Madan Jampani | 890bc35 | 2014-10-01 22:35:29 -0700 | [diff] [blame] | 1 | package org.onlab.onos.store.cluster.messaging.impl; |
| 2 | |
| 3 | import static com.google.common.base.Preconditions.checkArgument; |
| 4 | |
| 5 | import java.io.IOException; |
| 6 | import java.util.HashMap; |
| 7 | import java.util.Map; |
| 8 | import java.util.Set; |
| 9 | import java.util.Timer; |
| 10 | import java.util.TimerTask; |
| 11 | |
| 12 | import org.apache.felix.scr.annotations.Activate; |
| 13 | import org.apache.felix.scr.annotations.Component; |
| 14 | import org.apache.felix.scr.annotations.Deactivate; |
| 15 | import org.apache.felix.scr.annotations.Reference; |
| 16 | import org.apache.felix.scr.annotations.ReferenceCardinality; |
| 17 | import org.apache.felix.scr.annotations.Service; |
| 18 | import org.onlab.onos.cluster.ControllerNode; |
| 19 | import org.onlab.onos.cluster.NodeId; |
| 20 | import org.onlab.onos.store.cluster.impl.ClusterNodesDelegate; |
| 21 | import org.onlab.onos.store.cluster.messaging.ClusterCommunicationAdminService; |
| 22 | import org.onlab.onos.store.cluster.messaging.ClusterCommunicationService; |
| 23 | import org.onlab.onos.store.cluster.messaging.ClusterMessage; |
| 24 | import org.onlab.onos.store.cluster.messaging.ClusterMessageHandler; |
| 25 | import org.onlab.onos.store.cluster.messaging.MessageSubject; |
| 26 | import org.onlab.onos.store.messaging.Endpoint; |
| 27 | import org.onlab.onos.store.messaging.Message; |
| 28 | import org.onlab.onos.store.messaging.MessageHandler; |
| 29 | import org.onlab.onos.store.messaging.MessagingService; |
| 30 | import org.slf4j.Logger; |
| 31 | import org.slf4j.LoggerFactory; |
| 32 | |
| 33 | @Component(immediate = true) |
| 34 | @Service |
| 35 | public class OnosClusterCommunicationManager |
| 36 | implements ClusterCommunicationService, ClusterCommunicationAdminService { |
| 37 | |
| 38 | private final Logger log = LoggerFactory.getLogger(getClass()); |
| 39 | |
| 40 | private ControllerNode localNode; |
| 41 | private ClusterNodesDelegate nodesDelegate; |
| 42 | private Map<NodeId, ControllerNode> members = new HashMap<>(); |
| 43 | private final Timer timer = new Timer("onos-controller-heatbeats"); |
| 44 | public static final long HEART_BEAT_INTERVAL_MILLIS = 1000L; |
| 45 | |
| 46 | @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| 47 | private MessagingService messagingService; |
| 48 | |
| 49 | @Activate |
| 50 | public void activate() { |
| 51 | log.info("Started"); |
| 52 | } |
| 53 | |
| 54 | @Deactivate |
| 55 | public void deactivate() { |
| 56 | log.info("Stopped"); |
| 57 | } |
| 58 | |
| 59 | @Override |
| 60 | public boolean broadcast(ClusterMessage message) { |
| 61 | boolean ok = true; |
| 62 | for (ControllerNode node : members.values()) { |
| 63 | if (!node.equals(localNode)) { |
| 64 | ok = unicast(message, node.id()) && ok; |
| 65 | } |
| 66 | } |
| 67 | return ok; |
| 68 | } |
| 69 | |
| 70 | @Override |
| 71 | public boolean multicast(ClusterMessage message, Set<NodeId> nodes) { |
| 72 | boolean ok = true; |
| 73 | for (NodeId nodeId : nodes) { |
| 74 | if (!nodeId.equals(localNode.id())) { |
| 75 | ok = unicast(message, nodeId) && ok; |
| 76 | } |
| 77 | } |
| 78 | return ok; |
| 79 | } |
| 80 | |
| 81 | @Override |
| 82 | public boolean unicast(ClusterMessage message, NodeId toNodeId) { |
| 83 | ControllerNode node = members.get(toNodeId); |
