| package org.onlab.onos.store.cluster.messaging.impl; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.Timer; |
| import java.util.TimerTask; |
| |
| 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.Service; |
| import org.onlab.onos.cluster.ControllerNode; |
| import org.onlab.onos.cluster.NodeId; |
| import org.onlab.onos.store.cluster.impl.ClusterMembershipEvent; |
| import org.onlab.onos.store.cluster.impl.ClusterMembershipEventType; |
| import org.onlab.onos.store.cluster.impl.ClusterNodesDelegate; |
| import org.onlab.onos.store.cluster.messaging.ClusterCommunicationAdminService; |
| import org.onlab.onos.store.cluster.messaging.ClusterCommunicationService; |
| import org.onlab.onos.store.cluster.messaging.ClusterMessage; |
| import org.onlab.onos.store.cluster.messaging.ClusterMessageHandler; |
| import org.onlab.onos.store.cluster.messaging.MessageSubject; |
| import org.onlab.onos.store.serializers.KryoPoolUtil; |
| import org.onlab.onos.store.serializers.KryoSerializer; |
| import org.onlab.util.KryoPool; |
| import org.onlab.netty.Endpoint; |
| import org.onlab.netty.Message; |
| import org.onlab.netty.MessageHandler; |
| import org.onlab.netty.MessagingService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @Component(immediate = true) |
| @Service |
| public class ClusterCommunicationManager |
| implements ClusterCommunicationService, ClusterCommunicationAdminService { |
| |
| private final Logger log = LoggerFactory.getLogger(getClass()); |
| |
| private ControllerNode localNode; |
| private ClusterNodesDelegate nodesDelegate; |
| // FIXME: `members` should go away and should be using ClusterService |
| private Map<NodeId, ControllerNode> members = new HashMap<>(); |
| private final Timer timer = new Timer("onos-controller-heatbeats"); |
| public static final long HEART_BEAT_INTERVAL_MILLIS = 1000L; |
| |
| // TODO: This probably should not be a OSGi service. |
| //@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| private MessagingService messagingService; |
| |
| private static final KryoSerializer SERIALIZER = new KryoSerializer() { |
| protected void setupKryoPool() { |
| serializerPool = KryoPool.newBuilder() |
| .register(KryoPoolUtil.API) |
| .register(ClusterMessage.class) |
| .register(ClusterMembershipEvent.class) |
| .build() |
| .populate(1); |
| } |
| |
| }; |
| |
| @Activate |
| public void activate() { |
| // TODO: initialize messagingService |
| // TODO: setPayloadSerializer, which is capable of |
| // (1) serialize ClusterMessage - ClusterMessage.payload |
| // (2) serialize ClusterMessage.payload using user specified serializer |
| // messagingService.setPayloadSerializer(...); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| // TODO: cleanup messageingService if needed. |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public boolean broadcast(ClusterMessage message) { |
| boolean ok = true; |
| for (ControllerNode node : members.values()) { |
| if (!node.equals(localNode)) { |
| ok = unicast(message, node.id()) && ok; |
| } |
| } |
| return ok; |
| } |
| |
| @Override |
| public boolean multicast(ClusterMessage message, Set<NodeId> nodes) { |
| boolean ok = true; |
| for (NodeId nodeId : nodes) { |
| if (!nodeId.equals(localNode.id())) { |
| ok = unicast(message, nodeId) && ok; |
| } |
| } |
| return ok; |
| } |
| |
| @Override |
| public boolean unicast(ClusterMessage message, NodeId toNodeId) { |
| ControllerNode node = members.get(toNodeId); |
| checkArgument(node != null, "Unknown nodeId: %s", toNodeId); |
| Endpoint nodeEp = new Endpoint(node.ip().toString(), node.tcpPort()); |
| try { |
| messagingService.sendAsync(nodeEp, message.subject().value(), SERIALIZER.encode(message)); |
| return true; |
| } catch (IOException e) { |
| log.error("Failed to send cluster message to nodeId: " + toNodeId, e); |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public void addSubscriber(MessageSubject subject, |
| ClusterMessageHandler subscriber) { |
| messagingService.registerHandler(subject.value(), new InternalClusterMessageHandler(subscriber)); |
| } |
| |
| @Override |
| public void initialize(ControllerNode localNode, |
| ClusterNodesDelegate delegate) { |
| this.localNode = localNode; |
| this.nodesDelegate = delegate; |
| this.addSubscriber(new MessageSubject("CLUSTER_MEMBERSHIP_EVENT"), new ClusterMemebershipEventHandler()); |
| timer.schedule(new KeepAlive(), 0, HEART_BEAT_INTERVAL_MILLIS); |
| } |
| |
| @Override |
| public void addNode(ControllerNode node) { |
| members.put(node.id(), node); |
| } |
| |
| @Override |
| public void removeNode(ControllerNode node) { |
| broadcast(new ClusterMessage( |
| localNode.id(), |
| new MessageSubject("CLUSTER_MEMBERSHIP_EVENT"), |
| SERIALIZER.encode(new ClusterMembershipEvent(ClusterMembershipEventType.LEAVING_MEMBER, node)))); |
| members.remove(node.id()); |
| } |
| |
| // Sends a heart beat to all peers. |
| private class KeepAlive extends TimerTask { |
| |
| @Override |
| public void run() { |
| broadcast(new ClusterMessage( |
| localNode.id(), |
| new MessageSubject("CLUSTER_MEMBERSHIP_EVENT"), |
| SERIALIZER.encode(new ClusterMembershipEvent(ClusterMembershipEventType.HEART_BEAT, localNode)))); |
| } |
| } |
| |
| private class ClusterMemebershipEventHandler implements ClusterMessageHandler { |
| |
| @Override |
| public void handle(ClusterMessage message) { |
| |
| ClusterMembershipEvent event = SERIALIZER.decode(message.payload()); |
| ControllerNode node = event.node(); |
| if (event.type() == ClusterMembershipEventType.HEART_BEAT) { |
| log.info("Node {} sent a hearbeat", node.id()); |
| nodesDelegate.nodeDetected(node.id(), node.ip(), node.tcpPort()); |
| } else if (event.type() == ClusterMembershipEventType.LEAVING_MEMBER) { |
| log.info("Node {} is leaving", node.id()); |
| nodesDelegate.nodeRemoved(node.id()); |
| } else if (event.type() == ClusterMembershipEventType.UNREACHABLE_MEMBER) { |
| log.info("Node {} is unreachable", node.id()); |
| nodesDelegate.nodeVanished(node.id()); |
| } |
| } |
| } |
| |
| private static class InternalClusterMessageHandler implements MessageHandler { |
| |
| private final ClusterMessageHandler handler; |
| |
| public InternalClusterMessageHandler(ClusterMessageHandler handler) { |
| this.handler = handler; |
| } |
| |
| @Override |
| public void handle(Message message) { |
| ClusterMessage clusterMessage = SERIALIZER.decode(message.payload()); |
| handler.handle(clusterMessage); |
| } |
| } |
| } |