| /* |
| * Copyright 2016-present Open Networking Laboratory |
| * |
| * 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.rabbitmq.listener; |
| |
| import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| |
| import java.util.concurrent.ExecutorService; |
| |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.onosproject.net.device.DeviceEvent; |
| import org.onosproject.net.device.DeviceListener; |
| import org.onosproject.net.device.DeviceService; |
| import org.onosproject.net.link.LinkEvent; |
| import org.onosproject.net.link.LinkListener; |
| import org.onosproject.net.link.LinkService; |
| import org.onosproject.net.link.ProbedLinkProvider; |
| import org.onosproject.net.packet.PacketContext; |
| import org.onosproject.net.packet.PacketProcessor; |
| import org.onosproject.net.packet.PacketService; |
| import org.onosproject.net.provider.AbstractProvider; |
| import org.onosproject.net.provider.ProviderId; |
| import org.onosproject.net.topology.TopologyEvent; |
| import org.onosproject.net.topology.TopologyListener; |
| import org.onosproject.net.topology.TopologyService; |
| import org.onosproject.rabbitmq.api.MQConstants; |
| import org.onosproject.rabbitmq.api.MQService; |
| import org.onosproject.rabbitmq.impl.MQServiceImpl; |
| import org.osgi.service.component.ComponentContext; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Listens to events generated from Device Event/PKT_IN/Topology/Link. |
| * Then publishes events to rabbitmq server via publish() api. |
| */ |
| |
| @Component(immediate = true) |
| public class MQEventHandler extends AbstractProvider |
| implements ProbedLinkProvider { |
| |
| private static final Logger log = LoggerFactory.getLogger( |
| MQEventHandler.class); |
| private static final String PROVIDER_NAME = MQConstants.ONOS_APP_NAME; |
| private static final int PKT_PROC_PRIO = 1; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected DeviceService deviceService; |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected PacketService packetService; |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected LinkService linkService; |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected TopologyService topologyService; |
| |
| private MQService mqService; |
| private DeviceListener deviceListener; |
| protected ExecutorService eventExecutor; |
| |
| private final InternalPacketProcessor packetProcessor = |
| new InternalPacketProcessor(); |
| private final LinkListener linkListener = new InternalLinkListener(); |
| private final TopologyListener topologyListener = |
| new InternalTopologyListener(); |
| |
| /** |
| * Initialize parent class with provider. |
| */ |
| public MQEventHandler() { |
| super(new ProviderId("rabbitmq", PROVIDER_NAME)); |
| } |
| |
| @Activate |
| protected void activate(ComponentContext context) { |
| mqService = new MQServiceImpl(context); |
| eventExecutor = newSingleThreadScheduledExecutor( |
| groupedThreads("onos/deviceevents", "events-%d", log)); |
| deviceListener = new InternalDeviceListener(); |
| deviceService.addListener(deviceListener); |
| packetService.addProcessor(packetProcessor, |
| PacketProcessor.advisor(PKT_PROC_PRIO)); |
| linkService.addListener(linkListener); |
| topologyService.addListener(topologyListener); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| deviceService.removeListener(deviceListener); |
| packetService.removeProcessor(packetProcessor); |
| eventExecutor.shutdownNow(); |
| eventExecutor = null; |
| linkService.removeListener(linkListener); |
| topologyService.removeListener(topologyListener); |
| log.info("Stopped"); |
| } |
| |
| /** |
| * Captures incoming device events. |
| */ |
| private class InternalDeviceListener implements DeviceListener { |
| |
| @Override |
| public void event(DeviceEvent event) { |
| if (event == null) { |
| log.error("Device event is null."); |
| return; |
| } |
| mqService.publish(event); |
| } |
| } |
| |
| /** |
| * Captures incoming packets from switches connected to ONOS |
| * controller.. |
| */ |
| private class InternalPacketProcessor implements PacketProcessor { |
| @Override |
| public void process(PacketContext context) { |
| if (context == null) { |
| log.error("Packet context is null."); |
| return; |
| } |
| mqService.publish(context); |
| } |
| } |
| |
| /** |
| * Listens to link events and processes the link additions. |
| */ |
| private class InternalLinkListener implements LinkListener { |
| @Override |
| public void event(LinkEvent event) { |
| if (event == null) { |
| log.error("Link event is null."); |
| return; |
| } |
| mqService.publish(event); |
| } |
| } |
| |
| /** |
| * Listens to topology events and processes the topology changes. |
| */ |
| private class InternalTopologyListener implements TopologyListener { |
| |
| @Override |
| public void event(TopologyEvent event) { |
| if (event == null) { |
| log.error("Topology event is null."); |
| return; |
| } |
| mqService.publish(event); |
| } |
| } |
| } |