ADARA Networks | 1fb1eb1 | 2016-09-01 12:04:07 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2016-present 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 | |
| 17 | package org.onosproject.rabbitmq.listener; |
| 18 | |
| 19 | import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor; |
| 20 | import static org.onlab.util.Tools.groupedThreads; |
| 21 | |
| 22 | import java.util.concurrent.ExecutorService; |
| 23 | |
| 24 | import org.apache.felix.scr.annotations.Activate; |
| 25 | import org.apache.felix.scr.annotations.Component; |
| 26 | import org.apache.felix.scr.annotations.Deactivate; |
| 27 | import org.apache.felix.scr.annotations.Reference; |
| 28 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 29 | import org.onosproject.net.device.DeviceEvent; |
| 30 | import org.onosproject.net.device.DeviceListener; |
| 31 | import org.onosproject.net.device.DeviceService; |
| 32 | import org.onosproject.net.link.LinkEvent; |
| 33 | import org.onosproject.net.link.LinkListener; |
| 34 | import org.onosproject.net.link.LinkService; |
| 35 | import org.onosproject.net.link.ProbedLinkProvider; |
| 36 | import org.onosproject.net.packet.PacketContext; |
| 37 | import org.onosproject.net.packet.PacketProcessor; |
| 38 | import org.onosproject.net.packet.PacketService; |
| 39 | import org.onosproject.net.provider.AbstractProvider; |
| 40 | import org.onosproject.net.provider.ProviderId; |
| 41 | import org.onosproject.net.topology.TopologyEvent; |
| 42 | import org.onosproject.net.topology.TopologyListener; |
| 43 | import org.onosproject.net.topology.TopologyService; |
| 44 | import org.onosproject.rabbitmq.api.MQConstants; |
| 45 | import org.onosproject.rabbitmq.api.MQService; |
| 46 | import org.onosproject.rabbitmq.impl.MQServiceImpl; |
| 47 | import org.osgi.service.component.ComponentContext; |
| 48 | import org.slf4j.Logger; |
| 49 | import org.slf4j.LoggerFactory; |
| 50 | |
| 51 | /** |
| 52 | * Listens to events generated from Device Event/PKT_IN/Topology/Link. |
| 53 | * Then publishes events to rabbitmq server via publish() api. |
| 54 | */ |
| 55 | |
| 56 | @Component(immediate = true) |
| 57 | public class MQEventHandler extends AbstractProvider |
| 58 | implements ProbedLinkProvider { |
| 59 | |
| 60 | private static final Logger log = LoggerFactory.getLogger( |
| 61 | MQEventHandler.class); |
| 62 | private static final String PROVIDER_NAME = MQConstants.ONOS_APP_NAME; |
| 63 | private static final int PKT_PROC_PRIO = 1; |
| 64 | |
| 65 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 66 | protected DeviceService deviceService; |
| 67 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 68 | protected PacketService packetService; |
| 69 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 70 | protected LinkService linkService; |
| 71 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 72 | protected TopologyService topologyService; |
| 73 | |
| 74 | private MQService mqService; |
| 75 | private DeviceListener deviceListener; |
| 76 | protected ExecutorService eventExecutor; |
| 77 | |
| 78 | private final InternalPacketProcessor packetProcessor = |
| 79 | new InternalPacketProcessor(); |
| 80 | private final LinkListener linkListener = new InternalLinkListener(); |
| 81 | private final TopologyListener topologyListener = |
| 82 | new InternalTopologyListener(); |
| 83 | |
| 84 | /** |
| 85 | * Initialize parent class with provider. |
| 86 | */ |
| 87 | public MQEventHandler() { |
| 88 | super(new ProviderId("rabbitmq", PROVIDER_NAME)); |
| 89 | } |
| 90 | |
| 91 | @Activate |
| 92 | protected void activate(ComponentContext context) { |
| 93 | mqService = new MQServiceImpl(context); |
| 94 | eventExecutor = newSingleThreadScheduledExecutor( |
| 95 | groupedThreads("onos/deviceevents", "events-%d", log)); |
| 96 | deviceListener = new InternalDeviceListener(); |
| 97 | deviceService.addListener(deviceListener); |
| 98 | packetService.addProcessor(packetProcessor, |
| 99 | PacketProcessor.advisor(PKT_PROC_PRIO)); |
| 100 | linkService.addListener(linkListener); |
| 101 | topologyService.addListener(topologyListener); |
| 102 | log.info("Started"); |
| 103 | } |
| 104 | |
| 105 | @Deactivate |
| 106 | protected void deactivate() { |
| 107 | deviceService.removeListener(deviceListener); |
| 108 | packetService.removeProcessor(packetProcessor); |
| 109 | eventExecutor.shutdownNow(); |
| 110 | eventExecutor = null; |
| 111 | linkService.removeListener(linkListener); |
| 112 | topologyService.removeListener(topologyListener); |
| 113 | log.info("Stopped"); |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Captures incoming device events. |
| 118 | */ |
| 119 | private class InternalDeviceListener implements DeviceListener { |
| 120 | |
| 121 | @Override |
| 122 | public void event(DeviceEvent event) { |
| 123 | if (event == null) { |
| 124 | log.error("Device event is null."); |
| 125 | return; |
| 126 | } |
| 127 | mqService.publish(event); |
| 128 | } |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Captures incoming packets from switches connected to ONOS |
| 133 | * controller.. |
| 134 | */ |
| 135 | private class InternalPacketProcessor implements PacketProcessor { |
| 136 | @Override |
| 137 | public void process(PacketContext context) { |
| 138 | if (context == null) { |
| 139 | log.error("Packet context is null."); |
| 140 | return; |
| 141 | } |
| 142 | mqService.publish(context); |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * Listens to link events and processes the link additions. |
| 148 | */ |
| 149 | private class InternalLinkListener implements LinkListener { |
| 150 | @Override |
| 151 | public void event(LinkEvent event) { |
| 152 | if (event == null) { |
| 153 | log.error("Link event is null."); |
| 154 | return; |
| 155 | } |
| 156 | mqService.publish(event); |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Listens to topology events and processes the topology changes. |
| 162 | */ |
| 163 | private class InternalTopologyListener implements TopologyListener { |
| 164 | |
| 165 | @Override |
| 166 | public void event(TopologyEvent event) { |
| 167 | if (event == null) { |
| 168 | log.error("Topology event is null."); |
| 169 | return; |
| 170 | } |
| 171 | mqService.publish(event); |
| 172 | } |
| 173 | } |
| 174 | } |