 | if (devices.size() == 1) { |
| 192 | return; |
| 193 | } |
| 194 | |
| 195 | // Attach new device to the last-seen device |
| 196 | DeviceId prev = devices.get(devices.size() - 2); |
| 197 | ConnectPoint src = new ConnectPoint(prev, SRCPORT); |
| 198 | ConnectPoint dst = new ConnectPoint(current.id(), DSTPORT); |
| 199 | |
| 200 | LinkDescription fdesc = new DefaultLinkDescription(src, dst, |
| 201 | Link.Type.DIRECT); |
| 202 | LinkDescription rdesc = new DefaultLinkDescription(dst, src, |
| 203 | Link.Type.DIRECT); |
| 204 | descriptions.put(src, fdesc); |
| 205 | descriptions.put(dst, rdesc); |
| 206 | |
| 207 | providerService.linkDetected(fdesc); |
| 208 | providerService.linkDetected(rdesc); |
| 209 | } |
| 210 | |
| 211 | private void removeLink(Device device) { |
| 212 | providerService.linksVanished(device.id()); |
| 213 | devices.remove(device.id()); |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * Generates link events using fake links. |
| 219 | */ |
| 220 | private class LinkDriver implements Runnable { |
| 221 | |
| 222 | @Override |
| 223 | public void run() { |
| 224 | while (!linkDriver.isShutdown()) { |
| 225 | for (LinkDescription desc : descriptions.values()) { |
| 226 | providerService.linkVanished(desc); |
| 227 | delay(eventRate); |
| 228 | providerService.linkDetected(desc); |
| 229 | delay(eventRate); |
| 230 | } |
| 231 | } |
| 232 | } |
| 233 | } |
| 234 | } |