| 84 | checkArgument(node != null, "Unknown nodeId: %s", toNodeId); |
| 85 | Endpoint nodeEp = new Endpoint(node.ip().toString(), node.tcpPort()); |
| 86 | try { |
| 87 | messagingService.sendAsync(nodeEp, message.subject().value(), message); |
| 88 | return true; |
| 89 | } catch (IOException e) { |
| 90 | log.error("Failed to send cluster message to nodeId: " + toNodeId, e); |
| 91 | } |
| 92 | |
| 93 | return false; |
| 94 | } |
| 95 | |
| 96 | @Override |
| 97 | public void addSubscriber(MessageSubject subject, |
| 98 | ClusterMessageHandler subscriber) { |
| 99 | messagingService.registerHandler(subject.value(), new InternalClusterMessageHandler(subscriber)); |
| 100 | } |
| 101 | |
| 102 | @Override |
| 103 | public void initialize(ControllerNode localNode, |
| 104 | ClusterNodesDelegate delegate) { |
| 105 | this.localNode = localNode; |
| 106 | this.nodesDelegate = delegate; |
| 107 | this.addSubscriber(new MessageSubject("CLUSTER_MEMBERSHIP_EVENT"), new ClusterMemebershipEventHandler()); |
| 108 | timer.schedule(new KeepAlive(), 0, HEART_BEAT_INTERVAL_MILLIS); |
| 109 | } |
| 110 | |
| 111 | @Override |
| 112 | public void addNode(ControllerNode node) { |
| 113 | members.put(node.id(), node); |
| 114 | } |
| 115 | |
| 116 | @Override |
| 117 | public void removeNode(ControllerNode node) { |
| 118 | broadcast(new ClusterMessage( |
| 119 | localNode.id(), |
| 120 | new MessageSubject("CLUSTER_MEMBERSHIP_EVENT"), |
| 121 | new ClusterMembershipEvent(ClusterMembershipEventType.LEAVING_MEMBER, node))); |
| 122 | members.remove(node.id()); |
| 123 | } |
| 124 | |
| 125 | // Sends a heart beat to all peers. |
| 126 | private class KeepAlive extends TimerTask { |
| 127 | |
| 128 | @Override |
| 129 | public void run() { |
| 130 | broadcast(new ClusterMessage( |
| 131 | localNode.id(), |
| 132 | new MessageSubject("CLUSTER_MEMBERSHIP_EVENT"), |
| 133 | new ClusterMembershipEvent(ClusterMembershipEventType.HEART_BEAT, localNode))); |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | private class ClusterMemebershipEventHandler implements ClusterMessageHandler { |
| 138 | |
| 139 | @Override |
| 140 | public void handle(ClusterMessage message) { |
| 141 | |
| 142 | ClusterMembershipEvent event = (ClusterMembershipEvent) message.payload(); |
| 143 | ControllerNode node = event.node(); |
| 144 | if (event.type() == ClusterMembershipEventType.HEART_BEAT) { |
| 145 | log.info("Node {} sent a hearbeat", node.id()); |
| 146 | nodesDelegate.nodeDetected(node.id(), node.ip(), node.tcpPort()); |
| 147 | } else if (event.type() == ClusterMembershipEventType.LEAVING_MEMBER) { |
| 148 | log.info("Node {} is leaving", node.id()); |
| 149 | nodesDelegate.nodeRemoved(node.id()); |
| 150 | } else if (event.type() == ClusterMembershipEventType.UNREACHABLE_MEMBER) { |
| 151 | log.info("Node {} is unreachable", node.id()); |
| 152 | nodesDelegate.nodeVanished(node.id()); |
| 153 | } |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | private static class InternalClusterMessageHandler implements MessageHandler { |
| 158 | |
| 159 | private final ClusterMessageHandler handler; |
| 160 | |
| 161 | public InternalClusterMessageHandler(ClusterMessageHandler handler) { |
| 162 | this.handler = handler; |
| 163 | } |
| 164 | |
| 165 | @Override |
| 166 | public void handle(Message message) { |
| 167 | handler.handle((ClusterMessage) message.payload()); |
| 168 | } |
| 169 | } |
| 170 | } |