Jonathan Hart | 4f60f98 | 2014-10-27 08:11:17 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2014 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.onlab.onos.store.packet.impl; |
| 17 | |
| 18 | import static org.slf4j.LoggerFactory.getLogger; |
| 19 | |
| 20 | import java.io.IOException; |
| 21 | |
| 22 | import org.apache.felix.scr.annotations.Activate; |
| 23 | import org.apache.felix.scr.annotations.Component; |
| 24 | import org.apache.felix.scr.annotations.Deactivate; |
| 25 | import org.apache.felix.scr.annotations.Reference; |
| 26 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 27 | import org.apache.felix.scr.annotations.Service; |
| 28 | import org.onlab.onos.cluster.ClusterService; |
| 29 | import org.onlab.onos.cluster.NodeId; |
| 30 | import org.onlab.onos.mastership.MastershipService; |
| 31 | import org.onlab.onos.net.packet.OutboundPacket; |
| 32 | import org.onlab.onos.net.packet.PacketEvent; |
| 33 | import org.onlab.onos.net.packet.PacketEvent.Type; |
| 34 | import org.onlab.onos.net.packet.PacketStore; |
| 35 | import org.onlab.onos.net.packet.PacketStoreDelegate; |
| 36 | import org.onlab.onos.store.AbstractStore; |
| 37 | import org.onlab.onos.store.cluster.messaging.ClusterCommunicationService; |
| 38 | import org.onlab.onos.store.cluster.messaging.ClusterMessage; |
| 39 | import org.onlab.onos.store.cluster.messaging.ClusterMessageHandler; |
| 40 | import org.onlab.onos.store.cluster.messaging.MessageSubject; |
| 41 | import org.onlab.onos.store.serializers.KryoNamespaces; |
| 42 | import org.onlab.onos.store.serializers.KryoSerializer; |
| 43 | import org.onlab.util.KryoNamespace; |
| 44 | import org.slf4j.Logger; |
| 45 | |
| 46 | /** |
| 47 | * Distributed packet store implementation allowing packets to be sent to |
| 48 | * remote instances. |
| 49 | */ |
| 50 | @Component(immediate = true) |
| 51 | @Service |
| 52 | public class DistributedPacketStore |
| 53 | extends AbstractStore<PacketEvent, PacketStoreDelegate> |
| 54 | implements PacketStore { |
| 55 | |
| 56 | private final Logger log = getLogger(getClass()); |
| 57 | |
| 58 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 59 | private MastershipService mastershipService; |
| 60 | |
| 61 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 62 | private ClusterService clusterService; |
| 63 | |
| 64 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 65 | private ClusterCommunicationService communicationService; |
| 66 | |
| 67 | private static final MessageSubject PACKET_OUT_SUBJECT = |
| 68 | new MessageSubject("packet-out"); |
| 69 | |
| 70 | private static final KryoSerializer SERIALIZER = new KryoSerializer() { |
| 71 | @Override |
| 72 | protected void setupKryoPool() { |
| 73 | serializerPool = KryoNamespace.newBuilder() |
| 74 | .register(KryoNamespaces.API) |
| 75 | .build() |
| 76 | .populate(1); |
| 77 | } |
| 78 | }; |
| 79 | |
| 80 | @Activate |
| 81 | public void activate() { |
| 82 | log.info("Started"); |
| 83 | |
| 84 | communicationService.addSubscriber( |
| 85 | PACKET_OUT_SUBJECT, new InternalClusterMessageHandler()); |
| 86 | } |
| 87 | |
| 88 | @Deactivate |
| 89 | public void deactivate() { |
| 90 | log.info("Stopped"); |
| 91 | } |
| 92 | |
| 93 | @Override |
| 94 | public void emit(OutboundPacket packet) { |
| 95 | NodeId myId = clusterService.getLocalNode().id(); |
| 96 | NodeId master = mastershipService.getMasterFor(packet.sendThrough()); |
| 97 | |
| 98 | if (myId.equals(master)) { |
| 99 | notifyDelegate(new PacketEvent(Type.EMIT, packet)); |
| 100 | return; |
| 101 | } |
| 102 | |
| 103 | try { |
| 104 | communicationService.unicast(new ClusterMessage( |
| 105 | myId, PACKET_OUT_SUBJECT, SERIALIZER.encode(packet)), master); |
| 106 | } catch (IOException e) { |
| 107 | log.warn("Failed to send packet-out to {}", master); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Handles incoming cluster messages. |
| 113 | */ |
| 114 | private class InternalClusterMessageHandler implements ClusterMessageHandler { |
| 115 | @Override |
| 116 | public void handle(ClusterMessage message) { |
| 117 | if (!message.subject().equals(PACKET_OUT_SUBJECT)) { |
| 118 | log.warn("Received message with wrong subject: {}", message); |
| 119 | } |
| 120 | |
| 121 | OutboundPacket packet = SERIALIZER.decode(message.payload()); |
| 122 | notifyDelegate(new PacketEvent(Type.EMIT, packet)); |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | } |